• author: bonfacem
• reviewed-by: jnduli

Git executes hooks before/after events such as: commit, push and receive. A pre-commit hook runs before a commit is finalized [0]. This post shows how to create a pre-commit hook for linting scheme files using `guix style`.

# Step 1: Create the hook
touch .git/hooks/pre-commit

# Step 2: Make the hook executable
chmod +x .git/hooks/pre-commit

# Step 3: Copy the following to .git/hooks/pre-commit

#!/bin/sh

# Run guix style on staged .scm files
for file in $(git diff --cached --name-only --diff-filter=ACM | grep ".scm$"); do
  if ! guix style --whole-file "$file"; then
    echo "Linting failed for $file. Please fix the errors and try again."
    exit 1
  fi
  git add $file
done