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Replace lint-vars.sh with a Node.js script. (#24860)
Also, include it in the `css` npm script since it's instant.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| #!/usr/bin/env node | ||
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| /*! | ||
| * Script to find unused Sass variables. | ||
| * | ||
| * Copyright 2017 The Bootstrap Authors | ||
| * Copyright 2017 Twitter, Inc. | ||
| * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE) | ||
| */ | ||
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| 'use strict' | ||
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| const fs = require('fs') | ||
| const path = require('path') | ||
| const glob = require('glob') | ||
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| // Blame TC39... https://github.com/benjamingr/RegExp.escape/issues/37 | ||
| function regExpQuote(str) { | ||
| return str.replace(/[-\\^$*+?.()|[\]{}]/g, '\\$&') | ||
| } | ||
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| let globalSuccess = true | ||
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| function findUnusedVars(dir) { | ||
| if (!(fs.existsSync(dir) && fs.statSync(dir).isDirectory())) { | ||
| console.log(`"${dir}": Not a valid directory!`) | ||
| process.exit(1) | ||
| } | ||
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| console.log(`Finding unused variables in "${dir}"...`) | ||
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| // A variable to handle success/failure message in this function | ||
| let unusedVarsFound = false | ||
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| // Array of all Sass files' content | ||
| const sassFiles = glob.sync(path.join(dir, '**/*.scss')) | ||
| // String of all Sass files' content | ||
| let sassFilesString = '' | ||
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| sassFiles.forEach((file) => { | ||
| sassFilesString += fs.readFileSync(file, 'utf8') | ||
| }) | ||
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| // Array of all Sass variables | ||
| const variables = sassFilesString.match(/(^\$[a-zA-Z0-9_-]+[^:])/gm) | ||
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| console.log(`There's a total of ${variables.length} variables.`) | ||
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| // Loop through each variable | ||
| variables.forEach((variable) => { | ||
| const re = new RegExp(regExpQuote(variable), 'g') | ||
| const count = (sassFilesString.match(re) || []).length | ||
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| if (count === 1) { | ||
| console.log(`Variable "${variable}" is only used once!`) | ||
| unusedVarsFound = true | ||
| globalSuccess = false | ||
| } | ||
| }) | ||
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| if (unusedVarsFound === false) { | ||
| console.log(`No unused variables found in "${dir}".`) | ||
| } | ||
| } | ||
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| function main(args) { | ||
| if (args.length < 1) { | ||
| console.log('Wrong arguments!') | ||
| console.log('Usage: lint-vars.js folder [, folder2...]') | ||
| process.exit(1) | ||
| } | ||
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| args.forEach((arg) => { | ||
| findUnusedVars(arg) | ||
| }) | ||
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| if (globalSuccess === false) { | ||
| process.exit(1) | ||
| } | ||
| } | ||
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| // The first and second args are: path/to/node script.js | ||
| main(process.argv.slice(2)) |
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