Git Hooks Tutorial.

Git Hooks Tutorial

My public talk about this project at Sberloga:
Git Hooks Is All You Need

1. Git Hooks 101

1. Init git repo:

mkdir git_repo
cd git_repo

git init

2. Git hooks are located in .git/hooks folder:

ls -lah .git/hooks

3. Create executable (chmod +x) pre-commit hooks (path: .git/hooks/pre-commit):

• bash hook with exit code 0
• bash hook with exit code 1
• python hook with exit code 0

Make commit after each step. You'll see different results.

2. Python pre-commit library

1. Create and activate virtual environment:

python3 -m venv venv
source venv/bin/activate

2. Install and activate pre-commit library:

pip install pre-commit
pre-commit install

3. Create pre-commit configuration file .pre-commit-config.yaml.
   Alternatively, you can use local configuration.

4. Create main.py file.
   Make commit. Pre-commit library will reformat file according to PEP8.
   Remove unused import sys string to get ready-to-commit main.py file.

3. Remote repo

1. Init empty "remote" repo:

git init --bare ../remote_repo.git

2. Link local and "remote" repo:

git remote add origin ../remote_repo.git

3. Create executable (chmod +x) pre-receive hook on "remote" (path: ../remote_repo.git/hooks/pre-receive).
   Make push and see the result.

Reference

Useful links:

• git hooks intro: link
• git hooks usage: link
• pre-commit page: link