Support dash-separated names in --preserve-case

[jlevy]

Summary

The --preserve-case feature generates case variants for camelCase and underscore_separated names, but does not handle dash-separated (kebab-case) names like my-component or some-value.

Details

There is a TODO at line 688 of repren.py:

# TODO: Could handle dash-separated names as well.

The _split_name() function currently checks for underscores first, then falls back to camelCase splitting. Dash-separated names (common in CSS class names, HTML attributes, CLI flags, file names, and package names) are not recognized — the entire string is treated as one word.

Example

With --preserve-case --from my-component --to new-widget:

Current behavior: Only matches literal my-component → new-widget

Expected behavior: Should also generate:

• my-component → new-widget (kebab-case)
• my_component → new_widget (snake_case)
• myComponent → newWidget (camelCase)
• MyComponent → NewWidget (PascalCase)
• MY_COMPONENT → NEW_WIDGET (SCREAMING_SNAKE)

Suggestion

Extend _split_name() to detect - as a separator, similar to _:

if "_" in name:
    return "_", name.split("_")
elif "-" in name:
    return "-", name.split("-")
else:
    # CamelCase splitting...

Then update all_case_variants() to also generate the dash-separated variant.