Generates the diff between two Fedora Flatpak runtimes

diff-fedora-runtime

#!/bin/bash

# Generates the diff between two Fedora Flatpak runtimes.
# Examples:
#   # This will generate the diff between two given runtimes
#   generate-runtime-diff.sh flatpak-runtime-f30-3020190604123149.1 flatpak-runtime-f30-3020190612151453.1
#
#   # This will diff the two latest runtimes for the given Fedora version
#   generate-runtime-diff.sh 29
#
#   # This will diff the two latest runtimes for the currently running Fedora version
#   generate-runtime-diff.sh

runtimes=""
fedora_version="$1"

if [ -z "$1" ]; then
   echo "No Fedora version was specified, using the one from /etc/os-release"
   . /etc/os-release
   fedora_version="$VERSION_ID"
fi

if [ -z "$2" ]; then
  # get two latest runtimes
  runtimes=($(koji list-builds --package flatpak-runtime --state COMPLETE | grep "f$fedora_version" | grep '\.1' | tail -n 2 | awk '{ print $1 }'))
else
  runtimes=("$1 $2")
fi

for runtime in "${runtimes[@]}";
do
  # https://kojipkgs.fedoraproject.org//packages/flatpak-runtime/f30/3020190612151453.1/data/logs/x86_64-build.log
  version_link=$(echo "$runtime" | awk -F'-' '{ print $3"/"$4 }')
  rm -f /tmp/"$runtime".log
  if ! wget --quiet "https://kojipkgs.fedoraproject.org//packages/flatpak-runtime/$version_link/data/logs/x86_64-build.log" -O /tmp/"$runtime".log; then
    exit 1
  fi
done

files_to_diff=""

for runtime in "${runtimes[@]}";
do
  rm -f /tmp/"$runtime".packages
  awk -v start=2 '/Installed:/{n++;next};n==start;n==start+1{exit}' /tmp/"$runtime".log | awk -v 'RS=\n\n' '1;{exit}' > /tmp/"$runtime".packages
  files_to_diff="$files_to_diff /tmp/$runtime.packages"
done

echo "---${runtimes[0]}"
echo "+++${runtimes[1]}"
diff -U 0 $files_to_diff | sed '/^@@/ d' | sed '/^---/ d' | sed '/^+++/ d'