element-web/scripts/reskindex.js
2021-01-19 17:58:17 +00:00

91 lines
2.9 KiB
JavaScript
Executable file

#!/usr/bin/env node
const fs = require('fs');
const path = require('path');
const glob = require('glob');
const util = require('util');
const args = require('minimist')(process.argv);
const chokidar = require('chokidar');
const componentIndex = path.join('src', 'component-index.js');
const componentIndexTmp = componentIndex+".tmp";
const componentsDir = path.join('src', 'components');
const componentJsGlob = '**/*.js';
const componentTsGlob = '**/*.tsx';
let prevFiles = [];
async function reskindex() {
const jsFiles = glob.sync(componentJsGlob, {cwd: componentsDir}).sort();
const tsFiles = glob.sync(componentTsGlob, {cwd: componentsDir}).sort();
const files = [...tsFiles, ...jsFiles];
if (!filesHaveChanged(files, prevFiles)) {
return;
}
prevFiles = files;
const header = args.h || args.header;
const strm = fs.createWriteStream(componentIndexTmp);
if (header) {
strm.write(fs.readFileSync(header));
strm.write('\n');
}
strm.write("/*\n");
strm.write(" * THIS FILE IS AUTO-GENERATED\n");
strm.write(" * You can edit it you like, but your changes will be overwritten,\n");
strm.write(" * so you'd just be trying to swim upstream like a salmon.\n");
strm.write(" * You are not a salmon.\n");
strm.write(" */\n\n");
strm.write("let components = {};\n");
for (let i = 0; i < files.length; ++i) {
const file = files[i].replace('.js', '').replace('.tsx', '');
const moduleName = (file.replace(/\//g, '.'));
const importName = moduleName.replace(/\./g, "$");
strm.write("import " + importName + " from './components/" + file + "';\n");
strm.write(importName + " && (components['"+moduleName+"'] = " + importName + ");");
strm.write('\n');
strm.uncork();
}
strm.write("export {components};\n");
// Ensure the file has been fully written to disk before proceeding
await util.promisify(strm.end);
fs.rename(componentIndexTmp, componentIndex, function(err) {
if (err) {
console.error("Error moving new index into place: " + err);
} else {
console.log('Reskindex: completed');
}
});
}
// Expects both arrays of file names to be sorted
function filesHaveChanged(files, prevFiles) {
if (files.length !== prevFiles.length) {
return true;
}
// Check for name changes
for (let i = 0; i < files.length; i++) {
if (prevFiles[i] !== files[i]) {
return true;
}
}
return false;
}
// -w indicates watch mode where any FS events will trigger reskindex
if (!args.w) {
reskindex();
return;
}
let watchDebouncer = null;
chokidar.watch(path.join(componentsDir, componentJsGlob)).on('all', (event, path) => {
if (path === componentIndex) return;
if (watchDebouncer) clearTimeout(watchDebouncer);
watchDebouncer = setTimeout(reskindex, 1000);
});