Merge pull request #408 from AtkinsSJ/git-client

Add a git client

packages/backend/src/SelfHostedModule.js

@@ -40,6 +40,15 @@ class SelfHostedModule extends AdvancedBase {
                         PUTER_JS_URL: ({ global_config: config }) => config.origin + '/sdk/puter.dev.js',
                     }
                 },
+                {
+                    name: 'git:rollup-watch',
+                    directory: 'packages/git',
+                    command: 'npx',
+                    args: ['rollup', '-c', 'rollup.config.js', '--watch'],
+                    env: {
+                        PUTER_JS_URL: ({ global_config: config }) => config.origin + '/sdk/puter.dev.js',
+                    }
+                },
             ],
         });
 
@@ -58,6 +67,10 @@ class SelfHostedModule extends AdvancedBase {
                     prefix: '/builtin/phoenix',
                     path: path_.resolve(__dirname, '../../../packages/phoenix/dist'),
                 },
+                {
+                    prefix: '/builtin/git',
+                    path: path_.resolve(__dirname, '../../../packages/git/dist'),
+                },
             ],
         });
     }

packages/backend/src/services/database/SqliteDatabaseAccessService.js

@@ -42,7 +42,7 @@ class SqliteDatabaseAccessService extends BaseDatabaseAccessService {
         this.db = new Database(this.config.path);
 
         // Database upgrade logic
-        const TARGET_VERSION = 7;
+        const TARGET_VERSION = 8;
 
         if ( do_setup ) {
             this.log.noticeme(`SETUP: creating database at ${this.config.path}`);
@@ -56,6 +56,7 @@ class SqliteDatabaseAccessService extends BaseDatabaseAccessService {
                 '0007_sessions.sql',
                 '0008_otp.sql',
                 '0009_app-prefix-fix.sql',
+                '0010_add-git-app.sql',
             ].map(p => path_.join(__dirname, 'sqlite_setup', p));
             const fs = require('fs');
             for ( const filename of sql_files ) {
@@ -100,6 +101,10 @@ class SqliteDatabaseAccessService extends BaseDatabaseAccessService {
             upgrade_files.push('0009_app-prefix-fix.sql');
         }
 
+        if ( user_version <= 7 ) {
+            upgrade_files.push('0010_add-git-app.sql');
+        }
+
         if ( upgrade_files.length > 0 ) {
             this.log.noticeme(`Database out of date: ${this.config.path}`);
             this.log.noticeme(`UPGRADING DATABASE: ${user_version} -> ${TARGET_VERSION}`);

packages/backend/src/services/database/sqlite_setup/0010_add-git-app.sql

@@ -0,0 +1,4 @@
+INSERT INTO `apps`
+    (`uid`, `owner_user_id`, `icon`, `name`, `title`, `description`, `godmode`, `background`, `maximize_on_start`, `index_url`, `approved_for_listing`, `approved_for_opening_items`, `approved_for_incentive_program`, `timestamp`, `last_review`, `tags`, `app_owner`)
+VALUES
+    ('app-e3ac5486-da8c-42ad-8377-8728086e0980', 1, 'data:image/svg+xml;base64,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', 'git', 'Git', 'Puter Git client', 0, 1, 0, 'https://builtins.namespaces.puter.com/git', 1, 0, 0, '2024-05-15 10:33:00', NULL, 'productivity', NULL);

packages/git/.gitignore

@@ -0,0 +1,2 @@
+node_modules/
+dist/

packages/git/LICENSE

@@ -0,0 +1,661 @@
+                    GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
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+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Remote Network Interaction; Use with the GNU General Public License.
+
+  Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software.  This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero General Public License from time to time.  Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<https://www.gnu.org/licenses/>.

packages/git/README.md

@@ -0,0 +1,3 @@
+# Puter Git Client
+
+This is a git client running on the Puter filesystem, using [isomorphic-git](https://isomorphic-git.org).

packages/git/assets/index.html

@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>Git client</title>
+    <script src="__SDK_URL__"></script>
+    <script src="config.js"></script>
+    <script src="bundle.js"></script>
+    <script>
+        document.addEventListener('DOMContentLoaded', async () => {
+            main();
+        });
+    </script>
+</head>
+<body>
+    This is a cli app so you shouldn't see this
+</body>
+</html>

packages/git/config/dev.js

@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Phoenix Shell.
+ *
+ * Phoenix Shell is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+globalThis.__CONFIG__ = {
+    sdk_url: 'http://puter.localhost:4100/sdk/puter.js',
+};

packages/git/config/release.js

@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Phoenix Shell.
+ *
+ * Phoenix Shell is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+globalThis.__CONFIG__ = {
+    sdk_url: 'https://puter.com/puter.js/v2',
+};

packages/git/package.json

@@ -0,0 +1,25 @@
+{
+  "name": "git",
+  "version": "1.0.0",
+  "description": "Git Client for Puter",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "Puter Technologies Inc.",
+  "license": "AGPL-3.0-only",
+  "type": "module",
+  "devDependencies": {
+    "@rollup/plugin-commonjs": "^24.1.0",
+    "@rollup/plugin-node-resolve": "^15.0.2",
+    "@rollup/plugin-replace": "^5.0.2",
+    "mocha": "^10.2.0",
+    "rollup": "^3.21.4",
+    "rollup-plugin-copy": "^3.4.0"
+  },
+  "dependencies": {
+    "@pkgjs/parseargs": "^0.11.0",
+    "buffer": "^6.0.3",
+    "isomorphic-git": "^1.25.10"
+  }
+}

packages/git/rollup.config.js

@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Phoenix Shell.
+ *
+ * Phoenix Shell is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import { nodeResolve } from '@rollup/plugin-node-resolve'
+import commonjs from '@rollup/plugin-commonjs';
+import copy from 'rollup-plugin-copy';
+import process from 'node:process';
+
+const configFile = process.env.CONFIG_FILE ?? 'config/dev.js';
+await import(`./${configFile}`);
+
+export default {
+    input: "src/main.js",
+    output: {
+        file: "dist/bundle.js",
+        format: "iife"
+    },
+    plugins: [
+        nodeResolve({
+            browser: true,
+            preferBuiltins: false,
+        }),
+        commonjs(),
+        copy({
+            targets: [
+                {
+                    src: 'assets/index.html',
+                    dest: 'dist',
+                    transform: (contents, name) => {
+                        return contents.toString().replace('__SDK_URL__',
+                            process.env.PUTER_JS_URL ?? globalThis.__CONFIG__.sdk_url);
+                    }
+                },
+                { src: configFile, dest: 'dist', rename: 'config.js' }
+            ]
+        }),
+    ]
+}

packages/git/src/filesystem.js

@@ -0,0 +1,196 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import { PosixError } from '@heyputer/puter-js-common/src/PosixError.js';
+import path_ from 'path-browserify';
+
+let debug = false;
+
+// Takes a Puter stat() result and converts it to the format expected by isomorphic-git
+const convert_stat = (stat, options) => {
+    // Puter returns the times as timestamps in seconds
+    const timestamp_date = (timestamp) => new Date(timestamp * 1000);
+    const timestamp_ms = (timestamp) => options.bigint ? BigInt(timestamp) * 1000n : timestamp * 1000;
+    const timestamp_ns = (timestamp) => options.bigint ? BigInt(timestamp) * 1000000n : undefined;
+
+    // We don't record ctime, but the most recent of atime and mtime is a reasonable approximation
+    const ctime = Math.max(stat.accessed, stat.modified);
+
+    const mode = (() => {
+        // Puter doesn't expose this, but we can approximate it based on the stats we have.
+        let user = stat.immutable ? 4 : 6;
+        let group = stat.immutable ? 4 : 6;
+        let other = stat.is_public ? 4 : 0;
+        // Octal number
+        return user << 6 | group << 3 | other;
+    })();
+
+    return {
+        dev: 1, // Puter doesn't expose this
+        ino: stat.id,
+        mode: mode,
+        nlink: 1, // Definition of hard-link number is platform-defined. Linux includes subdir count, Mac includes child count.
+        uid: stat.uid,
+        gid: stat.uid, // Puter doesn't have gids
+        rdev: 0,
+        size: stat.size,
+        blksize: 4096, // Abitrary!
+        blocks: Math.ceil(stat.size / 4096),
+        atime: timestamp_date(stat.accessed),
+        mtime: timestamp_date(stat.modified),
+        ctime: timestamp_date(ctime),
+        birthtime: timestamp_date(stat.created),
+        atimeMs: timestamp_ms(stat.accessed),
+        mtimeMs: timestamp_ms(stat.modified),
+        ctimeMs: timestamp_ms(ctime),
+        birthtimeMs: timestamp_ms(stat.created),
+        atimeNs: timestamp_ns(stat.accessed),
+        mtimeNs: timestamp_ns(stat.modified),
+        ctimeNs: timestamp_ns(ctime),
+        birthtimeNs: timestamp_ns(stat.created),
+
+        isBlockDevice: () => false,
+        isCharacterDevice: () => false,
+        isDirectory: () => stat.is_dir,
+        isFIFO: () => false,
+        isFile: () => !stat.is_dir,
+        isSocket: () => false,
+        isSymbolicLink: () => stat.is_symlink,
+    };
+};
+
+const adapt_path = (input_path) => {
+    if (input_path[0] === '/') return input_path;
+    return path_.relative(window.process.cwd(), input_path);
+};
+
+// Implements the API expected by isomorphic-git
+// See: https://isomorphic-git.org/docs/en/fs#using-the-promise-api-preferred
+export default {
+    enable_debugging: () => { debug = true; },
+    promises: {
+        readFile: async (path, options = {}) => {
+            if (debug) console.trace('readFile', path, options);
+            // TODO: Obey options
+            try {
+                const blob = await puter.fs.read(adapt_path(path));
+                if (options.encoding === 'utf8')
+                    return await blob.text();
+                return blob.arrayBuffer();
+            } catch (e) {
+                throw PosixError.fromPuterAPIError(e);
+            }
+        },
+        writeFile: async (path, data, options = {}) => {
+            if (debug) console.trace('writeFile', path, data, options);
+            // TODO: Obey options
+
+            // Convert data into a type puter.fs.write() understands.
+            // Can be: <string> | <Buffer> | <TypedArray> | <DataView>
+            // Puter supports: <string> | <File> | <Blob>
+            if (
+                data instanceof window.Buffer // Buffer
+                || ArrayBuffer.isView(data)   // TypedArray
+                || data instanceof DataView   // DataView
+            ) {
+                data = new File([data], path_.basename(path));
+            }
+
+            try {
+                return await puter.fs.write(adapt_path(path), data);
+            } catch (e) {
+                throw PosixError.fromPuterAPIError(e);
+            }
+        },
+        unlink: async (path) => {
+            if (debug) console.trace('unlink', path);
+            // TODO: If `path` is a symlink, only remove the link
+            try {
+                return await puter.fs.delete(adapt_path(path), { recursive: false });
+            } catch (e) {
+                throw PosixError.fromPuterAPIError(e);
+            }
+        },
+        readdir: async (path, options = {}) => {
+            if (debug) console.trace('readdir', path, options);
+            // TODO: Obey options
+            try {
+                const results = await puter.fs.readdir(adapt_path(path));
+                // Puter returns an array of stat entries, but we only want the file names
+                return results.map(it => path_.basename(it.path));
+            } catch (e) {
+                throw PosixError.fromPuterAPIError(e);
+            }
+        },
+        mkdir: async (path, mode) => {
+            if (debug) console.trace('mkdir', path, mode);
+            // NOTE: Puter filesystem doesn't have file permissions
+            try {
+                return await puter.fs.mkdir(adapt_path(path));
+            } catch (e) {
+                throw PosixError.fromPuterAPIError(e);
+            }
+        },
+        rmdir: async (path) => {
+            if (debug) console.trace('rmdir', path);
+            // TODO: Only delete dir if it's empty
+            try {
+                return await puter.fs.delete(adapt_path(path), { recursive: true });
+            } catch (e) {
+                throw PosixError.fromPuterAPIError(e);
+            }
+        },
+        stat: async (path, options = {}) => {
+            if (debug) console.trace('stat', path, options);
+            // TODO: Obey options
+            try {
+                return convert_stat(await puter.fs.stat(adapt_path(path)), options);
+            } catch (e) {
+                throw PosixError.fromPuterAPIError(e);
+            }
+        },
+        lstat: async (path, options = {}) => {
+            if (debug) console.trace('lstat', path, options);
+            // TODO: Obey options
+            // TODO: Stat the link itself.
+            try {
+                return convert_stat(await puter.fs.stat(adapt_path(path)), options);
+            } catch (e) {
+                throw PosixError.fromPuterAPIError(e);
+            }
+        },
+        readlink: async (path, options = {}) => {
+            if (debug) console.trace('readlink', path, options);
+            try {
+                const stat = await puter.fs.stat(adapt_path(path));
+                return stat.symlink_path;
+            } catch (e) {
+                throw PosixError.fromPuterAPIError(e);
+            }
+        },
+        symlink: async (target, path, type) => {
+            if (debug) console.trace('symlink', target, path, type);
+            // TODO: Add symlink creation to puter.fs API
+            throw PosixError.OperationNotPermitted({ message: 'Puter.fs API does not support creating symlinks' });
+        },
+        chmod: async (path, mode) => {
+            if (debug) console.trace('chmod', path, mode);
+            // NOTE: No-op, Puter doesn't have file permissions
+        },
+    },
+};

