I know you've been asking for 'a tool'; but I think it's better to use just esprima itself and the various general purpose tools on top of esprima, and roll your own renamer. Because it's really really easy, and then you have more control. Here is a complete example in just 12 lines of code. It uses escodegen and estraverse, both on github, and, as far as I can see kind of 'the standard' to use in conjunction with esprima. While esprima essentially gives the parse function string -> abstract syntax tree, escodegen essentially gives the reverse of that, i.e. abstract syntax tree -> string. And estraverse 'walks the tree' with the traverse method, thus helping to analyze or modify it.
Here the code:
function rename(code, renamingObj){
var ast = esprima.parse(code);
function callback(node){
if (node.type==='Identifier') {
if (node.name in renamingObj){
node.name = renamingObj[node.name];
}
}
}
estraverse.traverse(ast, { enter: callback });
return escodegen.generate(ast);
}
Testcase:
function blah(x,y){
var difference = x + y;
var product = x - y;
var sum = x * y;
return 42;
}
var renamingObj = {
sum : 'product',
difference : 'sum',
product : 'difference'
};
run it:
rename(blah.toString(), renamingObj)
output:
function blah(x, y) {
var sum = x + y;
var difference = x - y;
var product = x * y;
return 42;
}
I would say, if you have something special to do, it's easier to modify above code than sifting through some tool documentation.
shift+F6in PHPStorm (and probably most other IDEs) – Sophocles