acorn-umd

Parse acorn ast for AMD, CommonJS, and ES6 definitions.


The Nodes created align as closely as possible with the nodes generated for acorns ES6 import nodes. Example below

``js
var acorn = require('acorn');
var umd = require('acorn-umd');

var code =
import {a, b, c as d} from 'library';
import foo from 'foo-library';

let _ = require('lodash');
;

var ast = acorn.parse(code, {ecmaVersion: 6});
var imports = umd(ast, {
es6: true, amd: false, cjs: true
});

console.log(imports);
`

`js
[
{ type: 'CJSImport',
reference:
{ type: 'VariableDeclaration',
start: 87,
end: 113,
declarations: [Object],
kind: 'let' },
specifiers: [ [Object] ],
start: 87,
end: 113,
source:
{ type: 'Literal',
reference: [Object],
value: 'lodash',
raw: '\'lodash\'',
start: 103,
end: 111 }
},
{ type: 'ImportDeclaration',
start: 5,
end: 42,
specifiers: [ [Object], [Object], [Object] ],
source:
{ type: 'Literal',
start: 32,
end: 41,
value: 'library',
raw: '\'library\'' }
},
{ type: 'ImportDeclaration',
start: 47,
end: 77,
specifiers: [ [Object] ],
source:
{ type: 'Literal',
start: 63,
end: 76,
value: 'foo-library',
raw: '\'foo-library\'' }
}
]
`

AMD Imports

`js
let code =
foo();
define(['foo', 'unused-import'], function($) {
return $();
});
;

let ast = acorn.parse(code, {ecmaVersion: 6});
let parsed = umd(ast, {
es6: false, amd: true, cjs: false
});

console.log(parsed);

[
{
type: 'AMDImport',
reference: { DEFINE_NODE },
start: 12,
end: 81,

specifiers: [ { type: 'Identifier', start: 54, end: 55, name: '$' } ],
sources:
[ { type: 'Literal',
reference: [Object],
value: 'foo',
raw: '\'foo\'',
start: 20,
end: 25 },
{ type: 'Literal',
reference: [Object],
value: 'unused-import',
raw: '\'unused-import\'',
start: 27,
end: 42 } ],

// Grouped [source, variable] name array
imports: [ [ {SOURCE_NODE}, {VARIABLE_NODE} ], [ {SOURCE_NODE}, undefined ]
}
]
`

#### Get the scope of a node


`
import {sample} from 'lodash'

let parsed = umd(ast, {
es6: false, amd: true, cjs: false
});

let node = sample(parsed);

let scope = node.scope; // scope is null if global otherwise a function node
``