/**
* Install git post-commit hook for recording commits
*/
import { existsSync, readFileSync, writeFileSync, chmodSync, mkdirSync } from 'fs';
import { join, resolve } from 'path';
import type { LinkCommandResult } from '../types.js';
const HOOK_MARKER = '# cursor-chat-history-linker';
const HOOK_SNIPPET = `
${HOOK_MARKER}
# Record commit for Cursor Chat History Linker
(npx --yes cursor-chat-history-mcp-link commit --repo "$PWD" &) 2>/dev/null
${HOOK_MARKER}-end
`;
export async function installGitHook(options: {
repoPath?: string;
}): Promise<LinkCommandResult> {
try {
const repoPath = resolve(options.repoPath ?? process.cwd());
const gitDir = join(repoPath, '.git');
const hooksDir = join(gitDir, 'hooks');
const postCommitPath = join(hooksDir, 'post-commit');
// Verify this is a git repository
if (!existsSync(gitDir)) {
return {
success: false,
message: `Not a git repository: ${repoPath}`,
};
}
// Ensure hooks directory exists
if (!existsSync(hooksDir)) {
mkdirSync(hooksDir, { recursive: true });
}
// Read existing post-commit hook if it exists
let existingContent = '';
let needsShebang = true;
if (existsSync(postCommitPath)) {
existingContent = readFileSync(postCommitPath, 'utf-8');
// Check if our hook is already installed
if (existingContent.includes(HOOK_MARKER)) {
return {
success: true,
message: `Git hook already installed in: ${postCommitPath}`,
data: { postCommitPath, alreadyInstalled: true },
};
}
// Check if it already has a shebang
if (existingContent.startsWith('#!')) {
needsShebang = false;
}
}
// Build the new hook content
let newContent = existingContent;
if (needsShebang) {
newContent = '#!/bin/bash\n' + newContent;
}
// Append our hook snippet
newContent = newContent.trimEnd() + '\n' + HOOK_SNIPPET;
// Write the updated hook
writeFileSync(postCommitPath, newContent, 'utf-8');
chmodSync(postCommitPath, '755');
return {
success: true,
message: `Git post-commit hook installed in: ${postCommitPath}
The hook will automatically record commits and link them to recent Cursor conversations.
Note: The hook runs asynchronously to avoid slowing down commits.`,
data: {
postCommitPath,
repoPath,
},
};
} catch (error) {
return {
success: false,
message: `Failed to install git hook: ${error instanceof Error ? error.message : String(error)}`,
};
}
}
