Add ability to specify custom volumes. If these volumes are under the user's $HOME they are created before the container, to ensure they have the correct ownership.

otherworld

@@ -24,13 +24,12 @@ def create_x11_mapping ():
             "-v", f"{home}/.guix-profile/share/fonts/truetype:/user/share/fonts/truetype-guix",
             "-v", f"{home}/.guix-profile/share/fonts/opentype:/usr/share/fonts/opentype-guix",
             "-v", f"{Xauthority}:{inner_user}/.Xauthority",
-            "-v", f"{home}/otherworld:{inner_user}/otherworld",
             "-w", inner_user,
             "--shm-size", "2g",
             "--privileged"]
 
 DOCKER_CREATE_OPTIONS = ["-t"] + create_x11_mapping()
-
+USER_VOLUMES = ["~/otherworld"]
 BACKGROUND_COMMAND = None
 DEFAULT_COMMAND = ["bash"]
 
@@ -59,12 +58,36 @@ def docker_exec (container, command, user):
 def docker_rm (container):
     call(["docker", "rm", "-f", container])
 
+def expand_user_volumes (volumes):
+    outer_home = os.environ["HOME"]
+    inner_home = outer_home
+    mappings = []
+    for volume in volumes:
+        source = volume
+        target = volume
+        if ":" in source:
+            (source, target) = source.split(":")
+        
+        if source.startswith("~/"):
+            source = f"{outer_home}/{source[1:]}"
+
+        if source.startswith(outer_home) and not os.path.exists(source):
+            os.makedirs(source)
+
+        if target.startswith("~/"):
+            target = f"{inner_home}/{target[1:]}"
+
+        mappings = mappings + ["-v", f"{source}:{target}"]
+
+    return mappings
+
 user = os.environ["USER"]
 image_name = os.environ.get("OW_IMAGE", IMAGE_NAME)
 container_name = os.environ.get("OW_CONTAINER", f"{CONTAINER_NAME}_{user}")
 
 command = sys.argv[1:]
 command_user = user
+user_volumes = USER_VOLUMES
 
 quiet = False
 while len(command) > 0:
@@ -86,6 +109,9 @@ while len(command) > 0:
     elif arg.startswith("--image="):
         image_name = arg[len("--image="):]
         command = command[1:]
+    elif arg.startswith("--volume="):
+        user_volumes.append(arg[len("--volume="):])
+        command = command[1:]
     else:
         break
 
@@ -101,7 +127,7 @@ except Exception:
     docker_create(
         image_name,
         container_name,
-        DOCKER_CREATE_OPTIONS,
+        DOCKER_CREATE_OPTIONS + expand_user_volumes(user_volumes),
         BACKGROUND_COMMAND
     )
     container = docker_inspect(container_name)[0]