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#!/usr/bin/env node
/*!
* Script to find unused Sass variables.
* Copyright 2017-2018 The Bootstrap Authors
* Copyright 2017-2018 Twitter, Inc.
* Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
*/
'use strict'
const fs = require('fs')
const path = require('path')
const glob = require('glob')
// Blame TC39... https://github.com/benjamingr/RegExp.escape/issues/37
function regExpQuote(str) {
return str.replace(/[-\\^$*+?.()|[\]{}]/g, '\\$&')
}
let globalSuccess = true
function findUnusedVars(dir) {
if (!(fs.existsSync(dir) && fs.statSync(dir).isDirectory())) {
console.log(`"${dir}": Not a valid directory!`)
process.exit(1)
}
console.log(`Finding unused variables in "${dir}"...`)
// A variable to handle success/failure message in this function
let unusedVarsFound = false
// Array of all Sass files' content
const sassFiles = glob.sync(path.join(dir, '**/*.scss'))
// String of all Sass files' content
let sassFilesString = ''
sassFiles.forEach((file) => {
sassFilesString += fs.readFileSync(file, 'utf8')
})
// Array of all Sass variables
const variables = sassFilesString.match(/(^\$[a-zA-Z0-9_-]+[^:])/gm)
console.log(`Found ${variables.length} total variables.`)
// Loop through each variable
variables.forEach((variable) => {
const re = new RegExp(regExpQuote(variable), 'g')
const count = (sassFilesString.match(re) || []).length
if (count === 1) {
console.log(`Variable "${variable}" is not being used.`)
unusedVarsFound = true
globalSuccess = false
}
})
if (unusedVarsFound === false) {
console.log(`No unused variables found in "${dir}".`)
}
}
function main(args) {
if (args.length < 1) {
console.log('Wrong arguments!')
console.log('Usage: lint-vars.js folder [, folder2...]')
process.exit(1)
}
args.forEach((arg) => {
findUnusedVars(arg)
})
if (globalSuccess === false) {
process.exit(1)
}
}
// The first and second args are: path/to/node script.js
main(process.argv.slice(2))
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