upgraded pdm-shell to also run arbitrary shell commands

bin/pdm-shell

@@ -1,10 +1,16 @@
 #!/bin/bash
 
 if [[ -z $1 || $1 == "-h" || $1 == "--help" ]]; then
-        echo "Usage: $(basename $0) container
+        echo "Usage: $(basename $0) container [command]
 
-Start a shell on the given container, and connect to it."
+Runs a bash shell on the given container. If second argument is
+omitted, an interactive login shell is launched. If second argument
+is given, the string is interpreted as a command and executed."
         exit 1
 fi
 
-podman exec -it $1 bash
+if [[ -z $2 ]]; then
+        podman exec -it $1 bash -l
+else
+        podman exec -it $1 bash -c "$2"
+fi