/*
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* grunt-contrib-uglify
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* https://gruntjs.com/
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*
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* Copyright (c) 2016 "Cowboy" Ben Alman, contributors
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* Licensed under the MIT license.
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*/
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'use strict';
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var path = require('path');
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var chalk = require('chalk');
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var maxmin = require('maxmin');
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var uriPath = require('uri-path');
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var err;
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// Return the relative path from file1 => file2
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function relativePath(file1, file2) {
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var file1Dirname = path.dirname(file1);
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var file2Dirname = path.dirname(file2);
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if (file1Dirname !== file2Dirname) {
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return path.relative(file1Dirname, file2Dirname);
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}
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return '';
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}
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// Converts \r\n to \n
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function normalizeLf(string) {
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return string.replace(/\r\n/g, '\n');
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}
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module.exports = function(grunt) {
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// Internal lib.
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var uglify = require('./lib/uglify').init(grunt);
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var getAvailableFiles = function (filesArray) {
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return filesArray.filter(function (filepath) {
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if (!grunt.file.exists(filepath)) {
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grunt.log.warn('Source file ' + chalk.cyan(filepath) + ' not found');
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return false;
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}
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return true;
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});
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};
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grunt.registerMultiTask('uglify', 'Minify files with UglifyJS.', function() {
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// Merge task-specific and/or target-specific options with these defaults.
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var options = this.options({
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banner: '',
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footer: '',
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compress: {},
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mangle: {},
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beautify: false,
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report: 'min',
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ie8: false
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});
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var footer = normalizeLf(options.footer);
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var mapNameGenerator, mapInNameGenerator;
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var created = {
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maps: 0,
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files: 0
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};
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var size = {
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before: 0,
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after: 0
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};
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var generateSourceMapURL = options.sourceMap && !options.sourceMap.url;
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var generateSourceMapFilename = options.sourceMap && !options.sourceMap.filename;
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// function to get the name of the sourceMap
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if (typeof options.sourceMapName === 'function') {
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mapNameGenerator = options.sourceMapName;
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}
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// Iterate over all src-dest file pairs.
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this.files.forEach(function (f) {
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var availableFiles = getAvailableFiles(f.src);
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if (availableFiles.length === 0) {
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grunt.log.warn('Destination ' + chalk.cyan(f.dest) + ' not written because src files were empty.');
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return;
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}
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// function to get the name of the sourceMapIn file
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if (typeof options.sourceMapIn === 'function') {
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if (availableFiles.length !== 1) {
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grunt.fail.warn('Cannot generate `sourceMapIn` for multiple source files.');
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}
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mapInNameGenerator = options.sourceMapIn;
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}
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// dynamically create destination sourcemap name
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if (mapNameGenerator) {
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try {
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options.generatedSourceMapName = mapNameGenerator(f.dest);
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} catch (e) {
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err = new Error('SourceMap failed.');
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err.origError = e;
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grunt.fail.warn(err);
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}
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// If no name is passed append .map to the filename
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} else if (!options.sourceMapName) {
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options.generatedSourceMapName = f.dest + '.map';
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} else {
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options.generatedSourceMapName = options.sourceMapName;
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}
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// Dynamically create incoming sourcemap names
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if (mapInNameGenerator) {
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try {
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options.sourceMapIn = mapInNameGenerator(availableFiles[0]);
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} catch (e) {
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err = new Error('SourceMapInName failed.');
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err.origError = e;
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grunt.fail.warn(err);
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}
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}
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if (options.sourceMap) {
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if (typeof options.sourceMap !== 'object') {
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options.sourceMap = {};
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}
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if (options.sourceMapIn) {
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options.sourceMap.content = grunt.file.read(options.sourceMapIn);
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}
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// Calculate the path from the dest file to the sourcemap for sourceMap.url
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if (generateSourceMapURL) {
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if (generateSourceMapFilename) {
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options.sourceMap.filename = path.basename(f.dest);
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}
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var destToSourceMapPath = relativePath(f.dest, options.generatedSourceMapName);
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var sourceMapBasename = path.basename(options.generatedSourceMapName);
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options.sourceMap.url = uriPath(path.join(destToSourceMapPath, sourceMapBasename));
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}
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}
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// Minify files, warn and fail on error.
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var result;
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try {
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result = uglify.minify(availableFiles, f.dest, options);
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} catch (e) {
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console.log(e);
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err = new Error('Uglification failed.');
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if (e.message) {
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err.message += '\n' + e.message + '. \n';
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if (e.line) {
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err.message += 'Line ' + e.line + ' in ' + availableFiles + '\n';
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}
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}
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err.origError = e;
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grunt.log.warn('Uglifying source ' + chalk.cyan(availableFiles) + ' failed.');
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grunt.fail.warn(err);
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}
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// Concat minified source + footer
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var output = result.min + footer;
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var unCompiledJSString = availableFiles.map(function (file) {
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return grunt.file.read(file);
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}).join('');
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// Write the destination file.
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grunt.file.write(f.dest, output);
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size.before += unCompiledJSString.length;
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// Write source map
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if (options.sourceMap) {
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grunt.file.write(options.generatedSourceMapName, result.sourceMap);
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grunt.verbose.writeln('File ' + chalk.cyan(options.generatedSourceMapName) + ' created (source map).');
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created.maps++;
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}
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var outputSize = maxmin(result.max, output, options.report === 'gzip');
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grunt.verbose.writeln('File ' + chalk.cyan(f.dest) + ' created: ' + chalk.dim(outputSize));
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created.files++;
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size.after += output.length;
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});
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if (created.maps > 0) {
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grunt.log.ok(created.maps + ' source' + grunt.util.pluralize(created.maps, 'map/maps') + ' created.');
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}
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if (created.files > 0) {
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grunt.log.ok(created.files + ' ' + grunt.util.pluralize(this.files.length, 'file/files') + ' created ' + chalk.dim(maxmin(size.before, size.after)));
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} else {
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grunt.log.warn('No files created.');
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}
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});
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};
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