test

#!/bin/bash
# macos-scripts/test

# test
#   Find shell scripts and run shellcheck on them
#   Adapted from jessfraz/dotfiles/bin/test.sh
#   https://github.com/jessfraz/dotfiles/blob/master/test.sh

set -euo pipefail
# -e exit if any command returns non-zero status code
# -u prevent using undefined variables
# -o pipefail force pipelines to fail on first non-zero status code

/usr/bin/tput sgr0; 
# reset colors


function check_shellcheck {
  # check_shellcheck
  #   Check if shellcheck is installed

  if ! [ -x "$(command -v shellcheck)" ]; then
    echo "[FAIL] shellcheck not installed"
    echo "[INFO] macOS: brew install shellcheck"
    echo "[INFO] Linux: apt install shellcheck"
    exit 1
  fi
}


function find_files {
  # find_files
  #   Find all regular files in source directory
  
  while IFS=$'\n' read -r file; do 
    FILES+=("${file}"); 
  done < <(/usr/bin/find . -maxdepth 1 -type f \
            -not -iwholename '*.git*'   \
            -not -iwholename '*.tar.xz' \
            | /usr/bin/sort -u)
}


function analyse_shell_scripts { 
  # analyse_shell_scripts
  #   Iterate over $FILES to find bash and zsh scripts
  #   Call shellcheck on them via analyse function
  
  for file in "${FILES[@]}"; do
    if /usr/bin/file "${file}" | /usr/bin/grep --quiet "shell" || \
       /usr/bin/file "${file}" | /usr/bin/grep --quiet "bash" ; then
      # Find bash scripts
      # Running file on a script with the shebang "#!/usr/bin/env bash" returns
      #   "a /usr/bin/env bash script, ASCII text executable"
      # Versus a script with the shebang "#!/bin/bash" which returns
      #   "Bourne-Again shell script, ASCII text executable"
      analyse "${file}" 

    elif /usr/bin/file "${file}" | /usr/bin/grep --quiet "zsh"; then
      # Find zsh scripts
      # Running file on a script with shebang "#!/usr/bin/env zsh" returns
      #   "a /usr/bin/env zsh script text executable"
      analyse "${file}"
    fi
  done
}


function analyse {
  # analyse
  #   Wrapper for shellcheck to handle errors
  #   Always invokes shellcheck in bash mode
  #     as shellcheck does not support zsh

  local shell_file=${1:?shell_file not passed to lint_shell_file}

  if shellcheck --shell=bash "${shell_file}" ; then
      # Run shellcheck on the file
      # Always uses bash mode as bittersweet now has a zsh shebang
      # Shelllcheck doesn't support zsh.
      echo "[PASS] $(/usr/bin/basename "${shell_file}")"
    else
      echo "[FAIL] $(/usr/bin/basename "${shell_file}")"
      ERRORS+=("${shell_file}")
      # If shellcheck fails add failing file name to array
    fi
}


function main {

  check_shellcheck

  declare -a ERRORS
  declare -a FILES

  find_files
  analyse_shell_scripts


  if [[ ${#ERRORS[@]} -eq 0 ]]; then
    # If ERRORS empty then 
    echo "[PASS] No errors, hooray"
    exit 0
  else
    # If ERRORS not empty, print the names of files which failed
    echo "[FAIL] These files failed linting: ${ERRORS[*]}"
    exit 1
  fi
}

main "$@"