first commit

build/node_modules/imagemin-jpegtran/index.js

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+'use strict';
+const execBuffer = require('exec-buffer');
+const isJpg = require('is-jpg');
+const jpegtran = require('jpegtran-bin');
+
+module.exports = opts => buf => {
+	opts = Object.assign({}, opts);
+
+	if (!Buffer.isBuffer(buf)) {
+		return Promise.reject(new TypeError('Expected a buffer'));
+	}
+
+	if (!isJpg(buf)) {
+		return Promise.resolve(buf);
+	}
+
+	const args = ['-copy', 'none'];
+
+	if (opts.progressive) {
+		args.push('-progressive');
+	}
+
+	if (opts.arithmetic) {
+		args.push('-arithmetic');
+	} else {
+		args.push('-optimize');
+	}
+
+	args.push('-outfile', execBuffer.output, execBuffer.input);
+
+	return execBuffer({
+		input: buf,
+		bin: jpegtran,
+		args
+	}).catch(err => {
+		err.message = err.stderr || err.message;
+		throw err;
+	});
+};