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Cleanup code and rework the pre-compile step.

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Former-commit-id: cb62236ee0396e5e08defcbfee526265f9cf042e
This commit is contained in:
John-David Dalton
2012-05-08 12:15:01 -04:00
parent 4c29fbb36d
commit 5c82104d7b
4 changed files with 228 additions and 188 deletions
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118
build/pre-compile.js
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@@ -5,7 +5,7 @@
/** The Node filesystem module */
var fs = require('fs');
/** Used to minify string values used by `iterationFactory` and its options */
/** Used to minify string values used by `compileIterator` and its options */
var compiledValues = [
'arrays',
'objects'
@@ -55,18 +55,24 @@
'value'
];
/** Used to minify `iterationFactory` option properties */
var iterationFactoryOptions = [
/** Used to minify `compileIterator` option properties */
var iteratorOptions = [
'args',
'array',
'arrayBranch',
'beforeLoop',
'bottom',
'exit',
'firstArg',
'hasExp',
'hasDontEnumBug',
'inLoop',
'init',
'iterate',
'iteratedObject',
'loopExp',
'object',
'objectBranch',
'top',
'useHas'
];
@@ -113,7 +119,7 @@
// add brackets to whitelisted properties so Closure Compiler won't mung them.
// http://code.google.com/closure/compiler/docs/api-tutorial3.html#export
source = source.replace(RegExp('\\.(' + iterationFactoryOptions.concat(propWhitelist).join('|') + ')\\b', 'g'), "['$1']");
source = source.replace(RegExp('\\.(' + propWhitelist.join('|') + ')\\b', 'g'), "['$1']");
// remove whitespace from string literals
source = source.replace(/'(?:(?=(\\?))\1.)*?'/g, function(string) {
@@ -122,10 +128,10 @@
});
});
// minify `sortBy` and `template` methods
['sortBy', 'template'].forEach(function(methodName) {
// minify `_.sortBy` internal properties
(function() {
var properties = ['criteria', 'value'],
snippet = source.match(RegExp('(\\n\\s*)function ' + methodName + '[\\s\\S]+?\\1}'))[0],
snippet = source.match(RegExp('( +)function sortBy[\\s\\S]+?\\n\\1}'))[0],
result = snippet;
// minify property strings
@@ -135,36 +141,60 @@
// replace with modified snippet
source = source.replace(snippet, result);
});
}());
// minify all `iterationFactory` related snippets
// minify all compilable snippets
source.match(
RegExp([
// match variables storing `iterationFactory` options
'var [a-zA-Z]+FactoryOptions\\s*=\\s*\\{[\\s\\S]+?};\\n',
// match the the `iterationFactory` function
'(\\n\\s*)function iterationFactory[\\s\\S]+?\\1}',
// match methods created by `iterationFactor` calls
'iterationFactory\\((?:[\'{]|[a-zA-Z]+,)[\\s\\S]+?\\);\\n'
// match the `iterationTemplate`
'( +)var iteratorTemplate[\\s\\S]+?\\n\\1}',
// match variables storing `createIterator` options
'( +)var [a-zA-Z]+IteratorOptions[\\s\\S]+?\\n\\2}',
// match the the `createIterator` function
'( +)function createIterator[\\s\\S]+?\\n\\3}',
// match methods created by `createIterator` calls
'createIterator\\((?:[\'{]|[a-zA-Z]+,)[\\s\\S]+?\\);\\n'
].join('|'), 'g')
)
.forEach(function(snippet, index) {
var result = snippet;
var isCreateIterator = /function createIterator/.test(snippet),
isIteratorTemplate = /var iteratorTemplate/.test(snippet),
result = snippet;
// add `true` and `false` arguments to be minified
if (/function iterationFactory/.test(snippet)) {
if (isIteratorTemplate) {
// minify delimiters
result = result
.replace(/(Function\('[\s\S]+?)undefined/, '$1true,false,undefined')
.replace(/\)\([^)]+/, '$&,true,false');
.replace(/<%=/g, '#')
.replace(/<%/g, '@')
.replace(/%>/g, '%');
// replace with modified snippet early and clip snippet
source = source.replace(snippet, result);
snippet = result = result.replace(/\)\([\s\S]+$/, '');
// minify delimiter regexps
result = result
.replace(/('evaluate':)[^,}]+/, '$1/@([\\s\\S]+?)%/g')
.replace(/('interpolate':)[^,}]+/, '$1/#([\\s\\S]+?)%/g');
}
else {
// add brackets to whitelisted properties so Closure Compiler won't mung them.
