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Add "exports" option to build.js.

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Former-commit-id: cc1572dbe9d1367f806a44597cbcec8508f51ad6
This commit is contained in:
John-David Dalton
2012-09-09 13:12:44 -07:00
parent 78471b4595
commit e16918ee32
1 changed files with 88 additions and 49 deletions
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137
build.js
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@@ -237,10 +237,18 @@
'where'
]));
/** List of ways to export the `LoDash` function */
var exportsAll = [
'amd',
'commonjs',
'global',
'node'
];
/*--------------------------------------------------------------------------*/
/**
* Removes unnecessary comments and whitespace.
* Removes unnecessary comments, whitespace, and pseudo private properties.
*
* @private
* @param {String} source The source to process.
@@ -248,6 +256,8 @@
*/
function cleanupSource(source) {
return source
// remove pseudo private properties
.replace(/(?:(?:\s*\/\/.*)*\s*lodash\._[^=]+=.+\n)+/g, '\n')
// remove lines with just whitespace and semicolons
.replace(/^ *;\n/gm, '')
// consolidate consecutive horizontal rule comment separators
@@ -274,6 +284,7 @@
' lodash underscore Build with only methods included in Underscore without iteration fixes',
' lodash category=... Comma separated categories of methods to include in the build',
' lodash exclude=... Comma separated names of methods to exclude from the build',
' lodash exports=... Comma separated names of ways to export the `LoDash` function',
' lodash include=... Comma separated names of methods to include in the build',
'',
' All arguments, except `exclude` with `include` & `legacy` with `csp`/`mobile`,',
@@ -283,7 +294,7 @@
'',
' -c , --stdout Write output to standard output',
' -h, --help Display help information',
' -o, --output Write output to a given filename/path',
' -o, --output Write output to a given path/filename',
' -s, --silent Skip status updates normally logged to the console',
' -V, --version Output current version of Lo-Dash',
''
@@ -521,7 +532,7 @@
function removeKeysOptimization(source) {
return removeVar(source, 'isKeysFast')
// remove optimized branch in `iteratorTemplate`
.replace(/(?: *\/\/.*\n)*\s*'( *)<% *if *\(isKeysFast[\s\S]+?'\1<% *} *else *\{ *%>.+\n([\s\S]+?) *'\1<% *} *%>.+/, '$2')
.replace(/(?: *\/\/.*\n)* *'( *)<% *if *\(isKeysFast[\s\S]+?'\1<% *} *else *\{ *%>.+\n([\s\S]+?) *'\1<% *} *%>.+/, '$2')
// remove `isKeysFast` from `beforeLoop.object` of `mapIteratorOptions`
.replace(/=\s*'\s*\+\s*\(isKeysFast.+/, "= []'")
// remove `isKeysFast` from `inLoop.object` of `mapIteratorOptions`, `invoke`, `pairs`, `pluck`, and `sortBy`
@@ -701,9 +712,60 @@
// the lodash.js source
var source = fs.readFileSync(path.join(__dirname, 'lodash.js'), 'utf8');
// used to specify the ways to export the `LoDash` function
var exportsOptions = options.reduce(function(result, value) {
var match = value.match(/^exports=(.*)$/);
if (!match) {
return result;
}
return match[1].split(/, */).sort();
}, exportsAll.slice());
// used to specify whether filtering is for exclusion or inclusion
var filterType = options.reduce(function(result, value) {
if (result) {
return result;
}
var pair = value.match(/^(exclude|include)=(.*)$/);
if (!pair) {
return result;
}
// remove nonexistent method names
var methodNames = _.intersection(allMethods, pair[2].split(/, */).map(getRealName));
if (pair[1] == 'exclude') {
excludeMethods = methodNames;
} else {
includeMethods = methodNames;
}
// return `filterType`
return pair[1];
}, '');
// used to report invalid command-line arguments
