JoBoEVD/UglifyJS
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implement --name-cache

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alexlamsl 2017-04-15 08:15:50 +08:00
parent 32561c1517
commit 66cebbf336
2 changed files with 47 additions and 16 deletions
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2
README.md
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@ -116,6 +116,7 @@ The available options are:
By default UglifyJS will not try to be IE-proof.
--keep-fnames Do not mangle/drop function names. Useful for
code relying on Function.prototype.name.
--name-cache File to hold mangled name mappings.
--self Build UglifyJS2 as a library (implies --wrap UglifyJS)
--source-map [options] Enable source map/specify source map options:
`base` Path to compute relative paths from input files.
@ -146,7 +147,6 @@ TODOs:
--reserved-file File containing reserved names
--reserve-domprops Make (most?) DOM properties reserved for
--mangle-props
--name-cache File to hold mangled names mappings
```
Specify `--output` (`-o`) to declare the output file. Otherwise the output

61
bin/uglifyjs
View File

@ -18,19 +18,20 @@ program._name = info.name;
program.version(info.version);
program.parseArgv = program.parse;
program.parse = undefined;
program.option("-p, --parse <options>", "Specify parser options.", parseJS("parse", true));
program.option("-c, --compress [options]", "Enable compressor/specify compressor options.", parseJS("compress", true));
program.option("-m, --mangle [options]", "Mangle names/specify mangler options.", parseJS("mangle", true));
program.option("--mangle-props [options]", "Mangle properties/specify mangler options.", parseJS("mangle-props", true));
program.option("-b, --beautify [options]", "Beautify output/specify output options.", parseJS("beautify", true));
program.option("-p, --parse <options>", "Specify parser options.", parse_js("parse", true));
program.option("-c, --compress [options]", "Enable compressor/specify compressor options.", parse_js("compress", true));
program.option("-m, --mangle [options]", "Mangle names/specify mangler options.", parse_js("mangle", true));
program.option("--mangle-props [options]", "Mangle properties/specify mangler options.", parse_js("mangle-props", true));
program.option("-b, --beautify [options]", "Beautify output/specify output options.", parse_js("beautify", true));
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.", parseJS("define"));
program.option("-d, --define <expr>[=value]", "Global definitions.", parse_js("define"));
program.option("--ie8", "Support non-standard Internet Explorer 8.");
program.option("--keep-fnames", "Do not mangle/drop function names. Useful for code relying on Function.prototype.name.");
program.option("--name-cache <file>", "File to hold mangled name mappings.");
program.option("--self", "Build UglifyJS2 as a library (implies --wrap UglifyJS)");
program.option("--source-map [options]", "Enable source map/specify source map options.", parseSourceMap());
program.option("--source-map [options]", "Enable source map/specify source map options.", parse_source_map());
program.option("--stats", "Display operations run time on STDERR.")
program.option("--toplevel", "Compress and/or mangle variables in toplevel scope.");
program.option("--verbose", "Print diagnostic messages.");
@ -38,7 +39,7 @@ 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(readFile(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");
@ -79,6 +80,18 @@ if (program.mangleProps) {
if (typeof options.mangle != "object") options.mangle = {};
options.mangle.properties = program.mangleProps;
}
var cache;
if (program.nameCache) {
cache = JSON.parse(read_file(program.nameCache, "{}"));
if (options.mangle) {
if (typeof options.mangle != "object") options.mangle = {};
options.mangle.cache = to_cache("vars");
if (options.mangle.properties) {
if (typeof options.mangle.properties != "object") options.mangle.properties = {};
options.mangle.properties.cache = to_cache("props");
}
}
}
if (program.parse) {
if (program.parse.acorn || program.parse.spidermonkey) {
if (program.sourceMap) fatal("ERROR: inline source map only works with built-in parser");
@ -109,12 +122,12 @@ if (program.self) {
}
if (!options.wrap) options.wrap = "UglifyJS";
simple_glob(UglifyJS.FILES).forEach(function(name) {
files[convert_path(name)] = readFile(name);
files[convert_path(name)] = read_file(name);
});
run();
} else if (program.args.length) {
simple_glob(program.args).forEach(function(name) {
files[convert_path(name)] = readFile(name);
files[convert_path(name)] = read_file(name);
});
run();
} else {
@ -189,6 +202,11 @@ function run() {
} else {
console.log(result.code);
}
if (program.nameCache) {
fs.writeFileSync(program.nameCache, JSON.stringify(cache, function(key, value) {
return value instanceof UglifyJS.Dictionary ? value.toObject() : value;
}));
}
if (program.stats) console.error("Elapsed:", Date.now() - program.stats);
}
@ -228,15 +246,16 @@ function simple_glob(glob) {
return [ glob ];
}
function readFile(path) {
function read_file(path, default_value) {
try {
return fs.readFileSync(path, "utf8");
} catch (ex) {
if (ex.code == "ENOENT" && default_value != null) return default_value;
fatal("ERROR: " + ex.message);
}
}
function parseJS(flag, constants) {
function parse_js(flag, constants) {
return function(value, options) {
options = options || {};
try {
@ -273,15 +292,27 @@ function parseJS(flag, constants) {
}
}
function parseSourceMap() {
var parse = parseJS("sourceMap", true);
function parse_source_map() {
var parse = parse_js("sourceMap", true);
return function(value, options) {
var hasContent = options && options.sourceMap && "content" in options.sourceMap;
var settings = parse(value, options);
if (!hasContent && settings.content && settings.content != "inline") {
console.error("INFO: Using input source map:", settings.content);
settings.content = readFile(settings.content);
settings.content = read_file(settings.content);
}
return settings;
}
}
function to_cache(key) {
if (cache[key]) {
cache[key].props = UglifyJS.Dictionary.fromObject(cache[key].props);
} else {
cache[key] = {
cname: -1,
props: new UglifyJS.Dictionary()
};
}
return cache[key];
}