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#!/usr/bin/env bash

# This script was adapted from fkooman: https://git.sr.ht/~fkooman/vpn-daemon/tree/main/item/make_release.sh. Thanks!
#
# Make a release of the version specified in internal/commonver/commonver.go and automatically release the artifacts
#

# Fail if error
set -e

echo "building $(git log -n 1 | head -n 1)"
BRANCH="main"
PROJECT_NAME=$(basename "${PWD}")
PROJECT_VERSION=$(grep -o 'const Version = "[^"]*' internal/commonver/commonver.go | cut -d '"' -f 2)
PRERELEASE=false

while [[ "$#" -gt 0 ]]; do
    case $1 in
        -p|--prerelease) PRERELEASE=true ;;
		-v|--version) PROJECT_VERSION="$2"; shift ;;
        *) echo "Unknown parameter passed: $1"; exit 1 ;;
    esac
    shift
done

RELEASE_DIR="${PWD}/release"
KEY_ID=227FF3F8F829D9A9314D9EBA02BB8048BBFF222C
if [ "$PRERELEASE" = true ]; then
    KEY_ID=7A73D62AD0F084571A32C960D57104BF9B223CBF
fi

if ! command -v "tar" &>/dev/null; then
    echo "please install tar for archiving the code"
    exit 1
fi

if ! command -v "wget" &>/dev/null; then
    echo "please install wget for getting the discovery files"
    exit 1
fi

if ! command -v "gpg" &>/dev/null; then
    echo "please install gpg for signing the archive"
    exit 1
fi

if ! command -v "minisign" &>/dev/null; then
    echo "please install minisign for signing the archive"
    exit 1
fi

if [ "$(git tag -l "${PROJECT_VERSION}")" ]; then
    echo "Version: ${PROJECT_VERSION} already has a tag"
    exit 1
fi

mkdir -p "${RELEASE_DIR}"

if [ -f "${RELEASE_DIR}/${PROJECT_NAME}-${PROJECT_VERSION}.tar.xz" ]; then
    echo "Version ${PROJECT_VERSION} already has a release!"
    exit 1
fi

# Archive repository
git archive --prefix "${PROJECT_NAME}-${PROJECT_VERSION}/" "${BRANCH}" | tar -xf -

# We run "make vendor" in it to add all dependencies to the vendor directory
# so we have a self contained source archive.
cd "${PROJECT_NAME}-${PROJECT_VERSION}"
go mod vendor

# Get discovery files and verify signature
echo "getting and verifying discovery files..."
wget -q https://disco.eduvpn.org/v2/organization_list.json -O internal/discovery/organization_list.json
wget -q https://disco.eduvpn.org/v2/organization_list.json.minisig -O internal/discovery/organization_list.json.minisig
minisign -Vm "internal/discovery/organization_list.json" -P RWRtBSX1alxyGX+Xn3LuZnWUT0w//B6EmTJvgaAxBMYzlQeI+jdrO6KF || minisign -Vm "internal/discovery/organization_list.json" -P RWQKqtqvd0R7rUDp0rWzbtYPA3towPWcLDCl7eY9pBMMI/ohCmrS0WiM
wget -q https://disco.eduvpn.org/v2/server_list.json -O internal/discovery/server_list.json
wget -q https://disco.eduvpn.org/v2/server_list.json.minisig -O internal/discovery/server_list.json.minisig
minisign -Vm "internal/discovery/server_list.json" -P RWRtBSX1alxyGX+Xn3LuZnWUT0w//B6EmTJvgaAxBMYzlQeI+jdrO6KF || minisign -Vm "internal/discovery/server_list.json" -P RWQKqtqvd0R7rUDp0rWzbtYPA3towPWcLDCl7eY9pBMMI/ohCmrS0WiM
cd ..
tar -cJf "${RELEASE_DIR}/${PROJECT_NAME}-${PROJECT_VERSION}.tar.xz" "${PROJECT_NAME}-${PROJECT_VERSION}"
rm -rf "${PROJECT_NAME}-${PROJECT_VERSION}"

echo "signing using gpg and minisign"
gpg --default-key ${KEY_ID} --armor --detach-sign "${RELEASE_DIR}/${PROJECT_NAME}-${PROJECT_VERSION}.tar.xz"
minisign -Sm "${RELEASE_DIR}/${PROJECT_NAME}-${PROJECT_VERSION}.tar.xz"