packages/git/src/format.js

@@ -0,0 +1,214 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import { shorten_hash } from './git-helpers.js';
+
+export const commit_formatting_options = {
+    'abbrev-commit': {
+        description: 'Display commit hashes in abbreviated form.',
+        type: 'boolean',
+    },
+    'no-abbrev-commit': {
+        description: 'Always show full commit hashes.',
+        type: 'boolean',
+    },
+    'format': {
+        description: 'Format to use for commits.',
+        type: 'string',
+    },
+    'oneline': {
+        description: 'Shorthand for "--format=oneline --abbrev-commit".',
+        type: 'boolean',
+    },
+};
+
+/**
+ * Process command-line options related to commit formatting, and modify them in place.
+ * May throw if the options are in some way invalid.
+ * @param options Parsed command-line options, which will be modified in place.
+ */
+export const process_commit_formatting_options = (options) => {
+    if (options.oneline) {
+        options.format = 'oneline';
+        options['abbrev-commit'] = true;
+    }
+
+    options.short_hashes = (options['abbrev-commit'] === true) && (options['no-abbrev-commit'] !== true);
+    delete options['abbrev-commit'];
+    delete options['no-abbrev-commit'];
+
+    if (!options.format) {
+        options.format = 'medium';
+    }
+    if (!['oneline', 'short', 'medium', 'full', 'fuller', 'raw'].includes(options.format)) {
+        throw new Error(`Invalid --format format: ${options.format}`);
+    }
+}
+
+/**
+ * Format the given oid hash, followed by any refs that point to it
+ * @param oid
+ * @param short_hashes Whwther to shorten the hash
+ * @returns {String}
+ */
+export const format_oid = (oid, { short_hashes = false } = {}) => {
+    // TODO: List refs at this commit, after the hash
+    return short_hashes ? shorten_hash(oid) : oid;
+}
+
+/**
+ * Format the person's name and email as `${name} <${email}>`
+ * @param person
+ * @returns {`${string} <${string}>`}
+ */
+export const format_person = (person) => {
+    return `${person.name} <${person.email}>`;
+}
+
+/**
+ * Format a date
+ * @param date
+ * @param options
+ * @returns {string}
+ */
+export const format_date = (date, options = {}) => {
+    // TODO: This needs to obey date-format options, and should show the correct timezone not UTC
+    return new Date(date.timestamp * 1000).toUTCString();
+}
+
+/**
+ * Format the date, according to the "raw" display format.
+ * @param owner
+ * @returns {`${string} ${string}${string}${string}`}
+ */
+export const format_timestamp_and_offset = (owner) => {
+    // FIXME: The timezone offset is inverted.
+    //        Either this is correct here, or we should be inverting it when creating the commit -
+    //        Isomorphic git uses (new Date()).timezoneOffset() there, which returns -60 for BST, which is UTC+0100
+    const offset = -owner.timezoneOffset;
+    const offset_hours = Math.floor(offset / 60);
+    const offset_minutes = offset % 60;
+    const pad = (number) => `${Math.abs(number) < 10 ? '0' : ''}${Math.abs(number)}`;
+    return `${owner.timestamp} ${offset < 0 ? '-' : '+'}${pad(offset_hours)}${pad(offset_minutes)}`;
+}
+
+/**
+ * Produce a string representation of a commit.
+ * @param commit A CommitObject
+ * @param oid Commit hash
+ * @param options Options returned by parsing the command arguments in `commit_formatting_options`
+ * @returns {string}
+ */
+export const format_commit = (commit, oid, options = {}) => {
+    const title_line = () => commit.message.split('\n')[0];
+
+    switch (options.format || 'medium') {
+        // TODO: Other formats
+        case 'oneline':
+            return `${format_oid(oid, options)} ${title_line()}`;
+        case 'short': {
+            let s = '';
+            s += `commit ${format_oid(oid, options)}\n`;
+            s += `Author: ${format_person(commit.author)}\n`;
+            s += '\n';
+            s += title_line();
+            return s;
+        }
+        case 'medium': {
+            let s = '';
+            s += `commit ${format_oid(oid, options)}\n`;
+            s += `Author: ${format_person(commit.author)}\n`;
+            s += `Date:   ${format_date(commit.author)}\n`;
+            s += '\n';
+            s += commit.message;
+            return s;
+        }
+        case 'full': {
+            let s = '';
+            s += `commit ${format_oid(oid, options)}\n`;
+            s += `Author: ${format_person(commit.author)}\n`;
+            s += `Commit: ${format_person(commit.committer)}\n`;
+            s += '\n';
+            s += commit.message;
+            return s;
+        }
+        case 'fuller': {
+            let s = '';
+            s += `commit ${format_oid(oid, options)}\n`;
+            s += `Author:     ${format_person(commit.author)}\n`;
+            s += `AuthorDate: ${format_date(commit.author)}\n`;
+            s += `Commit:     ${format_person(commit.committer)}\n`;
+            s += `CommitDate: ${format_date(commit.committer)}\n`;
+            s += '\n';
+            s += commit.message;
+            return s;
+        }
+        case 'raw': {
+            let s = '';
+            s += `commit ${oid}\n`;
+            s += `tree ${commit.tree}\n`;
+            if (commit.parent[0])
+                s += `parent ${commit.parent[0]}\n`;
+            s += `author ${format_person(commit.author)} ${format_timestamp_and_offset(commit.author)}\n`;
+            s += `committer ${format_person(commit.committer)} ${format_timestamp_and_offset(commit.committer)}\n`;
+            s += '\n';
+            s += commit.message;
+            return s;
+        }
+        default: {
+            throw new Error(`Invalid --format format: ${options.format}`);
+        }
+    }
+}
+
+/**
+ * Produce a string representation of a tree.
+ * @param oid
+ * @param tree
+ * @param options
+ * @returns {string}
+ */
+export const format_tree = (oid, tree, options = {}) => {
+    let s = '';
+    s += `tree ${oid}\n`;
+    s += '\n';
+    for (const tree_entry of tree) {
+        s += `${tree_entry.path}\n`;
+    }
+    s += '\n';
+    return s;
+}
+
+/**
+ * Produce a string representation of a tag.
+ * Note that this only includes the tag itself, and not the tag's target,
+ * which must be separately retrieved and formatted.
+ * @param tag
+ * @param options
+ * @returns {string}
+ */
+export const format_tag = (tag, options = {}) => {
+    let s = '';
+    s += `tag ${tag.tag}\n`;
+    s += `Tagger: ${format_person(tag.tagger)}\n`;
+    s += `Date:   ${format_date(tag.tagger, options)}\n`;
+    if (tag.message) {
+        s += `\n${tag.message}\n\n`;
+    }
+    return s;
+}

packages/git/src/git-command-definition.js

@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ * The command definition for `git` itself, in the same format as subcommands.
+ */
+export default {
+    name: 'git',
+    usage: 'git [--version] [--help] [command] [command-args...]',
+    description: 'Git version-control client for Puter.',
+    args: {
+        options: {
+            help: {
+                description: 'Display help information for git itself, or a subcommand.',
+                type: 'boolean',
+            },
+            version: {
+                description: 'Display version information about git.',
+                type: 'boolean',
+            },
+        },
+    },
+};

