add development doc

doc/DEVELOPMENT.org

@@ -0,0 +1,8 @@
+* IDE setup: make sure my.config is in your package search path
+In runtime, ~my.config~ is imported from the user config directory dynamically.
+
+However, Pycharm/Emacs/whatever you use won't be able to figure that out, so you'd need to adjust your IDE configuration.
+
+- Pycharm: basically, follow the instruction [[https://stackoverflow.com/a/55278260/706389][here]]
+
+  i.e. create a new interpreter configuration (e.g. name it "Python 3.7 (for HPI)"), and add =~/.config/my=.

my/init.py

@@ -19,6 +19,8 @@ def setup_config():
     cfg_dir = Path('~/.config').expanduser()
     mycfg_dir = cfg_dir / 'my'
 
+    # TODO maybe try importing first and if it's present, don't do anything?
+
     if not mycfg_dir.exists():
         warnings.warn(f"my.config package isn't found! (expected at {mycfg_dir}). This might result in issues.")
         from . import mycfg_stub as mycfg
@@ -27,7 +29,6 @@ def setup_config():
         mp = str(mycfg_dir)
         if mp not in sys.path:
             sys.path.insert(0, mp)
-        print("UPDATED PATH") # TODO FIXME remove
 
     try:
         import my.config