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mirror of https://github.com/primer/css.git synced 2024-12-25 15:14:59 +03:00
css/script/remove-needless-disables
2019-09-25 14:57:53 -07:00

60 lines
1.8 KiB
JavaScript
Executable File

#!/usr/bin/env node
const stylelint = require('stylelint')
const {readFileSync, writeFileSync} = require('fs')
const files = process.argv.slice(2)
if (files.length === 0) {
files.push('src/**/*.scss')
}
// we use an empty "marker" to delineate removed lines
const REMOVED = `===REMOVED@${Date.now()}===`
stylelint.lint({files, reportNeedlessDisables: true}).then(({needlessDisables}) => {
for (const {source, ranges} of needlessDisables) {
const lines = readFileSync(source, 'utf8').split(/\n/)
let offset = 0
for (const {start, unusedRule} of ranges) {
let index = start - 1
let line = lines[index]
let disable = parseDisableComment(line)
if (!disable) {
console.warn(`unable to parse disable on line ${start}: ${lines[start - 1]}; trying previous line...`)
index--
line = lines[index]
disable = parseDisableComment(line)
if (!disable) {
console.warn(`unable to parse disable on line ${index + 1}: ${lines}`)
continue
}
}
const rules = new Set(disable.rules)
rules.delete(unusedRule)
if (rules.size === 0) {
console.log(`- ${line}`)
lines[index] = REMOVED
} else {
const replacement = line.replace(disable.content, `${disable.type} ${Array.from(rules).join(', ')}`)
lines[index] = replacement
console.log(`- ${line}`)
console.log(`+ ${replacement}`)
}
}
const output = lines.filter(line => line !== REMOVED).join('\n')
writeFileSync(source, output, 'utf8')
}
})
function parseDisableComment(str) {
const match = str.match(/(stylelint-disable((-next)?-line)?)\s+(.+)$/)
return match
? {
content: match[0],
type: match[1],
rules: match[4].split(/,\s+/)
}
: false
}