packages/git/src/git-helpers.js

@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import path from 'path-browserify';
+
+/**
+ * Attempt to locate the git repository directory.
+ * @throws Error If no git repository could be found, or another error occurred.
+ * @param fs Filesystem API
+ * @param pwd Directory to search from
+ * @returns {Promise<{repository_dir: (string|*), git_dir: (string|string)}>}
+ */
+export const find_repo_root = async (fs, pwd) => {
+    if (!path.isAbsolute(pwd))
+        throw new Error(`PWD is not absolute: ${pwd}`);
+
+    let current_path = path.normalize(pwd);
+    while (true) {
+        let stat;
+        const current_git_path = path.resolve(current_path, './.git');
+        try {
+            stat = await fs.promises.stat(current_git_path);
+        } catch (e) {
+            if (e.code === 'ENOENT') {
+                if (current_path === '/')
+                    break;
+
+                current_path = path.dirname(current_path);
+                continue;
+            }
+
+            throw e;
+        }
+
+        // If .git exists, we're probably in a git repo so call that good.
+        // TODO: The git cli seems to check other things, maybe try to match that behaviour.
+
+        const result = {
+            repository_dir: current_path,
+            git_dir: current_git_path,
+        };
+
+        // Non-default-git-folder repos have .git as a text file containing the git dir path.
+        if (stat.isFile()) {
+            const contents = await fs.promises.readFile(current_git_path, { encoding: 'utf8' });
+            // The format of .git is `gitdir: /path/to/git/dir`
+            const prefix = 'gitdir:';
+            if (!contents.startsWith(prefix))
+                throw new Error(`invalid gitfile format: ${current_git_path}`);
+            result.git_dir = contents.slice(prefix.length).trim();
+        }
+
+        return result;
+    }
+
+    throw new Error('not a git repository (or any of the parent directories): .git');
+}
+
+/**
+ * Produce a shortened version of the given hash, which is still unique within the repo.
+ * TODO: Ensure that whatever we produce is unique within the repo.
+ *       For now this is just a convenience function, so there's one place to change later.
+ * @param hash
+ * @returns {String} The shortened hash
+ */
+export const shorten_hash = (hash) => {
+    // TODO: Ensure that whatever we produce is unique within the repo
+    return hash.slice(0, 7);
+}

packages/git/src/help.js

@@ -0,0 +1,143 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+/**
+ * Throw this from a subcommand's execute() in order to print its usage text to stderr.
+ * @type {symbol}
+ */
+export const SHOW_USAGE = Symbol('SHOW_USAGE');
+
+/**
+ * Full manual page for the command.
+ * @param command
+ * @returns {string}
+ */
+export const produce_help_string = (command) => {
+    const { name, usage, description, args } = command;
+    const options = args?.options;
+
+    let s = '';
+    const indent = '    ';
+
+    const heading = (text) => {
+        s += `\n\x1B[34;1m${text}:\x1B[0m\n`
+    };
+
+    heading('SYNOPSIS');
+    if (!usage) {
+        s += `${indent}git ${name}\n`;
+    } else if (typeof usage === 'string') {
+        s += `${indent}${usage}\n`;
+    } else {
+        let first = true;
+        for (const usage_line of usage) {
+            if (first) {
+                first = false;
+                s += `${indent}${usage_line}\n`;
+            } else {
+                s += `${indent}${usage_line}\n`;
+            }
+        }
+    }
+
+    if (description) {
+        heading('DESCRIPTION');
+        s += `${indent}${description}\n`;
+    }
+
+    if (typeof options === 'object' && Object.keys(options).length > 0) {
+        heading('OPTIONS');
+        // Figure out how long each invocation is, so we can align the descriptions
+        for (const [name, option] of Object.entries(options)) {
+            // Invocation
+            s += indent;
+            if (option.short)
+                s += `-${option.short}, `;
+            s += `--${name}`;
+            if (option.type !== 'boolean')
+                s += ` <${option.type}>`;
+            s += '\n';
+
+            // Description
+            s += `${indent}${indent}${option.description}\n\n`;
+        }
+    }
+
+    if (!s.endsWith('\n\n'))
+        s += '\n';
+
+    return s;
+}
+
+/**
+ * Usage for the command, which is a short summary.
+ * @param command
+ * @returns {string}
+ */
+export const produce_usage_string = (command) => {
+    const { name, usage, args } = command;
+    const options = args?.options;
+
+    let s = '';
+
+    // Usage
+    if (!usage) {
+        s += `usage: git ${name}\n`;
+    } else if (typeof usage === 'string') {
+        s += `usage: ${usage}\n`;
+    } else {
+        let first = true;
+        for (const usage_line of usage) {
+            if (first) {
+                first = false;
+                s += `usage: ${usage_line}\n`;
+            } else {
+                s += `   or: ${usage_line}\n`;
+            }
+        }
+    }
+
+    // List of options
+    if (typeof options === 'object' && Object.keys(options).length > 0) {
+        // Figure out how long each invocation is, so we can align the descriptions
+        const option_strings = Object.entries(options).map(([name, option]) => {
+            let invocation = '';
+            if (option.short)
+                invocation += `-${option.short}, `;
+            invocation += `--${name}`;
+            if (option.type !== 'boolean')
+                invocation += ` <${option.type}>`;
+
+            return [invocation, option.description];
+        });
+
+        const indent_size = 2 + option_strings.reduce(
+            (max_length, option) => Math.max(max_length, option[0].length), 0);
+
+        s += '\n';
+        for (const [invocation, description] of option_strings) {
+            s += `    ${invocation}`;
+            if (indent_size - invocation.length > 0)
+                s += ' '.repeat(indent_size - invocation.length);
+            s += `${description}\n`;
+        }
+    }
+
+    return s;
+}

packages/git/src/main.js

@@ -0,0 +1,162 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import { parseArgs } from '@pkgjs/parseargs';
+import subcommands from './subcommands/__exports__.js';
+import git_command from './git-command-definition.js';
+import fs from './filesystem.js';
+import git from 'isomorphic-git';
+import { Buffer } from 'buffer';
+import { produce_usage_string, SHOW_USAGE } from './help.js';
+
+const encoder = new TextEncoder();
+
+window.Buffer = Buffer;
+
+window.main = async () => {
+    const shell = puter.ui.parentApp();
+    if (!shell) {
+        await puter.ui.alert('Git must be run from a terminal. Try `git --help`');
+        puter.exit();
+        return;
+    }
+
+    shell.on('close', () => {
+        console.log('Shell closed; exiting git...');
+        puter.exit();
+    });
+
+    const stdout = (message) => {
+        shell.postMessage({
+            $: 'stdout',
+            data: encoder.encode(message + '\n'),
+        });
+    };
+    // TODO: Separate stderr message?
+    const stderr = stdout;
+
+    const url_params = new URL(document.location).searchParams;
+    const puter_args = JSON.parse(url_params.get('puter.args')) ?? {};
+    const { command_line, env } = puter_args;
+
+    // isomorphic-git assumes the Node.js process object exists,
+    // so fill-in the parts it uses.
+    window.process = {
+        cwd: () => env.PWD,
+        platform: 'puter',
+    }
+
+    // Git's command structure is a little unusual:
+    // > git [options-for-git] [subcommand [options-and-args-for-subcommand]]
+    // Also, a couple of options (--help and --version) are syntactic sugar for `help` and `version` subcommands.
+    // The approach here is to first try and parse these top-level options, and then based on that, run a subcommand.
+
+    // If no raw args, just print help and exit
+    const raw_args = command_line?.args ?? [];
+    if (raw_args.length === 0) {
+        stdout(produce_usage_string(git_command));
+        puter.exit();
+        return;
+    }
+
+    const { values: global_options, positionals: global_positionals } = parseArgs({
+        options: git_command.args.options,
+        allowPositionals: true,
+        args: raw_args,
+        strict: false,
+    });
+
+    let subcommand_name = null;
+    let first_positional_is_subcommand = false;
+    if (global_options.help) {
+        subcommand_name = 'help';
+    } else if (global_options.version) {
+        subcommand_name = 'version';
+    }
+
+    if (!subcommand_name) {
+        subcommand_name = global_positionals[0];
+        first_positional_is_subcommand = true;
+    }
+
+    // See if we're running a subcommand we recognize
+    let exit_code = 0;
+    const subcommand = subcommands[subcommand_name];
+    if (!subcommand) {
+        stderr(`git: '${subcommand_name}' is not a recognized git command. See 'git --help'`);
+        puter.exit(1);
+        return;
+    }
+
+    // Try and remove the subcommand positional arg, and any global options, from args.
+    const subcommand_args = raw_args;
+    const remove_arg = (arg) => {
+        const index = subcommand_args.indexOf(arg);
+        if (index >= 0)
+            subcommand_args.splice(index, 1);
+
+    }
+    remove_arg('--help');
+    remove_arg('--version');
+    if (first_positional_is_subcommand) {
+        // TODO: This is not a 100% reliable way to do this, as it may also match the value of `--option-with-value value`
+        //       But that's not a problem until we add some global options that take a value.
+        remove_arg(subcommand_name);
+    }
+
+    // Parse the remaining args scoped to this subcommand, and run it.
+    let parsed_args;
+    try {
+        parsed_args = parseArgs({
+            ...subcommand.args,
+            args: subcommand_args,
+        });
+    } catch (e) {
+        stderr(produce_usage_string(subcommand));
+        puter.exit(1);
+        return;
+    }
+
+    const ctx = {
+        io: {
+            stdout,
+            stderr,
+        },
+        fs,
+        args: {
+            options: parsed_args.values,
+            positionals: parsed_args.positionals,
+        },
+        env,
+    };
+
+    try {
+        exit_code = await subcommand.execute(ctx) ?? 0;
+    } catch (e) {
+        if (e === SHOW_USAGE) {
+            stderr(produce_usage_string(subcommand));
+        } else {
+            stderr(`fatal: ${e.message}`);
+            console.error(e);
+        }
+        exit_code = 1;
+    }
+
+    // TODO: Support passing an exit code to puter.exit();
+    puter.exit(exit_code);
+}

