feat(markdown): improve markdown parser and diagnostics #5292
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…d fenced code blocks
…robust block handling
…markdown, headers, and lists
…ens and kinds - Rename `DemoSyntaxTreeBuilder` to `MarkdownSyntaxTreeBuilder` in markdown factory - Extend `MarkdownSyntaxKind` with new tokens for tables, lists, blockquotes, and delimiters - Add utility functions in `make.rs` to create various Markdown syntax tokens - Update macro rules to include new token types
- Introduce `markdown` module in configuration crate - Add `MarkdownConfiguration` struct with formatter, linter, and parser options - Extend `Configuration` struct to include optional Markdown configuration - Implement default configuration and configuration builder for Markdown
- Update `LintCommandPayload` to include Markdown linter configuration - Modify CLI session to handle Markdown linter in command processing - Add Markdown linter configuration import and merge logic in command runner
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…kdown block types - Enhance parsing logic for blockquotes, headers, list items, and thematic breaks - Add more robust whitespace and marker handling - Improve continuation line parsing for list items - Implement more precise checkpoint and rewind mechanisms - Add better error recovery and validation for different block types
CodSpeed Performance ReportMerging #5292 will not alter performanceComparing Summary
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ematipico
requested changes
Mar 7, 2025
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ematipico
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ematipico
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Thank you for contribution! I haven't reviewed the logic of the parser because there are other important things to change. Briefly:
- revert snapshots that caused regressions
- remove files that cause exptions
- do not expose any configuration to our users yet
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I am a bit conflicted about accepting the parsing of headers because there was another contributor who was working on it before you: #5208
I wish you could have engaged with us before jumping straight to developments. Let's see how it goes, since this PR needs some reviews.
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| // For now, update snapshots automatically | ||
| insta::with_settings!({ | ||
| prepend_module_to_snapshot => false, | ||
| snapshot_path => &test_directory, | ||
| // Auto-accept new snapshots during development | ||
| input_file => test_case_path.to_string_lossy().to_string(), |
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Please, let's avoid this. It's easier to accept a snapshot with another CLI command than figuring out why a snapshot was updated, because we might forget to update this code.
crates/biome_markdown_parser/tests/md_test_suite/ok/thematic_break_block.md.snap
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crates/biome_markdown_parser/tests/md_test_suite/ok/thematic_break_block.md.snap
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crates/biome_markdown_parser/tests/md_test_suite/err/invalid_header.md.snap
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…figuration imports - Delete markdown parser test files including `parser_test.rs` and `spec_test.rs` - Remove unused Markdown configuration import from CLI commands module - Update spec test to use more robust debugging and tree structure printing - Remove test files for invalid markdown headers
…t validation - Add direct support for thematic break literal tokens - Enhance thematic break block parsing to handle whitespace and marker variations - Implement stricter validation to prevent invalid thematic break content - Add comments to clarify thematic break detection logic
…ine handling - Refactor blockquote parsing to handle nested blockquotes and continuation lines - Improve line parsing logic to support more complex blockquote structures - Simplify content node creation and add more robust parsing mechanism - Enhance end-of-blockquote detection with better line and EOF handling
…ed logic - Simplify header block parsing by removing redundant diagnostic creation - Enhance whitespace handling with a more concise consumption method - Remove explicit text node creation for header content - Improve header validation and parsing robustness
…rkers and thematic breaks - Enhance lexer to handle list markers for stars, minus, digits, and underscores - Implement more robust thematic break detection with flexible marker parsing - Separate parsing logic for different marker types to improve code clarity - Add support for various list marker formats and whitespace handling
- Simplify document parsing by removing unnecessary checks and improving block handling - Introduce a checkpoint mechanism for better fallback to paragraph parsing - Streamline block element recognition and improve error handling for unrecognized tokens - Add support for '+' as a list marker and enhance overall lexer functionality - Update tests to allow for development diagnostics and improve tree structure printing
… function names and logic - Rename functions for clarity: `at_header_block` to `at_atx_header` and `parse_header_block` to `parse_atx_header` - Improve header validation by ensuring whitespace follows hash symbols - Streamline content parsing logic for ATX headers, including handling of trailing hashes - Add a new function `at_setext_header` for future Setext header support
…alidation and diagnostics - Introduce detailed logging for whitespace and marker checks in unordered and ordered list parsing - Refactor list item parsing functions to include parent indentation tracking - Improve whitespace handling after list markers and ensure valid content parsing - Streamline continuation line handling for list items and enhance overall structure
- Consolidate paragraph parsing by removing redundant checks and simplifying inline element handling - Introduce a checkpoint mechanism to improve content validation and error handling - Enhance whitespace management and ensure proper handling of leading spaces and newlines - Create a more efficient structure for paragraph item list creation and completion
…aders, lists, and thematic breaks
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Closing this as I no longer have the time availability. |
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Summary
I've made some needed improvements to the Markdown parser's structure and error reporting. The main issues I tackled were:
Before these changes, the parser couldn't properly report when someone wrote "#Header" instead of "# Header". Now it catches these errors with the right position info and a clear message. The new structure should also make it easier for others to work on the parser going forward.
Test Plan
The implementation correctness is demonstrated by:
✅ Tests passing
✅ Invalid header reporting diagnostics
✅ Some manual testing
To verify:
cargo test -p biome_markdown_parserto confirm all tests passinvalid_header.mdtest properly emits the diagnostic "Invalid header format: missing space after '#'"