Update all AUR repos

update-aur.sh

# vi:syntax=sh
#!/usr/bin/env bash
# AUR updated
# Checks all directories for updates, then
# runs makepkg -si for each updated git repo

checkIfRepo(){
  stat "$1" > /dev/null || return 1;
  cd $1; echo "Checking $1"
  git status --porcelain >/dev/null && cd .. || return 1; # A fatal error if $PWD is not a git repos
}

updateRepo() {
  local dir="$1"
  cd $dir # switch to the git repo
  git checkout master >/dev/null 2>&1
  git remote update -p >/dev/null
  reslog=$(git log HEAD..origin/master --oneline)
  if [[ "${reslog}" != "" ]] ; then
    echo "$dir" needs updating
    git merge --ff-only origin/master
    cd ..
    return 0
  else
    cd ..
    return 1
  fi
}

update() {
  local dir="$1"
  cd $dir && makepkg -si --needed
  cd ..
}

update_all() {
  for thing in "$@"; do
    update $thing
  done;
}


usage(){
  echo "arch updater"
  echo "usage:"
  echo "run it in the directory containing all your things"
  echo "assumes all your aur stuff is in a single directory"
}

directory_to_update=${1}

if [ -z "$directory_to_update" ] ; then
    echo "no directory passed in, using current directory"
    directory_to_update=$PWD
fi 
echo "Updating git repo's in directory: $directory_to_update"

need_update=""

for dir in $(ls $directory_to_update); do
  if [ -d "${dir}" ] ; then
    if checkIfRepo $dir ; then
      if updateRepo $dir ; then
        need_update="${need_update} $dir"
      fi
    fi
  fi
done

echo "=================================="
echo "need updating:"
echo $need_update | tr " " "\n"

if [ -z "$need_update" ] ; then
  echo "nothing to do"
else
  update_all "$need_update"
  echo "all done!"
fi