fix: add missing implementation for Tencent Kona JDK 21

bin/kona21.bash

@@ -0,0 +1,104 @@
+#!/usr/bin/env bash
+set -e
+set -Euo pipefail
+
+TEMP_DIR=$(mktemp -d)
+trap 'rm -rf ${TEMP_DIR}' EXIT
+
+if [[ "$#" -lt 2 ]]
+then
+	echo "Usage: ${0} metadata-directory checksum-directory"
+	exit 1
+fi
+
+# shellcheck source=bin/functions.bash
+source "$(dirname "${0}")/functions.bash"
+
+VENDOR='kona'
+METADATA_DIR="${1}/${VENDOR}"
+CHECKSUM_DIR="${2}/${VENDOR}"
+
+ensure_directory "${METADATA_DIR}"
+ensure_directory "${CHECKSUM_DIR}"
+
+function download {
+	local tag_name="${1}"
+	local asset_name="${2}"
+	local filename="${asset_name}"
+
+	local url="https://github.com/Tencent/TencentKona-21/releases/download/${tag_name}/${asset_name}"
+	local metadata_file="${METADATA_DIR}/${filename}.json"
+	local archive="${TEMP_DIR}/${filename}"
+
+	if [[ -f "${metadata_file}" ]]
+	then
+		echo "Skipping ${filename}"
+	else
+		download_file "${url}" "${archive}" || return 1
+
+		local VERSION=""
+		local JAVA_VERSION=""
+		local RELEASE_TYPE=""
+		local OS=""
+		local ARCH=""
+		local EXT=""
+		local FEATURES=""
+
+		# shellcheck disable=SC2016
+		local regex='s/^TencentKona-([0-9b.]{1,})(?:[_-](ea))?[-_]jdk_(linux|macosx|windows)-(aarch64|x86_64)(?:_(notarized|signed))?\.(tar\.gz|zip)$/VERSION="$1" RELEASE_TYPE="$2" OS="$3" ARCH="$4" JAVA_VERSION="$1" FEATURES="$5" EXT="$6"/g'
+
+		# Parse meta-data from file name
+		eval "$(perl -pe "${regex}" <<< "${asset_name}")"
+
+		if [[ -z "${RELEASE_TYPE}" ]]
+		then
+			RELEASE_TYPE="ga"
+		fi
+
+		if [[ -z "${VERSION}" ]]
+		then
+			echo "Unable to parse ${asset_name}"
+			return 1
+		fi
+
+		local json
+		json="$(metadata_json \
+			"${VENDOR}" \
+			"${filename}" \
+			"$(normalize_release_type "${RELEASE_TYPE}")" \
+			"${VERSION}" \
+			"${JAVA_VERSION}" \
+			'hotspot' \
+			"$(normalize_os "${OS}")" \
+			"$(normalize_arch "${ARCH}")" \
+			"${EXT}" \
+			'jdk' \
+			"${FEATURES}" \
+			"${url}" \
+			"$(hash_file 'md5' "${archive}" "${CHECKSUM_DIR}")" \
+			"$(hash_file 'sha1' "${archive}" "${CHECKSUM_DIR}")" \
+			"$(hash_file 'sha256' "${archive}" "${CHECKSUM_DIR}")" \
+			"$(hash_file 'sha512' "${archive}" "${CHECKSUM_DIR}")" \
+			"$(file_size "${archive}")" \
+			"${filename}"
+		)"
+
+		echo "${json}" > "${metadata_file}"
+		rm -f "${archive}"
+	fi
+}
+
+RELEASE_FILE="${TEMP_DIR}/releases-${VENDOR}-21.json"
+download_github_releases 'Tencent' 'TencentKona-21' "${RELEASE_FILE}"
+
+versions=$(jq -r '.[].tag_name' "${RELEASE_FILE}" | sort -V)
+for version in ${versions}
+do
+	assets=$(jq -r  ".[] | select(.tag_name == \"${version}\") | .assets[] | select(.content_type | startswith(\"application\")) | select(.name | contains(\"_source\") | not) | select(.name | endswith(\"md5\") | not) | .name" "${RELEASE_FILE}")
+	for asset in ${assets}
+	do
+		download "${version}" "${asset}" || echo "Cannot download ${asset}"
+	done
+done
+
+jq -s -S . "${METADATA_DIR}"/Tencent*.json > "${METADATA_DIR}/all.json"