.pre-commit

#!/bin/bash

# An example pre-commit file for nextSIM-DG development
#
# To use this pre-commit hook, you will need to install:
# * clang-format (see https://clang.llvm.org/docs/ClangFormat.html)
# * cmake-lint (see https://github.com/cheshirekow/cmake_format)
#
# Then copy this file as `.git/hooks/pre-commit` to set the pre-commit hook up.
#
# If changes are made by the pre-commit hook then the commit will abort and you
# will need to re-run the commit command.

BEFORE=$(mktemp)
git diff >${BEFORE}

for FILE in $(git diff --cached --name-only | grep -iE '\.(cpp|cc|h|hpp)$'); do
  # Apply clang-format for linting
  clang-format -i ${FILE} --verbose
  # Update date stamp to today's date
  LINE=$(grep '@date' ${FILE})
  let SPACES=$(echo "${LINE}" | tr -cd ' \t' | wc -c)-4
  NEWLINE=$(printf "%s%$((SPACES))s%s\n" " @date" " " "$(date '+%d %b %Y')")
  sed -i~ "s/${LINE}/${NEWLINE}/" ${FILE}
done

# Apply cmake-lint for linting
for FILE in $(git diff --cached --name-only | grep -i 'CMakeLists.txt'); do
  cmake-lint ${FILE} -c .cmake-lint-config.py
done

# Abort commit if formatting was applied
AFTER=$(mktemp)
git diff >${AFTER}
if [ "$(diff ${BEFORE} ${AFTER})" ]; then
  echo "Aborting git commit because the pre-commit hook made changes."
  rm ${BEFORE} ${AFTER}
  exit 1
fi