packages/git/src/subcommands/__exports__.js

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Phoenix Shell.
+ *
+ * Phoenix Shell is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+// Generated by /tools/gen.js
+import module_add from './add.js'
+import module_commit from './commit.js'
+import module_config from './config.js'
+import module_help from './help.js'
+import module_init from './init.js'
+import module_log from './log.js'
+import module_show from './show.js'
+import module_status from './status.js'
+import module_version from './version.js'
+
+export default {
+    "add": module_add,
+    "commit": module_commit,
+    "config": module_config,
+    "help": module_help,
+    "init": module_init,
+    "log": module_log,
+    "show": module_show,
+    "status": module_status,
+    "version": module_version,
+};

packages/git/src/subcommands/add.js

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import git from 'isomorphic-git';
+import path from 'path-browserify';
+import { ErrorCodes } from '@heyputer/puter-js-common/src/PosixError.js';
+import { find_repo_root } from '../git-helpers.js';
+
+export default {
+    name: 'add',
+    usage: 'git add [--] [<pathspec>...]',
+    description: 'Add file contents to the index.',
+    args: {
+        allowPositionals: true,
+        options: {
+        },
+    },
+    execute: async (ctx) => {
+        const { io, fs, env, args } = ctx;
+        const { stdout, stderr } = io;
+        const { options, positionals } = args;
+
+        const pathspecs = [...positionals];
+        if (pathspecs.length === 0) {
+            stdout('Nothing specified, nothing added.');
+            return;
+        }
+
+        const { repository_dir, git_dir } = await find_repo_root(fs, env.PWD);
+
+        await git.add({
+            fs,
+            dir: repository_dir,
+            gitdir: git_dir,
+            ignored: false,
+            filepath: pathspecs,
+            parallel: true,
+        });
+    }
+}

packages/git/src/subcommands/commit.js

@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import git from 'isomorphic-git';
+import path from 'path-browserify';
+import { ErrorCodes } from '@heyputer/puter-js-common/src/PosixError.js';
+import { find_repo_root, shorten_hash } from '../git-helpers.js';
+
+export default {
+    name: 'commit',
+    usage: 'git commit [-m|--message <message>] [-a|--author <author>]',
+    description: 'Commit staged changes to the repository.',
+    args: {
+        allowPositionals: false,
+        options: {
+            message: {
+                description: 'Specify the commit message',
+                type: 'string',
+                short: 'm',
+            },
+            author: {
+                description: 'Specify the commit author, as `A U Thor <author@example.com>`',
+                type: 'string',
+            },
+        },
+    },
+    execute: async (ctx) => {
+        const { io, fs, env, args } = ctx;
+        const { stdout, stderr } = io;
+        const { options, positionals } = args;
+
+        if (!options.message) {
+            // TODO: Support opening a temporary file in an editor,
+            //  where the user can edit the commit message if it's not specified.
+            stderr('You must specify a commit message with --message or -m');
+            return 1;
+        }
+
+        const { repository_dir, git_dir } = await find_repo_root(fs, env.PWD);
+
+        let user_name;
+        let user_email;
+
+        if (options.author) {
+            const author_regex = /(.+?)\s+<(.+)>/;
+            const matches = options.author.match(author_regex);
+            if (!matches)
+                throw new Error('Failed to parse author string');
+            user_name = matches[1];
+            user_email = matches[2];
+        } else {
+            user_name = await git.getConfig({
+                fs,
+                dir: repository_dir,
+                gitdir: git_dir,
+                path: 'user.name',
+            });
+            user_email = await git.getConfig({
+                fs,
+                dir: repository_dir,
+                gitdir: git_dir,
+                path: 'user.email',
+            });
+        }
+
+        if (!user_name || !user_email) {
+            throw new Error('Missing author information. Either provide --author="A <a@b.c>" or set user.name and user.email in the git config');
+        }
+
+        const commit_hash = await git.commit({
+            fs,
+            dir: repository_dir,
+            gitdir: git_dir,
+            message: options.message,
+            author: {
+                name: user_name,
+                email: user_email,
+            },
+        });
+
+        const branch = await git.currentBranch({
+            fs,
+            dir: repository_dir,
+            gitdir: git_dir,
+        });
+        const commit_title = options.message.split('\n')[0];
+        const short_hash = shorten_hash(commit_hash);
+        let output = `[${branch} ${short_hash}] ${commit_title}\n`;
+        // TODO: --amend prints out the date of the original commit here, as:
+        //  ` Date: Fri May 17 15:45:47 2024 +0100`
+        // TODO: Print out file change count, insertion count, and deletion count
+        //  (Seems if insertions and deletions are both 0, we should print both.
+        //   Otherwise we just print nonzero ones.)
+        // TODO: Print out each file created or deleted. eg:
+        //  create mode 100644 bar
+        //  delete mode 100644 foo.txt
+        stdout(output);
+    }
+}

packages/git/src/subcommands/config.js

@@ -0,0 +1,77 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import git from 'isomorphic-git';
+import { find_repo_root } from '../git-helpers.js';
+import { SHOW_USAGE } from '../help.js';
+
+export default {
+    name: 'config',
+    usage: ['git config name', 'git config name value', 'git config --unset name'],
+    description: 'Get or set git configuration options.',
+    args: {
+        allowPositionals: true,
+        options: {
+            'unset': {
+                description: 'Remove the matching line from the config.',
+                type: 'boolean',
+            },
+            // TODO: --list, which doesn't have a isomorphic-git command yet.
+            //  See https://github.com/isomorphic-git/isomorphic-git/issues/1917
+        },
+    },
+    execute: async (ctx) => {
+        const { io, fs, env, args } = ctx;
+        const { stdout, stderr } = io;
+        const { options, positionals } = args;
+
+        if (positionals.length === 0 || positionals.length > 2)
+            throw SHOW_USAGE;
+
+        const key = positionals.shift();
+        const value = positionals.shift();
+
+        const { repository_dir, git_dir } = await find_repo_root(fs, env.PWD);
+
+        if (value || options.unset) {
+            // Set it
+            // TODO: If --unset AND we have a value, we should only remove an entry that has that value
+            await git.setConfig({
+                fs,
+                dir: repository_dir,
+                gitdir: git_dir,
+                path: key,
+                value: options.unset ? undefined : value,
+            });
+            return;
+        }
+
+        // Get it
+        const result = await git.getConfig({
+            fs,
+            dir: repository_dir,
+            gitdir: git_dir,
+            path: key,
+        });
+        if (result === undefined) {
+            // Not found, so return 1
+            return 1;
+        }
+        stdout(result);
+    }
+}

packages/git/src/subcommands/help.js

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import git from 'isomorphic-git';
+import { ErrorCodes } from '@heyputer/puter-js-common/src/PosixError.js';
+import subcommands from './__exports__.js';
+import git_command from '../git-command-definition.js';
+import { produce_help_string } from '../help.js';
+
+export default {
+    name: 'help',
+    usage: ['git help [-a|--all]', 'git help <command>'],
+    description: `Display help information for git itself, or a subcommand.`,
+    args: {
+        allowPositionals: true,
+        options: {
+            all: {
+                description: 'List all available subcommands.',
+                type: 'boolean',
+            }
+        },
+    },
+    execute: async (ctx) => {
+        const { io, fs, env, args } = ctx;
+        const { stdout, stderr } = io;
+        const { options, positionals } = args;
+
+        if (options.all) {
+            stdout(`See 'git help <command>' for more information.\n`);
+            const max_name_length = Object.keys(subcommands).reduce((max, name) => Math.max(max, name.length), 0);
+            for (const [name, command] of Object.entries(subcommands)) {
+                stdout(`    ${name} ${' '.repeat(Math.max(max_name_length - name.length, 0))} ${command.description || ''}`);
+            }
+            return;
+        }
+
+        if (positionals.length > 0) {
+            // Try and display help page for the subcommand
+            const subcommand_name = positionals[0];
+            const subcommand = subcommands[subcommand_name];
+            if (!subcommand)
+                throw new Error(`No manual entry for ${subcommand_name}`);
+
+            stdout(produce_help_string(subcommand));
+
+            return;
+        }
+
+        // No subcommand name, so show general help
+        stdout(produce_help_string(git_command));
+    }
+}

packages/git/src/subcommands/init.js

@@ -0,0 +1,97 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import git from 'isomorphic-git';
+import path from 'path-browserify';
+import { ErrorCodes } from '@heyputer/puter-js-common/src/PosixError.js';
+
+export default {
+    name: 'init',
+    usage: 'git init [--bare] [--initial-branch=BRANCH] [--separate-git-dir=DIR]',
+    description: `Initialize or re-initialize a git repository.`,
+    args: {
+        allowPositionals: true,
+        options: {
+            'bare': {
+                description: 'Create a bare repository',
+                type: 'boolean',
+                default: false,
+            },
+            'initial-branch': {
+                description: 'Name of the initial branch',
+                type: 'string',
+                short: 'b',
+            },
+            'separate-git-dir': {
+                description: 'Name of directory to store the git repository, instead of ./.git/',
+                type: 'string',
+                default: './.git',
+            },
+        },
+    },
+    execute: async (ctx) => {
+        const { io, fs, env, args } = ctx;
+        const { stdout, stderr } = io;
+        const { options, positionals } = args;
+
+        const [ directory, ...extra_positionals ] = positionals ?? [];
+        if (extra_positionals.length) {
+            stderr('Too many parameters');
+            return 1;
+        }
+
+        const dir = directory ? path.resolve(env.PWD, directory) : env.PWD;
+        const gitdir = path.resolve(dir, options['separate-git-dir']);
+        const dot_git_path = path.resolve(dir, './.git');
+
+        // Check if repo already initialized
+        let repo_exists = false;
+        try {
+            const stat = await fs.promises.stat(dot_git_path);
+            repo_exists = true;
+        } catch (e) {
+            if (e.posixCode === ErrorCodes.ENOENT) {
+                repo_exists = false;
+            }
+        }
+
+        if (repo_exists) {
+            // TODO: `git init` in an existing repo re-initializes it without erasing anything.
+            //  If the git dir provided is different than the existing one, it moves the contents to the new location.
+            //  isomorphic-git does not seem to do this, and it's an unusual case, so for now we just prevent `git init`
+            //  for existing repos.
+            stderr('Git repository already initialized');
+            return 1;
+        }
+
+        await git.init({
+            fs,
+            bare: options.bare,
+            dir,
+            gitdir,
+            defaultBranch: options['initial-branch'],
+        }).then(() => {
+            // If we're using a different git dir, create a .git file pointing to it
+            if (gitdir !== dot_git_path) {
+                return fs.promises.writeFile(dot_git_path, `gitdir: ${gitdir}\n`, { encoding: 'utf8' });
+            }
+        });
+
+        stdout(`Initialized empty git repository in ${gitdir}`);
+    }
+}

