feat: add SystemVerilog/Verilog, Tcl, and VHDL language support - #1508
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3brahimi wants to merge 3 commits into
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feat: add SystemVerilog/Verilog, Tcl, and VHDL language support#15083brahimi wants to merge 3 commits into
3brahimi wants to merge 3 commits into
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Adds three new language extractors for HDL codebases, each backed by
a vendored tree-sitter WASM grammar:
- SystemVerilog / Verilog (.sv, .svh, .v)
Modules, interfaces, packages, classes, programs, checkers, UDP
declarations as class nodes; functions/tasks; typedef, struct/union,
enum names; net/data/parameter/port declarations as fields; module
instantiation call edges; package import and `include import edges.
Grammar: tree-sitter/tree-sitter-verilog (MIT), ABI 14.
- Tcl (.tcl)
Procedures and namespaces as functions/classes; set variable
assignments; source file.tcl as import edges; all other commands as
call edges.
Grammar: tree-sitter-grammars/tree-sitter-tcl (MIT), ABI 14.
- VHDL (.vhd, .vhdl)
Entities, architectures, packages, components as class nodes;
functions/procedures; records, enumerations, subtypes; signal/
variable/constant declarations; use clause imports; call edges.
Grammar: alemuller/tree-sitter-vhdl (MIT), ABI 14.
The three WASM files are vendored under src/extraction/wasm/ (same
pattern as existing vendored grammars for arkts, nix, terraform, etc.)
and added to VENDORED_WASM_LANGS. Attribution added to the WASM block
comment in grammars.ts. README Supported Languages table updated.
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Pull request overview
Adds new Tree-sitter (WASM) backed language support for HDL-oriented repositories (SystemVerilog/Verilog, VHDL) plus Tcl, wiring them into CodeGraph’s language detection and extractor registry and documenting the new coverage.
Changes:
- Added
verilog,tcl, andvhdlto the supported language IDs and to the extractor registry. - Vendored and registered three new WASM grammars and mapped common file extensions to the new languages.
- Added new per-language extractor configs and updated README “Supported Languages”.
Reviewed changes
Copilot reviewed 7 out of 10 changed files in this pull request and generated 7 comments.
Show a summary per file
| File | Description |
|---|---|
| src/types.ts | Adds new language IDs to the LANGUAGES list. |
| src/extraction/languages/vhdl.ts | New VHDL extractor configuration. |
| src/extraction/languages/verilog.ts | New SystemVerilog/Verilog extractor configuration. |
| src/extraction/languages/tcl.ts | New Tcl extractor configuration. |
| src/extraction/languages/index.ts | Registers new extractors in EXTRACTORS. |
| src/extraction/grammars.ts | Registers new WASM grammar files, extension mappings, and display names; adds vendored attribution notes. |
| README.md | Documents the newly supported languages and their extraction coverage. |
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Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
3brahimi
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The code is reviewed, fixes has been applied and is ready to merge.
The autofix commit (be6bfa1) correctly diagnosed two real bugs — importTypes: [] made extractImport dead code for 'source' detection (else-if dispatch never reaches it), and variableTypes: ['set'] silently skipped visiting a set statement's children, dropping call edges for command substitutions like set x [foo]. Both are properly fixed by the new visitNode hook. But the patch left the old extractImport method body orphaned after visitNode's closing brace with no wrapping method signature — 17 syntax errors, doesn't compile. Removed the dead lines; visitNode already covers everything they did. Verified: source now creates an import edge, and set result [helper foo] now creates a call edge to helper — both broken before this fix, both work now.
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Adds three new language extractors for HDL codebases, each backed by a vendored tree-sitter WASM grammar:
SystemVerilog / Verilog (.sv, .svh, .v) Modules, interfaces, packages, classes, programs, checkers, UDP declarations as class nodes; functions/tasks; typedef, struct/union, enum names; net/data/parameter/port declarations as fields; module instantiation call edges; package import and `include import edges. Grammar: tree-sitter/tree-sitter-verilog (MIT), ABI 14.
Tcl (.tcl) Procedures and namespaces as functions/classes; set variable assignments; source file.tcl as import edges; all other commands as call edges. Grammar: tree-sitter-grammars/tree-sitter-tcl (MIT), ABI 14.
VHDL (.vhd, .vhdl) Entities, architectures, packages, components as class nodes; functions/procedures; records, enumerations, subtypes; signal/ variable/constant declarations; use clause imports; call edges. Grammar: alemuller/tree-sitter-vhdl (MIT), ABI 14.
The three WASM files are vendored under src/extraction/wasm/ (same pattern as existing vendored grammars for arkts, nix, terraform, etc.) and added to VENDORED_WASM_LANGS. Attribution added to the WASM block comment in grammars.ts. README Supported Languages table updated.