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build/node_modules/decompress-targz/index.js

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+'use strict';
+
+var File = require('vinyl');
+var fs = require('fs');
+var isGzip = require('is-gzip');
+var objectAssign = require('object-assign');
+var stripDirs = require('strip-dirs');
+var tar = require('tar-stream');
+var through = require('through2');
+var zlib = require('zlib');
+
+module.exports = function (opts) {
+	opts = opts || {};
+	opts.strip = +opts.strip || 0;
+
+	return through.obj(function (file, enc, cb) {
+		var self = this;
+		var extract = tar.extract();
+		var unzip = zlib.Unzip();
+
+		if (file.isNull()) {
+			cb(null, file);
+			return;
+		}
+
+		if (file.isStream()) {
+			cb(new Error('Streaming is not supported'));
+			return;
+		}
+
+		if (!file.extract || !isGzip(file.contents)) {
+			cb(null, file);
+			return;
+		}
+
+		extract.on('entry', function (header, stream, done) {
+			var chunk = [];
+			var len = 0;
+
+			stream.on('data', function (data) {
+				chunk.push(data);
+				len += data.length;
+			});
+
+			stream.on('end', function () {
+				if (header.type !== 'directory') {
+					self.push(new File({
+						contents: Buffer.concat(chunk, len),
+						path: stripDirs(header.name, opts.strip),
+						stat: objectAssign(new fs.Stats(), header)
+					}));
+				}
+
+				done();
+			});
+		});
+
+		extract.on('finish', cb);
+		extract.on('error', cb);
+		unzip.end(file.contents);
+		unzip.pipe(extract);
+	});
+};