packages/git/src/subcommands/log.js

@@ -0,0 +1,64 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import git from 'isomorphic-git';
+import { find_repo_root } from '../git-helpers.js';
+import { commit_formatting_options, format_commit, process_commit_formatting_options } from '../format.js';
+
+export default {
+    name: 'log',
+    usage: 'git log [<formatting-option>...] [--max-count <n>] <revision>',
+    description: 'Show commit logs, starting at the given revision.',
+    args: {
+        allowPositionals: false,
+        options: {
+            ...commit_formatting_options,
+            'max-count': {
+                description: 'Maximum number of commits to output.',
+                type: 'string',
+                short: 'n',
+            },
+        },
+    },
+    execute: async (ctx) => {
+        const { io, fs, env, args } = ctx;
+        const { stdout, stderr } = io;
+        const { options, positionals } = args;
+
+        process_commit_formatting_options(options);
+
+        // TODO: Log of a specific file
+        // TODO: Log of a specific branch
+        // TODO: Log of a specific commit
+
+        const depth = Number(options['max-count']) || undefined;
+
+        const { repository_dir, git_dir } = await find_repo_root(fs, env.PWD);
+
+        const log = await git.log({
+            fs,
+            dir: repository_dir,
+            gitdir: git_dir,
+            depth,
+        });
+
+        for (const commit of log) {
+            stdout(format_commit(commit.commit, commit.oid, options));
+        }
+    }
+}

packages/git/src/subcommands/show.js

@@ -0,0 +1,96 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import git from 'isomorphic-git';
+import { find_repo_root } from '../git-helpers.js';
+import { commit_formatting_options, process_commit_formatting_options, format_commit, format_tag, format_tree } from '../format.js';
+
+export default {
+    name: 'show',
+    usage: 'git show [<formatting-option>...] <object>',
+    description: 'Show information about an object (commit, tree, tag, blob, etc.) in git.',
+    args: {
+        allowPositionals: true,
+        options: {
+            ...commit_formatting_options,
+        },
+    },
+    execute: async (ctx) => {
+        const { io, fs, env, args } = ctx;
+        const { stdout, stderr } = io;
+        const { options, positionals } = args;
+
+        process_commit_formatting_options(options);
+
+        const { repository_dir, git_dir } = await find_repo_root(fs, env.PWD);
+
+        const objects = [...positionals];
+
+        const cache = {};
+
+        const format_object = async (parsed_object, options) => {
+            switch (parsed_object.type) {
+                case 'blob':
+                    return parsed_object.object;
+                case 'commit':
+                    return format_commit(parsed_object.object, parsed_object.oid, options);
+                case 'tree':
+                    return format_tree(parsed_object.oid, parsed_object.object, options);
+                case 'tag': {
+                    const tag = parsed_object.object;
+                    let s = format_tag(tag, options);
+                    // Formatting a tag also outputs the formatted object it points to.
+                    // That may also be a tag, so we recurse.
+                    const target = await git.readObject({
+                        fs,
+                        dir: repository_dir,
+                        gitdir: git_dir,
+                        oid: tag.object,
+                        format: 'parsed',
+                        cache,
+                    });
+                    s += await format_object(target, options);
+                    return s;
+                }
+            }
+        }
+
+        for (const ref of objects) {
+            // Could be any ref, so first get the oid that's referred to.
+            const oid = await git.resolveRef({
+                fs,
+                dir: repository_dir,
+                gitdir: git_dir,
+                ref,
+            });
+
+            // Then obtain the object and parse it.
+            const parsed_object = await git.readObject({
+                fs,
+                dir: repository_dir,
+                gitdir: git_dir,
+                oid,
+                format: 'parsed',
+                cache,
+            });
+
+            // Then, print it out
+            stdout(await format_object(parsed_object, options));
+        }
+    }
+}

packages/git/src/subcommands/status.js

@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import git from 'isomorphic-git';
+import path from 'path-browserify';
+import { ErrorCodes } from '@heyputer/puter-js-common/src/PosixError.js';
+import { find_repo_root } from '../git-helpers.js';
+
+export default {
+    name: 'status',
+    usage: 'git status',
+    description: 'Describe the status of the git working tree.',
+    args: {
+        allowPositionals: false,
+        options: {
+        },
+    },
+    execute: async (ctx) => {
+        const { io, fs, env, args } = ctx;
+        const { stdout, stderr } = io;
+        const { options, positionals } = args;
+
+        const { repository_dir, git_dir } = await find_repo_root(fs, env.PWD);
+
+        // Gather up file differences
+        const file_status = await git.statusMatrix({
+            fs,
+            dir: repository_dir,
+            gitdir: git_dir,
+            ignored: false,
+        });
+
+        const staged = [];
+        const unstaged = [];
+        const untracked = [];
+
+        const HEAD = 1;
+        const WORKDIR = 2;
+        const STAGE = 3;
+
+        for (const file of file_status) {
+            const absolute_path = path.resolve(repository_dir, file[0]);
+            const relative_path = path.relative(env.PWD, absolute_path);
+
+            const status_string = `${file[1]}${file[2]}${file[3]}`;
+            switch (status_string) {
+                case '020': // new, untracked
+                    untracked.push(relative_path);
+                    break;
+                case '022': // added, staged
+                    staged.push([relative_path, 'added']);
+                    break;
+                case '023': // added, staged, with unstaged changes
+                    staged.push([relative_path, 'added']);
+                    unstaged.push([relative_path, 'modified']);
+                    break;
+                case '111': // unmodified
+                    // Ignore it
+                    break;
+                case '121': // modified, unstaged
+                    unstaged.push([relative_path, 'modified']);
+                    break;
+                case '122': // modified, staged
+                    staged.push([relative_path, 'modified']);
+                    break;
+                case '123': // modified, staged, with unstaged changes
+                    staged.push([relative_path, 'modified']);
+                    unstaged.push([relative_path, 'modified']);
+                    break;
+                case '101': // deleted, unstaged
+                    unstaged.push([relative_path, 'deleted']);
+                    break;
+                case '100': // deleted, staged
+                    staged.push([relative_path, 'deleted']);
+                    break;
+                case '120': // deleted, staged, with unstaged-modified changes (new file of the same name)
+                case '110': // deleted, staged, with unstaged changes (new file of the same name)
+                    staged.push([relative_path, 'deleted']);
+                    unstaged.push([relative_path, 'added']);
+                    break;
+            }
+        }
+
+        // TODO: Short-format output
+
+        const padding = (length) => {
+            if (length <= 0) return '';
+            return ' '.repeat(length);
+        }
+
+        const current_branch = await git.currentBranch({
+            fs,
+            dir: repository_dir,
+            gitdir: git_dir,
+        });
+        stdout(`On branch ${current_branch}\n`);
+
+        if (staged.length) {
+            stdout('Changes to be committed:');
+            for (const [file, change] of staged) {
+                stdout(`        ${change}: ${padding(10 - change.length)}${file}`);
+            }
+            stdout('');
+        }
+
+        if (unstaged.length) {
+            stdout('Changes not staged for commit:');
+            for (const [file, change] of unstaged) {
+                stdout(`        ${change}: ${padding(10 - change.length)}${file}`);
+            }
+            stdout('');
+        }
+
+        if (untracked.length) {
+            stdout('Untracked files:');
+            // TODO: Native git is smart enough to only list a top-level directory if all its contents are untracked
+            for (const file of untracked) {
+                stdout(`        ${file}`);
+            }
+        }
+
+        if (staged.length + unstaged.length + untracked.length === 0) {
+            stdout('nothing to commit, working tree clean');
+        }
+    }
+}

packages/git/src/subcommands/version.js

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter's Git client.
+ *
+ * Puter's Git client is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+import git from 'isomorphic-git';
+import path from 'path-browserify';
+import { ErrorCodes } from '@heyputer/puter-js-common/src/PosixError.js';
+
+const VERSION = '1.0.0';
+
+export default {
+    name: 'version',
+    usage: 'git version',
+    description: `Display version information about git.`,
+    args: {
+        allowPositionals: false,
+        options: {},
+    },
+    execute: async (ctx) => {
+        const { io, fs, env, args } = ctx;
+        const { stdout, stderr } = io;
+        const { options, positionals } = args;
+
+        stdout(`Puter git version ${VERSION} (isomorphic git version ${git.version()})`);
+    }
+}

