#!/usr/bin/env bash
set -eu

# #############################################################################
# This is a pre-commit hook that allows you to respect the code formatting
# chosen by the Navit team.
#
# To install it, create a folder named "hooks" in the .git directory of this
# project and just symlink this script inside it. Or run the following script
# from the root directory of the project:
#  mkdir .git/hooks
#  ln -s ${PWD}/scripts/pre-commit ${PWD}/.git/hooks/
#
# This will not work on Windows platform unless you are using cygwin.
# #############################################################################

files=$(git diff --cached --name-only --diff-filter=ACM)
git_dir=$(git rev-parse --show-toplevel)

# check for common misspells if misspell is installed
[[ -n "$(which misspell)" ]] && misspell
if [[ -z "$(which astyle)" ]]; then
  echo "Unable to find the astyle executable. Please install it to have automatic formatting of your files."
fi

# Only work on the files that are part of the commit
for f in $files; do
  if [[ -e "${git_dir}/${f}" ]]; then
    if [[ "${f: -4}" != ".bat" ]]; then
      # Makes sure to not commit ^M
      [[ -n "$(which dos2unix)" ]] && dos2unix -s -S -q "${git_dir}/${f}"
      # Removes trailing spaces
      [[ "$(file -bi """${git_dir}/${f}""")" =~ ^text ]] && sed 's/\s*$//' -i "${git_dir}/${f}"
      git add "${git_dir}/${f}"
    fi
    # Formats any *.c and *.cpp files
    if [[ "${f: -2}" == ".c" ]] || [[ "${f: -4}" == ".cpp" ]]; then
      if [[ -n "$(which astyle)" ]]; then
        astyle --indent=spaces=4 --style=attach -n --max-code-length=120 -xf -xh "${git_dir}/${f}"
        git add "${git_dir}/${f}"
      fi
    fi
  fi
done