57 lines
1.6 KiB
JavaScript
57 lines
1.6 KiB
JavaScript
'use strict';
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var path = require('path');
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var fs = require('graceful-fs');
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var gutil = require('gulp-util');
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var map = require('map-stream');
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var filesize = require('filesize');
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var tempWrite = require('temp-write');
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var imagemin = require('image-min');
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module.exports = function (options) {
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return map(function (file, cb) {
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if (file.isNull()) {
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return cb(null, file);
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}
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if (file.isStream()) {
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return cb(new gutil.PluginError('gulp-imagemin', 'Streaming not supported'));
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}
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if (['.jpg', '.jpeg', '.png', '.gif'].indexOf(path.extname(file.path).toLowerCase()) === -1) {
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gutil.log('gulp-imagemin: Skipping unsupported image ' + gutil.colors.blue(file.relative));
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return cb(null, file);
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}
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tempWrite(file.contents, path.basename(file.path), function (err, tempFile) {
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if (err) {
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return cb(new gutil.PluginError('gulp-imagemin', err));
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}
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// workaround: https://github.com/kevva/image-min/issues/8
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fs.stat(tempFile, function (err, stats) {
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if (err) {
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return cb(new gutil.PluginError('gulp-imagemin', err));
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}
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var origSize = stats.size;
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imagemin(tempFile, tempFile, options, function () {
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fs.readFile(tempFile, function (err, data) {
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if (err) {
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return cb(new gutil.PluginError('gulp-imagemin', err));
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}
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var saved = origSize - data.length;
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var savedMsg = saved > 0 ? 'saved ' + filesize(saved, {round: 1}) : 'already optimized';
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gutil.log('gulp-imagemin:', gutil.colors.green('✔ ') + file.relative + gutil.colors.gray(' (' + savedMsg + ')'));
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file.contents = data;
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cb(null, file);
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});
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});
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});
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});
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});
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};
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