sh.zio.pod-systemd: update file

usr/local/bin/sh.zio.pod-systemd

@@ -1,36 +1,57 @@
 #!/usr/bin/env bash
 
-if [[ "$(realpath "$(dirname "$(realpath -s "$0")")/../../../")" == "/" ]]; then
+if [[ "$(realpath "$(dirname "$(realpath "$0")")/../../../")" == "/" ]]; then
     . /usr/local/libexec/zio/helpers/bash.sh
 else
-    . "$(dirname "$(realpath -s "$0")")/../libexec/zio/helpers/bash.sh"
+    . "$(dirname "$(realpath "$0")")/../libexec/zio/helpers/bash.sh"
 fi
 
 test_prog "podlet"
 test_prog "podman"
 
 service_name="$1"
-command_args="${@:2}"
+command_args=("${@:2}")
 
-if [[ -z $service_name ]]; then
+if [[ -z "$service_name" ]]; then
     say warning "No service name given, exiting"
-    exit
+    exit 1
+fi
+if [[ ${#command_args[@]} -eq 0 ]]; then
+    say warning "No command args given, exiting"
+    exit 1
 fi
 
-if [[ -z $command_args ]]; then
-    say warning "No command args given, exiting"
-    exit
+# Force the container name to service_name: overwrite any --name passed in the
+# podman arguments, or inject one if absent. This keeps the systemd unit name
+# (which podlet derives from the container name) always equal to service_name.
+has_name=false
+for ((i = 0; i < ${#command_args[@]}; i++)); do
+    case "${command_args[i]}" in
+        --name)
+            command_args[i+1]="$service_name"
+            has_name=true
+            break
+            ;;
+        --name=*)
+            command_args[i]="--name=$service_name"
+            has_name=true
+            break
+            ;;
+    esac
+done
+if [[ "$has_name" == false ]]; then
+    command_args=(--name "$service_name" "${command_args[@]}")
 fi
 
 say info "Creating systemd service for $service_name"
+podlet -u -i --overwrite -d "$service_name container" podman run "${command_args[@]}"
 
-podlet -u -i -d \"$service_name container\" podman run $command_args
-if [[ $(id -u) = 0 ]]; then
+if [[ $(id -u) -eq 0 ]]; then
     systemctl daemon-reload
-    systemctl start $service_name
+    systemctl start "$service_name"
     say primary "System service file for $service_name created and started"
 else
     systemctl --user daemon-reload
-    systemctl --user start $service_name
+    systemctl --user start "$service_name"
     say primary "User service file for $service_name created and started"
-fi
+fi