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/*
* 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');
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 = /^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(); }
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