PKGBUILDs/devel/update-from-regular.sh

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#!/bin/bash
set -e
package=$1
variant=$2
official_packages=${OFFICIAL_PACKAGES:-/run/media/files3/other_projects/arch-packages}
current_variant_file=$package/$variant/PKGBUILD
source "$current_variant_file"
variantver=$pkgver
echo "variant version: $variantver"
regular_dir=$official_packages/$package
if [[ ! -e $regular_dir ]]; then
pushd "$official_packages"
pkgctl repo clone "$package"
popd
else
git -C "$regular_dir" pull --rebase origin main
fi
regular_file=$regular_dir/PKGBUILD
source "$regular_file"
regularver=$pkgver
echo "regular version: $regularver"
if [[ $variantver == "$regularver" ]]; then
echo "nothing to do, versions are the same"
exit 0
fi
commits=($(git -C "$regular_dir" log -n 8 --pretty=format:%H HEAD~1 "PKGBUILD"))
tempfile=/tmp/regular-pkgbuild
basecomit=
for commit in "${commits[@]}"; do
echo "checking diff as of commit $commit"
git -C "$regular_dir" show "$commit:PKGBUILD" > "$tempfile"
source "$tempfile"
if [[ $variantver != "$pkgver" ]]; then
continue
fi
echo "commit $commit is last commit of regular package with version $pkgver"
basecomit=$commit
break
done
if [[ ! $basecomit ]]; then
echo "unable to find commit of regular package with variant version"
exit 1
fi
cd "$package/$variant"
git -C "$regular_dir" diff "$basecomit..origin/main" -- "PKGBUILD" > regular.diff
patch -p1 -i regular.diff