48 lines
1.4 KiB
JavaScript
48 lines
1.4 KiB
JavaScript
import fs from 'node:fs/promises';
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import path from 'node:path';
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import sharp from 'sharp';
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const dirIn = 'tools/in';
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const dirOut = 'tools/out';
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const thresholdBytes = 400 * 1024;
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const quality = [100, 99, 97, 95, 90, 80, 75, 70, 60, 50, 40];
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async function makedir(dir) {
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try {
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await fs.stat(dir);
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} catch (err) {
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if (err.code !== 'ENOENT') throw err;
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await fs.mkdir(dir);
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}
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}
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async function main() {
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await makedir(dirIn);
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await makedir(dirOut);
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for (const base of await fs.readdir(dirIn)) {
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if (base === '.gitkeep') continue;
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const fileIn = `${dirIn}/${base}`;
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const { name } = path.parse(fileIn);
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const { size } = await fs.stat(fileIn);
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if (size <= thresholdBytes) {
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const fileOut = `${dirOut}/${base}`;
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console.log(`${fileIn} -> ${fileOut} (no changes)`);
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fs.copyFile(fileIn, fileOut);
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continue;
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}
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const fileOut = `${dirOut}/${name}.jpg`;
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for (let i = 0; i < quality.length; i += 1) {
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const newStats = await (sharp(fileIn)
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.withMetadata()
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.jpeg({ mozjpeg: true, quality: quality[i] })
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.toFile(fileOut)
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);
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if (i == quality.length || newStats.size <= thresholdBytes) {
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console.log(`${fileIn} -> ${fileOut} (quality: ${quality[i]})`);
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break;
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}
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}
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}
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}
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main();
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