This code defines a function that renames files within a Git repository by first identifying files to rename using a pattern and then executing Git commands to perform the renaming. It utilizes a third-party renamer module to help with the file identification and renaming process.

Run example

npm run import -- "Rename a bunch of files using Git and renamer"

Rename a bunch of files using Git and renamer

var renamer = require('renamer');

function renameUsingGit(gitRoot, match, find, replace) {
    var files = renamer.expand(path.join(gitRoot, match));
    var results = renamer.replace({
        files: files.filesAndDirs,
        find: find,
        replace: replace
    });
    return renamer.dryRun(results).list.map(r => {
        // rename with git instead
        var output = execSync('git '
            + '--work-tree=' + JSON.stringify(gitRoot)
            + ' --git-dir=' + JSON.stringify(path.join(gitRoot, '.git'))
            + ' mv ' + JSON.stringify(r.before)
            + ' ' + JSON.stringify(r.after));
        return output.toString() || r.after;
    });
};
renameUsingGit;

const path = require('path');
const { execSync } = require('child_process');
const Renamer = require('renamer');

/**
 * Renames files in a Git repository.
 * 
 * @param {string} gitRoot - The root of the Git repository.
 * @param {string} match - The pattern to match files.
 * @param {string} find - The pattern to find in files.
 * @param {string} replace - The pattern to replace with.
 * @returns {Promise} Promised array of renamed files.
 */
async function renameUsingGit(gitRoot, match, find, replace) {
  // Check if Git root is a valid directory
  if (!fs.existsSync(gitRoot)) {
    throw new Error('Invalid Git root directory');
  }

  // Expand the files to be renamed
  const files = new Renamer().expand(path.join(gitRoot, match)).filesAndDirs;

  // Check if files or directories exist
  if (!files.length) {
    throw new Error('No files or directories found');
  }

  // Replace the pattern in files
  const results = new Renamer().replace({
    files,
    find,
    replace,
  });

  // Dry run the results to see the file names before renaming them
  const dryRunResults = new Renamer().dryRun(results);

  // List of renamed files
  const renamedFiles = [];

  // Rename each file using Git
  dryRunResults.list.forEach((file) => {
    // Use execSync to execute the Git command
    const output = execSync('git '
      + `--work-tree=${gitRoot}`
      + ` --git-dir=${path.join(gitRoot, '.git')}`
      + ` mv ${file.before} ${file.after}`);

    // Get the output as a string
    const outputStr = output.toString();

    // Add the renamed file to the list
    renamedFiles.push(outputStr || file.after);
  });

  // Return the list of renamed files
  return renamedFiles;
}

// Export the function
module.exports = renameUsingGit;

This code defines a function renameUsingGit that renames files within a Git repository using Git commands. Here's a breakdown:

1. var renamer = require('renamer');: This line imports a module named renamer, which likely provides utilities for finding and renaming files.

2. function renameUsingGit(gitRoot, match, find, replace): This defines the function renameUsingGit, which takes four arguments:

   • gitRoot: The path to the root directory of the Git repository.
   • match: A pattern to match files to be renamed (e.g., *.js).
   • find: The string to search for in file names.
   • replace: The string to replace find with.

3. var files = renamer.expand(path.join(gitRoot, match));: This line uses the renamer module to find all files matching the match pattern within the gitRoot directory.

4. var results = renamer.replace({ files: files.filesAndDirs, find: find, replace: replace });: This line uses the renamer module to generate a list of renaming operations based on the find and replace patterns.

5. return renamer.dryRun(results).list.map(r => { ... });: This line simulates the renaming operations using renamer.dryRun and then maps over the results to execute the renaming using Git commands.

6. execSync('git ...'): This line executes a Git command to rename the files. It constructs the command using the gitRoot, .git directory, and the r.before and r.after file paths from the renaming results.

7. renameUsingGit;: This line appears to be a typo and doesn't have any effect.

Let me know if you have any other code snippets you'd like me to explain!