// http://code.google.com/closure/compiler/docs/api-tutorial3.html#export
result = result.replace(RegExp('\\.(' + iteratorOptions.join('|') + ')\\b', 'g'), "['$1']");
}
// minify snippet variables/arguments
if (isCreateIterator) {
// add `true` and `false` arguments to be minified
result = result
.replace(/(Function\(\s*'[\s\S]+?)undefined/, '$1true,false,undefined')
.replace(/factory\([^)]+/, '$&,true,false');
// replace with modified snippet early and clip snippet so other arguments
// aren't minified
source = source.replace(snippet, result);
snippet = result = result.replace(/factory\([\s\S]+$/, '');
}
// minify snippet variables / arguments
compiledVars.forEach(function(variable, index) {
result = result.replace(RegExp('([^.]\\b|\\\\n)' + variable + '\\b(?!\'\\s*[\\]:])', 'g'), '$1' + minNames[index]);
// ensure properties aren't minified
result = result.replace(RegExp('([^.]\\b|\\\\n)' + variable + '\\b(?!\' *[\\]:])', 'g'), '$1' + minNames[index]);
// correct `typeof x == 'object'`
if (variable == 'object') {
@@ -173,26 +203,35 @@
// correct boolean literals
if (variable == 'true' || variable == 'false') {
result = result
.replace(RegExp(':\\s*' + minNames[index] + '\\s*,', 'g'), ':' + variable + ',')
.replace(RegExp('\\s*' + minNames[index] + '\\s*;', 'g'), variable + ';');
}
if (variable == 'slice') {
// correct `slice.call(arguments)`
result = result.replace(RegExp('\\b' + minNames[index] + '(\\.call\\(arguments\\))'), 'slice$1');
.replace(RegExp(': *' + minNames[index] + ' *,', 'g'), ':' + variable + ',')
.replace(RegExp(' *' + minNames[index] + ' *;', 'g'), variable + ';');
}
});
// minify snippet values
// minify snippet string values
compiledValues.forEach(function(value, index) {
result = result.replace(RegExp("'" + value + "'", 'g'), "'" + minNames[index] + "'");
});
// minify iterationFactory option property strings
iterationFactoryOptions.forEach(function(property, index) {
if (property == 'array' || property == 'object') {
result = result.replace(RegExp("'" + property + "'(\\s*[\\]:])", 'g'), "'" + minNames[index] + "'$1");
} else {
result = result.replace(RegExp("'" + property + "'", 'g'), "'" + minNames[index] + "'");
// minify `createIterator` option property names
iteratorOptions.forEach(function(property, index) {
if (isIteratorTemplate) {
// minify property names and accessors
result = result.replace(RegExp('\\b' + property + '\\b', 'g'), minNames[index]);
}
else {
if (property == 'array' || property == 'object') {
// minify "array" and "object" sub property names
result = result.replace(RegExp("'" + property + "'(\\s*[\\]:])", 'g'), "'" + minNames[index] + "'$1");
}
else {
// minify property name strings
result = result.replace(RegExp("'" + property + "'", 'g'), "'" + minNames[index] + "'");
// minify property names in regexps and accessors
if (isCreateIterator) {
result = result.replace(RegExp('([\\.|/])' + property + '\\b' , 'g'), '$1' + minNames[index]);
}
}
}
});
@@ -208,7 +247,8 @@
// expose `preprocess`
if (module != require.main) {
module.exports = preprocess;
} else {
}
else {
// read the JavaScript source file from the first argument if the script
// was invoked directly (e.g. `node pre-compile.js source.js`) and write to
// the same file