thanosjs.js

#!/usr/bin/env node
const gaf = require("get-all-files");
const path = require("path");
const fs = require("fs");
const fileHash = require("md5-file");
const dir = process.cwd();
(async function () {
    if (process.argv.includes("restore-last-snap")) {
        const backup = require("./backup-manifest.json");
        let keys = Object.keys(backup);
        for (let i = 0; i < keys.length; i++) {
            const target = keys[i];
            const location = backup[target];
            fs.copyFileSync(location, target);
            console.log("restoring '" + location + "' to '" + target + "'");
        }
        return;
    }
    let files = await gaf(dir, "**/*.*");
    const fileMeta = {};
    let total = 0;
    for (let i = 0; i < files.length; i++) {
        const current = files[i];
        fileMeta[current] = (await fs.promises.stat(current));
        total += fileMeta[current].size;
        if (process.argv.includes("what-you-do")) console.log("got size for file '" + current + "', size is " + fileMeta[current].size + " out of total size " + total + "bytes");
    }
    console.log("got total size of " + total + " bytes in " + files.length + " files");
    const files_to_delete = [];
    files = files.sort(() => { return Math.random() < 0.5; });
    for (let i = 0; i < files.length / 2; i++) {
        files_to_delete.push(files[i]);
    }
    if (process.argv.includes("snap-fingers")) {
        fs.writeFileSync(path.resolve(__dirname, "./backup-manifest.json"), "{}");
        if (!fs.existsSync(path.resolve(__dirname, "./backup"))) {
            fs.mkdirSync(path.resolve(__dirname, "./backup"));
        }
        const backup = {};
        for (let i = 0; i < files_to_delete.length; i++) {
            const hash = fileHash.sync(files_to_delete[i]);
            fs.copyFileSync(files_to_delete[i], path.resolve(__dirname, "./backup", "./" + hash + ".backup"));
            backup[files_to_delete[i]] = path.resolve(__dirname, "./backup", "./" + hash + ".backup");
        }
        console.log("had I snapped my fingers the following files would have been deleted:");
        let removed_size = 0;
        files_to_delete.forEach((_, i) => {
            console.log("removing: '" + _ + "'");
            removed_size += fileMeta[_].size;
            fs.unlinkSync(_);
        });
        console.log("removed " + (removed_size) + " bytes from your project making it " + (1 - ((total - removed_size) / total)).toPrecision(4) * 100 + "% smaller.");
        fs.writeFileSync(path.resolve(__dirname, "./backup-manifest.json"), JSON.stringify(backup, null, 2));
    } else {
        console.log("had I snapped my fingers the following files would have been deleted:");
        let removed_size = 0;
        files_to_delete.forEach((_, i) => {
            console.log(i + ". " + _);
            removed_size += fileMeta[_].size;
        });
        console.log("removing these files would reduce your project size to " + (total - removed_size) + " bytes making it " + (1 - ((total - removed_size) / total)).toPrecision(4) * 100 + "% its previous size.");
    }
})();