Example of pre-commit and pre-push files for a monorepo with lots of different modules (low-cost solution)

pre-commit

#!/bin/bash

FOLDERS_TO_INSPECT=("folder1" "folder2" "folder3")

STAGED_FILES="$(git diff --cached --name-only)"

function main {
	for folder_to_inspect in "${FOLDERS_TO_INSPECT[@]}" ; do
		echo $folder_to_inspect
		run_actions_if_needed $folder_to_inspect
	done
}

run_actions_if_needed() {
	if echo "$STAGED_FILES" | grep -q "$1"; then
		echo -e "\nThere are files staged under '$1'. Let's run their pre-commit actions!!\n"
		cd $1
		make pre-commit
		IS_PRE_COMMIT_SUCCESSFUL="$(echo $?)"
		cd -
    if [[ "$IS_PRE_COMMIT_SUCCESSFUL" != "0" ]]; then
      exit "$IS_PRE_COMMIT_SUCCESSFUL"
    fi
	else
		echo "No files staged under '$1'."
	fi
	echo -e "\n"
}

main

pre-push

#!/bin/bash

FOLDERS_TO_INSPECT=("folder1" "folder2" "folder3")

CHANGED_FILES_IN_COMMITS="$(git diff --name-only origin/main..HEAD)"

function main {
	for folder_to_inspect in "${FOLDERS_TO_INSPECT[@]}" ; do
		echo $folder_to_inspect
		run_actions_if_needed $folder_to_inspect
	done
}

run_actions_if_needed() {
	if echo "$CHANGED_FILES_IN_COMMITS" | grep -q "$1"; then
		echo "There are files committed under '$1'. Let's run the pre-push actions!!"
		cd $1
		make pre-push
		IS_PRE_PUSH_SUCCESSFUL="$(echo $?)"
		cd -
    if [[ "$IS_PRE_PUSH_SUCCESSFUL" != "0" ]]; then
      exit "$IS_PRE_PUSH_SUCCESSFUL"
    fi
	else
		echo "No files committed under '$1'."
	fi
	echo -e "\n"
}

main