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commit-gen.js
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commit-gen.js
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#!/usr/bin/env node
const { execSync } = require('child_process');
const fs = require('fs');
const path = require('path');
const { OpenAI } = require('openai');
const yargs = require('yargs/yargs');
const { hideBin } = require('yargs/helpers');
// Initialize OpenAI client
const openai = new OpenAI({
apiKey: process.env.OPENAI_API_KEY,
});
// Parse command line arguments
const argv = yargs(hideBin(process.argv))
.option('path', {
alias: 'p',
type: 'string',
description: 'Path to the file or directory',
demandOption: true,
})
.option('staged', {
alias: 's',
type: 'boolean',
description:
'Use staged changes instead of comparing against the base branch',
default: false,
})
.help()
.alias('help', 'h').argv;
// Function to find the nearest package.json and get the package name
function getPackageName(filePath) {
let dir = filePath;
while (true) {
const packageJsonPath = path.join(dir, 'package.json');
if (fs.existsSync(packageJsonPath)) {
const packageJson = JSON.parse(fs.readFileSync(packageJsonPath, 'utf8'));
if (packageJson.name) {
return packageJson.name;
} else {
console.error(`Package name not found in ${packageJsonPath}`);
process.exit(1);
}
}
const parentDir = path.dirname(dir);
if (parentDir === dir) {
console.error('Reached root directory without finding package.json');
process.exit(1);
}
dir = parentDir;
}
}
function sanitizeInput(input) {
return input.replace(/[^a-zA-Z0-9_\-\/\.]/g, '');
}
function getAllowedScopes() {
const packagesDir = path.resolve(__dirname, 'packages');
const scopes = [];
fs.readdirSync(packagesDir).forEach((dir) => {
const projectJsonPath = path.join(packagesDir, dir, 'project.json');
if (fs.existsSync(projectJsonPath)) {
const projectJson = JSON.parse(fs.readFileSync(projectJsonPath, 'utf8'));
if (projectJson.name) {
scopes.push(projectJson.name);
}
}
});
return scopes;
}
async function generateCommitMessage(patch, packageName) {
const allowedScopes = getAllowedScopes().join(', ');
const prompt = `Generate a conventional commit message for the following git patch.
RULES:
Never author BREAKING CHANGE messages, they are not allowed.
Body's lines must not be longer than 100 characters [body-max-line-length]
Provide no explanation
Focus on a statement of work of the changes:
${patch}
Allowed scopes: ${allowedScopes}
Please format the commit message as follows:
<type>(<scope>): <subject>
<body>
<footer>`;
const response = await openai.chat.completions.create({
model: 'gpt-4o',
messages: [
{ role: 'system', content: 'never author BREAKING CHANGE commits' },
{ role: 'user', content: prompt },
],
max_tokens: 200,
});
return response.choices[0].message.content
.trim()
.replace('```markdown', '')
.replace('```', '')
.replace(/^```(?:\w+)?|```$/g, '')
.trim()
.replace(/^\`/, '')
.replace(/\`$/, '')
.trim();
}
function getGitDiffPatch(filePath, useStaged) {
try {
const sanitizedFilePath = sanitizeInput(filePath);
let patch;
if (useStaged) {
patch = execSync(`git diff --cached -- "${sanitizedFilePath}"`, {
shell: '/bin/bash',
}).toString();
} else {
const baseBranch = execSync(
'git symbolic-ref refs/remotes/origin/HEAD | sed "s@^refs/remotes/origin/@@g" || echo main',
{ shell: '/bin/bash' },
)
.toString()
.trim();
patch = execSync(`git diff ${baseBranch} -- "${sanitizedFilePath}"`, {
shell: '/bin/bash',
}).toString();
}
return patch;
} catch (error) {
console.error('Error getting git diff:', error.message);
process.exit(1);
}
}
// Function to generate a random filename
function generateRandomFilename() {
const adjectives = [
'quick',
'lazy',
'sleepy',
'noisy',
'hungry',
'brave',
'calm',
'eager',
'gentle',
'happy',
];
const animals = [
'fox',
'dog',
'cat',
'mouse',
'owl',
'tiger',
'lion',
'bear',
'wolf',
'eagle',
];
const adjective = adjectives[Math.floor(Math.random() * adjectives.length)];
const animal = animals[Math.floor(Math.random() * animals.length)];
return `ai-${adjective}-${animal}.md`;
}
async function main() {
const filePath = path.resolve(argv.path);
if (!fs.existsSync(filePath)) {
console.error(`File or directory not found: ${filePath}`);
process.exit(1);
}
const packageName = getPackageName(filePath);
const patch = getGitDiffPatch(filePath, argv.staged);
if (!patch) {
console.log('No changes detected.');
process.exit(0);
}
try {
const commitMessage = await generateCommitMessage(patch, packageName);
console.log('Generated Commit Message:');
console.log(commitMessage);
} catch (error) {
console.error('Error generating commit message:', error.message);
process.exit(1);
}
}
main();