Fancy git commit

git-c

#!/bin/bash

# Author: Steel Brain <i@steelbrain.me>
# Name: Git Commit
# Steps:
# - Check if jq is installed or not (need it for parsing package.json)
# - Shows unstaged files
# - Shows staged files
# - Confirms the user they want to proceed
# - Execute the build step and check in any files it modifies
# - Invoke git commit with provided args


function color {
  local COLOR=$1
  local TEXT=$2
  printf "$(tput setaf $COLOR)$TEXT$(tput sgr0)"
}

function indent {
  echo "$1" | sed 's/^/  /'
}
function invoke_pre_commit {
  ${@:2} | sed "s/^/[$1] /"
  if [ "${PIPESTATUS[0]}" != "0" ]; then
    color 1 "The step '$1' exited with non-zero code\n"
    exit 1
  fi
}
function get_unstaged_files {
  git diff --name-only
}
function get_staged_files {
  git diff --name-only --cached
}

if [ "$(which jq)" = "" ]; then
  echo "You don't have jq installed on your system"
  echo "Do 'brew install jq' if you're on a mac or 'sudo apt install -y jq' if on Ubuntu"
  exit 1
fi

UNSTAGED_FILES=$(get_unstaged_files)
if [ "$UNSTAGED_FILES" != "" ]; then
  printf "These files have not yet been staged\n\n"
  color 1 "$(indent "$UNSTAGED_FILES")\n\n"
fi
STAGED_FILES=$(get_staged_files)
if [ "$STAGED_FILES" != "" ]; then
  printf "These files have been staged\n\n"
  color 2 "$(indent "$STAGED_FILES")\n\n"
fi
if [ "$STAGED_FILES" != "" ] || [ "$UNSTAGED_FILES" != "" ]; then
  read -n 1 -r -p "$(color 5 "Are you sure you want to continue?") "
  printf "\n"
  if [[ ! $REPLY =~ ^[Yy]$ ]]; then
    color 3 "The operation was cancelled\n"
    exit 1
  fi
fi

if [ -f package.json ] && [ "$(jq -r '.scripts.build' < package.json)" != "null" ]; then
  color 3 "Executing build script\n"
  UNSTAGED_FILES_BEFORE="$(get_unstaged_files)"
  invoke_pre_commit build npm run build
  UNSTAGED_FILES_AFTER="$(get_unstaged_files)"

  UNSTAGED_FILES_BETWEEN="$(echo ${UNSTAGED_FILES_BEFORE[@]} ${UNSTAGED_FILES_AFTER[@]} | tr ' ' '\n' | sort | uniq -u)"
  if [ "$UNSTAGED_FILES_BETWEEN" != "" ]; then
    color 3 "The following new files have been checked in following build step:\n"
    indent "$UNSTAGED_FILES_BETWEEN"
    git add ${UNSTAGED_FILES_BETWEEN[@]}
  fi
fi

git commit "$@"