git.ts

import { execFileSync } from 'child_process';
import { CommitInfo } from './types';

export function getCommits(baseTag: string, currentTag: string, repoPath: string = process.cwd()): CommitInfo[] {
  const range = baseTag ? `${baseTag}..${currentTag}` : currentTag;

  try {
    const output = execFileSync(
      'git',
      ['log', range, '--first-parent', '--pretty=format:%H||%P||%an||%ae||%aI||%s'],
      { encoding: 'utf8', cwd: repoPath },
    );
    if (!output.trim()) return [];

    return output.trim().split('\n').map(line => {
      const [sha, parents, name, email, dateStr, message] = line.split('||');
      return {
        sha,
        parent_shas: parents ? parents.split(' ') : [],
        author: { git_name: name, git_email: email },
        date: new Date(dateStr),
        message,
      };
    });
  } catch (error) {
    console.error(`Error executing git log: ${error}`);
    throw error;
  }
}

export function getCommitHistory(ref: string, repoPath: string = process.cwd()): string[] {
  try {
    const output = execFileSync('git', ['log', ref, '--first-parent', '--pretty=format:%H'], { encoding: 'utf8', cwd: repoPath });
    return output.trim().split('\n').filter(line => line.length > 0);
  } catch (error) {
    console.error(`Error getting commit history for ${ref}: ${error}`);
    throw error;
  }
}

export function getInitialCommit(repoPath: string = process.cwd()): string {
  try {
    return execFileSync('git', ['rev-list', '--max-parents=0', 'HEAD'], { encoding: 'utf8', cwd: repoPath }).trim();
  } catch (error) {
    console.error(`Error getting initial commit: ${error}`);
    throw error;
  }
}