lcitool container: Add "shell" subcommand

Adds "shell" subcommand to the container command.
It is run with:
    lcitool container shell --help

The subcommand works standalone, but also accepts --script
and --workload-dir options.

Signed-off-by: Abdulwasiu Apalowo <abdulwasiuapalowo@gmail.com>

2 files changed, 16 insertions, 6 deletions

diff --git a/lcitool/application.py b/lcitool/application.py
index a435a59..b840658 100644
--- a/lcitool/application.py
+++ b/lcitool/application.py
@@ -398,12 +398,15 @@ class Application:
                 raise ApplicationError(f"'{workload_dir}' is not a directory")
             params["datadir"] = workload_dir.resolve()
 
-        script = Path(args.script)
-        if not script.is_file():
-            raise ApplicationError(f"'{script}' is not a file")
-        params["script"] = script.resolve()
-
-        params["container_cmd"] = "./script"
+        if args.script:
+            script = Path(args.script)
+            if not script.is_file():
+                raise ApplicationError(f"'{script}' is not a file")
+            params["script"] = script.resolve()
+
+        params["container_cmd"] = "/bin/sh"
+        if args.container == "run":
+            params["container_cmd"] = "./script"
 
         try:
             client.run(**params)
diff --git a/lcitool/commandline.py b/lcitool/commandline.py
index 8835b4c..f03aaeb 100644
--- a/lcitool/commandline.py
+++ b/lcitool/commandline.py
@@ -313,6 +313,13 @@ class CommandLine:
         )
         run_containerparser.set_defaults(func=Application._action_container_run)
 
+        shell_containerparser = containersubparser.add_parser(
+            "shell",
+            help="Access to an interactive shell",
+            parents=[imageopt, containeropt, engineopt, workload_diropt, scriptopt]
+        )
+        shell_containerparser.set_defaults(func=Application._action_container_run)
+
     # Validate "container" args
     def _validate(self, args):
         """