git lfs auto track

lfs-auto-track.mjs

import fs from 'fs';
import path from 'path';
import { execSync } from 'child_process';

const cwd = process.cwd();
console.log(process.argv, cwd);

const files = process.argv.slice(3);

const conditions = process.argv[2];
const cs = conditions.split(';').map((item) => {
  const [ext, size] = item.split(':');
  return { exts: ext.split(','), size: +size.replace(/kb/gi, '') };
});

async function run() {
  let hasTrack = false;
  if (files && files.length > 0) {
    for (const filepath of files) {
      const ext = filepath.toLowerCase().split('.').pop();
      const extInfo = cs.find((item) =>
        item.exts.find((_ext) => _ext === ext || '.' + ext === _ext || _ext === '*')
      );
      if (extInfo) {
        const fileinfo = fs.statSync(filepath);
        const filesize = fileinfo.size / 1024;
        if (filesize >= extInfo.size) {
          const result = execSync(`git lfs track ${path.relative(cwd, filepath)}`).toString();
          if (result.indexOf('already supported') <= -1) {
            hasTrack = true;
          }
        }
      }
    }
  }

  if (hasTrack) {
    execSync(`git add .gitattributes`).toString();
  }
}

run();

package.json

{
  "name": "git-lfs-auto-track-demo",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "prepare": "is-ci || husky"
  },
  "dependencies": {
    "husky": "^9.0.7",
    "lint-staged": "^15.2.0",
    "prettier": "^3.2.4",
    "is-ci": "^3.0.1"
  },
  "prettier": {
    "printWidth": 100,
    "tabWidth": 2,
    "singleQuote": true,
    "trailingComma": "es5",
    "bracketSameLine": true
  },
  "lint-staged": {
    "*": [
      "node lfs-auto-track.mjs 'jpg,jpeg,png,gif:100kb;*:1024kb'"
    ],
    "*.{ts,tsx,mts}": [
      "prettier --write",
      "eslint --fix"
    ],
    "*.{md,css,js,mjs}": [
      "prettier --write"
    ]
  },
  "keywords": [],
  "author": "",
  "license": "ISC"
}