first commit

build/node_modules/imagemin-guetzli/index.js

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+'use strict';
+const execBuffer = require('exec-buffer');
+const isPng = require('is-png');
+const isJpg = require('is-jpg');
+const isInt = require('number-is-integer');
+const guetzli = require('guetzli');
+
+module.exports = opts => buf => {
+	opts = Object.assign({}, opts);
+
+	if (!Buffer.isBuffer(buf)) {
+		return Promise.reject(new TypeError('Expected a buffer'));
+	}
+
+	if (!isPng(buf) && !isJpg(buf)) {
+		return Promise.resolve(buf);
+	}
+
+	const args = [];
+
+	if (isInt(opts.quality) && opts.quality >= 0 && opts.quality <= 100) {
+		args.push('--quality', opts.quality);
+	}
+
+	if (isInt(opts.memlimit) && opts.memlimit > 0) {
+		args.push('--memlimit', opts.memlimit);
+	}
+
+	if (opts.nomemlimit) {
+		args.push('--nomemlimit');
+	}
+
+	args.push(execBuffer.input, execBuffer.output);
+
+	return execBuffer({
+		input: buf,
+		bin: guetzli,
+		args
+	}).catch(err => {
+		err.message = err.stderr || err.message;
+		throw err;
+	});
+};