GoToSocial/web/source/lib/split-css.js

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/*
GoToSocial
Copyright (C) 2021-2022 GoToSocial Authors admin@gotosocial.org
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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 Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
"use strict";
const fs = require("fs");
const path = require("path");
const {Writable} = require("stream");
const {out} = require("../index.js");
const fromRegex = /\/\* from (.+?) \*\//;
module.exports = function splitCSS() {
let chunks = [];
return new Writable({
write: function(chunk, encoding, next) {
chunks.push(chunk);
next();
},
final: function() {
let stream = chunks.join("");
let input;
let content = [];
function write() {
if (content.length != 0) {
if (input == undefined) {
throw new Error("Got CSS content without filename, can't output: ", content);
} else {
console.log("writing to", out(input));
fs.writeFileSync(out(input), content.join("\n"));
}
content = [];
}
}
const cssDir = path.join(__dirname, "../css");
stream.split("\n").forEach((line) => {
if (line.startsWith("/* from")) {
let found = fromRegex.exec(line);
if (found != null) {
write();
let parts = path.parse(found[1]);
if (path.relative(cssDir, path.join(process.cwd(), parts.dir)) == "") {
input = parts.base;
} else {
// prefix filename with path
let relative = path.relative(path.join(__dirname, "../"), path.join(process.cwd(), found[1]));
input = relative.replace(/\//g, "-");
}
}
} else {
content.push(line);
}
});
write();
}
});
};