misuzu/assets/assproc.js

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const fs = require('fs');
const path = require('path');
const readline = require('readline');
const utils = require('./utils.js');
exports.process = async function(root, options) {
const macroPrefix = options.prefix || '#';
const entryPoint = options.entry || '';
root = fs.realpathSync(root);
const included = [];
const processFile = async function(fileName) {
const fullPath = path.join(root, fileName);
if(included.includes(fullPath))
return '';
included.push(fullPath);
if(!fullPath.startsWith(root)) {
console.error('INVALID PATH: ' + fullPath);
return '/* *** INVALID PATH: ' + fullPath + ' */';
}
if(!fs.existsSync(fullPath)) {
console.error('FILE NOT FOUND: ' + fullPath);
return '/* *** FILE NOT FOUND: ' + fullPath + ' */';
}
const lines = readline.createInterface({
input: fs.createReadStream(fullPath),
crlfDelay: Infinity,
});
let output = '';
let lastWasEmpty = false;
if(options.showPath)
output += "/* *** PATH: " + fullPath + " */\n";
for await(const line of lines) {
const lineTrimmed = utils.trim(line);
if(lineTrimmed === '')
continue;
if(line.startsWith(macroPrefix)) {
const args = lineTrimmed.split(' ');
const macro = utils.trim(utils.trimStart(args.shift(), macroPrefix));
switch(macro) {
case 'comment':
break;
case 'include': {
const includePath = utils.trimEnd(args.join(' '), ';');
output += utils.trim(await processFile(includePath));
output += "\n";
break;
}
default:
output += line;
output += "\n";
break;
}
} else {
output += line;
output += "\n";
}
}
return output;
};
return await processFile(entryPoint);
};
exports.housekeep = function(assetsPath) {
const files = fs.readdirSync(assetsPath).map(fileName => {
const stats = fs.statSync(path.join(assetsPath, fileName));
return {
name: fileName,
lastMod: stats.mtimeMs,
};
}).sort((a, b) => b.lastMod - a.lastMod).map(info => info.name);
const regex = /^(.+)-([a-f0-9]+)\.(.+)$/i;
const counts = {};
for(const fileName of files) {
const match = fileName.match(regex);
if(match) {
const name = match[1] + '-' + match[3];
counts[name] = (counts[name] || 0) + 1;
if(counts[name] > 5)
fs.unlinkSync(path.join(assetsPath, fileName));
} else console.log(`Encountered file name in assets folder with unexpected format: ${fileName}`);
}
};