esprimaq

esprimaq (BETA)

Query esprima ASTs by using a chainable query syntax.

Install

  npm install esprimaq

Usage

var find = require('esprimaq');

Find function calls of the mongo function:

var syntax = esprima.parse("mongo('hello');", {tolerant: true});
var result = find(syntax).callFn('mongo').exec();
assert.equal('hello', result[0].arguments[0].value);

Find variable declarations of x:

var syntax = esprima.parse("var x = 5;", {tolerant: true});
var result = find(syntax).varDecl('x').exec();
assert.equal('5', result[0].init.value);

Find calls to hello.bye:

var syntax = esprima.parse("hello.bye(w00t);", {tolerant: true});
var result = find(syntax).callMethod('hello', 'bye').exec();
assert.equal('w00t', result[0].arguments[0].name);

Find calls using this:

var syntax = esprima.parse('this.foo(bar);', {tolerant: true});
var result = find(syntax).callThisMethod('foo').exec();
assert.equal('bar', result[0].arguments[0].name);

TODO

• Implement tons of selectors:
  • Identifier
  • CallExpression
  • ExpressionStatement
  • AssignmentExpression
  • Literal
  • Property
  • Identifier
  • among others
• Implement way of doing AND in queries

FAQ

Why another esprima query/selector library?

I wanted a simpler and CSS-selector-free alternative to query esprima ASTs.

Do you know any cool CSS-based alternatives?

Yes, check these projects:

• esquery
• esprima-selector

Changelog

0.1.0

Added

• Adding support for callThisMethod, fnExpressions and identifiers filters.

0.0.1

• Initial Release

License

(The MIT License)

Copyright (c) 2014-2016 Alberto Pose < albertopose at gmail.com >

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.