deedpoll

Large JavaScript projects often have naming conventions. Usually, the onus is
on project maintainers to spot incorrectly named identifiers when reviewing
pull requests. deedpoll is a simple tool for enforcing consistent naming of
common identifiers such as those used as loop variables.

Consider the following file:

``console
$ cat example.js
function findIndex(array, el) {
for (var i = 0, len = array.length; i < len; i += 1) {
if (array[i] === el) {
return i;
}
}
return -1;
}
`

Usage is straightforward. Include any number of --rename :
directives and any number of filenames (optionally separated by --):

`console
$ deedpoll --rename array:list --rename i:idx --rename index:idx -- example.js
Expected "list" at example.js:1:19 (found "array")
Expected "idx" at example.js:2:11 (found "i")
`

The exit code indicates the number of incorrectly named identifiers:

`console
$ echo $?
2
``