#!/bin/bash
set -eEu
set -v

PIPELINE_ID=$RANDOM
echo ${PIPELINE_ID}

sudo pacman-key --init

# Pull Repo

## Needed so pacman doesnt complain.
repo-add "/repo/${AUR_REPO_NAME}.db.tar.xz"
sudo pacman -Syu --noconfirm minio-client pacman-contrib &>/dev/null # Setup tooling

mcli alias set s3 https://s3.tobiasmanske.de "${REPO_ACCESS_KEY}" "${REPO_SECRET_KEY}"

# LOCK
LOCK=""

while [[ "${LOCK}" != "${PIPELINE_ID}" ]]; do
	LOCK=$(mcli cat s3/repo/LOCK)
	if [[ "${LOCK}" == "FREE" ]]; then
		echo $PIPELINE_ID | mcli pipe s3/repo/LOCK
	fi
	echo "Waiting for lock with id $PIPELINE_ID..."
	sleep $((RANDOM % 10))

done

unlock() {
	if [[ "${LOCK}" == "${PIPELINE_ID}" ]]; then
		echo "FREE" | mcli pipe s3/repo/LOCK
	fi

}

trap unlock EXIT INT TERM

echo "Pulling Repository"
(
	mcli mirror --overwrite s3/repo/x86_64 /repo &>/dev/null
	rm "/repo/${AUR_REPO_NAME}.db"
	rm "/repo/${AUR_REPO_NAME}.db.sig"
	rm "/repo/${AUR_REPO_NAME}.files"
	# rm "/repo/${AUR_REPO_NAME}.files.sig"
	ln -sf "/repo/${AUR_REPO_NAME}.db.tar.xz" "/repo/${AUR_REPO_NAME}.db"
	ln -sf "/repo/${AUR_REPO_NAME}.files.tar.xz" "/repo/${AUR_REPO_NAME}.files"
	ln -sf "/repo/${AUR_REPO_NAME}.db.tar.xz.sig" "/repo/${AUR_REPO_NAME}.db.sig"
	ln -sf "/repo/${AUR_REPO_NAME}.files.tar.xz.sig" "/repo/${AUR_REPO_NAME}.files.sig"
) &>/dev/null 

if ! (aur repo >/dev/null 2>&1); then
	printf "Aur repo not initialized, initializing /repo...\n"
	repo-add "/repo/${AUR_REPO_NAME}.db.tar.xz"
fi

# Keyring Signing Key
sudo pacman-key --add trustroot.asc
gpg --import --batch trustroot.asc
sudo pacman-key --lsign 10BE06BC275CE0E17373B368F67996C486D1B56B

# Setup signing
echo "${BUILD_GPG_KEY:-}" | base64 -d | gpg --import --batch
echo "C3FE87CFB8F8D503AE03EC1C033E7F3DC71FE89E:6:" | gpg --import-ownertrust --batch


sudo pacman --noconfirm -Syu archlinux-keyring &>/dev/null

git clone --recursive https://git.tobiasmanske.de/archlinux-repo/package_sources.git packages &>/dev/null
cd packages

touch buildqueue
## OBTAIN PACKAGES TO BUILD

git submodule update --remote --merge &>/dev/null # Make sure we are up to date if something is linked as a submodule
#
find . -name PKGBUILD -execdir sh -c 'makepkg --printsrcinfo > .SRCINFO' \;

# Obtain version of downloaded packages
find . -iname PKGBUILD -exec dirname {} \; | aur srcver --no-prepare - >vcs

# Rebuild all git packages
if [ ! -z "$NO_GIT_REBUILD" ]; then
	cut -f1 vcs | grep -e "-git$" | tee -a buildqueue
fi

# add all outdated packages to the build queue
aur repo --list | aur vercmp -q -p vcs | tee -a buildqueue

# Build missing packages
comm -23 <(cut -f1 vcs | sort) <(pacman -Slq "${AUR_REPO_NAME}" | sort) | tee -a buildqueue

# Build all packages defined in buildqueue
while read -r i; do
	cat "$i"/.SRCINFO
done <buildqueue | aur graph | tsort | tac >queue
echo
echo QUEUE
echo
cat queue

if wc -l queue | grep -q "^0 "; then
	echo "Nothing to build, exiting."
	exit 0
fi

## BUILD

aur build -S --noconfirm -a queue --no-sync --margs -s

## Upload to repo
mcli mirror --overwrite /repo s3/repo/x86_64