(sigil build module-deps)

Extract import declarations from a .sgl source file. Returns a list of library names (each is a list of symbols). Example: ((sigil io) (sigil path) (srfi srfi-9))

Read all s-expressions from a file. Returns #f if file cannot be read.

Extract imports from a list of top-level forms. Looks for (define-library ...) or (library ...) forms.

Extract imports from a define-library form. Handles: (define-library (name) (import ...) (export ...) ...)

Extract library names from import sets. Handles import set modifiers: only, except, prefix, rename

Unwrap import set modifiers to get the base library name. (only (lib name) ...) -> (lib name) (except (lib name) ...) -> (lib name) (prefix (lib name) ...) -> (lib name) (rename (lib name) ...) -> (lib name)

Extract library name from a define-library form. Returns the library name as a list of symbols.

Convert a library name to a relative file path. (sigil io) -> "sigil/io" (srfi srfi-9) -> "srfi/srfi-9"

Resolve a library name to a file path. First searches source-files for .sgl, then lib-paths for .sgb. Returns: (cons 'source path) | (cons 'compiled path) | #f

Find a source file matching the library path. Checks for .sgl extension.

Find a compiled file in lib-paths. Checks each path for <lib-path>/<rel-path>.sgb

Build a dependency graph for source files. Returns an alist of (source-path . (list of dependency paths)) Dependencies can be source paths or compiled paths.

Resolve a list of imports to dependency paths. Filters out external dependencies that can't be resolved.

Topologically sort source files by dependencies. Returns files in order: dependencies before dependents. Only sorts source files; compiled dependencies are not included in output.

Sort source files by their dependencies. Simple wrapper that builds the graph and returns sorted file list. source-files: list of .sgl file paths lib-paths: list of paths to search for compiled dependencies Returns: source files in dependency order (dependencies first)

Filter graph to only include source file dependencies. Removes compiled (.sgb) dependencies.

Kahn's algorithm main loop (module-specific version).

Decrement in-degrees for a list of nodes.

Detect cycles in module dependency graph. Returns list of nodes involved in cycles, or empty list.

Check if a module needs to be recompiled. Returns #t if:

• Output .sgb doesn't exist
• Source .sgl is newer than output .sgb
• Any dependency (source or compiled) is newer than output
• Any source dependency was recompiled this session

Check if any dependency was recompiled this session.

Check if any compiled dependency is newer than output.

Compile modules in dependency order with incremental support. source-files: list of .sgl file paths output-dir: directory for .sgb output files lib-paths: list of paths to search for compiled dependencies glob-base: base directory for computing relative paths (optional) force?: if #t, recompile everything regardless of mtime

Returns: (list compiled-files skipped-files)

Ensure directory exists