Fix #604: cli for buidling JSON image from folder (#613)

* Fix #604: cli for buidling JSON image from folder

* Allow passing --filer to specify a filer module to use (different version)

* Deal with fs.chown not existing on older versions of Filer

* Tidy up some loose ends

* Make fs-image.js executable
This commit is contained in:
David Humphrey 2018-12-06 22:22:18 -05:00 committed by GitHub
parent 0e75661b4b
commit 97a6004091
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4 changed files with 553 additions and 1 deletions

361
package-lock.json generated
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"integrity": "sha512-qNdTUMaCjPs4eEnM3W9H94R3sU70YCuT+/ST7nUf+id1bVOrdjrpUaeZLqPBPRph3hsgn4a4BvwpxhHZx+oSDg==",
"dev": true
},
"validate-npm-package-license": {
"version": "3.0.4",
"resolved": "https://registry.npmjs.org/validate-npm-package-license/-/validate-npm-package-license-3.0.4.tgz",
"integrity": "sha512-DpKm2Ui/xN7/HQKCtpZxoRWBhZ9Z0kqtygG8XCgNQ8ZlDnxuQmWhj566j8fN4Cu3/JmbhsDo7fcAJq4s9h27Ew==",
"dev": true,
"requires": {
"spdx-correct": "^3.0.0",
"spdx-expression-parse": "^3.0.0"
}
},
"vendors": {
"version": "1.0.2",
"resolved": "https://registry.npmjs.org/vendors/-/vendors-1.0.2.tgz",
@ -9736,6 +10079,15 @@
"integrity": "sha1-wGavtYK7HLQSjWDqkjkulNXp2+w=",
"dev": true
},
"walk": {
"version": "2.3.14",
"resolved": "https://registry.npmjs.org/walk/-/walk-2.3.14.tgz",
"integrity": "sha512-5skcWAUmySj6hkBdH6B6+3ddMjVQYH5Qy9QGbPmN8kVmLteXk+yVXg+yfk1nbX30EYakahLrr8iPcCxJQSCBeg==",
"dev": true,
"requires": {
"foreachasync": "^3.0.0"
}
},
"wcwidth": {
"version": "1.0.1",
"resolved": "https://registry.npmjs.org/wcwidth/-/wcwidth-1.0.1.tgz",
@ -9802,6 +10154,15 @@
"integrity": "sha1-pcbVMr5lbiPbgg77lDofBJmNY68=",
"dev": true
},
"yargs-parser": {
"version": "10.1.0",
"resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-10.1.0.tgz",
"integrity": "sha512-VCIyR1wJoEBZUqk5PA+oOBF6ypbwh5aNB3I50guxAL/quggdfs4TtNHQrSazFA3fYZ+tEqfs0zIGlv0c/rgjbQ==",
"dev": true,
"requires": {
"camelcase": "^4.1.0"
}
},
"yeast": {
"version": "0.1.2",
"resolved": "https://registry.npmjs.org/yeast/-/yeast-0.1.2.tgz",

View File

@ -54,9 +54,13 @@
"karma-mocha": "^1.3.0",
"karma-mocha-reporter": "^2.2.5",
"karma-summary-reporter": "^1.5.1",
"meow": "^5.0.0",
"mocha": "^5.2.0",
"nyc": "^13.1.0",
"parcel-bundler": "^1.9.6"
"parcel-bundler": "^1.9.6",
"pretty-bytes": "^5.1.0",
"unused-filename": "^1.0.0",
"walk": "^2.3.14"
},
"main": "./src/index.js",
"browser": "./dist/filer.min.js",

View File

@ -18,6 +18,12 @@ class SerializableMemoryProvider extends MemoryProvider {
return callback(err);
}
// If we don't have an image to import, leave db as is
if(!this.unparsedJSONImage) {
return callback();
}
// Try to import the fs image from JSON
try {
this.db = parseBJSON(this.unparsedJSONImage);
this.unparsedJSONImage = null;

