#!/bin/bash
set -euE

REF_BASE=${1:-master}

REPO=$(git rev-parse --show-toplevel)
COMMIT_BASE=$(git merge-base --fork-point "$REF_BASE")

TMP=$(mktemp -d)
trap "rm -rf '$TMP'" EXIT

function git {
  command git -c advice.detachedHead=false -c init.defaultBranch=main -C "$TMP" "$@"
}

git init -q
git remote add origin "$REPO"
git fetch -q --depth 1 origin "$COMMIT_BASE"
git checkout -q FETCH_HEAD

for i in "$TMP" "$REPO"; do
  pushd "$i" > /dev/null
  echo "Running gencontrol in '$i'"
  ./debian/bin/gencontrol.py
  popd > /dev/null
done

for i in control rules.gen generated.signed-amd64 generated.signed-arm64; do
  diff -ruN "$TMP"/debian/$i "$REPO"/debian/$i | wdiff -dn | colordiff
done