packages/phoenix/src/platform/PosixError.js

@@ -1,143 +0,0 @@
-/*
- * Copyright (C) 2024  Puter Technologies Inc.
- *
- * This file is part of Phoenix Shell.
- *
- * Phoenix Shell is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as published
- * by the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-export const ErrorCodes = {
-    EACCES: Symbol.for('EACCES'),
-    EADDRINUSE: Symbol.for('EADDRINUSE'),
-    ECONNREFUSED: Symbol.for('ECONNREFUSED'),
-    ECONNRESET: Symbol.for('ECONNRESET'),
-    EEXIST: Symbol.for('EEXIST'),
-    EFBIG: Symbol.for('EFBIG'),
-    EINVAL: Symbol.for('EINVAL'),
-    EIO: Symbol.for('EIO'),
-    EISDIR: Symbol.for('EISDIR'),
-    EMFILE: Symbol.for('EMFILE'),
-    ENOENT: Symbol.for('ENOENT'),
-    ENOSPC: Symbol.for('ENOSPC'),
-    ENOTDIR: Symbol.for('ENOTDIR'),
-    ENOTEMPTY: Symbol.for('ENOTEMPTY'),
-    EPERM: Symbol.for('EPERM'),
-    EPIPE: Symbol.for('EPIPE'),
-    ETIMEDOUT: Symbol.for('ETIMEDOUT'),
-};
-
-// Codes taken from `errno` on Linux.
-export const ErrorMetadata = new Map([
-    [ErrorCodes.EPERM, { code: 1, description: 'Operation not permitted' }],
-    [ErrorCodes.ENOENT, { code: 2, description: 'File or directory not found' }],
-    [ErrorCodes.EIO, { code: 5, description: 'IO error' }],
-    [ErrorCodes.EACCES, { code: 13, description: 'Permission denied' }],
-    [ErrorCodes.EEXIST, { code: 17, description: 'File already exists' }],
-    [ErrorCodes.ENOTDIR, { code: 20, description: 'Is not a directory' }],
-    [ErrorCodes.EISDIR, { code: 21, description: 'Is a directory' }],
-    [ErrorCodes.EINVAL, { code: 22, description: 'Argument invalid' }],
-    [ErrorCodes.EMFILE, { code: 24, description: 'Too many open files' }],
-    [ErrorCodes.EFBIG, { code: 27, description: 'File too big' }],
-    [ErrorCodes.ENOSPC, { code: 28, description: 'Device out of space' }],
-    [ErrorCodes.EPIPE, { code: 32, description: 'Pipe broken' }],
-    [ErrorCodes.ENOTEMPTY, { code: 39, description: 'Directory is not empty' }],
-    [ErrorCodes.EADDRINUSE, { code: 98, description: 'Address already in use' }],
-    [ErrorCodes.ECONNRESET, { code: 104, description: 'Connection reset'}],
-    [ErrorCodes.ETIMEDOUT, { code: 110, description: 'Connection timed out' }],
-    [ErrorCodes.ECONNREFUSED, { code: 111, description: 'Connection refused' }],
-]);
-
-export const errorFromIntegerCode = (code) => {
-    for (const [errorCode, metadata] of ErrorMetadata) {
-        if (metadata.code === code) {
-            return errorCode;
-        }
-    }
-    return undefined;
-};
-
-export class PosixError extends Error {
-    // posixErrorCode can be either a string, or one of the ErrorCodes above.
-    // If message is undefined, a default message will be used.
-    constructor(posixErrorCode, message) {
-        let posixCode;
-        if (typeof posixErrorCode === 'symbol') {
-            if (ErrorCodes[Symbol.keyFor(posixErrorCode)] !== posixErrorCode) {
-                throw new Error(`Unrecognized POSIX error code: '${posixErrorCode}'`);
-            }
-            posixCode = posixErrorCode;
-        } else {
-            const code = ErrorCodes[posixErrorCode];
-            if (!code) throw new Error(`Unrecognized POSIX error code: '${posixErrorCode}'`);
-            posixCode = code;
-        }
-
-        super(message ?? ErrorMetadata.get(posixCode).description);
-        this.posixCode = posixCode;
-    }
-
-    //
-    // Helpers for constructing a PosixError when you don't already have an error message.
-    //
-    static AccessNotPermitted({ message, path } = {}) {
-        return new PosixError(ErrorCodes.EACCES, message ?? (path ? `Access not permitted to: '${path}'` : undefined));
-    }
-    static AddressInUse({ message, address } = {}) {
-        return new PosixError(ErrorCodes.EADDRINUSE, message ?? (address ? `Address '${address}' in use` : undefined));
-    }
-    static ConnectionRefused({ message } = {}) {
-        return new PosixError(ErrorCodes.ECONNREFUSED, message);
-    }
-    static ConnectionReset({ message } = {}) {
-        return new PosixError(ErrorCodes.ECONNRESET, message);
-    }
-    static PathAlreadyExists({ message, path } = {}) {
-        return new PosixError(ErrorCodes.EEXIST, message ?? (path ? `Path already exists: '${path}'` : undefined));
-    }
-    static FileTooLarge({ message } = {}) {
-        return new PosixError(ErrorCodes.EFBIG, message);
-    }
-    static InvalidArgument({ message } = {}) {
-        return new PosixError(ErrorCodes.EINVAL, message);
-    }
-    static IO({ message } = {}) {
-        return new PosixError(ErrorCodes.EIO, message);
-    }
-    static IsDirectory({ message, path } = {}) {
-        return new PosixError(ErrorCodes.EISDIR, message ?? (path ? `Path is directory: '${path}'` : undefined));
-    }
-    static TooManyOpenFiles({ message } = {}) {
-        return new PosixError(ErrorCodes.EMFILE, message);
-    }
-    static DoesNotExist({ message, path } = {}) {
-        return new PosixError(ErrorCodes.ENOENT, message ?? (path ? `Path not found: '${path}'` : undefined));
-    }
-    static NotEnoughSpace({ message } = {}) {
-        return new PosixError(ErrorCodes.ENOSPC, message);
-    }
-    static IsNotDirectory({ message, path } = {}) {
-        return new PosixError(ErrorCodes.ENOTDIR, message ?? (path ? `Path is not a directory: '${path}'` : undefined));
-    }
-    static DirectoryIsNotEmpty({ message, path } = {}) {
-        return new PosixError(ErrorCodes.ENOTEMPTY,  message ?? (path ?`Directory is not empty: '${path}'` : undefined));
-    }
-    static OperationNotPermitted({ message } = {}) {
-        return new PosixError(ErrorCodes.EPERM, message);
-    }
-    static BrokenPipe({ message } = {}) {
-        return new PosixError(ErrorCodes.EPIPE, message);
-    }
-    static TimedOut({ message } = {}) {
-        return new PosixError(ErrorCodes.ETIMEDOUT, message);
-    }
-}

packages/phoenix/src/platform/node/filesystem.js

@@ -20,30 +20,7 @@ import fs from 'fs';
 import path_ from 'path';
 
 import modeString from 'fs-mode-to-string';
-import { ErrorCodes, PosixError } from '../PosixError.js';
+import { ErrorCodes, PosixError } from '@heyputer/puter-js-common/src/PosixError.js';
-
-function convertNodeError(e) {
-    switch (e.code) {
-        case 'EACCES': return new PosixError(ErrorCodes.EACCES, e.message);
-        case 'EADDRINUSE': return new PosixError(ErrorCodes.EADDRINUSE, e.message);
-        case 'ECONNREFUSED': return new PosixError(ErrorCodes.ECONNREFUSED, e.message);
-        case 'ECONNRESET': return new PosixError(ErrorCodes.ECONNRESET, e.message);
-        case 'EEXIST': return new PosixError(ErrorCodes.EEXIST, e.message);
-        case 'EIO': return new PosixError(ErrorCodes.EIO, e.message);
-        case 'EISDIR': return new PosixError(ErrorCodes.EISDIR, e.message);
-        case 'EMFILE': return new PosixError(ErrorCodes.EMFILE, e.message);
-        case 'ENOENT': return new PosixError(ErrorCodes.ENOENT, e.message);
-        case 'ENOTDIR': return new PosixError(ErrorCodes.ENOTDIR, e.message);
-        case 'ENOTEMPTY': return new PosixError(ErrorCodes.ENOTEMPTY, e.message);
-        // ENOTFOUND is Node-specific. ECONNREFUSED is similar enough.
-        case 'ENOTFOUND': return new PosixError(ErrorCodes.ECONNREFUSED, e.message);
-        case 'EPERM': return new PosixError(ErrorCodes.EPERM, e.message);
-        case 'EPIPE': return new PosixError(ErrorCodes.EPIPE, e.message);
-        case 'ETIMEDOUT': return new PosixError(ErrorCodes.ETIMEDOUT, e.message);
-    }
-    // Some other kind of error
-    return e;
-}
 
 // DRY: Almost the same as puter/filesystem.js
 function wrapAPIs(apis) {
@@ -56,7 +33,7 @@ function wrapAPIs(apis) {
             try {
                 return await original(...args);
             } catch (e) {
-                throw convertNodeError(e);
+                throw PosixError.fromNodeJSError(e);
             }
         };
     }

packages/phoenix/src/platform/puter/filesystem.js

@@ -16,107 +16,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-import { ErrorCodes, PosixError } from '../PosixError.js';
+import { ErrorCodes, PosixError } from '@heyputer/puter-js-common/src/PosixError.js';
-
-function convertPuterError(e) {
-    // Handle Puter SDK errors
-    switch (e.code) {
-        case 'item_with_same_name_exists': return new PosixError(ErrorCodes.EEXIST, e.message);
-        case 'cannot_move_item_into_itself': return new PosixError(ErrorCodes.EPERM, e.message);
-        case 'cannot_copy_item_into_itself': return new PosixError(ErrorCodes.EPERM, e.message);
-        case 'cannot_move_to_root': return new PosixError(ErrorCodes.EACCES, e.message);
-        case 'cannot_copy_to_root': return new PosixError(ErrorCodes.EACCES, e.message);
-        case 'cannot_write_to_root': return new PosixError(ErrorCodes.EACCES, e.message);
-        case 'cannot_overwrite_a_directory': return new PosixError(ErrorCodes.EPERM, e.message);
-        case 'cannot_read_a_directory': return new PosixError(ErrorCodes.EISDIR, e.message);
-        case 'source_and_dest_are_the_same': return new PosixError(ErrorCodes.EPERM, e.message);
-        case 'dest_is_not_a_directory': return new PosixError(ErrorCodes.ENOTDIR, e.message);
-        case 'dest_does_not_exist': return new PosixError(ErrorCodes.ENOENT, e.message);
-        case 'source_does_not_exist': return new PosixError(ErrorCodes.ENOENT, e.message);
-        case 'subject_does_not_exist': return new PosixError(ErrorCodes.ENOENT, e.message);
-        case 'shortcut_target_not_found': return new PosixError(ErrorCodes.ENOENT, e.message);
-        case 'shortcut_target_is_a_directory': return new PosixError(ErrorCodes.EISDIR, e.message);
-        case 'shortcut_target_is_a_file': return new PosixError(ErrorCodes.ENOTDIR, e.message);
-        case 'forbidden': return new PosixError(ErrorCodes.EPERM, e.message);
-        case 'immutable': return new PosixError(ErrorCodes.EACCES, e.message);
-        case 'field_empty': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'field_missing': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'xor_field_missing': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'field_only_valid_with_other_field': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'invalid_id': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'field_invalid': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'field_immutable': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'field_too_long': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'field_too_short': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'already_in_use': return new PosixError(ErrorCodes.EINVAL, e.message); // Not sure what this one is
-        case 'invalid_file_name': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'storage_limit_reached': return new PosixError(ErrorCodes.ENOSPC, e.message);
-        case 'internal_error': return new PosixError(ErrorCodes.ECONNRESET, e.message); // This isn't quite right
-        case 'response_timeout': return new PosixError(ErrorCodes.ETIMEDOUT, e.message);
-        case 'file_too_large': return new PosixError(ErrorCodes.EFBIG, e.message);
-        case 'thumbnail_too_large': return new PosixError(ErrorCodes.EFBIG, e.message);
-        case 'upload_failed': return new PosixError(ErrorCodes.ECONNRESET, e.message); // This isn't quite right
-        case 'missing_expected_metadata': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'overwrite_and_dedupe_exclusive': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'not_empty': return new PosixError(ErrorCodes.ENOTEMPTY, e.message);
-
-        // Write
-        case 'offset_without_existing_file': return new PosixError(ErrorCodes.ENOENT, e.message);
-        case 'offset_requires_overwrite': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'offset_requires_stream': return new PosixError(ErrorCodes.EPERM, e.message);
-
-        // Batch
-        case 'batch_too_many_files': return new PosixError(ErrorCodes.EINVAL, e.message);
-        case 'batch_missing_file': return new PosixError(ErrorCodes.EINVAL, e.message);
-
-        // Open
-        case 'no_suitable_app': break;
-        case 'app_does_not_exist': break;
-
-        // Apps
-        case 'app_name_already_in_use': break;
-
-        // Subdomains
-        case 'subdomain_limit_reached': break;
-        case 'subdomain_reserved': break;
-
-        // Users
-        case 'email_already_in_use': break;
-        case 'username_already_in_use': break;
-        case 'too_many_username_changes': break;
-        case 'token_invalid': break;
-
-        // drivers
-        case 'interface_not_found': break;
-        case 'no_implementation_available': break;
-        case 'method_not_found': break;
-        case 'missing_required_argument': break;
-        case 'argument_consolidation_failed': break;
-
-        // SLA
-        case 'rate_limit_exceeded': break;
-        case 'monthly_limit_exceeded': break;
-        case 'server_rate_exceeded': break;
-
-        // auth
-        case 'token_missing': break;
-        case 'token_auth_failed': break;
-        case 'token_unsupported': break;
-        case 'account_suspended': break;
-        case 'permission_denied': break;
-        case 'access_token_empty_permissions': break;
-
-        // Object Mapping
-        case 'field_not_allowed_for_create': break;
-        case 'field_required_for_update': break;
-        case 'entity_not_found': break;
-
-        // Chat
-        case 'max_tokens_exceeded': break;
-    }
-    // Some other kind of error
-    return e;
-}
 