var invalidArgs = _.reject(options.slice(options[0] == 'node' ? 2 : 0), function(value, index) {
if (/^(?:category|exclude|exports|include)=.*$/.test(value)) {
return true;
}
return [
'backbone',
'csp',
'legacy',
'lodash',
'mobile',
'strict',
'underscore',
'-c', '--stdout',
'-h', '--help',
'-o', '--output',
'-s', '--silent',
'-V', '--version'
].indexOf(value) > -1;
});
// load customized Lo-Dash module
var lodash = (function() {
var context = _.extend(vm.createContext(), {
var context = vm.createContext({
'clearTimeout': clearTimeout,
'setTimeout': setTimeout
});
@@ -765,47 +827,6 @@
return context._;
}());
// used to specify whether filtering is for exclusion or inclusion
var filterType = options.reduce(function(result, value) {
if (result) {
return result;
}
var pair = value.match(/^(exclude|include)=(.*)$/);
if (!pair) {
return result;
}
// remove nonexistent method names
var methodNames = _.intersection(allMethods, pair[2].split(/, */).map(getRealName));
if (pair[1] == 'exclude') {
excludeMethods = methodNames;
} else {
includeMethods = methodNames;
}
// return `filterType`
return pair[1];
}, '');
// used to report invalid arguments
var invalidArgs = _.reject(options, function(value) {
if (/^(?:category|exclude|include)=.*$/.test(value)) {
return true;
}
return [
'backbone',
'csp',
'legacy',
'mobile',
'strict',
'underscore',
'-c', '--stdout',
'-h', '--help',
'-o', '--output',
'-s', '--silent',
'-V', '--version'
].indexOf(value) > -1;
});
// report invalid arguments
if (invalidArgs.length) {
console.log(
@@ -954,8 +975,6 @@
RegExp("{(\\\\n' *\\+\\s*.*?\\+\\n\\s*' *)}(?:\\\\n)?' *\\+", 'g'), "$1;\\n'+"
);
/*------------------------------------------------------------------------*/
// DRY out isType functions
(function() {
var iteratorName = _.find(['forEach', 'forOwn'], function(funcName) {
@@ -1144,6 +1163,24 @@
/*------------------------------------------------------------------------*/
if (exportsOptions.indexOf('amd') == -1) {
source = source.replace(/(?: *\/\/.*\n)*( +)if *\(typeof +define[\s\S]+?else /, '$1');
}
if (exportsOptions.indexOf('node') == -1) {
source = source.replace(/(?: *\/\/.*\n)* *if *\(typeof +module[\s\S]+?else *{\n([\s\S]+?) *}\n/, '$1');
}
if (exportsOptions.indexOf('commonjs') == -1) {
source = source.replace(/(?: *\/\/.*\n)*(?:( +)else *{)?\s*freeExports\._ *=.+(\n\1})?\n/, '');
}
if (exportsOptions.indexOf('global') == -1) {
source = source.replace(/(?:( +)else *{)?(?:\s*\/\/.*)*\s*window\._ *= *lodash.+(\n\1})?\n/g, '');
}
// remove `if (freeExports) {...}` if it's empty
source = source.replace(/(?: *\/\/.*\n)* *(?:else )?if *\(freeExports\) *{\s*}(?:\s*else *{\n([\s\S]+?) *})?/, '$1');
/*------------------------------------------------------------------------*/
// modify/remove references to removed methods/variables
if (isRemoved(source, 'isArguments')) {
source = replaceVar(source, 'noArgsClass', 'false');
@@ -1227,11 +1264,13 @@
source = source.replace(/ *\(function\(\) *{[\s\S]+?}\(1\)\);/, '');
}
/*------------------------------------------------------------------------*/
debugSource = cleanupSource(debugSource);
source = cleanupSource(source);
// begin the minification process
if (filterType || isBackbone || isLegacy || isMobile || isStrict || isUnderscore) {
if (!_.isEqual(exportsOptions, exportsAll) || filterType || isBackbone || isLegacy || isMobile || isStrict || isUnderscore) {
callback(path.join(cwd, 'lodash.custom.js'), debugSource);
minify(source, {
@@ -1265,7 +1304,7 @@
}
else {
// or invoked directly
build(process.argv.slice(2), function(filepath, source) {
build(process.argv, function(filepath, source) {
fs.writeFileSync(filepath, source, 'utf8');
});
}