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