create directory hierarchy for plist file if not present. fixes #6

Author: infothrill

CHANGELOG.rst

@@ -1,6 +1,10 @@
 Release history
 ---------------
 
+0.x.x (TBD)
+++++++++++++++++++
+- changed: create directory hierarchy for plist file if not present. issue #6
+
 0.2.0 (March 2021)
 ++++++++++++++++++
 - drop python 2.x, 3.2, 3.3 support

launchd/plist.py

@@ -18,8 +18,12 @@
 }
 
 
+def compute_directory(scope):
+    return os.path.expanduser(PLIST_LOCATIONS[scope])
+
+
 def compute_filename(label, scope):
-    return os.path.expanduser(os.path.join(PLIST_LOCATIONS[scope], label + ".plist"))
+    return os.path.join(compute_directory(scope), label + ".plist")
 
 
 def discover_filename(label, scopes=None):
@@ -51,10 +55,12 @@ def write(label, plist, scope=USER):
     Writes the given property list to the appropriate file on disk and returns
     the absolute filename.
 
+    Creates the underlying parent directory structure if missing.
     :param plist: dict
     :param label: string
     :param scope: oneOf(USER, USER_ADMIN, DAEMON_ADMIN, USER_OS, DAEMON_OS)
     '''
+    os.makedirs(compute_directory(scope), mode=0o755, exist_ok=True)
     fname = compute_filename(label, scope)
     with open(fname, "wb") as f:
         plistlib.dump(plist, f)