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Add matchVar to build.js.

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Former-commit-id: a72f6fa81c9b7f862dc023efe8bd15ed3c2ba0ce
This commit is contained in:
John-David Dalton
2013-06-28 23:27:43 -07:00
parent e9e36cebcb
commit 6a74d102a4
1 changed files with 27 additions and 13 deletions
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40
build.js
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@@ -1229,23 +1229,12 @@
* @returns {Boolean} Returns `true` if the variable is used, else `false`.
*/
function isVarUsed(source, varName, isShallow) {
var indentA = isShallow ? ' {2}' : ' {2,4}',
indentB = isShallow ? ' {6}' : ' {6,8}';
var match = RegExp(
(varName != 'freeGlobal' && _.contains(complexVars, varName))
? '^' + indentA + 'var ' + varName + ' *=[\\s\\S]+?(?:\\(function[\\s\\S]+?\\(\\)\\);\\n(?=\\n)|[;}]\\n(?=\\n(?!\\s*\\(func)))'
: '^(' + indentA + ')var ' + varName + ' *(?:|= *(?:.+?(?:|&&\\n[^;]+)|(?:\\w+\\(|[{[(]\\n)[\\s\\S]+?\\n\\1[^\\n ]+?));\\n|' +
'^' + indentA + 'var ' + varName + ' *=.+?,\\n(?= *\\w+ *=)|' +
'^' + indentB + varName + ' *=.+?[,;]\\n'
, 'm')
.exec(source);
var match = matchVar(source, varName, isShallow);
if (!match) {
return false;
}
// remove the variable assignment from the source
source = source.slice(0, match.index) + source.slice(match.index + match[0].length);
source = source.replace(match, '');
return RegExp('[^\\w"\'.]' + varName + '\\b').test(source);
}
@@ -1286,6 +1275,31 @@
return /@type +Function|\b(?:function\s*\w*|createIterator|overloadWrapper)\(/.test(result) ? result[0] : '';
}
/**
* Searches `source` for a `varName` variable assignment and returns
* the matched snippet.
*
* @private
* @param {String} source The source to inspect.
* @param {String} varName The name of the variable to match.
* @param {Boolean} [isShallow=false] A flag to indicate looking for varaibles one closure deep.
* @returns {String} Returns the matched variable snippet.
*/
function matchVar(source, varName, isShallow) {
var indentA = isShallow ? ' {2}' : ' {2,4}',
indentB = isShallow ? ' {6}' : ' {6,8}';
var result = source.match(RegExp(
(varName != 'freeGlobal' && _.contains(complexVars, varName))
? '^' + indentA + 'var ' + varName + ' *=[\\s\\S]+?(?:\\(function[\\s\\S]+?\\(\\)\\);\\n(?=\\n)|[;}]\\n(?=\\n(?!\\s*\\(func)))'
: '^(' + indentA + ')var ' + varName + ' *(?:|= *(?:.+?(?:|&&\\n[^;]+)|(?:\\w+\\(|[{[(]\\n)[\\s\\S]+?\\n\\1[^\\n ]+?));\\n|' +
'^' + indentA + 'var ' + varName + ' *=.+?,\\n(?= *\\w+ *=)|' +
'^' + indentB + varName + ' *=.+?[,;]\\n'
, 'm'));
return result ? result[0] : '';
}
/**
* Converts a comma separated options string into an array.
*