#!groovy

def label = PodTemplates.podLabel()
def repositoryCreds = "harbor-repository-creds"

podTemplate(
    label: label,
    name: "pipeline-worker",
    yaml: podTemplates.podYaml(
        kaniko: true,
        alpine: true,
    ),
) {
    node (label) {
        def workspace = pwd()

        stage ("Prepare Kaniko") {
            container ("kaniko") {
                withCredentials([usernameColonPassword(
                    credentialsId: repositoryCreds,
                    variable: "dCreds",
                )]) {
                    def dockerJSON = """{
                        "auths": {
                            "${repository}": {
                                "auth": "${dcreds.bytes.encodeBase64().toString()}"
                            }
                        }
                    }"""
                    sh """
                        set +x
                        echo '${dockerJSON}' > /kaniko/.docker/config.json
                    """
                }
            }
        }

        stage("Download RCON") {
            container("alpine") {
                sh """
                    apk add --no-cache curl jq
                    VER="\$(curl --silent "https://api.github.com/repos/gorcon/rcon-cli/releases/latest" | jq -r '.tag_name' | sed -r 's/v//')"
                    curl --silent \\
                        --location \\
                        "https://github.com/gorcon/rcon-cli/releases/download/v\${VER}/rcon-\${VER}-amd64_linux.tar.gz" \\
                        | \\
                        tar -z -x -C /tmp -f -
                    cp /tmp/rcon-\${VER}-amd64_linux/rcon "${workspace}/rcon"
                """
            }
        }

        stage("Build Image") {
            container("kaniko") {
                def DF = """FROM ${repository}/library/alpine:latest

RUN addgroup -S -g 1000 rcon && \\
    adduser --disabled-password -G rcon --gecos "rcon" --home "/home/rcon" --shell "/sbin/nologin" --uid 1000 rcon

COPY --chown=rcon:rcon ./rcon /home/rcon/rcon

USER rcon:rcon
WORKDIR /home/rcon

ENTRYPOINT ["/bin/sh"]
"""
                writeFile(file: workspace + "/Dockerfile", text: DF)
                sh "/kaniko/executor --context \"${workspace}\" -f \"${workspace}/Dockerfile\" --destination \"${repository}/library/rcon:latest\" --single-snapshot"
            }
        }
    }
}