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fix: #20 Enhance CLI help text formatting and documentation (#21)
# Fix line break preservation in CLI help text with pretty formatting - Closes #20 ## Summary This PR fixes an issue where line breaks in CLI help text and docstrings weren't being preserved when using the `pretty` formatting option. Previously, the parser was stripping empty lines and concatenating description text without maintaining the original formatting, which caused multi-line help messages to appear as single paragraphs. ## Problem When parsing markdown content in the `pretty` module, the code was: - Stripping empty lines from descriptions using `line.strip()` - Only adding non-empty lines to description arrays - Losing the visual structure and readability of multi-line help messages This resulted in CLI documentation that didn't match the intended formatting, making help text harder to read. ## Solution Modified the `parse_markdown_to_tree` function in `src/mkdocs_typer2/pretty.py` to: 1. **Preserve original line content**: Changed from `lines[j].strip()` to `lines[j]` to maintain empty lines 2. **Maintain line breaks**: Keep empty lines in description arrays to preserve paragraph structure 3. **Clean trailing whitespace**: Use `.rstrip()` when joining lines to remove trailing whitespace while keeping leading formatting ## Changes Made - **`src/mkdocs_typer2/pretty.py`**: Updated parsing logic to preserve line breaks in descriptions - **`src/mkdocs_typer2/cli.py`**: Added multi-line help message example for testing - **`tests/test_pretty.py`**: Added test case to verify line break preservation - **`CHANGELOG.md`**: Documented the bug fix ## Testing Added a new test case `test_parse_markdown_with_line_breaks()` that verifies: - Multi-line descriptions are parsed correctly - Line breaks are preserved between description paragraphs - The resulting tree structure maintains the original formatting ## Impact This fix ensures that CLI documentation generated with the `pretty` option maintains the intended formatting and readability of help text, making it easier for users to understand command usage and options. ## Example **Before**: Multi-line help text would appear as a single paragraph **After**: Line breaks are preserved, maintaining the original formatting and readability No breaking changes introduced - this is purely a bug fix that improves the user experience.
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‎CHANGELOG.md‎

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## [unreleased]
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### Fixed
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- Fixed issue where line breaks in help text weren't preserved when using `pretty` formatting option
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- Line breaks in CLI help messages and docstrings are now properly rendered in the generated documentation
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## [0.1.4] - 2025-03-15
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‎coverage.xml‎

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‎src/mkdocs_typer2/cli.py‎

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import typer
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app = typer.Typer(help="A sample CLI")
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app = typer.Typer(help="A sample CLI\n\nThis is a multi-line help message.")
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@app.command()

‎src/mkdocs_typer2/pretty.py‎

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and not lines[j].startswith("**")
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and not lines[j].startswith("```")
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):
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root.description = "\n".join(desc_lines)
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and i > 0
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if line.strip(): # Only add non-empty lines
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# Preserve the original line content, including empty lines for line breaks
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if in_description and desc_lines:
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# Join with newlines to preserve line breaks, then strip trailing whitespace
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current_command.description = "\n".join(desc_lines).rstrip()
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current_command.description = "\n".join(desc_lines)
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# Join with newlines to preserve line breaks, then strip trailing whitespace
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current_command.description = "\n".join(desc_lines).rstrip()
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# End of description section
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current_command.description = "\n".join(desc_lines)
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# Join with newlines to preserve line breaks, then strip trailing whitespace
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current_command.description = "\n".join(desc_lines).rstrip()
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current_command.description = "\n".join(desc_lines).rstrip()
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in_commands_section = True

‎tests/test_pretty.py‎

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def test_tree_to_markdown_no_commands():
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cmd = CommandNode(name="mycli", description="A test CLI", commands=[])
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markdown = tree_to_markdown(cmd)
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assert "*No commands available*" in markdown
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"""Test that commands table shows 'No commands available' when empty."""
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cmd = CommandNode(name="test", commands=[])
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result = tree_to_markdown(cmd)
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assert "*No commands available*" in result
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def test_parse_markdown_with_line_breaks():
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"""Test that line breaks in help text are preserved."""
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markdown = """# mycli
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A test CLI tool
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This is a multi-line help message.
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```console
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$ mycli --help
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```
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**Arguments**:
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* `name`: The name argument [required]
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**Options**:
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* `--verbose`: Enable verbose mode
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"""
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tree = parse_markdown_to_tree(markdown)
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# Check that line breaks are preserved in the description
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assert tree.name == "mycli"
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assert "A test CLI tool" in tree.description
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assert "This is a multi-line help message." in tree.description
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# Verify there's a line break between the two lines
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assert "\n" in tree.description
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assert tree.description.count("\n") >= 1

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