var compress = function(filename, opts) {
var fileExt = path.extname(filename||'').replace(".","");
// Compress Images
if(config.image_min === true) {
if(fileExt == 'png' || fileExt == 'jpg' || fileExt == 'jpeg' || fileExt == 'gif') {
imagemin(filename , filename, { optimizationLevel: 4 }, function (err, data) {
console.log('Images Compressed!!');
});
}
}
if (alreadyPacked(filename) || !processable(fileExt)) return;
var originalContent = fs.readFileSync(filename).toString();
var minifiedContent = supportedResources[fileExt](originalContent, opts);
if (minifiedContent) {
if (!opts.silent) {
console.log("[info] Minify: " + filename.replace(hexo.public_dir, ""));
}
fs.unlink( filename, function ( err ) {
if ( err ) throw err;
fs.writeFile(filename, minifiedContent, 'utf8', function(err) {
if (err) throw err;
});
});
}
};
async.forEachLimit(files, os.cpus().length, function (file, next) {
var msg;
options.ext = path.extname(file.src[0]);
// filter out dirs
if (!options.ext) {
return next();
}
mkdirp.sync(path.dirname(file.dest));
fs.createReadStream(file.src[0])
.pipe(imagemin(options)
.on('error', grunt.warn.bind(grunt))
.on('close', function (data) {
totalSaved += data.diffSizeRaw;
if (data.diffSizeRaw < 10) {
msg = 'already optimized';
} else {
msg = 'saved ' + data.diffSize + ' - ' + (data.diffSizeRaw / data.origSizeRaw * 100).toFixed() + '%';
}
}))
.pipe(fs.createWriteStream(file.dest)
.on('error', grunt.warn.bind(grunt))
.on('close', function () {
grunt.log.writeln(chalk.green('✔ ') + file.src[0] + chalk.gray(' (' + msg + ')'));
process.nextTick(next);
}));
}, function (err) {
async.forEachLimit(images, os.cpus().length, function (file, next) {
var saveTarget = path.join(options.resultPath, path.relative(options.watchPath, file));
imagemin(file, saveTarget, options, function (err, data) {
formatFileCompressionLog(err, data, file);
totalSaved += data.diffSizeRaw;
process.nextTick(next);
});
}, function (err) {
async.forEachLimit(this.files, os.cpus().length, function (file, next) {
imagemin(file.src[0], file.dest, options, function (err, data) {
var msg;
if (err) {
grunt.warn(err);
}
totalSaved += data.diffSizeRaw;
if (data.diffSizeRaw < 10) {
msg = 'already optimized';
} else {
msg = 'saved ' + data.diffSize;
}
grunt.log.writeln(chalk.green('✔ ') + file.src[0] + chalk.gray(' (' + msg + ')'));
process.nextTick(next);
});
}, function (err) {
fs.stat(tempFile, function (err, stats) {
if (err) {
return cb(new gutil.PluginError('gulp-imagemin', err));
}
var origSize = stats.size;
imagemin(tempFile, tempFile, options, function () {
fs.readFile(tempFile, function (err, data) {
if (err) {
return cb(new gutil.PluginError('gulp-imagemin', err));
}
var saved = origSize - data.length;
var savedMsg = saved > 0 ? 'saved ' + filesize(saved, {round: 1}) : 'already optimized';
gutil.log('gulp-imagemin:', gutil.colors.green('✔ ') + file.relative + gutil.colors.gray(' (' + savedMsg + ')'));
file.contents = data;
cb(null, file);
});
});
});
fs.mkdir(path.dirname(saveTarget), function(){
imagemin(filename, saveTarget, options.imageminOptions, function (err, data){
formatFileCompressionLog(err, data, filename);
});
});