feat(podman): add method to generate podman based docker image package

resources/com/cadoles/podman/nfpm.yaml.gotmpl

@@ -0,0 +1,25 @@
+{{ $serviceName := index ( .Env.IMAGE_NAME | strings.Split "/" | coll.Reverse ) 0 }}
+name: "cadoles-pod-{{ $serviceName }}"
+arch: amd64
+platform: linux
+version: "{{ strings.TrimPrefix "v" ( getenv "IMAGE_TAG" "latest" ) }}"
+version_schema: none
+version_metadata: git
+section: "{{ getenv "PACKAGE_SECTION" "default" }}"
+priority: "{{ getenv "PACKAGE_PRIORITY" "optional" }}"
+maintainer: "{{ getenv "PACKAGE_MAINTAINER" "contact@cadoles.com" }}"
+description: "{{ getenv "PACKAGE_DESCRIPTION" "" }}"
+homepage: "{{ getenv "PACKAGE_HOMEPAGE" "https://forge.cadoles.com" }}"
+license: "{{ getenv "PACKAGE_LICENCE" "GPL-3.0" }}"
+depends:
+  - podman
+scripts:
+    postinstall: post-install.sh
+contents:
+  - packager: deb
+    src: pod.service
+    dst: "/usr/lib/systemd/system/cadoles-pod-{{ $serviceName }}.service"
+  - packager: deb
+    src: pod.conf
+    dst: /etc/cadoles-pod-{{ $serviceName }}.conf
+    type: config|noreplace

resources/com/cadoles/podman/pod.conf.gotmpl

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+PODMAN_ARGS="{{ getenv "PODMAN_ARGS" "" }}"

resources/com/cadoles/podman/pod.service.gotmpl

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+[Unit]
+Description={{ .Env.IMAGE_NAME }} pod service
+Wants=network-online.target
+After=network-online.target
+RequiresMountsFor=/run/containers/storage
+
+[Service]
+Type=simple
+Environment=PODMAN_SYSTEMD_UNIT=%n
+EnvironmentFile=-/etc/cadoles-pod-{{ .Env.IMAGE_NAME }}.conf
+Environment=IMAGE_NAME={{ .Env.IMAGE_NAME }} IMAGE_TAG={{ .Env.IMAGE_TAG }}
+PassEnvironment=PODMAN_ARGS IMAGE_NAME IMAGE_TAG
+Restart=on-failure
+TimeoutStopSec=70
+{{ if getenv "SYSTEMD_EXEC_STARTPRE" "" }}
+ExecStartPre={{ .Env.SYSTEMD_EXEC_STARTPRE }}
+{{ end }}
+ExecStart=/bin/sh -c "podman run ${PODMAN_ARGS} '${IMAGE_NAME}:${IMAGE_TAG}'"
+{{ if getenv "SYSTEMD_EXEC_STARTPOST" "" }}
+ExecStartPost={{ .Env.SYSTEMD_EXEC_STARTPOST }}
+{{ end }}
+
+[Install]
+WantedBy=default.target

resources/com/cadoles/podman/post-install.sh.gotmpl

@@ -0,0 +1,79 @@
+#!/bin/sh
+
+# Adapted from https://nfpm.goreleaser.com/tips/
+
+use_systemctl="True"
+systemd_version=0
+if ! command -V systemctl >/dev/null 2>&1; then
+  use_systemctl="False"
+else
+  systemd_version=$( systemctl --version | head -1 | sed 's/systemd //g' | cut -d' ' -f1 )
+fi
+
+SERVICE_NAME="cadoles-pod-{{ .Env.IMAGE_NAME }}"
+
+cleanup() {
+  if [ "${use_systemctl}" = "False" ]; then
+    rm -f /usr/lib/systemd/system/$SERVICE_NAME.service
+  else
+    rm -f /etc/chkconfig/$SERVICE_NAME
+    rm -f /etc/init.d/$SERVICE_NAME
+  fi
+}
+
+cleanInstall() {
+  if [ "${use_systemctl}" = "False" ]; then
+    if command -V chkconfig >/dev/null 2>&1; then
+      chkconfig --add $SERVICE_NAME
+    fi
+
+    service $SERVICE_NAME restart ||:
+  else
+    if [ "${systemd_version}" -lt 231 ]; then
+      printf "\033[31m systemd version %s is less then 231, fixing the service file \033[0m\n" "${systemd_version}"
+      sed -i "s/=+/=/g" /usr/lib/systemd/system/$SERVICE_NAME.service
+    fi
+    systemctl daemon-reload ||:
+    systemctl unmask $SERVICE_NAME ||:
+    systemctl preset $SERVICE_NAME ||:
+    systemctl enable $SERVICE_NAME ||:
+    systemctl restart $SERVICE_NAME ||:
+  fi
+}
+
+upgrade() {
+  if [ "${use_systemctl}" = "False" ]; then
+    service $SERVICE_NAME restart ||:
+  else
+    if [ "${systemd_version}" -lt 231 ]; then
+      printf "\033[31m systemd version %s is less then 231, fixing the service file \033[0m\n" "${systemd_version}"
+      sed -i "s/=+/=/g" /usr/lib/systemd/system/$SERVICE_NAME.service
+    fi
+    systemctl daemon-reload ||:
+    systemctl restart $SERVICE_NAME ||:
+  fi
+
+  echo 'Cleaning up unused images...'
+  podman image prune -f --filter "reference={{ .Env.IMAGE_NAME }}"
+}
+
+action="$1"
+if  [ "$1" = "configure" ] && [ -z "$2" ]; then
+  action="install"
+elif [ "$1" = "configure" ] && [ -n "$2" ]; then
+  action="upgrade"
+fi
+
+case "$action" in
+  "1" | "install")
+    cleanInstall
+    ;;
+  "2" | "upgrade")
+    upgrade
+    ;;
+  *)
+    cleanInstall
+    ;;
+esac
+
+cleanup