WIP - add extractor, generate snippet_data

node_modules/decompress/index.js

@@ -0,0 +1,96 @@
+'use strict';
+const path = require('path');
+const fs = require('graceful-fs');
+const decompressTar = require('decompress-tar');
+const decompressTarbz2 = require('decompress-tarbz2');
+const decompressTargz = require('decompress-targz');
+const decompressUnzip = require('decompress-unzip');
+const makeDir = require('make-dir');
+const pify = require('pify');
+const stripDirs = require('strip-dirs');
+
+const fsP = pify(fs);
+
+const runPlugins = (input, opts) => {
+	if (opts.plugins.length === 0) {
+		return Promise.resolve([]);
+	}
+
+	return Promise.all(opts.plugins.map(x => x(input, opts))).then(files => files.reduce((a, b) => a.concat(b)));
+};
+
+const extractFile = (input, output, opts) => runPlugins(input, opts).then(files => {
+	if (opts.strip > 0) {
+		files = files
+			.map(x => {
+				x.path = stripDirs(x.path, opts.strip);
+				return x;
+			})
+			.filter(x => x.path !== '.');
+	}
+
+	if (typeof opts.filter === 'function') {
+		files = files.filter(opts.filter);
+	}
+
+	if (typeof opts.map === 'function') {
+		files = files.map(opts.map);
+	}
+
+	if (!output) {
+		return files;
+	}
+
+	return Promise.all(files.map(x => {
+		const dest = path.join(output, x.path);
+		const mode = x.mode & ~process.umask();
+		const now = new Date();
+
+		if (x.type === 'directory') {
+			return makeDir(dest)
+				.then(() => fsP.utimes(dest, now, x.mtime))
+				.then(() => x);
+		}
+
+		return makeDir(path.dirname(dest))
+			.then(() => {
+				if (x.type === 'link') {
+					return fsP.link(x.linkname, dest);
+				}
+
+				if (x.type === 'symlink' && process.platform === 'win32') {
+					return fsP.link(x.linkname, dest);
+				}
+
+				if (x.type === 'symlink') {
+					return fsP.symlink(x.linkname, dest);
+				}
+
+				return fsP.writeFile(dest, x.data, {mode});
+			})
+			.then(() => x.type === 'file' && fsP.utimes(dest, now, x.mtime))
+			.then(() => x);
+	}));
+});
+
+module.exports = (input, output, opts) => {
+	if (typeof input !== 'string' && !Buffer.isBuffer(input)) {
+		return Promise.reject(new TypeError('Input file required'));
+	}
+
+	if (typeof output === 'object') {
+		opts = output;
+		output = null;
+	}
+
+	opts = Object.assign({plugins: [
+		decompressTar(),
+		decompressTarbz2(),
+		decompressTargz(),
+		decompressUnzip()
+	]}, opts);
+
+	const read = typeof input === 'string' ? fsP.readFile(input) : Promise.resolve(input);
+
+	return read.then(buf => extractFile(buf, output, opts));
+};