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Reduce nested code where possible in build.js.

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Former-commit-id: 6604a798be84656158957cca0697a208f97ca4f4
This commit is contained in:
John-David Dalton
2013-06-30 13:17:57 -07:00
parent 028c25afd3
commit da17e424ea
1 changed files with 124 additions and 133 deletions
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137
build.js
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@@ -3499,8 +3499,9 @@
if (isTemplate) {
source = buildTemplate(templatePattern, templateSettings);
}
else {
if (isModern || isUnderscore) {
else if (isModern || isUnderscore) {
source = removeFromCreateIterator(source, 'support');
iteratorOptions.forEach(function(prop) {
if (prop != 'array') {
source = removeFromGetObject(source, prop);
@@ -3522,6 +3523,52 @@
}
});
// inline `iteratorTemplate` template
source = replaceFunction(source, 'iteratorTemplate', (function() {
var snippet = cleanupCompiled(getFunctionSource(lodash._iteratorTemplate));
// prepend data object references to property names to avoid having to
// use a with-statement
iteratorOptions.forEach(function(prop) {
if (prop !== 'support') {
snippet = snippet.replace(RegExp('([^\\w.])' + prop + '\\b', 'g'), '$1obj.' + prop);
}
});
// remove unnecessary code
snippet = snippet
.replace(/var __t.+/, "var __p = '';")
.replace(/function print[^}]+}/, '')
.replace(/'(?:\\n|\s)+'/g, "''")
.replace(/__p *\+= *' *';/g, '')
.replace(/\s*\+\s*'';/g, ';')
.replace(/(__p *\+= *)' *' *\+/g, '$1')
.replace(/\(\(__t *= *\( *([\s\S]+?) *\)\) *== *null *\? *'' *: *__t\)/g, '($1)');
// remove the with-statement
snippet = snippet.replace(/^ *with *\(.+?\) *{\n/m, '\n').replace(/}([^}]*}[^}]*$)/, '$1');
// minor cleanup
snippet = snippet
.replace(/obj\s*\|\|\s*\(obj *= *{}\);/, '')
.replace(/var __p = '';\s*__p \+=/, 'var __p =');
// remove comments, including sourceURLs
snippet = snippet.replace(/\s*\/\/.*(?:\n|$)/g, '');
// replace `iteratorTemplate` assignment
snippet = 'var iteratorTemplate = ' + snippet + ';\n';
return snippet;
}()));
// remove `iteratorTemplate` dependency checks from `_.template`
source = source.replace(matchFunction(source, 'template'), function(match) {
return match
.replace(/iteratorTemplate *&& */g, '')
.replace(/iteratorTemplate\s*\?\s*([^:]+?)\s*:[^,;]+/g, '$1');
});
if (isUnderscore) {
// unexpose "exit early" feature of `basicEach`, `_.forEach`, `_.forIn`, and `_.forOwn`
_.each(['basicEach', 'forEach', 'forIn', 'forOwn'], function(methodName) {
@@ -3585,76 +3632,19 @@
});
}
// remove `_.assign`, `_.forIn`, `_.forOwn`, `_.isPlainObject`, `_.unzip`, and `_.zipObject` assignments
(function() {
var snippet = getMethodAssignments(source),
modified = snippet;
_.each(['assign', 'createCallback', 'forIn', 'forOwn', 'isPlainObject', 'unzip', 'zipObject'], function(methodName) {
if (!isLodashMethod(methodName)) {
modified = modified.replace(RegExp('^(?: *//.*\\s*)* *lodash\\.' + methodName + ' *=[\\s\\S]+?;\\n', 'm'), '');
}
source = source.replace(getMethodAssignments(source), function(match) {
return _.reduce(['assign', 'createCallback', 'forIn', 'forOwn', 'isPlainObject', 'unzip', 'zipObject'], function(result, methodName) {
return isLodashMethod(methodName)
? result
: result.replace(RegExp('^(?: *//.*\\s*)* *lodash\\.' + methodName + ' *=[\\s\\S]+?;\\n', 'm'), '');
}, match);
});
