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484 lines
16 KiB
484 lines
16 KiB
#!/usr/bin/env node
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// -*- js -*-
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/* eslint-env node */
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"use strict";
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require("../tools/exit.js");
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var fs = require("fs");
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var info = require("../package.json");
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var path = require("path");
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var program = require("commander");
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var bundle_path = __dirname + (process.env.TERSER_NO_BUNDLE ?
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"/../dist/bundle.js" :
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"/../dist/bundle.min.js");
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var UglifyJS = require(bundle_path);
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try {
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require("source-map-support").install();
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} catch (err) {}
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var skip_keys = [ "cname", "inlined", "parent_scope", "scope", "uses_eval", "uses_with" ];
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var files = {};
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var options = {
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compress: false,
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mangle: false
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};
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program.version(info.name + " " + info.version);
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program.parseArgv = program.parse;
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program.parse = undefined;
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if (process.argv.includes("ast")) program.helpInformation = describe_ast;
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else if (process.argv.includes("options")) program.helpInformation = function() {
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var text = [];
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var options = UglifyJS.default_options();
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for (var option in options) {
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text.push("--" + (option === "output" ? "beautify" : option === "sourceMap" ? "source-map" : option) + " options:");
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text.push(format_object(options[option]));
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text.push("");
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}
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return text.join("\n");
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};
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program.option("-p, --parse <options>", "Specify parser options.", parse_js());
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program.option("-c, --compress [options]", "Enable compressor/specify compressor options.", parse_js());
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program.option("-m, --mangle [options]", "Mangle names/specify mangler options.", parse_js());
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program.option("--mangle-props [options]", "Mangle properties/specify mangler options.", parse_js());
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program.option("-b, --beautify [options]", "Beautify output/specify output options.", parse_js());
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program.option("-o, --output <file>", "Output file (default STDOUT).");
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program.option("--comments [filter]", "Preserve copyright comments in the output.");
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program.option("--config-file <file>", "Read minify() options from JSON file.");
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program.option("-d, --define <expr>[=value]", "Global definitions.", parse_js("define"));
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program.option("--ecma <version>", "Specify ECMAScript release: 5, 6, 7 or 8.");
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program.option("-e, --enclose [arg[,...][:value[,...]]]", "Embed output in a big function with configurable arguments and values.");
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program.option("--ie8", "Support non-standard Internet Explorer 8.");
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program.option("--keep-classnames", "Do not mangle/drop class names.");
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program.option("--keep-fnames", "Do not mangle/drop function names. Useful for code relying on Function.prototype.name.");
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program.option("--module", "Input is an ES6 module");
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program.option("--name-cache <file>", "File to hold mangled name mappings.");
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program.option("--rename", "Force symbol expansion.");
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program.option("--no-rename", "Disable symbol expansion.");
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program.option("--safari10", "Support non-standard Safari 10.");
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program.option("--source-map [options]", "Enable source map/specify source map options.", parse_source_map());
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program.option("--timings", "Display operations run time on STDERR.");
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program.option("--toplevel", "Compress and/or mangle variables in toplevel scope.");
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program.option("--verbose", "Print diagnostic messages.");
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program.option("--warn", "Print warning messages.");
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program.option("--wrap <name>", "Embed everything as a function with “exports” corresponding to “name” globally.");
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program.arguments("[files...]").parseArgv(process.argv);
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if (program.configFile) {
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options = JSON.parse(read_file(program.configFile));
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}
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if (!program.output && program.sourceMap && program.sourceMap.url != "inline") {
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fatal("ERROR: cannot write source map to STDOUT");
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}
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[
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"compress",
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"enclose",
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"ie8",
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"mangle",
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"module",
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"safari10",
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"sourceMap",
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"toplevel",
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"wrap"
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].forEach(function(name) {
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if (name in program) {
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options[name] = program[name];
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}
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});
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if ("ecma" in program) {
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if (program.ecma != (program.ecma | 0)) fatal("ERROR: ecma must be an integer");
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options.ecma = program.ecma | 0;
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}
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if (program.beautify) {
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options.output = typeof program.beautify == "object" ? program.beautify : {};
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if (!("beautify" in options.output)) {
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options.output.beautify = true;
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}
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}
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if (program.comments) {
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if (typeof options.output != "object") options.output = {};
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options.output.comments = typeof program.comments == "string" ? program.comments : "some";
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}
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if (program.define) {
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if (typeof options.compress != "object") options.compress = {};
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if (typeof options.compress.global_defs != "object") options.compress.global_defs = {};
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for (var expr in program.define) {
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options.compress.global_defs[expr] = program.define[expr];
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}
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}
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if (program.keepClassnames) {
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options.keep_classnames = true;
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}
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if (program.keepFnames) {
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options.keep_fnames = true;
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}
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if (program.mangleProps) {
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if (program.mangleProps.domprops) {
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delete program.mangleProps.domprops;
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} else {
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if (typeof program.mangleProps != "object") program.mangleProps = {};
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if (!Array.isArray(program.mangleProps.reserved)) program.mangleProps.reserved = [];
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}
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if (typeof options.mangle != "object") options.mangle = {};
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options.mangle.properties = program.mangleProps;
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}
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if (program.nameCache) {
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options.nameCache = JSON.parse(read_file(program.nameCache, "{}"));
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}
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if (program.output == "ast") {
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options.output = {
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ast: true,
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code: false
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};
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}
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if (program.parse) {
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if (!program.parse.acorn && !program.parse.spidermonkey) {
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options.parse = program.parse;
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} else if (program.sourceMap && program.sourceMap.content == "inline") {
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fatal("ERROR: inline source map only works with built-in parser");
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}
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}
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if (~program.rawArgs.indexOf("--rename")) {
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options.rename = true;
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} else if (!program.rename) {
