#!/bin/bash

if [ $# -eq 0 ]; then
  >&2 echo 'usage: bumpPkgrel [-n] $pkg1 $pkg2 $pkg3 ...'
  exit 1
fi

if [ "x$1" = 'x-n' ]; then
  commit=false
  shift
else
  commit=true
fi

if [ $# -eq 1 ]; then

  cd "$(dirname "$0")"

  pkg="${1%/}"
  cd "${pkg}"
  eval "$(
    sed -n '
      /^pkgrel=/p
      /^_pinned_dependencies=(.*)/p
      /^_pinned_dependencies=([^)]*$/,/)/p
    ' 'PKGBUILD'
  )"
  mapfile -t _pinned_dependencies < <(
    printf '%s\n' "${_pinned_dependencies[@]}" \
    | sed -n '
      s/=.*$//
      /^[^<=>]\+$/ p
    ' \
    | sort -u \
    | join -1 1 -2 2 -o 1.1,2.1 - <(
      find /var/lib/pacman/sync/ -name '*.db' \
        -not -exec tar -Oxzf {} --wildcards '*/desc' \; \
        -not -exec tar -OxJf {} --wildcards '*/desc' \; \
        -not -exec tar -Oxjf {} --wildcards '*/desc' \; \
        -not -exec tar -Oxf {} --wildcards '*/desc' \; \
      2>/dev/null \
      | sed -n '
        /^%\(NAME\|VERSION\)%$/ {
          N
          s/\n/ /
          p
        }
      ' \
      | sed -n '
        /^%NAME%/ {
          N
          s/^%NAME% \(\S\+\)\n%VERSION% \(\S\+\)-\S\+$/\2 \1/
          T
          p
        }
      ' \
      | sort -k2,2 -k1Vr,1 \
      | uniq -f1
    ) \
    | awk '{print $1 "=" $2}'
  )
  sed -i '
    s@^\(pkgrel=\)\('"'"'\?\)[0-9]\+\2$@\1'"$((pkgrel+1))"'@
    /^_pinned_dependencies=(/ {
      :a
        /)/ {
          s@.*@_pinned_dependencies=(\n'"$(printf '  '"'"'%s'"'"'\\n' "${_pinned_dependencies[@]}")"')@
          b
        }
        $! {
          N
          ba
        }
    }
  ' 'PKGBUILD'
  if ${commit}; then
    if [ -d '.git' ] || [ -f '.git' ]; then
      makepkg --printsrcinfo > .SRCINFO
      git commit 'PKGBUILD' '.SRCINFO' -m "${pkg}: rebuild"
      for remote in $(
        git remote
      ); do
        git push "${remote}" || exit 1
      done
      cd ..
      git commit "${pkg}" -m "${pkg}: rebuild"
    else
      git commit 'PKGBUILD' -m "${pkg}: rebuild"
    fi
  fi

else

  printf '%s\n' "$@" \
    | xargs -rn1 "$0"

fi