Check Java format against google-java-format and prevent git commit if found violations

pre-commit

#!/usr/bin/env bash

google_java_format=$HOME/.local/lib/google-java-format-1.5-all-deps.jar
[ -f "$google_java_format" ] || exit 1

git diff --name-only --cached| {
    code=0
    while IFS= read -r file; do
        [ -f "$file" ] || continue
        case "$file" in
            *.java)
                if ! java -jar "$google_java_format" --set-exit-if-changed --fix-imports-only "$file" >/dev/null 2>&1; then
                    echo $file >&2
                    code=1
                fi
                ;;
        esac
    done
    exit $code
}