#! /bin/sh
set -e

# When run inside docker (from below), we do build and drop result in /release
if [ "$1" = "--inside-docker" ]; then
    echo "Inside docker: starting build"
    VER="$2"
    PLTFM="$3"
    git clone /src /build
    cd /build || exit
    poetry export --without-hashes > /tmp/requirements.txt
    python3 -m pip install -r /tmp/requirements.txt
    ./configure
    make VERSION="$VER"
    make install DESTDIR=/"$VER-$PLTFM" RUST_PROFILE=release
    cd /"$VER-$PLTFM" && tar cvfz /release/clightning-"$VER-$PLTFM".tar.gz -- *
    echo "Inside docker: build finished"
    exit 0
fi

FORCE_UNCLEAN=false
VERIFY_RELEASE=false

ALL_TARGETS="bin-Fedora-28-amd64 bin-Ubuntu docker sign"
# ALL_TARGETS="bin-Fedora-28-amd64 bin-Ubuntu tarball deb docker sign"

for arg; do
    case "$arg" in
    --force-version=*)
	    FORCE_VERSION=${arg#*=}
        ;;
    --force-unclean)
        FORCE_UNCLEAN=true
        ;;
    --force-mtime=*)
        FORCE_MTIME=${arg#*=}
        ;;
    --verify)
        VERIFY_RELEASE=true
        ;;
    --help)
        echo "Usage: [--force-version=<ver>] [--force-unclean] [--force-mtime=YYYY-MM-DD] [--verify] [TARGETS]"
        echo Known targets: "$ALL_TARGETS"
	    echo "Example: tools/build-release.sh"
	    echo "Example: tools/build-release.sh --force-version=v23.05 --force-unclean --force-mtime=2023-05-01 bin-Fedora-28-amd64 bin-Ubuntu sign"
	    echo "Example: tools/build-release.sh --verify"
	    echo "Example: tools/build-release.sh --force-version=v23.05 --force-unclean --force-mtime=2023-05-01 --verify"
        echo "Example: tools/build-release.sh docker"
        echo "Example: tools/build-release.sh --force-version=v23.05 --force-unclean --force-mtime=2023-05-01 docker"
        exit 0
        ;;
    -*)
        echo "Unknown arg $arg" >&2
        exit 1
        ;;
    *)
        break
        ;;
    esac
    shift
done

echo "Verify Release: $VERIFY_RELEASE"
echo "Force mTime: $FORCE_MTIME"
echo "Force Unclean: $FORCE_UNCLEAN"

VERSION=$(git tag --points-at HEAD)
echo "Tagged Version: $VERSION"
VERSION=${FORCE_VERSION:-$VERSION}
echo "Version: $VERSION"

if [ "$VERSION" = "" ]; then
    echo "No tagged version at HEAD?" >&2
    exit 1
fi

# `status --porcelain -u no` suppressed modified!  Bug reported...
if [ "$(git diff --name-only)" != "" ] && ! $FORCE_UNCLEAN; then
    echo "Not a clean git directory" >&2
    exit 1
fi

# Skip 'v' here in $VERSION
MTIME=${FORCE_MTIME:-$(sed -n "s/^## \\[.*${VERSION#v}\\] - \\([-0-9]*\\).*/\\1/p" < CHANGELOG.md)}
echo "mTime: $MTIME"

if [ -z "$MTIME" ]; then
    echo "No date found for $VERSION in CHANGELOG.md" >&2
    exit 1
fi

if [ "$VERIFY_RELEASE" = "true" ]; then
    if [ -f "SHA256SUMS-$VERSION.asc" ] && [ -f "SHA256SUMS-$VERSION" ]; then
        ALL_TARGETS="bin-Ubuntu"
    else
        echo "Unable to verify. File SHA256SUMS-$VERSION or SHA256SUMS-$VERSION.asc not found in the root."
		exit 1
    fi
fi

if [ "$#" = 0 ]; then
    TARGETS=" $ALL_TARGETS "
else
    TARGETS=" $* "
fi

RELEASEDIR="$(pwd)/release"
BARE_VERSION="$(echo "${VERSION}" | sed 's/^v//g')"
TARBALL="${RELEASEDIR}/lightningd_${BARE_VERSION}.orig.tar.bz2"
DATE=$(date +%Y%m%d%H%M%S)
echo "Targets: $TARGETS"
echo "Release Directory: $RELEASEDIR"
echo "Tarball File: $TARBALL"
echo "Current Timestamp: $DATE"

# submodcheck needs to know if we have lowdown
./configure --reconfigure
# If it's a completely clean directory, we need submodules!
make submodcheck
mkdir -p "$RELEASEDIR"

echo "Creating Zip File"
# delete zipfile if exists
[ -f "$RELEASEDIR/clightning-$VERSION.zip" ] && rm "$RELEASEDIR/clightning-$VERSION.zip"
mkdir "$RELEASEDIR/clightning-$VERSION"
# git archive won't go into submodules :(; We use tar to copy
git ls-files -z --recurse-submodules | tar --null --files-from=- -c -f - | (cd "$RELEASEDIR/clightning-$VERSION" && tar xf -)
# tar can set dates on files, but zip cares about dates in directories!
# We set to local time (not "$MTIME 00:00Z") because zip uses local time!
find "$RELEASEDIR/clightning-$VERSION" -print0 | xargs -0r touch --no-dereference --date="$MTIME"
# Seriously, we can have differing permissions, too.  Normalize.
# Directories become drwxr-xr-x
find "$RELEASEDIR/clightning-$VERSION" -type d -print0 | xargs -0r chmod 755
# Executables become -rwxr-xr-x
find "$RELEASEDIR/clightning-$VERSION" -type f -perm -100 -print0 | xargs -0r chmod 755
# Non-executables become -rw-r--r--
find "$RELEASEDIR/clightning-$VERSION" -type f ! -perm -100 -print0 | xargs -0r chmod 644
# zip -r doesn't have a deterministic order, and git ls-files does.
LANG=C git ls-files --recurse-submodules | sed "s@^@clightning-$VERSION/@" | (cd release && zip -@ -X "clightning-$VERSION.zip")
rm -r "$RELEASEDIR/clightning-$VERSION"
echo "Zip File Created"

