Fix AAP-37599

ansible-runner will ignore adding the mountpoint to the '-v` argument list if
the source path does not exist. Instead it should respect whatever the
user is passing to the '--container-volume-mount' option. The exception would
be if the user tried to pass a file as the source path; ansible-runner should
resolve the file's parent directory.

src/ansible_runner/config/_base.py

@@ -397,13 +397,15 @@ def _update_volume_mount_paths(self,
                                    dst_mount_path: str | None = None,
                                    labels: str | None = None
                                    ) -> None:
+        # ensure source is abs
+        src_path = os.path.abspath(os.path.expanduser(os.path.expandvars(src_mount_path)))
 
         if src_mount_path is None or not os.path.exists(src_mount_path):
-            logger.debug("Source volume mount path does not exist: %s", src_mount_path)
-            return
+            debug(f"Source volume mount path does not exist: {src_mount_path}")
 
-        # ensure source is abs
-        src_path = os.path.abspath(os.path.expanduser(os.path.expandvars(src_mount_path)))
+        if os.path.isfile(src_path):
+            debug(f"Source volume mount path '{src_path}' is a file, will resolve to parent directory: {os.path.dirname(src_path)}")
+            src_path = os.path.dirname(src_path)
 
         # set dest src (if None) relative to workdir(not absolute) or provided
         if dst_mount_path is None:
@@ -417,19 +419,14 @@ def _update_volume_mount_paths(self,
         else:
             dst_path = os.path.abspath(os.path.expanduser(os.path.expandvars(dst_mount_path)))
 
-        # ensure each is a directory not file, use src for dest
-        # because dest doesn't exist locally
-        src_dir = src_path if os.path.isdir(src_path) else os.path.dirname(src_path)
-        dst_dir = dst_path if os.path.isdir(src_path) else os.path.dirname(dst_path)
-
-        # always ensure a trailing slash
-        src_dir = os.path.join(src_dir, "")
-        dst_dir = os.path.join(dst_dir, "")
-
         # ensure the src and dest are safe mount points
         # after stripping off the file and resolving
-        self._ensure_path_safe_to_mount(src_dir)
-        self._ensure_path_safe_to_mount(dst_dir)
+        self._ensure_path_safe_to_mount(src_path)
+        self._ensure_path_safe_to_mount(dst_path)
+
+        # ensure that paths have a trailing slash
+        src_dir = os.path.join(src_path, "")
+        dst_dir = os.path.join(dst_path, "")
 
         # format the src dest str
         volume_mount_path = f"{src_dir}:{dst_dir}"