Add dev notes for codegen script; drop uvx from hatch run command

Author: rlskoeser

DEVELOPER_NOTES.md

@@ -88,4 +88,19 @@ pip install -e ".[docs]"
 sphinx-build docs docs/_build
 ```
 
-HTML documentation will be generated in `docs/_build/html`
+HTML documentation will be generated in `docs/_build/html`
+
+
+### Regenerating multilingual Gregorian month name parse file
+
+The Gregorian Lark parser includes a script-generated file, which
+populates month names based on a list of language codes using the Babel
+library.  To regenerate, run the script with hatch (which should
+be installed globally)::
+
+    hatch run codegen:generate
+    
+When the `.lark` file is modified by the script, it must be committed to git.
+
+
+

scripts/generate_gregorian_grammar.py

@@ -1,4 +1,14 @@
 #!/usr/bin/env python
+"""
+This script generates the gregorian_multilang.lark file
+with month names (full and abbreviated) based on the list of
+target languages.
+
+Run this script with hatch to regeneate the file::
+
+    hatch run codegen:generate
+
+"""
 
 from collections import defaultdict
 import pathlib
@@ -25,7 +35,7 @@
 
 # warning to include at top of generated file
 warning_text = """// WARNING: This file is auto-generated. DO NOT EDIT.
-// To regenerate: uvx hatch run codegen:generate
+// To regenerate: hatch run codegen:generate
 
 """
 

src/undate/converters/grammars/gregorian_multilang.lark

@@ -1,5 +1,5 @@
 // WARNING: This file is auto-generated. DO NOT EDIT.
-// To regenerate: uvx hatch run codegen:generate
+// To regenerate: hatch run codegen:generate
 
 month_1: "January" | "Jan" | "enero" | "ene" | "janvier" | "janv" | "Januar" | "Mutarama" | "mut" | "Janwaliyo" | "ጥሪ"
 month_2: "February" | "Feb" | "febrero" | "feb" | "février" | "févr" | "Februar" | "Gashyantare" | "gas" | "Febwaliyo" | "ለካቲት" | "ለካ"