Improve and extend setup.sh

Add subcommands 'debug show-mail-logs', 'inspect', 'login'. Add option
'-c' to specify the name of the running container. Add option '-i' to
specify the image name.

setup.sh

@@ -2,14 +2,41 @@
 
 ##
 # Wrapper for various setup scripts included in the docker-mailserver
-##
+#
 
-if [ -z "$DOCKER_IMAGE" ]; then
-  DOCKER_IMAGE=tvial/docker-mailserver:latest
+INFO=$(docker ps \
+  --no-trunc \
+  --format="{{.Image}}\t{{.Names}}\t{{.Command}}" | \
+  grep '/bin/sh -c /usr/local/bin/start-mailserver.sh')
+
+IMAGE_NAME=$(echo $INFO | awk '{print $1}')
+CONTAINER_NAME=$(echo $INFO | awk '{print $2}')
+
+if [ -z "$IMAGE_NAME" ]; then
+  IMAGE_NAME=tvial/docker-mailserver:latest
 fi
 
+_inspect() {
+  if _docker_image_exists "$IMAGE_NAME"; then
+    echo "Image: $IMAGE_NAME"
+  else
+    echo "Image: '$IMAGE_NAME' can’t be found."
+  fi
+  if [ -n "$CONTAINER_NAME" ]; then
+    echo "Container: $CONTAINER_NAME"
+  else
+    echo "Container: Not running, please start docker-mailserver."
+  fi
+}
+
 _usage() {
-  echo "Usage: $0 <subcommand> <subcommand> [args]
+  echo "Usage: $0 [-i IMAGE_NAME] [-c CONTAINER_NAME] <subcommand> <subcommand> [args]
+
+OPTIONS:
+
+  -i IMAGE_NAME     The name of the docker-mailserver image, by default
+                    'tvial/docker-mailserver:latest'.
+  -c CONTAINER_NAME The name of the running container.
 
 SUBCOMMANDS:
 
@@ -27,16 +54,57 @@ SUBCOMMANDS:
   debug:
 
     $0 debug fetchmail
+    $0 debug show-mail-logs
+    $0 debug inspect
+    $0 debug login
 "
   exit 1
 }
 
-_docker() {
-  docker run --rm \
-  -v "$(pwd)/config":/tmp/docker-mailserver \
-  -ti $DOCKER_IMAGE $@
+_docker_image_exists() {
+  if docker history -q "$1" >/dev/null 2>&1; then
+    return 0
+  else
+    return 1
+  fi
 }
 
+_docker_image() {
+  if ! _docker_image_exists "$IMAGE_NAME"; then
+    echo "Image '$IMAGE_NAME' not found. Pulling ..."
+    docker pull "$IMAGE_NAME"
+  fi
+    docker run \
+      --rm \
+      -v "$(pwd)/config":/tmp/docker-mailserver \
+      -ti "$IMAGE_NAME" $@
+}
+
+_docker_container() {
+  if [ -n "$CONTAINER_NAME" ]; then
+    docker exec -ti "$CONTAINER_NAME" $@
+  else
+    echo "The docker-mailserver is not running!"
+    exit 1
+  fi
+}
+
+while getopts ":c:i:" OPT; do
+  case $OPT in
+    c)
+      CONTAINER_NAME="$OPTARG"
+      ;;
+    i)
+      IMAGE_NAME="$OPTARG"
+      ;;
+   \?)
+     echo "Invalid option: -$OPTARG" >&2
+     ;;
+  esac
+done
+
+shift $((OPTIND-1))
+
 case $1 in
 
   email)
@@ -45,17 +113,15 @@ case $1 in
 
       add)
         shift
-        _docker addmailuser $@
+        _docker_image addmailuser $@
         ;;
       del)
         shift
-        _docker delmailuser $@
+        _docker_image delmailuser $@
         ;;
-
       list)
-        _docker listmailuser	
+        _docker_image listmailuser
         ;;
-
       *)
         _usage
         ;;
@@ -66,13 +132,10 @@ case $1 in
     shift
     case $1 in
       dkim)
-        shift
-        _docker generate-dkim-config
+        _docker_image generate-dkim-config
         ;;
-
       ssl)
-        shift
-        _docker generate-ssl-certificate
+        _docker_image generate-ssl-certificate
         ;;
       *)
         _usage
@@ -84,7 +147,19 @@ case $1 in
     shift
     case $1 in
       fetchmail)
-        _docker debug-fetchmail
+        _docker_image debug-fetchmail
+        ;;
+      show-mail-logs)
+        _docker_container cat /var/log/mail/mail.log
+        ;;
+      inspect)
+        _inspect
+        ;;
+      login)
+        _docker_container /bin/bash
+        ;;
+      *)
+        _usage
         ;;
     esac
     ;;