source = source.replace(snippet, function() {
return modified;
});
}());
}
}
source = removeFromCreateIterator(source, 'support');
// inline `iteratorTemplate` template
source = replaceFunction(source, 'iteratorTemplate', (function() {
var snippet = cleanupCompiled(getFunctionSource(lodash._iteratorTemplate));
// prepend data object references to property names to avoid having to
// use a with-statement
iteratorOptions.forEach(function(prop) {
if (prop !== 'support') {
snippet = snippet.replace(RegExp('([^\\w.])' + prop + '\\b', 'g'), '$1obj.' + prop);
}
});
// remove unnecessary code
snippet = snippet
.replace(/var __t.+/, "var __p = '';")
.replace(/function print[^}]+}/, '')
.replace(/'(?:\\n|\s)+'/g, "''")
.replace(/__p *\+= *' *';/g, '')
.replace(/\s*\+\s*'';/g, ';')
.replace(/(__p *\+= *)' *' *\+/g, '$1')
.replace(/\(\(__t *= *\( *([\s\S]+?) *\)\) *== *null *\? *'' *: *__t\)/g, '($1)');
// remove the with-statement
snippet = snippet.replace(/^ *with *\(.+?\) *{\n/m, '\n').replace(/}([^}]*}[^}]*$)/, '$1');
// minor cleanup
snippet = snippet
.replace(/obj\s*\|\|\s*\(obj *= *{}\);/, '')
.replace(/var __p = '';\s*__p \+=/, 'var __p =');
// remove comments, including sourceURLs
snippet = snippet.replace(/\s*\/\/.*(?:\n|$)/g, '');
// replace `iteratorTemplate` assignment
snippet = 'var iteratorTemplate = ' + snippet + ';\n';
return snippet;
}()));
// remove `iteratorTemplate` dependency checks from `_.template`
source = source.replace(matchFunction(source, 'template'), function(match) {
return match
.replace(/iteratorTemplate *&& */g, '')
.replace(/iteratorTemplate\s*\?\s*([^:]+?)\s*:[^,;]+/g, '$1');
});
}
/*------------------------------------------------------------------------*/
// customize Lo-Dash's export bootstrap
(function() {
if (!isAMD) {
source = source.replace(/(?: *\/\/.*\n)*( *)if *\(typeof +define[\s\S]+?else /, '$1');
}
@@ -3674,22 +3664,21 @@
} else {
source = source.replace(/(?: *\/\/.*\n)* *(?:else )?if *\(freeExports.*?\) *{\s*}(?:\s*else *{([\s\S]+?) *})?\n+/, '$1\n');
}
}());
/*------------------------------------------------------------------------*/
// customize Lo-Dash's IIFE
(function() {
if (isIIFE) {
source = (function() {
var token = '%output%',
index = iife.indexOf(token);
source = source.match(/^\/\**[\s\S]+?\*\/\n/) +
return source.match(/^\/\**[\s\S]+?\*\/\n/) +
(index > -1 ? iife.slice(0, index) : iife) +
source.replace(/^[\s\S]+?\(function[^{]+?{|}\(this\)\)[;\s]*$/g, '') +
(index > -1 ? iife.slice(index + token.length) : '')
}
(index > -1 ? iife.slice(index + token.length) : '');
}());
}
/*------------------------------------------------------------------------*/
@@ -3722,7 +3711,7 @@
].join('\n' + indent);
});
}
if (!_.contains(includeVars, 'templateSettings') && isExcluded('template')) {
if (isExcluded('template') && !_.contains(includeProps, 'templateSettings')) {
source = removeTemplateSettings(source);
}
if (isExcluded('value')) {
@@ -3753,10 +3742,12 @@
}
if (isNoDep) {
source = removeFromCreateIterator(source, 'lodash');
source = removeGetIndexOf(source);
// remove`lodash` namespace from properties
// convert the `lodash.templateSettings` property assignment to a variable assignment
source = source.replace(/\b(lodash\.)(?=templateSettings *=)/, 'var ');
// remove the `lodash` namespace from properties
source = source.replace(/\blodash\.(\w+)\b(?!\s*=)/g, '$1');
// remove all horizontal rule comment separators