#!/usr/bin/env bash

set -euo pipefail

ROOTDIR=$(realpath "$(dirname "${BASH_SOURCE[0]}")/../")

export ROOTDIR

cd "$ROOTDIR"

source "./includes/utils.sh"

ARCH="${1:-}"

if [[ "$ARCH" != "x86_64" && "$ARCH" != "arm64" ]]; then

fatal 129 "Missing architecture argument"

fi

GIT_VERSION="$(cat ./git_version)"

step "Generating layer zip from ${ARCH} image"

filename="layer-git-${GIT_VERSION}-${ARCH}.zip"

if [[ -f "outputs/${filename}" ]]; then

info "Skipping extraction, layer zip already exists (${filename})"

else

info "Extracting /opt using a temporary Docker container"

rm -rf .cache

docker run --rm -v "${ROOTDIR}/.cache:/tmp/layer" lambda-git-build:${GIT_VERSION}-${ARCH} bash -c \

"cd /opt && zip -yr /tmp/layer/layer.zip ." >docker-run.log 2>&1 \

|| fatal 133 "Unable to extract layer data. Refer to ${ROOTDIR}/docker-run.log for details."

rm -f docker-run.log

info "Moving extracted data into target directory"

mkdir -p outputs

mv .cache/layer.zip outputs/${filename} || fatal 134 "Unable to move layer zip to target directory"

rm -rf .cache

fi

info "layer-git-${GIT_VERSION}-${ARCH}.zip created successfully"