#!/bin/bash
# Tool to maintain my pattern for RPM overrides, with the live path a symlink to
# mattnew.  Originally 2017-04-07.  Revamped 2017-09-05 to automate the merge
# like rpmconf-matt; I think this is as much work as I want to put in for now.
set -e
# "let" has stupid behavior of exiting 1.  I'll use $(()) instead.
unfinished_files=0
# Prune /mnt to avoid error message about /mnt/root loop.  There shouldn't be
# any overrides under /mnt . ~ 2017-11-11
for f_new in $(find / -xdev -path '/mnt' -prune -or -name '*.mattnew' -print); do
  f_live="${f_new%.mattnew}"
  expected_target="$(basename "$f_new")"
  if link_target="$(readlink "$f_live")" && [ "$link_target" == "$expected_target" ]; then
    :  # good
  else
    #echo "$f_live"
    echo "- Merging $f_live."
    if rpmconf-matt-merge "$f_live.mattmerge" "$f_live.mattorig" "$f_live.mattnew" "$f_live"; then
      # Commit the merge.
      (
        set -x
        rm "$f_live.mattorig" "$f_live.mattnew"
        mv "$f_live.mattmerge" "$f_live.mattnew"
        mv "$f_live" "$f_live.mattorig"
        ln -s "$expected_target" "$f_live"
      )
      echo "- Merged $f_live."
    else
      unfinished_files=$((unfinished_files+1))
      echo "- Leaving $f_live merge unfinished."
    fi
  fi
done
if [ $unfinished_files -eq 0 ]; then
  echo 'rpm overrides merge complete!'
else
  echo "No more files to consider.  $unfinished_files left unfinished."
fi