285 lines
10 KiB
JavaScript
285 lines
10 KiB
JavaScript
#! /usr/bin/env node
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// -*- js -*-
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global.sys = require(/^v0\.[012]/.test(process.version) ? "sys" : "util");
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var fs = require("fs");
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var jsp = require("./lib/parse-js"),
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pro = require("./lib/process");
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var options = {
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ast: false,
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mangle: true,
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mangle_toplevel: false,
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squeeze: true,
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make_seqs: true,
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dead_code: true,
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verbose: false,
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show_copyright: true,
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out_same_file: false,
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max_line_length: 32 * 1024,
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unsafe: false,
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reserved_names: null,
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defines: { },
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codegen_options: {
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ascii_only: false,
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beautify: false,
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indent_level: 4,
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indent_start: 0,
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quote_keys: false,
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space_colon: false
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},
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output: true // stdout
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};
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var args = jsp.slice(process.argv, 2);
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var filename;
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out: while (args.length > 0) {
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var v = args.shift();
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switch (v) {
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case "-b":
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case "--beautify":
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options.codegen_options.beautify = true;
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break;
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case "-i":
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case "--indent":
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options.codegen_options.indent_level = args.shift();
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break;
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case "-q":
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case "--quote-keys":
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options.codegen_options.quote_keys = true;
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break;
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case "-mt":
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case "--mangle-toplevel":
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options.mangle_toplevel = true;
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break;
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case "--no-mangle":
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case "-nm":
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options.mangle = false;
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break;
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case "--no-squeeze":
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case "-ns":
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options.squeeze = false;
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break;
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case "--no-seqs":
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options.make_seqs = false;
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break;
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case "--no-dead-code":
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options.dead_code = false;
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break;
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case "--no-copyright":
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case "-nc":
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options.show_copyright = false;
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break;
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case "-o":
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case "--output":
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options.output = args.shift();
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break;
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case "--overwrite":
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options.out_same_file = true;
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break;
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case "-v":
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case "--verbose":
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options.verbose = true;
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break;
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case "--ast":
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options.ast = true;
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break;
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case "--unsafe":
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options.unsafe = true;
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break;
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case "--max-line-len":
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options.max_line_length = parseInt(args.shift(), 10);
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break;
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case "--reserved-names":
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options.reserved_names = args.shift().split(",");
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break;
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case "-d":
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case "--define":
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var defarg = args.shift();
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try {
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var defsym = function(sym) {
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// KEYWORDS_ATOM doesn't include NaN or Infinity - should we check
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// for them too ?? We don't check reserved words and the like as the
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// define values are only substituted AFTER parsing
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if (jsp.KEYWORDS_ATOM.hasOwnProperty(sym)) {
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throw "Don't define values for inbuilt constant '"+sym+"'";
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}
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return sym;
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},
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defval = function(v) {
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if (v.match(/^"(.*)"$/) || v.match(/^'(.*)'$/)) {
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return [ "string", RegExp.$1 ];
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}
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else if (!isNaN(parseFloat(v))) {
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return [ "num", parseFloat(v) ];
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}
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else if (v.match(/^[a-z\$_][a-z\$_0-9]*$/i)) {
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return [ "name", v ];
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}
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else if (!v.match(/"/)) {
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return [ "string", v ];
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}
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else if (!v.match(/'/)) {
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return [ "string", v ];
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}
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throw "Can't understand the specified value: "+v;
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};
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if (defarg.match(/^([a-z_\$][a-z_\$0-9]*)(=(.*))?$/i)) {
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var sym = defsym(RegExp.$1),
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val = RegExp.$2 ? defval(RegExp.$2.substr(1)) : [ 'name', 'true' ];
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options.defines[sym] = val;
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}
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else {
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throw "The --define option expects SYMBOL[=value]";
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}
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} catch(ex) {
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sys.print("ERROR: In option --define "+defarg+"\n"+ex+"\n");
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process.exit(1);
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}
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break;
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case "--define-from-module":
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var defmodarg = args.shift(),
