Crate fallow_extract 

Parsing and extraction engine for fallow codebase intelligence.

This crate handles all file parsing: JS/TS via Oxc, Vue/Svelte SFC extraction, Astro frontmatter, MDX import/export extraction, CSS Module class name extraction, HTML asset reference extraction, and incremental caching of parse results.

Re-exports

pub use astro::extract_astro_frontmatter;

pub use css::ThemeScan;

pub use css::ThemeTokenDef;

pub use css::extract_apply_tokens;

pub use css::extract_css_module_exports;

pub use css::scan_theme_blocks;

pub use css_classes::MarkupClassScan;

pub use css_classes::MarkupClassToken;

pub use css_classes::is_edit_distance_one;

pub use css_classes::is_typo_edit;

pub use css_classes::scan_markup_class_tokens;

pub use css_metrics::compute_css_analytics;

pub use glimmer::is_glimmer_file;

pub use glimmer::strip_glimmer_templates;

pub use mdx::extract_mdx_statements;

pub use sfc::extract_sfc_scripts;

pub use sfc::extract_sfc_styles;

pub use sfc::is_sfc_file;

pub use sfc_css::scoped_unused_classes;

pub use sfc_css::sfc_virtual_stylesheet;

pub use tailwind::TailwindArbitraryUse;

pub use tailwind::scan_tailwind_arbitrary_values;

Modules

astro

Astro component frontmatter extraction.

cache

Incremental parse cache with bitcode serialization.

css

CSS/SCSS file parsing and CSS Module class name extraction.

css_classes

Markup CSS-class reference scanning and class-name similarity.

css_metrics

Structural CSS analytics computed from the parsed CSS syntax tree.

flags

Feature flag detection via lightweight Oxc AST visitor.

glimmer

Helpers for Glimmer component files (.gts / .gjs).

graphql

GraphQL document parsing.

html

HTML file parsing for script, stylesheet, and Angular template references.

iconify

Static Iconify icon-string extraction (issue #608).

inventory

Function inventory walker for fallow coverage upload-inventory.

mdx

MDX import/export statement extraction.

sfc

Vue/Svelte Single File Component (SFC) script and style extraction.

sfc_css

Dead scoped-CSS class detection for Vue/Svelte single-file components.

suppress

Inline suppression comment parsing.

tailwind

Tailwind CSS arbitrary-value detection. Tailwind CSS arbitrary-value detection.

visitor

Visitor utilities for AST extraction.

Structs

ClassHeritageInfo

Additional heritage metadata for an exported class.

DynamicImportInfo

A dynamic import() call.

DynamicImportPattern

A dynamic import with a partially resolved pattern.

ExportInfo

An export declaration.

ImportInfo

An import declaration.

LocalTypeDeclaration

A module-scope declaration that can be used as a TypeScript type.

MemberAccess

A static member access expression (e.g., Status.Active, MyClass.create()).

MemberInfo

A member of an enum, class, or namespace.

ModuleInfo

Extracted module information from a single file.

ParseResult

Result of parsing all files, including incremental cache statistics.

PublicSignatureTypeReference

A reference from an exported symbol’s public signature to a type name.

ReExportInfo

A re-export declaration.

RequireCallInfo

A require() call.

Enums

ExportName

Export identifier.

ImportedName

How a symbol is imported.

MemberKind

The kind of member.

VisibilityTag

Visibility tag from JSDoc/TSDoc comments that suppresses unused-export detection.

Constants

ANGULAR_THIS_SPREAD_SENTINEL

Sentinel object for a MemberAccess recorded when a class body spreads this into an object literal ({ ...this }, the Angular “headless pattern” convention that forwards every signal input/output into a behavior pattern). The unused-component-input / unused-component-output detectors treat its presence as a whole-component abstain, since every member is consumed opaquely through the spread.

ANGULAR_TPL_SENTINEL

Sentinel value used as the object field in MemberAccess entries produced by the Angular template scanner. The analysis phase checks imports for entries with this sentinel and merges them into the component’s self_accessed_members set.

FACTORY_CALL_SENTINEL

Synthetic member-access object prefix for static-factory call returns.

FLUENT_CHAIN_NEW_SENTINEL

Synthetic member-access object prefix for fluent chains rooted at a new expression.

FLUENT_CHAIN_SENTINEL

Synthetic member-access object prefix for fluent-builder chain credit.

INSTANCE_EXPORT_SENTINEL

Synthetic member-access object used to carry exported-instance bindings.

PLAYWRIGHT_FIXTURE_ALIAS_SENTINEL

Synthetic member-access object prefix for Playwright fixture wrapper aliases.

PLAYWRIGHT_FIXTURE_DEF_SENTINEL

Synthetic member-access object prefix for typed Playwright fixtures.

PLAYWRIGHT_FIXTURE_TYPE_SENTINEL

Synthetic member-access object prefix for exported Playwright fixture type aliases.

PLAYWRIGHT_FIXTURE_USE_SENTINEL

Synthetic member-access object prefix for Playwright fixture member uses.

Functions

compute_line_offsets

Compute a table of line-start byte offsets from source text.

parse_all_files

Parse all files in parallel, extracting imports and exports. Uses the cache to skip reparsing files whose content hasn’t changed.

parse_from_content

Parse from in-memory content (for LSP, includes complexity).

parse_single_file

Parse a single file and extract module information (without complexity).

parse_source_to_module

Parse source text into a ModuleInfo.