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/*******************************************************************************
uBlock Origin - a comprehensive, efficient content blocker
Copyright (C) 2024-present Raymond Hill
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 {http://www.gnu.org/licenses/}.
Home: https://github.com/gorhill/uBlock
*/
'use strict';
/******************************************************************************/
import fs from 'fs/promises';
import process from 'process';
/******************************************************************************/
const commandLineArgs = (( ) => {
const args = new Map();
let name, value;
for ( const arg of process.argv.slice(2) ) {
const pos = arg.indexOf('=');
if ( pos === -1 ) {
name = arg;
value = '';
} else {
name = arg.slice(0, pos);
value = arg.slice(pos+1);
}
args.set(name, value);
}
return args;
})();
const beforeDir = commandLineArgs.get('before') || '';
const afterDir = commandLineArgs.get('after') || '';
if ( beforeDir === '' || afterDir === '' ) {
process.exit(0);
}
/******************************************************************************/
async function main() {
const folders = [
'main',
'modify-headers',
'redirect',
'regex',
'removeparam',
];
const writePromises = [];
for ( const folder of folders ) {
const afterFiles = await fs.readdir(`${afterDir}/rulesets/${folder}`);
for ( const file of afterFiles ) {
let raw = await fs.readFile(`${beforeDir}/rulesets/${folder}/${file}`, 'utf-8').catch(( ) => '');
let beforeRules;
try { beforeRules = JSON.parse(raw); } catch(_) { }
if ( Array.isArray(beforeRules) === false ) { continue; }
raw = await fs.readFile(`${afterDir}/rulesets/${folder}/${file}`, 'utf-8').catch(( ) => '');
let afterRules;
try { afterRules = JSON.parse(raw); } catch(_) { }
if ( Array.isArray(afterRules) === false ) { continue; }
const beforeMap = new Map(beforeRules.map(a => {
const id = a.id;
a.id = 0;
return [ JSON.stringify(a), id ];
}));
const reusedIds = new Set();
for ( const afterRule of afterRules ) {
afterRule.id = 0;
const key = JSON.stringify(afterRule);
const beforeId = beforeMap.get(key);
if ( beforeId === undefined ) { continue; }
if ( reusedIds.has(beforeId) ) { continue; }
afterRule.id = beforeId;
reusedIds.add(beforeId);
}
// Assign new ids to unmatched rules
let ruleIdGenerator = 1;
for ( const afterRule of afterRules ) {
if ( afterRule.id !== 0 ) { continue; }
while ( reusedIds.has(ruleIdGenerator) ) { ruleIdGenerator += 1; }
afterRule.id = ruleIdGenerator++;
}
afterRules.sort((a, b) => a.id - b.id);
const indent = afterRules.length > 10 ? undefined : 1;
const lines = [];
for ( const afterRule of afterRules ) {
lines.push(JSON.stringify(afterRule, null, indent));
}
const path = `${afterDir}/rulesets/${folder}/${file}`;
console.log(` Salvaged ${reusedIds.size} ids in ${folder}/${file}`);
writePromises.push(
fs.writeFile(path, `[\n${lines.join(',\n')}\n]\n`)
);
}
}
await Promise.all(writePromises);
}
main();
/******************************************************************************/
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