#!/bin/bash

# Install client side hooks into all TDE local repositories

# Note: this is <tdehome>/scripts/code_format/git-hooks
SCRIPT_DIR=`dirname $(readlink -f "$0")`
TDE_DIR="${SCRIPT_DIR}/../../.."

if [[ ! -f "${TDE_DIR}/.gitmodules" ]]; then
  echo " --- Unable to find repository list (.gitmodules). Aborting."
  exit 1
fi

sed -n "s|^\[submodule \"\([^\"]*\)\"\]$|\1|p" <"${TDE_DIR}/.gitmodules" | \
grep "^main/" | \
while read MODULE; do
  cd "${TDE_DIR}/${MODULE}"
  GIT_COMMON_DIR=`git rev-parse --git-common-dir`
  if [[ "${GIT_COMMON_DIR}" == ".git" ]]; then
    # Normal repository
    HOOK_DIR="${TDE_DIR}/${MODULE}/${GIT_COMMON_DIR}/hooks"
  else
    # Worktree repository
    HOOK_DIR="${GIT_COMMON_DIR}/hooks"
  fi
  # Check hook folder exists
  if [ ! -d "${HOOK_DIR}" ]; then
    echo " --- Unable to find the hook folder for the repository ${MODULE}"
    echo "     Skipping module."
    continue
  fi
  # Check whether the pre-commit hook already exists. Warn users unless the
  # script was invoked with "-f" parameter.
  if [ -e "${HOOK_DIR}/pre-commit" -a "$1" != "-f" ]; then
    echo " --- Pre-commit hook already exists for the repository ${MODULE}"
    echo "     Rerun this script with '-f' to force hook overwriting."
    echo "     Skipping module."
    continue
  fi
  cp "${SCRIPT_DIR}/pre-commit" "${HOOK_DIR}/"
  chmod a+x "${HOOK_DIR}/pre-commit"
  if [ -e "${HOOK_DIR}/pre-commit" ]; then
    echo " Installed pre-commit hook for the repository ${MODULE}"
  else
    echo " --- Something went wrong when installing the pre-commit hook for the repository ${MODULE}"
  fi
done