for target in $TARGETS; do
    platform=${target#bin-}
    [ "$platform" != "$target" ] || continue
    case $platform in
    Fedora-28-amd64)
        echo "Building Fedora Image"
        DOCKERFILE=contrib/docker/Dockerfile.builder.fedora
        TAG=fedora
        docker build -f $DOCKERFILE -t $TAG --load .
        docker run --rm=true -v "$(pwd)":/src:ro -v "$RELEASEDIR":/release $TAG /src/tools/build-release.sh --inside-docker "$VERSION" "$platform"
        docker run --rm=true -w /build $TAG rm -rf /"$VERSION-$platform" /build
        echo "Fedora Image Built"
        ;;
    Ubuntu)
		for d in focal jammy noble; do
            # Capitalize the first letter of distro
            D=$(echo "$d" | awk '{print toupper(substr($0,1,1))substr($0,2)}')
			echo "Building Ubuntu $D Image"
			docker run --rm -v "$(pwd)":/repo -e FORCE_MTIME="$MTIME" -e FORCE_VERSION="$VERSION" -ti cl-repro-"$d"
            echo "Ubuntu $D Image Built"
		done
        ;;
    *)
        echo "No Dockerfile for $platform" >&2
        exit 1
    esac
done

if [ -z "${TARGETS##* docker *}" ]; then
    echo "Building Docker Images"
    DOCKER_USER="elementsproject"
    echo "Creating multi-platform images tagged as $VERSION and latest"
    # --load does not work with multiarch. Only --push works.
    # ERROR: docker exporter does not currently support exporting manifest lists
    DOCKER_OPTS="--push --platform linux/amd64,linux/arm64,linux/arm/v7"
    DOCKER_OPTS="$DOCKER_OPTS -t $DOCKER_USER/lightningd:$VERSION"
    DOCKER_OPTS="$DOCKER_OPTS -t $DOCKER_USER/lightningd:latest"
    DOCKER_OPTS="$DOCKER_OPTS --cache-to=type=local,dest=/tmp/docker-cache --cache-from=type=local,src=/tmp/docker-cache"    
    echo "Docker Options: $DOCKER_OPTS"
    if sudo docker buildx ls | grep -q 'cln-builder'; then
        sudo docker buildx use cln-builder
    else
        sudo docker buildx create --name=cln-builder --use
    fi
    # shellcheck disable=SC2086
    sudo docker buildx build $DOCKER_OPTS .
    echo "Pushed multi-platform images tagged as $VERSION and latest"
fi

if [ -z "${TARGETS##* sign *}" ]; then
    echo "Signing Release"
    cd release/ || exit
    sha256sum clightning-"$VERSION"* > SHA256SUMS
    gpg -sb --armor -o SHA256SUMS.asc"$(gpgconf --list-options gpg | awk -F: '$1 == "default-key" {print $10}' | tr -d '"')" SHA256SUMS
    cd ..
    echo "Release Signed"
fi

if [ "$VERIFY_RELEASE" = "true" ]; then
    echo "Verifying Release"
    sumfile="SHA256SUMS-${VERSION}"
    # Ensure that the release captains checksum exists at the desired location.
    if [ ! -f "$sumfile" ]; then
        echo "Can not find release captains checksum file \"$sumfile\"".
        echo "You can download it from the repository at:"
        echo "https://github.com/ElementsProject/lightning/releases/tag/$VERSION"
        echo "Place it under the project root as \"$sumfile\"."
        exit 1
    fi
    sumfile="$(pwd)/${sumfile}"
    cd release/ || exit
    # Check that the release captains sum matches. Ignore missing entries as we
    # do not have a repro build for Fedora. Strictly this is not necessary here
    # as we compare our checksums with the release captains checksums later, but
    # it gives a direct hint which specific checksums don't match if so.
    sha256sum --check --ignore-missing "${sumfile}"
    # Creating SHA256SUMS, except Fedora (copy that from theirs)
    grep 'Fedora-28-amd64' "$sumfile" > SHA256SUMS
    sha256sum clightning-"$VERSION"* | grep -v 'bin-Fedora-28-amd64' >> SHA256SUMS
    # compare our and release captain's SHA256SUMS contents
    if cmp -s SHA256SUMS "$sumfile"; then
        echo "SHA256SUMS are Identical"
    else
        echo "Error: SHA256SUMS do NOT Match"
	exit 1
    fi
    # verify release captain signature
    gpg --verify "../SHA256SUMS-$VERSION.asc"
    # create ASCII-armored detached signature
    gpg -sb --armor < SHA256SUMS > SHA256SUMS.new
    echo "Verified Successfully! Signature Updated in release/SHA256SUMS.new"
fi

echo "Building release script finished!!"