 // DRY: Almost the same as node/filesystem.js
 function wrapAPIs(apis) {
@@ -129,7 +29,7 @@ function wrapAPIs(apis) {
             try {
                 return await original(...args);
             } catch (e) {
-                throw convertPuterError(e);
+                throw PosixError.fromPuterAPIError(e);
             }
         };
     }

packages/phoenix/src/puter-shell/coreutils/errno.js

@@ -16,7 +16,7 @@
  * You should have received a copy of the GNU Affero General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
-import { ErrorCodes, ErrorMetadata, errorFromIntegerCode } from '../../platform/PosixError.js';
+import { ErrorCodes, ErrorMetadata, errorFromIntegerCode } from '@heyputer/puter-js-common/src/PosixError.js';
 import { Exit } from './coreutil_lib/exit.js';
 
 const maxErrorNameLength = Object.keys(ErrorCodes)

packages/phoenix/src/puter-shell/coreutils/touch.js

@@ -18,7 +18,7 @@
  */
 import { Exit } from './coreutil_lib/exit.js';
 import { resolveRelativePath } from '../../util/path.js';
-import { ErrorCodes } from '../../platform/PosixError.js';
+import { ErrorCodes } from '@heyputer/puter-js-common/src/PosixError.js';
 
 export default {
     name: 'touch',

packages/phoenix/src/puter-shell/providers/PathCommandProvider.js

@@ -83,7 +83,6 @@ function spawn_process(ctx, executablePath) {
     // Repeatedly copy data from stdin to the child, while it's running.
     let data, done;
     const next_data = async () => {
-        // FIXME: This waits for one more read() after we finish.
         ({ value: data, done } = await Promise.race([
             exit_promise, sigint_promise, ctx.externs.in_.read(),
         ]));
@@ -135,7 +134,6 @@ function spawn_pty(ctx, executablePath) {
     // Repeatedly copy data from stdin to the child, while it's running.
     let data, done;
     const next_data = async () => {
-        // FIXME: This waits for one more read() after we finish.
         ({ value: data, done } = await Promise.race([
             exit_promise, sigint_promise, ctx.externs.in_.read(),
         ]));

packages/phoenix/src/puter-shell/providers/PuterAppCommandProvider.js

@@ -50,9 +50,14 @@ export class PuterAppCommandProvider {
         return {
             name: id,
             path: path ?? 'Built-in Puter app',
-            // TODO: Parameters and options?
+            // TODO: Let apps expose option/positional definitions like builtins do, and parse them here?
             async execute(ctx) {
-                const args = {}; // TODO: Passed-in parameters and options would go here
+                const args = {
+                    command_line: {
+                        args: ctx.locals.args,
+                    },
+                    env: {...ctx.env},
+                };
                 const child = await puter.ui.launchApp(id, args);
 
                 // Wait for app to close.
@@ -86,7 +91,6 @@ export class PuterAppCommandProvider {
                     // DRY: Initially copied from PathCommandProvider
                     let data, done;
                     const next_data = async () => {
-                        // FIXME: This waits for one more read() after we finish.
                         ({ value: data, done } = await Promise.race([
                             app_close_promise, sigint_promise, ctx.externs.in_.read(),
                         ]));

packages/phoenix/test/coreutils/errno.js

@@ -19,7 +19,7 @@
 import assert from 'assert';
 import { MakeTestContext } from './harness.js'
 import builtins from '../../src/puter-shell/coreutils/__exports__.js';
-import { ErrorCodes, ErrorMetadata } from '../../src/platform/PosixError.js';
+import { ErrorCodes, ErrorMetadata } from '@heyputer/puter-js-common/src/PosixError.js';
 
 export const runErrnoTests = () => {
     describe('errno', function () {
@@ -100,7 +100,8 @@ export const runErrnoTests = () => {
                     'EADDRINUSE    98 Address already in use\n' +
                     'ECONNRESET   104 Connection reset\n' +
                     'ETIMEDOUT    110 Connection timed out\n' +
-                    'ECONNREFUSED 111 Connection refused\n',
+                    'ECONNREFUSED 111 Connection refused\n' +
+                    'EUNKNOWN      -1 Unknown error\n',
                 expectedStderr: '',
                 expectedFail: false,
             },

