gofmt git pre-commit hook

pre-commit

#!/bin/bash
if git rev-parse HEAD >/dev/null 2>&1; then
        FILES=$(git diff --staged --name-only | grep -e '\.go$')
else
        FILES=$(git ls-files -c | grep -e '\.go$')
fi

for file in $FILES; do
        if test -n "$(gofmt -l $file)"; then
                echo "Error: git pre-commit failed, file needs gofmt: $file"
                exit 1
        fi
done

Save as .git/hooks/pre-commit and chmod +x