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/*******************************************************************************
uBlock Origin - a browser extension to block requests.
Copyright (C) 2022-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
*/
// jshint node:true, esversion:9
'use strict';
/******************************************************************************/
import fs from 'fs/promises';
import path from 'path';
import process from 'process';
/******************************************************************************/
const expandedParts = new Set();
/******************************************************************************/
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;
})();
/******************************************************************************/
function expandTemplate(wd, parts) {
const out = [];
const reInclude = /^%include +(.+):(.+)%\s+/gm;
const trim = text => trimSublist(text);
for ( const part of parts ) {
if ( typeof part !== 'string' ) {
out.push(part);
continue;
}
let lastIndex = 0;
for (;;) {
const match = reInclude.exec(part);
if ( match === null ) { break; }
out.push(part.slice(lastIndex, match.index).trim());
const repo = match[1].trim();
const fpath = `${match[2].trim()}`;
if ( expandedParts.has(fpath) === false ) {
console.info(` Inserting ${fpath}`);
out.push(
out.push({ file: `${fpath}` }),
`! *** ${repo}:${fpath} ***`,
fs.readFile(`${wd}/${fpath}`, { encoding: 'utf8' })
.then(text => fpath.includes('header') ? text : trim(text)),
);
expandedParts.add(fpath);
}
lastIndex = reInclude.lastIndex;
}
out.push(part.slice(lastIndex).trim());
}
return out;
}
/******************************************************************************/
function expandIncludeDirectives(wd, parts) {
const out = [];
const reInclude = /^!#include (.+)\s*/gm;
const trim = text => trimSublist(text);
let parentPath = '';
for ( const part of parts ) {
if ( typeof part !== 'string' ) {
if ( typeof part === 'object' && part.file !== undefined ) {
parentPath = part.file;
}
out.push(part);
continue;
}
let lastIndex = 0;
for (;;) {
const match = reInclude.exec(part);
if ( match === null ) { break; }
out.push(part.slice(lastIndex, match.index).trim());
const fpath = `${path.dirname(parentPath)}/${match[1].trim()}`;
if ( expandedParts.has(fpath) === false ) {
console.info(` Inserting ${fpath}`);
out.push(
{ file: fpath },
`! *** ${fpath} ***`,
fs.readFile(`${wd}/${fpath}`, { encoding: 'utf8' })
.then(text => fpath.includes('header') ? text : trim(text)),
);
expandedParts.add(fpath);
}
lastIndex = reInclude.lastIndex;
}
out.push(part.slice(lastIndex).trim());
}
return out;
}
/******************************************************************************/
function trimSublist(text) {
// Remove empty comment lines
text = text.replace(/^!\s*$(?:\r\n|\n)/gm, '');
// Remove sublist header information: the importing list will provide its
// own header.
text = text.trim().replace(/^(?:!\s+[^\r\n]+?(?:\r\n|\n))+/s, '');
return text;
}
/******************************************************************************/
function minify(text) {
// remove issue-related comments
text = text.replace(/^! https:\/\/.*?[\n\r]+/gm, '');
// remove empty lines
text = text.replace(/^[\n\r]+/gm, '');
// convert potentially present Windows-style newlines
text = text.replace(/\r\n/g, '\n');
return text;
}
/******************************************************************************/
function assemble(parts) {
const out = [];
for ( const part of parts ) {
if ( typeof part !== 'string' ) { continue; }
out.push(part);
}
return out.join('\n').trim() + '\n';
}
/******************************************************************************/
async function main() {
const workingDir = commandLineArgs.get('dir') || '.';
const inFile = commandLineArgs.get('in');
if ( typeof inFile !== 'string' || inFile === '' ) {
process.exit(1);
}
const outFile = commandLineArgs.get('out');
if ( typeof outFile !== 'string' || outFile === '' ) {
process.exit(1);
}
console.info(` Using template at ${inFile}`);
const inText = fs.readFile(`${workingDir}/${inFile}`, { encoding: 'utf8' });
let parts = [ inText ];
do {
parts = await Promise.all(parts);
parts = expandTemplate(workingDir, parts);
} while ( parts.some(v => v instanceof Promise) );
do {
parts = await Promise.all(parts);
parts = expandIncludeDirectives(workingDir, parts);
} while ( parts.some(v => v instanceof Promise));
let afterText = assemble(parts);
if ( commandLineArgs.get('minify') !== undefined ) {
afterText = minify(afterText);
}
console.info(` Creating ${outFile}`);
fs.writeFile(outFile, afterText);
}
main();
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