/* * Copyright (C) 2020-2021 Yomichan Authors * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <https://www.gnu.org/licenses/>. */ const fs = require('fs'); const path = require('path'); const assert = require('assert'); const {getAllFiles} = require('../util'); function escapeRegExp(string) { return string.replace(/[.*+\-?^${}()|[\]\\]/g, '\\$&'); } function countOccurences(string, pattern) { return (string.match(pattern) || []).length; } function getNewline(string) { const count1 = countOccurences(string, /(?:^|[^\r])\n/g); const count2 = countOccurences(string, /\r\n/g); const count3 = countOccurences(string, /\r(?:[^\n]|$)/g); if (count2 > count1) { return (count3 > count2) ? '\r' : '\r\n'; } else { return (count3 > count1) ? '\r' : '\n'; } } function getSubstringCount(string, substring) { let count = 0; const pattern = new RegExp(`\\b${escapeRegExp(substring)}\\b`, 'g'); while (true) { const match = pattern.exec(string); if (match === null) { break; } ++count; } return count; } function validateGlobals(fileName, fix) { const pattern = /\/\*\s*global\s+([\w\W]*?)\*\//g; const trimPattern = /^[\s,*]+|[\s,*]+$/g; const splitPattern = /[\s,*]+/; const source = fs.readFileSync(fileName, {encoding: 'utf8'}); let match; let first = true; let endIndex = 0; let newSource = ''; const allGlobals = []; const newline = getNewline(source); while ((match = pattern.exec(source)) !== null) { if (!first) { console.error(`Encountered more than one global declaration in ${fileName}`); return false; } first = false; const parts = match[1].replace(trimPattern, '').split(splitPattern); parts.sort(); const actual = match[0]; const expected = `/* global${parts.map((v) => `${newline} * ${v}`).join('')}${newline} */`; try { assert.strictEqual(actual, expected); } catch (e) { console.error(`Global declaration error encountered in ${fileName}:`); console.error(e.message); if (!fix) { return false; } } newSource += source.substring(0, match.index); newSource += expected; endIndex = match.index + match[0].length; allGlobals.push(...parts); } newSource += source.substring(endIndex); // This is an approximate check to see if a global variable is unused. // If the global appears in a comment, string, or similar, the check will pass. let errorCount = 0; for (const global of allGlobals) { if (getSubstringCount(newSource, global) <= 1) { console.error(`Global variable ${global} appears to be unused in ${fileName}`); ++errorCount; } } if (fix) { fs.writeFileSync(fileName, newSource, {encoding: 'utf8'}); } return errorCount === 0; } function main() { const fix = (process.argv.length >= 2 && process.argv[2] === '--fix'); const directory = path.resolve(__dirname, '..', '..', 'ext'); const pattern = /\.js$/; const ignorePattern = /[\\/]ext[\\/]mixed[\\/]lib[\\/]/; const fileNames = getAllFiles(directory, null, (f) => pattern.test(f) && !ignorePattern.test(f)); for (const fileName of fileNames) { if (!validateGlobals(fileName, fix)) { process.exit(-1); return; } } process.exit(0); } if (require.main === module) { main(); }