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options.rename = false;
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}
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var convert_path = function(name) {
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return name;
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};
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if (typeof program.sourceMap == "object" && "base" in program.sourceMap) {
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convert_path = function() {
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var base = program.sourceMap.base;
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delete options.sourceMap.base;
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return function(name) {
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return path.relative(base, name);
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};
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}();
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}
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if (program.verbose) {
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options.warnings = "verbose";
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} else if (program.warn) {
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options.warnings = true;
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}
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let filesList;
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if (options.files && options.files.length) {
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filesList = options.files;
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delete options.files;
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} else if (program.args.length) {
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filesList = program.args;
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}
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if (filesList) {
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simple_glob(filesList).forEach(function(name) {
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files[convert_path(name)] = read_file(name);
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});
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run();
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} else {
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var chunks = [];
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process.stdin.setEncoding("utf8");
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process.stdin.on("data", function(chunk) {
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chunks.push(chunk);
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}).on("end", function() {
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files = [ chunks.join("") ];
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run();
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});
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process.stdin.resume();
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}
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function convert_ast(fn) {
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return UglifyJS.AST_Node.from_mozilla_ast(Object.keys(files).reduce(fn, null));
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}
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function run() {
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UglifyJS.AST_Node.warn_function = function(msg) {
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print_error("WARN: " + msg);
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};
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if (program.timings) options.timings = true;
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try {
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if (program.parse) {
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if (program.parse.acorn) {
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files = convert_ast(function(toplevel, name) {
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return require("acorn").parse(files[name], {
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ecmaVersion: 2018,
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locations: true,
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program: toplevel,
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sourceFile: name,
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sourceType: options.module || program.parse.module ? "module" : "script"
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});
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});
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} else if (program.parse.spidermonkey) {
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files = convert_ast(function(toplevel, name) {
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var obj = JSON.parse(files[name]);
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if (!toplevel) return obj;
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toplevel.body = toplevel.body.concat(obj.body);
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return toplevel;
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});
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}
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}
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} catch (ex) {
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fatal(ex);
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}
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var result = UglifyJS.minify(files, options);
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if (result.error) {
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var ex = result.error;
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if (ex.name == "SyntaxError") {
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print_error("Parse error at " + ex.filename + ":" + ex.line + "," + ex.col);
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var col = ex.col;
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var lines = files[ex.filename].split(/\r?\n/);
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var line = lines[ex.line - 1];
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if (!line && !col) {
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line = lines[ex.line - 2];
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col = line.length;
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}
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if (line) {
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var limit = 70;
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if (col > limit) {
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line = line.slice(col - limit);
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col = limit;
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}
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print_error(line.slice(0, 80));
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print_error(line.slice(0, col).replace(/\S/g, " ") + "^");
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}
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}
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if (ex.defs) {
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print_error("Supported options:");
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print_error(format_object(ex.defs));
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}
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fatal(ex);
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} else if (program.output == "ast") {
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if (!options.compress && !options.mangle) {
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result.ast.figure_out_scope({});
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}
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print(JSON.stringify(result.ast, function(key, value) {
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if (value) switch (key) {
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case "thedef":
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return symdef(value);
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case "enclosed":
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return value.length ? value.map(symdef) : undefined;
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case "variables":
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case "functions":
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case "globals":
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return value.size() ? value.map(symdef) : undefined;
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}
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if (skip_key(key)) return;
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if (value instanceof UglifyJS.AST_Token) return;
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if (value instanceof UglifyJS.Dictionary) return;
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if (value instanceof UglifyJS.AST_Node) {
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var result = {
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_class: "AST_" + value.TYPE
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};
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if (value.block_scope) {
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result.variables = value.block_scope.variables;
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result.functions = value.block_scope.functions;
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result.enclosed = value.block_scope.enclosed;
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}
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value.CTOR.PROPS.forEach(function(prop) {
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result[prop] = value[prop];
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});
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return result;
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}
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return value;
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}, 2));
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} else if (program.output == "spidermonkey") {
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print(JSON.stringify(UglifyJS.minify(result.code, {
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compress: false,
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mangle: false,
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output: {
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ast: true,
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code: false
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}
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}).ast.to_mozilla_ast(), null, 2));
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} else if (program.output) {
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fs.writeFileSync(program.output, result.code);
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if (result.map) {
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fs.writeFileSync(program.output + ".map", result.map);
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}
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} else {
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print(result.code);
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}
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if (program.nameCache) {
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fs.writeFileSync(program.nameCache, JSON.stringify(options.nameCache));
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}
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if (result.timings) for (var phase in result.timings) {
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print_error("- " + phase + ": " + result.timings[phase].toFixed(3) + "s");
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}
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}
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function fatal(message) {
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if (message instanceof Error) message = message.stack.replace(/^\S*?Error:/, "ERROR:");
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print_error(message);
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process.exit(1);
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}
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// A file glob function that only supports "*" and "?" wildcards in the basename.
