don't require a config file for 'preflight' and 'init'

tzk/__main__.py

@@ -60,6 +60,8 @@ class CommitCommand(CliCommand):
         )
 
     def execute(self, args: argparse.Namespace) -> None:
+        cm().require_config()
+        chdir_to_wiki()
         if cm().commit_require_branch:
             current_branch = git.read("rev-parse", "--abbrev-ref", "HEAD")
             if current_branch != cm().commit_require_branch:
@@ -99,6 +101,8 @@ class ListenCommand(CliCommand):
         )
     
     def execute(self, args: argparse.Namespace) -> None:
+        cm().require_config()
+        chdir_to_wiki()
         try:
             tw.exec(
                 [
@@ -198,6 +202,8 @@ class BuildCommand(CliCommand):
                  f"in your config file.")
 
     def execute(self, args: argparse.Namespace) -> None:
+        cm().require_config()
+        chdir_to_wiki()
         self._precheck(args.product)
 
         # Find the build steps for the product the user specified.
@@ -244,24 +250,10 @@ class BuildCommand(CliCommand):
         print(f"tzk: Build of product '{args.product}' completed successfully.")
 
 
-def launch():
-    parser = argparse.ArgumentParser()
-
-    subparsers = parser.add_subparsers()
-    for command in sorted(CliCommand.__subclasses__(), key=lambda i: i.__name__):
-        subparser = subparsers.add_parser(command.cmd, help=command.help)
-        subparser.set_defaults(_cls=command)
-        command.setup_arguments(subparser)  # type: ignore
-
-    args = parser.parse_args()
-    if not hasattr(args, '_cls'):
-        # no subcommand was given
-        parser.print_help()
-        sys.exit(0)
-
-    # For all operations except 'init', we start in the wiki folder.
-    # (For init, we're actually *creating* the wiki folder.)
-    if not args._cls.cmd == "init":
+def chdir_to_wiki():
+    """
+    For most operations, we want the current directory to be the wiki folder.
+    """
     if not cm().wiki_folder:
         fail("No 'wiki_folder' option found in config. Set this option to the name "
             "of the wiki subfolder within the current directory.")
@@ -278,6 +270,22 @@ def launch():
             f"Please check that your wiki is initialized "
             f"and you specified the correct wiki_folder_name.")
 
+
+def launch():
+    parser = argparse.ArgumentParser()
+
+    subparsers = parser.add_subparsers()
+    for command in sorted(CliCommand.__subclasses__(), key=lambda i: i.__name__):
+        subparser = subparsers.add_parser(command.cmd, help=command.help)
+        subparser.set_defaults(_cls=command)
+        command.setup_arguments(subparser)  # type: ignore
+
+    args = parser.parse_args()
+    if not hasattr(args, '_cls'):
+        # no subcommand was given
+        parser.print_help()
+        sys.exit(0)
+
     args._cls().execute(args)
 
 

tzk/config.py

@@ -26,14 +26,27 @@ class ConfigurationManager:
                     del sys.path[0:1]
                     break
         else:
-            fail(
-                f"Your TZK config file could not be found. "
-                f"Please ensure there is a file called tzk_config.py "
-                f"in the current directory.")
+            # no config file
+            self.conf_mod = None
 
     def __getattr__(self, attr):
+        if self.conf_mod is None:
+            return None
+        else:
             return getattr(self.conf_mod, attr, None)
 
+    def has_config(self) -> bool:
+        return self.conf_mod is not None
+
+    def require_config(self) -> None:
+        """
+        Quit with exit status 1 if no config file was found.
+        """
+        if not self.has_config():
+            fail(f"No tzk_config.py found in the current directory. "
+                 f"(Try 'tzk init' if you want to create a new one.)")
+
+    #TODO: trash this function
     def write_attr(self, attr: str, value: str) -> bool:
         """
         Try to add a simple attribute = string value config parameter to the

tzk/tw.py

@@ -166,7 +166,7 @@ def install(wiki_name: str, tw_version_spec: str, author: Optional[str]):
 
     _init_npm(wiki_name, tw_version_spec, author)
     _init_tw(wiki_name)
-    warnings |= not _save_wikifolder_to_config(wiki_name)
+    #warnings |= not _save_wikifolder_to_config(wiki_name)  ## TODO: now write entire config
     _add_filesystem_plugins(wiki_name)
     _init_gitignore()
     _initial_commit()