Git Hooks

git-hooks

# Git Hooks for Rails
# Runs automatically depending on what you're doing with git.
# Add to ./bin

# PRE-COMMIT HOOKS
# Automatically runs Codeclimate checks before a commit.
cat >".git/hooks/pre-push" <<EOL
  #!/bin/bash
  red='\033[0;31m'
  green='\033[0;32m'
  yellow='\033[0;33m'
  cyan='\033[1;36m'
  NC='\033[0m'
  
  printf "\${cyan}Checking for Docker..."
  docker ps 1> /dev/null 2>&1

  if [ \$? -ne 0 ]; then
    printf "\${red}Check that docker is running correctly\n"
    exit 1
   else
    printf "\${green}Docker running...\n"
  fi
  
  # Check if codeclimate image exists.  If not, pull it.
  printf "\${cyan}Checking for Codeclimate image..."
  if docker images -q codeclimate/codeclimate >/dev/null 2>&1; then
    printf "\${green}Codeclimate image exists.\n"
  else
    printf "\${red}Codeclimate image does not exist.  Refer to README on how to add Codeclimate.\n"
    exit 1
  fi
  
  # Check if .codeclimate.yml exists.
  if [ ! -f '.codeclimate.yml' ]; then
    printf "\${red} No .codeclimate.yml config file.\n"
    exit 1
  else
    printf "\${green}.codeclimate.yml found.\n"
  fi
  printf "\${cyan}If this is the first time it may take a while as it needs to pull dependent images.\n"

  # Analyze code with codeclimate and check for errors.
  docker run --tty --rm --env CODE_PATH="\$PWD" --volume "\$PWD":/code --volume "/tmp/cc:/tmp/cc" --volume /var/run/docker.sock:/var/run/docker.sock codeclimate/codeclimate analyze 2>&1 | tee -a >(sed -E "s/"$'\E'"\[([0-9]{1,2}(;[0-9]{1,2})*)?m//g" >codeclimate_logs)
  
  # Check how many errors there were.
  awk 'NF{p=\$0}END{print p}' codeclimate_logs | grep "Analysis complete! Found 0 issues."
  if [ \$? -ne 0 ]; then
    printf "\${red}Fix the issues and run the command again.  Errors can be viewed at ./codeclimate_logs.\${NC}\n"
    exit 1
  fi
  exit 0
EOL
# Change permissions for git hook pre-push file so it can be updated.
chmod +x '.git/hooks/pre-push'
echo -e "\033[0;32mGit pre-push hook at .git/hooks/pre-push updated.\033[0m"



# POST-MERGE HOOKS
# Runs every time a specified file changed when merging.

cat>".git/hooks/post-merge" <<EOL
  #!/bin/bash
  
  changed_files="\$(git diff-tree -r --name-only --no-commit-id ORIG_HEAD HEAD)"
  
  check_run() {
    echo "\$changed_files" | grep --quiet "\$1" && eval "\$2"
  }
  
  # ADD check_run [FILE_THAT_CHANGED] [COMMAND_TO_RUN] HERE
  
  # Checks if docker files changed and run 'docker-compose build' if it did.
  printf "Checking if docker-compose build required....\n"
  check_run docker-compose.yml "docker-compose build"
  check_run Dockerfile "docker-compose build"
  
  for filename in "docker/*/*"
  do
    check_run "\${filename}" "docker-compose build"
  done
  
  # Check if the git-hooks file changed and needs to be updated.
  check_run "bin/git-hooks" "bin/git-hooks"
EOL

# Change permissions for git hook post-merge file so it can be updated.
chmod +x '.git/hooks/post-merge'
echo -e "\033[0;32mGit post-merge hook at .git/hooks/post-merge updated.\033[0m"