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// Example: "foo/bar/*baz??.*.js"
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// Argument `glob` may be a string or an array of strings.
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// Returns an array of strings. Garbage in, garbage out.
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function simple_glob(glob) {
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if (Array.isArray(glob)) {
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return [].concat.apply([], glob.map(simple_glob));
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}
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if (glob && glob.match(/[*?]/)) {
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var dir = path.dirname(glob);
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try {
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var entries = fs.readdirSync(dir);
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} catch (ex) {}
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if (entries) {
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var pattern = "^" + path.basename(glob)
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.replace(/[.+^$[\]\\(){}]/g, "\\$&")
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.replace(/\*/g, "[^/\\\\]*")
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.replace(/\?/g, "[^/\\\\]") + "$";
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var mod = process.platform === "win32" ? "i" : "";
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var rx = new RegExp(pattern, mod);
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var results = entries.filter(function(name) {
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return rx.test(name);
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}).map(function(name) {
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return path.join(dir, name);
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});
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if (results.length) return results;
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}
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}
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return [ glob ];
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}
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function read_file(path, default_value) {
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try {
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return fs.readFileSync(path, "utf8");
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} catch (ex) {
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if ((ex.code == "ENOENT" || ex.code == "ENAMETOOLONG") && default_value != null) return default_value;
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fatal(ex);
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}
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}
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function parse_js(flag) {
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return function(value, options) {
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options = options || {};
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try {
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UglifyJS.minify(value, {
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parse: {
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expression: true
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},
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compress: false,
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mangle: false,
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output: {
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ast: true,
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code: false
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}
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}).ast.walk(new UglifyJS.TreeWalker(function(node) {
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if (node instanceof UglifyJS.AST_Assign) {
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var name = node.left.print_to_string();
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var value = node.right;
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if (flag) {
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options[name] = value;
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} else if (value instanceof UglifyJS.AST_Array) {
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options[name] = value.elements.map(to_string);
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} else {
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options[name] = to_string(value);
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}
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return true;
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}
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if (node instanceof UglifyJS.AST_Symbol || node instanceof UglifyJS.AST_PropAccess) {
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var name = node.print_to_string();
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options[name] = true;
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return true;
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}
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if (!(node instanceof UglifyJS.AST_Sequence)) throw node;
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function to_string(value) {
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return value instanceof UglifyJS.AST_Constant ? value.getValue() : value.print_to_string({
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quote_keys: true
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});
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}
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}));
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} catch(ex) {
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if (flag) {
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fatal("Error parsing arguments for '" + flag + "': " + value);
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} else {
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options[value] = null;
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}
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}
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return options;
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};
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}
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function parse_source_map() {
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var parse = parse_js();
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return function(value, options) {
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var hasContent = options && "content" in options;
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var settings = parse(value, options);
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if (!hasContent && settings.content && settings.content != "inline") {
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settings.content = read_file(settings.content, settings.content);
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}
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return settings;
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};
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}
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function skip_key(key) {
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return skip_keys.includes(key);
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}
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function symdef(def) {
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var ret = (1e6 + def.id) + " " + def.name;
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if (def.mangled_name) ret += " " + def.mangled_name;
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return ret;
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}
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function format_object(obj) {
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var lines = [];
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var padding = "";
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Object.keys(obj).map(function(name) {
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if (padding.length < name.length) padding = Array(name.length + 1).join(" ");
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return [ name, JSON.stringify(obj[name]) ];
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}).forEach(function(tokens) {
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lines.push(" " + tokens[0] + padding.slice(tokens[0].length - 2) + tokens[1]);
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});
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return lines.join("\n");
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}
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function print_error(msg) {
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process.stderr.write(msg);
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process.stderr.write("\n");
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}
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function print(txt) {
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process.stdout.write(txt);
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process.stdout.write("\n");
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}
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function describe_ast() {
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var out = UglifyJS.OutputStream({ beautify: true });
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function doitem(ctor) {
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out.print("AST_" + ctor.TYPE);
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var props = ctor.SELF_PROPS.filter(function(prop) {
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return !/^\$/.test(prop);
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});
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if (props.length > 0) {
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out.space();
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out.with_parens(function() {
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props.forEach(function(prop, i) {
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if (i) out.space();
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out.print(prop);
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});
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});
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}
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if (ctor.documentation) {
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out.space();
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out.print_string(ctor.documentation);
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}
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if (ctor.SUBCLASSES.length > 0) {
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out.space();
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out.with_block(function() {
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ctor.SUBCLASSES.forEach(function(ctor, i) {
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out.indent();
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doitem(ctor);
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out.newline();
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});
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});
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}
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}
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doitem(UglifyJS.AST_Node);
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return out + "\n";
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}
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