update

#!/usr/bin/env bash

test -z "${DEBUG}" || set -x

: "${UPDATE_LIST:=}"

for d in $UPDATE_LIST; do
  hi="$(tput bold; tput setaf 7; tput setab 1;)"
  warn="${hi}WARNING$(tput sgr0): unable to update ${d} >>>"
  warnRepo="${warn} not a git repo."
  warnBranch="${warn} not on main."
  warnDirty="${warn} DIRTY."

  # test for git repo
  test -d "$d/.git" || { echo -e "$warnRepo" >&2; continue; }
  pushd "$d" > /dev/null || exit

  git diff --no-ext-diff --quiet --exit-code \
    || { echo -e "$warnDirty" >&2; continue; }

  # current branch
  _branch=$(git symbolic-ref HEAD 2>/dev/null)
  test -n "$_branch" || _branch=$(git describe --contains --all HEAD)
  test -n "$_branch" || _branch=$(git rev-parse --short HEAD)
  _branch=${_branch##refs/heads/}


  case $_branch in
    master)  git pull --quiet origin "$_branch" > /dev/null ;;
    main)    git pull --quiet origin "$_branch" > /dev/null ;;
    ?|*)     echo -e "$warnBranch" >&2; continue            ;;
  esac
  popd > /dev/null || exit
done