181
tools/fs-image.js Executable file
View File

@ -0,0 +1,181 @@
#!/usr/bin/env node
/* eslint-disable no-console */
'use strict';
// Filer's path messes with process.cwd(), cache the real one
const cwd = process.cwd();
const path = require('path');
const fs = require('fs');
const SerializableMemoryProvider = require('../tests/lib/serializable-memory-provider');
const unusedFilename = require('unused-filename');
const prettyBytes = require('pretty-bytes');
const walk = require('walk');
const meow = require('meow');
const cli = meow(`
Usage
$ fs-image <input-dir> [<output-filename>] [--verbose] [--filer path/to/filer.js]
Options
--filer, -f Specify a Filer module path to use. Defaults to current.
--verbose, -v Verbose logging
Examples
$ fs-image files/ files.json
$ fs-image files/
$ fs-image files/ existing.json --verbose
$ fs-image files/ --filer ./versions/filer-0.44.js
`, {
description: 'Create a Filer Filesystem Image from a directory',
flags: {
verbose: {
type: 'boolean',
alias: 'v',
default: false
},
filer: {
type: 'string',
alias: 'f'
}
}
});
// Get arg list, make sure we get a dir path argument
cli.flags.app = cli.input.slice(1);
if(!(cli.input && cli.input.length >= 1)) {
console.error('Specify a directory path to use as the image source');
process.exit(1);
}
const dirPath = path.normalize(cli.input[0]);
const exportFilePath = cli.input[1] ? path.normalize(cli.input[1]) : null;
const log = msg => {
if(cli.flags.verbose) {
console.log(msg);
}
};
// Load the version of Filer specified, or use current version in tree (default).
let filerModulePath = cli.flags.filer ? path.resolve(cwd, cli.flags.filer) : '../';
// Make sure we have an existing dir as our root
fs.stat(dirPath, (err, stats) => {
if(err || !(stats && stats.isDirectory())) {
console.error(`Expected existing directory for dirpath: ${dirPath}`);
process.exit(1);
}
let Filer;
try {
Filer = require(filerModulePath);
log(`Using Filer module at path ${filerModulePath}`);
} catch(e) {
console.error(`Unable to load Filer module at ${filerModulePath}: ${e.message}`);
process.exit(1);
}
// Create a filer instance with serializable provider, and start walking dir path
const provider = new SerializableMemoryProvider();
const filer = new Filer.FileSystem({provider: provider});
const walker = walk.walk(dirPath);
// Convert a filesystem path into a Filer path, rooted in /
const toFilerPath = fsPath => path.join('/', fsPath.replace(dirPath, ''));
// Write a file to Filer, including various metadata from the file node
const filerWriteFile = (filerPath, stats, data, callback) => {
const error = err => console.error(`[Filer] ${err}`);
// Convert date to ms
const toDateMS = d => (new Date(d)).getTime();
const mode = stats.mode;
const atime = toDateMS(stats.atime);
const mtime = toDateMS(stats.mtime);
const uid = stats.uid;
const gid = stats.gid;
filer.writeFile(filerPath, data, { mode }, (err) => {
if(err) {
error(`Error writing ${filerPath}: ${err.message}`);
return callback(err);
}
filer.utimes(filerPath, atime, mtime, err => {
if(err) {
error(`Error writing ${filerPath}: ${err.message}`);
return callback(err);
}
// Not all shipped versions of Filer had chown(), bail if not present
if(typeof filer.chown !== 'function') {
log(` File Node: mode=${mode} atime=${atime} mtime=${mtime}`);
return callback();
}
filer.chown(filerPath, stats.uid, stats.gid, err => {
if(err) {
error(`Error writing ${filerPath}: ${err.message}`);
return callback(err);
}
log(` File Node: mode=${mode} uid=${uid} gid=${gid} atime=${atime} mtime=${mtime}`);
callback();
});
});
});
};
// Process every file we find in dirpath
walker.on('file', (root, fileStats, next) => {
const filePath = path.join(root, fileStats.name);
const filerPath = toFilerPath(filePath);
log(`Writing file ${filePath} to ${filerPath} [${prettyBytes(fileStats.size)}]`);
fs.readFile(filePath, null, (err, data) => {
if(err) {
console.error(`Error reading file ${filePath}: ${err.message}`);
return next(err);
}
filerWriteFile(filerPath, stats, data, next);
});
});
// Process every dir we find in dirpath
walker.on('directory', (root, dirStats, next) => {
const dirPath = path.join(root, dirStats.name);
const filerPath = toFilerPath(dirPath);
log(`Creating dir ${dirPath} in ${filerPath}`);
filer.mkdir(filerPath, err => {
if(err && err.code !== 'EEXIST') {
console.error(`[Filer] Unable to create dir ${filerPath}: ${err.message}`);
return next(err);
}
next();
});
});
// When we're done processing entries, serialize filesystem to .json
walker.on('end', () => {
const writeFile = filename => {
fs.writeFile(filename, provider.export(), err => {
if(err) {
console.error(`Error writing exported filesystem: ${err.message}`);
process.exit(1);
}
console.log(`Wrote filesystem JSON to ${filename}`);
process.exit(0);
});
};
// If we have an explicit filename to use, use it. Otherwise
// generate a new one like `filesystem (2).json`
if(exportFilePath) {
writeFile(exportFilePath);
} else {
unusedFilename('filesystem.json').then(filename => writeFile(filename));
}
});
});