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97 lines
2.3 KiB
JavaScript
97 lines
2.3 KiB
JavaScript
'use strict';
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const path = require('path');
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const fs = require('graceful-fs');
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const decompressTar = require('decompress-tar');
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const decompressTarbz2 = require('decompress-tarbz2');
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const decompressTargz = require('decompress-targz');
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const decompressUnzip = require('decompress-unzip');
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const makeDir = require('make-dir');
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const pify = require('pify');
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const stripDirs = require('strip-dirs');
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const fsP = pify(fs);
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const runPlugins = (input, opts) => {
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if (opts.plugins.length === 0) {
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return Promise.resolve([]);
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}
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return Promise.all(opts.plugins.map(x => x(input, opts))).then(files => files.reduce((a, b) => a.concat(b)));
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};
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const extractFile = (input, output, opts) => runPlugins(input, opts).then(files => {
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if (opts.strip > 0) {
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files = files
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.map(x => {
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x.path = stripDirs(x.path, opts.strip);
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return x;
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})
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.filter(x => x.path !== '.');
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}
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if (typeof opts.filter === 'function') {
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files = files.filter(opts.filter);
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}
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if (typeof opts.map === 'function') {
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files = files.map(opts.map);
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}
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if (!output) {
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return files;
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}
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return Promise.all(files.map(x => {
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const dest = path.join(output, x.path);
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const mode = x.mode & ~process.umask();
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const now = new Date();
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if (x.type === 'directory') {
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return makeDir(dest)
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.then(() => fsP.utimes(dest, now, x.mtime))
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.then(() => x);
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}
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return makeDir(path.dirname(dest))
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.then(() => {
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if (x.type === 'link') {
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return fsP.link(x.linkname, dest);
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}
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if (x.type === 'symlink' && process.platform === 'win32') {
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return fsP.link(x.linkname, dest);
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}
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if (x.type === 'symlink') {
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return fsP.symlink(x.linkname, dest);
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}
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return fsP.writeFile(dest, x.data, {mode});
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})
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.then(() => x.type === 'file' && fsP.utimes(dest, now, x.mtime))
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.then(() => x);
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}));
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});
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module.exports = (input, output, opts) => {
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if (typeof input !== 'string' && !Buffer.isBuffer(input)) {
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return Promise.reject(new TypeError('Input file required'));
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}
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if (typeof output === 'object') {
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opts = output;
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output = null;
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}
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opts = Object.assign({plugins: [
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decompressTar(),
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decompressTarbz2(),
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decompressTargz(),
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decompressUnzip()
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]}, opts);
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const read = typeof input === 'string' ? fsP.readFile(input) : Promise.resolve(input);
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return read.then(buf => extractFile(buf, output, opts));
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};
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