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defmodule = require(defmodarg),
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sym,
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val;
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for (sym in defmodule) {
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if (defmodule.hasOwnProperty(sym)) {
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options.defines[sym] = function(val) {
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if (typeof val == "string")
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return [ "string", val ];
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if (typeof val == "number")
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return [ "num", val ];
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if (val === true)
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return [ 'name', 'true' ];
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if (val === false)
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return [ 'name', 'false' ];
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if (val === null)
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return [ 'name', 'null' ];
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if (val === undefined)
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return [ 'name', 'undefined' ];
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sys.print("ERROR: In option --define-from-module "+defmodarg+"\n");
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sys.print("ERROR: Unknown object type for: "+sym+"="+val+"\n");
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process.exit(1);
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return null;
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}(defmodule[sym]);
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}
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}
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break;
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case "--ascii":
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options.codegen_options.ascii_only = true;
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break;
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default:
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filename = v;
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break out;
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}
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}
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if (options.verbose) {
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pro.set_logger(function(msg){
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sys.debug(msg);
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});
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}
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jsp.set_logger(function(msg){
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sys.debug(msg);
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});
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if (filename) {
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fs.readFile(filename, "utf8", function(err, text){
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if (err) throw err;
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output(squeeze_it(text));
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});
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} else {
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var stdin = process.openStdin();
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stdin.setEncoding("utf8");
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var text = "";
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stdin.on("data", function(chunk){
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text += chunk;
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});
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stdin.on("end", function() {
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output(squeeze_it(text));
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});
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}
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function output(text) {
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var out;
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if (options.out_same_file && filename)
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options.output = filename;
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if (options.output === true) {
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out = process.stdout;
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} else {
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out = fs.createWriteStream(options.output, {
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flags: "w",
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encoding: "utf8",
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mode: 0644
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});
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}
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out.write(text);
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if (options.output !== true) {
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out.end();
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}
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};
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// --------- main ends here.
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function show_copyright(comments) {
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var ret = "";
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for (var i = 0; i < comments.length; ++i) {
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var c = comments[i];
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if (c.type == "comment1") {
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ret += "//" + c.value + "\n";
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} else {
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ret += "/*" + c.value + "*/";
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}
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}
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return ret;
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};
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function squeeze_it(code) {
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var result = "";
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if (options.show_copyright) {
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var tok = jsp.tokenizer(code), c;
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c = tok();
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result += show_copyright(c.comments_before);
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}
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try {
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var ast = time_it("parse", function(){ return jsp.parse(code); });
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if (options.mangle) ast = time_it("mangle", function(){
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return pro.ast_mangle(ast, {
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toplevel: options.mangle_toplevel,
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defines: options.defines,
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except: options.reserved_names
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});
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});
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if (options.squeeze) ast = time_it("squeeze", function(){
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ast = pro.ast_squeeze(ast, {
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make_seqs : options.make_seqs,
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dead_code : options.dead_code,
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keep_comps : !options.unsafe
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});
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if (options.unsafe)
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ast = pro.ast_squeeze_more(ast);
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return ast;
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});
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if (options.ast)
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return sys.inspect(ast, null, null);
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result += time_it("generate", function(){ return pro.gen_code(ast, options.codegen_options) });
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if (!options.codegen_options.beautify && options.max_line_length) {
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result = time_it("split", function(){ return pro.split_lines(result, options.max_line_length) });
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}
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return result;
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} catch(ex) {
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sys.debug(ex.stack);
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sys.debug(sys.inspect(ex));
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sys.debug(JSON.stringify(ex));
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}
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};
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function time_it(name, cont) {
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if (!options.verbose)
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return cont();
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var t1 = new Date().getTime();
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try { return cont(); }
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finally { sys.debug("// " + name + ": " + ((new Date().getTime() - t1) / 1000).toFixed(3) + " sec."); }
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};
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