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build.js: Automatically save the smallest minified distribution as lodash.min.js.

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Former-commit-id: 1cbfa78f89a42f8f9dbe72a90adc4abeb2de3cb3
This commit is contained in:
Kit Cambridge
2012-04-23 13:29:43 -06:00
parent 2438210187
commit 292b0bbe49
1 changed files with 46 additions and 47 deletions
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93
build.js
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@@ -107,35 +107,6 @@
compressor.stdin.end(source); compressor.stdin.end(source);
} }
/**
* Compresses a `source` string using UglifyJS. Yields the result to a
* `callback` function. This function is synchronous; the `callback` is used
* for symmetry.
*
* @private
* @param {String} source The JavaScript source to minify.
* @param {Function} callback The function called when minifying is complete.
*/
function uglify(source, callback) {
var ugly = uglifyJS.uglify;
var result = ugly.gen_code(
// enable unsafe transformations.
ugly.ast_squeeze_more(
ugly.ast_squeeze(
// munge variable and function names, excluding the special `define`
// function exposed by AMD loaders.
ugly.ast_mangle(uglifyJS.parser.parse(source), {
'except': ['define']
}
))), {
'ascii_only': true
});
// split lines at 500 characters to be consistent with Closure Compiler
callback(ugly.split_lines(result, 500));
}
/*--------------------------------------------------------------------------*/ /*--------------------------------------------------------------------------*/
// create the destination directory if it doesn't exist // create the destination directory if it doesn't exist
@@ -144,35 +115,63 @@
} }
// compress and `gzip` Lo-Dash using the Closure Compiler // compress and `gzip` Lo-Dash using the Closure Compiler
compile(source, function(exception, result) { compile(source, function(exception, compiledSource) {
if (exception) { if (exception) {
throw exception; throw exception;
} }
// post-process the minified source
var source = postprocess(result);
// save the final minified version // post-process the compiled source
fs.writeFileSync(path.join(distPath, 'lodash.compiler.js'), source); compiledSource = postprocess(compiledSource);
// save the `gzip`-ed version // save the final compiled version
gzip(source, function(exception, result) { fs.writeFileSync(path.join(distPath, 'lodash.compiler.js'), compiledSource);
// `gzip` the compiled version
gzip(compiledSource, function gzipCompiled(exception, result) {
if (exception) { if (exception) {
throw exception; throw exception;
} }
// record the size of the compiled version
var compiledSize = result.length;
// explicit `binary` encoding is necessary to ensure that the stream is written correctly // explicit `binary` encoding is necessary to ensure that the stream is written correctly
fs.writeFileSync(path.join(distPath, 'lodash.compiler.js.gz'), result, 'binary'); fs.writeFileSync(path.join(distPath, 'lodash.compiler.js.gz'), result, 'binary');
});
});
// compress and `gzip` Lo-Dash using UglifyJS // compress Lo-Dash using UglifyJS
uglify(source, function(result) { var ugly = uglifyJS.uglify,
var source = postprocess(result); uglifiedSource = ugly.gen_code(
fs.writeFileSync(path.join(distPath, 'lodash.uglify.js'), source); // enable unsafe transformations
gzip(source, function(exception, result) { ugly.ast_squeeze_more(
if (exception) { ugly.ast_squeeze(
throw exception; // munge variable and function names, excluding the special `define`
} // function exposed by AMD loaders
fs.writeFileSync(path.join(distPath, 'lodash.uglify.js.gz'), result, 'binary'); ugly.ast_mangle(uglifyJS.parser.parse(source), {
'except': ['define']
}
))), {
'ascii_only': true
});
// post-process the uglified source and split lines at 500 characters for
// consistency with Closure Compiler
uglifiedSource = postprocess(ugly.split_lines(uglifiedSource, 500));
// save the uglified version
fs.writeFileSync(path.join(distPath, 'lodash.uglify.js'), uglifiedSource);
// `gzip` the uglified version
gzip(uglifiedSource, function gzipUglified(exception, result) {
if (exception) {
throw exception;
}
var uglifiedSize = result.length;
fs.writeFileSync(path.join(distPath, 'lodash.uglify.js.gz'), result, 'binary');
// select the smallest minified distribution and use it as the official
// minified release
fs.writeFileSync(path.join(__dirname, "lodash.min.js"), compiledSize < uglifiedSize ? compiledSource : uglifiedSource);
});
}); });
}); });
}()); }());