packages/puter-js-common/src/PosixError.js

@@ -0,0 +1,281 @@
+/*
+ * Copyright (C) 2024  Puter Technologies Inc.
+ *
+ * This file is part of Puter.
+ *
+ * Puter is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+const ErrorCodes = {
+    EACCES: Symbol.for('EACCES'),
+    EADDRINUSE: Symbol.for('EADDRINUSE'),
+    ECONNREFUSED: Symbol.for('ECONNREFUSED'),
+    ECONNRESET: Symbol.for('ECONNRESET'),
+    EEXIST: Symbol.for('EEXIST'),
+    EFBIG: Symbol.for('EFBIG'),
+    EINVAL: Symbol.for('EINVAL'),
+    EIO: Symbol.for('EIO'),
+    EISDIR: Symbol.for('EISDIR'),
+    EMFILE: Symbol.for('EMFILE'),
+    ENOENT: Symbol.for('ENOENT'),
+    ENOSPC: Symbol.for('ENOSPC'),
+    ENOTDIR: Symbol.for('ENOTDIR'),
+    ENOTEMPTY: Symbol.for('ENOTEMPTY'),
+    EPERM: Symbol.for('EPERM'),
+    EPIPE: Symbol.for('EPIPE'),
+    ETIMEDOUT: Symbol.for('ETIMEDOUT'),
+
+    // For when we need to convert errors that we don't recognise
+    EUNKNOWN: Symbol.for('EUNKNOWN'),
+};
+
+// Codes taken from `errno` on Linux.
+const ErrorMetadata = new Map([
+    [ErrorCodes.EPERM, { code: 1, description: 'Operation not permitted' }],
+    [ErrorCodes.ENOENT, { code: 2, description: 'File or directory not found' }],
+    [ErrorCodes.EIO, { code: 5, description: 'IO error' }],
+    [ErrorCodes.EACCES, { code: 13, description: 'Permission denied' }],
+    [ErrorCodes.EEXIST, { code: 17, description: 'File already exists' }],
+    [ErrorCodes.ENOTDIR, { code: 20, description: 'Is not a directory' }],
+    [ErrorCodes.EISDIR, { code: 21, description: 'Is a directory' }],
+    [ErrorCodes.EINVAL, { code: 22, description: 'Argument invalid' }],
+    [ErrorCodes.EMFILE, { code: 24, description: 'Too many open files' }],
+    [ErrorCodes.EFBIG, { code: 27, description: 'File too big' }],
+    [ErrorCodes.ENOSPC, { code: 28, description: 'Device out of space' }],
+    [ErrorCodes.EPIPE, { code: 32, description: 'Pipe broken' }],
+    [ErrorCodes.ENOTEMPTY, { code: 39, description: 'Directory is not empty' }],
+    [ErrorCodes.EADDRINUSE, { code: 98, description: 'Address already in use' }],
+    [ErrorCodes.ECONNRESET, { code: 104, description: 'Connection reset'}],
+    [ErrorCodes.ETIMEDOUT, { code: 110, description: 'Connection timed out' }],
+    [ErrorCodes.ECONNREFUSED, { code: 111, description: 'Connection refused' }],
+
+    [ErrorCodes.EUNKNOWN, { code: -1, description: 'Unknown error' }],
+]);
+
+const errorFromIntegerCode = (code) => {
+    for (const [errorCode, metadata] of ErrorMetadata) {
+        if (metadata.code === code) {
+            return errorCode;
+        }
+    }
+    return undefined;
+};
+
+class PosixError extends Error {
+    // posixErrorCode can be either a string, or one of the ErrorCodes above.
+    // If message is undefined, a default message will be used.
+    constructor(posixErrorCode, message) {
+        let posixCode;
+        if (typeof posixErrorCode === 'symbol') {
+            if (ErrorCodes[Symbol.keyFor(posixErrorCode)] !== posixErrorCode) {
+                throw new Error(`Unrecognized POSIX error code: '${posixErrorCode}'`);
+            }
+            posixCode = posixErrorCode;
+        } else {
+            const code = ErrorCodes[posixErrorCode];
+            if (!code) throw new Error(`Unrecognized POSIX error code: '${posixErrorCode}'`);
+            posixCode = code;
+        }
+
+        super(message ?? ErrorMetadata.get(posixCode).description);
+        this.posixCode = posixCode;
+        this.code = posixCode.description;
+    }
+
+    static fromNodeJSError(e) {
+        switch (e.code) {
+            case 'EACCES': return new PosixError(ErrorCodes.EACCES, e.message);
+            case 'EADDRINUSE': return new PosixError(ErrorCodes.EADDRINUSE, e.message);
+            case 'ECONNREFUSED': return new PosixError(ErrorCodes.ECONNREFUSED, e.message);
+            case 'ECONNRESET': return new PosixError(ErrorCodes.ECONNRESET, e.message);
+            case 'EEXIST': return new PosixError(ErrorCodes.EEXIST, e.message);
+            case 'EIO': return new PosixError(ErrorCodes.EIO, e.message);
+            case 'EISDIR': return new PosixError(ErrorCodes.EISDIR, e.message);
+            case 'EMFILE': return new PosixError(ErrorCodes.EMFILE, e.message);
+            case 'ENOENT': return new PosixError(ErrorCodes.ENOENT, e.message);
+            case 'ENOTDIR': return new PosixError(ErrorCodes.ENOTDIR, e.message);
+            case 'ENOTEMPTY': return new PosixError(ErrorCodes.ENOTEMPTY, e.message);
+            // ENOTFOUND is Node-specific. ECONNREFUSED is similar enough.
+            case 'ENOTFOUND': return new PosixError(ErrorCodes.ECONNREFUSED, e.message);
+            case 'EPERM': return new PosixError(ErrorCodes.EPERM, e.message);
+            case 'EPIPE': return new PosixError(ErrorCodes.EPIPE, e.message);
+            case 'ETIMEDOUT': return new PosixError(ErrorCodes.ETIMEDOUT, e.message);
+        }
+        // Some other kind of error
+        return new PosixError(ErrorCodes.EUNKNOWN, e.message);
+    }
+
+    static fromPuterAPIError(e) {
+        // Handle Puter SDK errors
+        switch (e.code) {
+            case 'item_with_same_name_exists': return new PosixError(ErrorCodes.EEXIST, e.message);
+            case 'cannot_move_item_into_itself': return new PosixError(ErrorCodes.EPERM, e.message);
+            case 'cannot_copy_item_into_itself': return new PosixError(ErrorCodes.EPERM, e.message);
+            case 'cannot_move_to_root': return new PosixError(ErrorCodes.EACCES, e.message);
+            case 'cannot_copy_to_root': return new PosixError(ErrorCodes.EACCES, e.message);
+            case 'cannot_write_to_root': return new PosixError(ErrorCodes.EACCES, e.message);
+            case 'cannot_overwrite_a_directory': return new PosixError(ErrorCodes.EPERM, e.message);
+            case 'cannot_read_a_directory': return new PosixError(ErrorCodes.EISDIR, e.message);
+            case 'source_and_dest_are_the_same': return new PosixError(ErrorCodes.EPERM, e.message);
+            case 'dest_is_not_a_directory': return new PosixError(ErrorCodes.ENOTDIR, e.message);
+            case 'dest_does_not_exist': return new PosixError(ErrorCodes.ENOENT, e.message);
+            case 'source_does_not_exist': return new PosixError(ErrorCodes.ENOENT, e.message);
+            case 'subject_does_not_exist': return new PosixError(ErrorCodes.ENOENT, e.message);
+            case 'shortcut_target_not_found': return new PosixError(ErrorCodes.ENOENT, e.message);
+            case 'shortcut_target_is_a_directory': return new PosixError(ErrorCodes.EISDIR, e.message);
+            case 'shortcut_target_is_a_file': return new PosixError(ErrorCodes.ENOTDIR, e.message);
+            case 'forbidden': return new PosixError(ErrorCodes.EPERM, e.message);
+            case 'immutable': return new PosixError(ErrorCodes.EACCES, e.message);
+            case 'field_empty': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'field_missing': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'xor_field_missing': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'field_only_valid_with_other_field': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'invalid_id': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'field_invalid': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'field_immutable': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'field_too_long': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'field_too_short': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'already_in_use': return new PosixError(ErrorCodes.EINVAL, e.message); // Not sure what this one is
+            case 'invalid_file_name': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'storage_limit_reached': return new PosixError(ErrorCodes.ENOSPC, e.message);
+            case 'internal_error': return new PosixError(ErrorCodes.ECONNRESET, e.message); // This isn't quite right
+            case 'response_timeout': return new PosixError(ErrorCodes.ETIMEDOUT, e.message);
+            case 'file_too_large': return new PosixError(ErrorCodes.EFBIG, e.message);
+            case 'thumbnail_too_large': return new PosixError(ErrorCodes.EFBIG, e.message);
+            case 'upload_failed': return new PosixError(ErrorCodes.ECONNRESET, e.message); // This isn't quite right
+            case 'missing_expected_metadata': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'overwrite_and_dedupe_exclusive': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'not_empty': return new PosixError(ErrorCodes.ENOTEMPTY, e.message);
+
+            // Write
+            case 'offset_without_existing_file': return new PosixError(ErrorCodes.ENOENT, e.message);
+            case 'offset_requires_overwrite': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'offset_requires_stream': return new PosixError(ErrorCodes.EPERM, e.message);
+
+            // Batch
+            case 'batch_too_many_files': return new PosixError(ErrorCodes.EINVAL, e.message);
+            case 'batch_missing_file': return new PosixError(ErrorCodes.EINVAL, e.message);
+
+            // TODO: Associate more of these with posix error codes
+
+            // Open
+            case 'no_suitable_app': break;
+            case 'app_does_not_exist': break;
+
+            // Apps
+            case 'app_name_already_in_use': break;
+
+            // Subdomains
+            case 'subdomain_limit_reached': break;
+            case 'subdomain_reserved': break;
+
+            // Users
+            case 'email_already_in_use': break;
+            case 'username_already_in_use': break;
+            case 'too_many_username_changes': break;
+            case 'token_invalid': break;
+
+            // drivers
+            case 'interface_not_found': break;
+            case 'no_implementation_available': break;
+            case 'method_not_found': break;
+            case 'missing_required_argument': break;
+            case 'argument_consolidation_failed': break;
+
+            // SLA
+            case 'rate_limit_exceeded': break;
+            case 'monthly_limit_exceeded': break;
+            case 'server_rate_exceeded': break;
+
+            // auth
+            case 'token_missing': break;
+            case 'token_auth_failed': break;
+            case 'token_unsupported': break;
+            case 'account_suspended': break;
+            case 'permission_denied': break;
+            case 'access_token_empty_permissions': break;
+
+            // Object Mapping
+            case 'field_not_allowed_for_create': break;
+            case 'field_required_for_update': break;
+            case 'entity_not_found': break;
+
+            // Chat
+            case 'max_tokens_exceeded': break;
+        }
+        // Some other kind of error
+        return new PosixError(ErrorCodes.EUNKNOWN, e.message);
+    }
+
+    //
+    // Helpers for constructing a PosixError when you don't already have an error message.
+    //
+    static AccessNotPermitted({ message, path } = {}) {
+        return new PosixError(ErrorCodes.EACCES, message ?? (path ? `Access not permitted to: '${path}'` : undefined));
+    }
+    static AddressInUse({ message, address } = {}) {
+        return new PosixError(ErrorCodes.EADDRINUSE, message ?? (address ? `Address '${address}' in use` : undefined));
+    }
+    static ConnectionRefused({ message } = {}) {
+        return new PosixError(ErrorCodes.ECONNREFUSED, message);
+    }
+    static ConnectionReset({ message } = {}) {
+        return new PosixError(ErrorCodes.ECONNRESET, message);
+    }
+    static PathAlreadyExists({ message, path } = {}) {
+        return new PosixError(ErrorCodes.EEXIST, message ?? (path ? `Path already exists: '${path}'` : undefined));
+    }
+    static FileTooLarge({ message } = {}) {
+        return new PosixError(ErrorCodes.EFBIG, message);
+    }
+    static InvalidArgument({ message } = {}) {
+        return new PosixError(ErrorCodes.EINVAL, message);
+    }
+    static IO({ message } = {}) {
+        return new PosixError(ErrorCodes.EIO, message);
+    }
+    static IsDirectory({ message, path } = {}) {
+        return new PosixError(ErrorCodes.EISDIR, message ?? (path ? `Path is directory: '${path}'` : undefined));
+    }
+    static TooManyOpenFiles({ message } = {}) {
+        return new PosixError(ErrorCodes.EMFILE, message);
+    }
+    static DoesNotExist({ message, path } = {}) {
+        return new PosixError(ErrorCodes.ENOENT, message ?? (path ? `Path not found: '${path}'` : undefined));
+    }
+    static NotEnoughSpace({ message } = {}) {
+        return new PosixError(ErrorCodes.ENOSPC, message);
+    }
+    static IsNotDirectory({ message, path } = {}) {
+        return new PosixError(ErrorCodes.ENOTDIR, message ?? (path ? `Path is not a directory: '${path}'` : undefined));
+    }
+    static DirectoryIsNotEmpty({ message, path } = {}) {
+        return new PosixError(ErrorCodes.ENOTEMPTY,  message ?? (path ?`Directory is not empty: '${path}'` : undefined));
+    }
+    static OperationNotPermitted({ message } = {}) {
+        return new PosixError(ErrorCodes.EPERM, message);
+    }
+    static BrokenPipe({ message } = {}) {
+        return new PosixError(ErrorCodes.EPIPE, message);
+    }
+    static TimedOut({ message } = {}) {
+        return new PosixError(ErrorCodes.ETIMEDOUT, message);
+    }
+}
+
+module.exports = {
+    ErrorCodes,
+    ErrorMetadata,
+    errorFromIntegerCode,
+    PosixError,
+}