Mirrors/lodash
1
0
Fork 0
mirror of https://github.com/whoisclebs/lodash.git synced 2026-02-01 15:57:48 +00:00
Code Issues Packages Projects Releases Wiki Activity

Add "strict" build.

Browse Source 
Former-commit-id: fcdd8d36c9e0c6d698059541b97915ae1b28650e
This commit is contained in:
John-David Dalton
2012-07-14 08:59:50 -04:00
parent c9c83ee7e6
commit e58d47a3b2
1 changed files with 43 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
build.js
View File

@@ -20,8 +20,14 @@
/** Flag used to specify a mobile build */
var isMobile = !isLegacy && process.argv.indexOf('mobile') > -1;
/** Flag used to specify if the source should be in strict mode */
var isStrict = !(isLegacy || isMobile);
/**
* Flag used to specify `_.bindAll`, `_.extend`, and `_.defaults` are
* constructed using the "use strict" directive.
*/
var isStrict = process.argv.indexOf('strict') > -1;
/** Flag used to specify if the build should include the "use strict" directive */
var useStrict = isStrict || !(isLegacy || isMobile);
/** Shortcut used to convert array-like objects to arrays */
var slice = [].slice;
@@ -32,19 +38,19 @@
/** Load customized Lo-Dash module */
var lodash = (function() {
var sandbox = {};
if (isStrict) {
source = setUseStrictOption(source, true);
}
else if (!useStrict) {
source = removeUseStrictDirective(source);
source = setUseStrictOption(source, false);
}
if (isLegacy) {
['isBindFast', 'isKeysFast', 'nativeBind', 'nativeIsArray', 'nativeKeys'].forEach(function(varName) {
source = replaceVar(source, varName, 'false');
});
// remove `useStrict` branch from `iteratorTemplate`
source = source.replace(/(?: *\/\/.*\n)*\s*' *<% *if *\(useStrict\).+\n/, '');
// remove `useStrict` from iterator options
source = source.replace(/ *'useStrict': *false,\n/g, '');
// remove `useStrict` data object property assignment in `createIterator`
source = source.replace(/\s*.+?\.useStrict *=.+/, '');
}
else if (isMobile) {
source = replaceVar(source, 'isKeysFast', 'false');
@@ -285,6 +291,7 @@
' lodash backbone Build containing all methods required by Backbone',
' lodash legacy Build tailored for older browsers without ES5 support',
' lodash mobile Build with IE < 9 bug fixes and method compilation removed',
' lodash strict Build with `_.bindAll`, `_.extend`, and `_.defaults` in strict mode',
' 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 include=... Comma separated names of methods to include in the build',
@@ -507,14 +514,14 @@
*/
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')
// remove `isKeysFast` from `beforeLoop.object` of `mapIteratorOptions`
.replace(/=\s*'\s*\+\s*\(isKeysFast.+/, "= []'")
// remove `isKeysFast` from `inLoop.object` of `mapIteratorOptions`, `invoke`, `pluck`, and `sortBy`
.replace(/'\s*\+\s*\(isKeysFast[^)]+?\)\s*\+\s*'/g, '.push')
// remove data object property assignment in `createIterator`
.replace(/\s*.+?\.isKeysFast *=.+/, '')
// remove optimized branch in `iteratorTemplate`
.replace(/(?: *\/\/.*\n)*\s*'( *)<% *if *\(isKeysFast[\s\S]+?'\1<% *} *else *\{ *%>.+\n([\s\S]+?) *'\1<% *} *%>.+/, '$2');
.replace(/\s*.+?\.isKeysFast *=.+/, '');
}
/**
@@ -524,7 +531,7 @@
* @param {String} source The source to process.
* @returns {String} Returns the modified source.
*/
function removeUseStrict(source) {
function removeUseStrictDirective(source) {
return source.replace(/(["'])use strict\1;( *\n)?/, '');
}
@@ -584,6 +591,24 @@
return source;
}
/**
* Hard-codes the `useStrict` template option value for `iteratorTemplate`.
*
* @private
* @param {String} source The source to process.
* @param {Boolean} value The value to set.
* @returns {String} Returns the modified source.
*/
function setUseStrictOption(source, value) {
return source
// replace `useStrict` branch in `value` with hard-coded option
.replace(/(?: *\/\/.*\n)*(\s*)' *<% *if *\(useStrict\).+/, value ? "$1'\\'use strict\\';\\n' +" : '')
// remove `useStrict` from iterator options
.replace(/ *'useStrict': *false,\n/g, '')
// remove `useStrict` data object property assignment in `createIterator`
.replace(/\s*.+?\.useStrict *=.+/, '');
}
/*--------------------------------------------------------------------------*/
// display help message
@@ -961,18 +986,14 @@
// cleanup code
source = source.replace(/^ *;\n/gm, '');
if (!isStrict) {
source = removeUseStrict(source);
}
// begin the minification process
if (filterType || isBackbone || isLegacy || isMobile) {
if (filterType || isBackbone || isLegacy || isMobile || isStrict) {
fs.writeFileSync(path.join(cwd, 'lodash.custom.js'), source);
minify(source, 'lodash.custom.min', function(result) {
// re-remove "use strict" added by the minifier
if (!isStrict) {
result = removeUseStrict(result);
if (!useStrict) {
result = removeUseStrictDirective(result);
}
fs.writeFileSync(path.join(cwd, 'lodash.custom.min.js'), result);
});