jscodeshift-add-imports
v1.0.11
Published
add imports/requires if not already present with jscodeshift
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jscodeshift-add-imports
Easily add import and require statements with jscodeshift. If something is already imported, returns the locally bound identifier, and avoids name conflicts.
Usage
npm install --save jscodeshift-add-imports
const j = require('jscodeshift')
const addImports = require('jscodeshift-add-imports')
const { statement } = j.template
const code = `
// @flow
import {foo, type bar} from 'foo'
import baz from 'baz'
`
const root = j(code)
const result = addImports(root, [
statement`import type {bar, baz} from 'foo'`,
statement`import blah, {type qux} from 'qux'`,
])
console.log(result)
console.log(root.toSource())
Output code:
// @flow
import { foo, type bar } from 'foo'
import baz from 'baz'
import type { baz as baz1 } from 'foo'
import blah, { type qux } from 'qux'
Return value:
{
bar: 'bar',
baz: 'baz1',
blah: 'blah',
qux: 'qux',
}
Compatibility
Currently tested on [email protected]
with the following parsers:
babylon
ts
There are currently issues with the babel
and flow
parsers.
It won't likely work with other custom parsers unless they output nodes in the same format as Babel for import declarations, variable declarations, require calls, and object patterns.
addImports(root, statments)
Arguments
root
The jscodeshift-wrapped AST of your source code
statements
The AST of an import declaration or variable declaration with requires to add, or an array of them.
Return value
An object where the key is the local identifier you requested in statements
,
and the value is the resulting local identifier used in the modified
code (which could be the existing local identifier already imported in the code or
the local identifier chosen to avoid name conflicts with an existing binding)