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-rw-r--r--dev/lint/global-declarations.js157
1 files changed, 157 insertions, 0 deletions
diff --git a/dev/lint/global-declarations.js b/dev/lint/global-declarations.js
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+/*
+ * Copyright (C) 2023 Yomitan Authors
+ * Copyright (C) 2020-2022 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');
+
+
+/**
+ * @param {string} string
+ * @returns {string}
+ */
+function escapeRegExp(string) {
+ return string.replace(/[.*+\-?^${}()|[\]\\]/g, '\\$&');
+}
+
+/**
+ * @param {string} string
+ * @param {RegExp} pattern
+ * @returns {number}
+ */
+function countOccurences(string, pattern) {
+ return (string.match(pattern) || []).length;
+}
+
+/**
+ * @param {string} string
+ * @returns {'\r'|'\n'|'\r\n'}
+ */
+function getNewline(string) {
+ const count1 = countOccurences(string, /(?:^|[^\r])\n/g);
+ const count2 = countOccurences(string, /\r\n/g);
+ const count3 = countOccurences(string, /\r(?:[^\n]|$)/g);
+ if (count2 > count1) {
+ return (count3 > count2) ? '\r' : '\r\n';
+ } else {
+ return (count3 > count1) ? '\r' : '\n';
+ }
+}
+
+/**
+ * @param {string} string
+ * @param {string} substring
+ * @returns {number}
+ */
+function getSubstringCount(string, substring) {
+ let count = 0;
+ const pattern = new RegExp(`\\b${escapeRegExp(substring)}\\b`, 'g');
+ while (true) {
+ const match = pattern.exec(string);
+ if (match === null) { break; }
+ ++count;
+ }
+ return count;
+}
+
+
+/**
+ * @param {string} fileName
+ * @param {boolean} fix
+ * @returns {boolean}
+ */
+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 ${fileName}:`);
+ console.error(e instanceof Error ? e.message : `${e}`);
+ 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 = /^lib[\\/]/;
+ const fileNames = getAllFiles(directory, (f) => pattern.test(f) && !ignorePattern.test(f));
+ for (const fileName of fileNames) {
+ if (!validateGlobals(path.join(directory, fileName), fix)) {
+ process.exit(-1);
+ return;
+ }
+ }
+ process.exit(0);
+}
+
+
+if (require.main === module) { main(); }