Add SCSS and Less support

packages/rbtr/pyproject.toml

@@ -40,11 +40,13 @@ dependencies = [
   "tree-sitter-java",
   "tree-sitter-javascript",
   "tree-sitter-json",
+  "tree-sitter-less",
   "tree-sitter-markdown",
   "tree-sitter-python",
   "tree-sitter-rst",
   "tree-sitter-ruby",
   "tree-sitter-rust",
+  "tree-sitter-scss",
   "tree-sitter-sql",
   "tree-sitter-toml",
   "tree-sitter-typescript",

packages/rbtr/src/rbtr/languages/__init__.py

@@ -52,11 +52,13 @@
 from rbtr.languages.java import JavaPlugin
 from rbtr.languages.javascript import JavaScriptPlugin
 from rbtr.languages.json import JsonPlugin
+from rbtr.languages.less import LessPlugin
 from rbtr.languages.markdown import MarkdownPlugin
 from rbtr.languages.python import PythonPlugin
 from rbtr.languages.rst import RstPlugin
 from rbtr.languages.ruby import RubyPlugin
 from rbtr.languages.rust import RustPlugin
+from rbtr.languages.scss import ScssPlugin
 from rbtr.languages.sql import SqlPlugin
 from rbtr.languages.toml import TomlPlugin
 from rbtr.languages.yaml import YamlPlugin
@@ -112,13 +114,15 @@ def _register_builtins(self) -> None:
             HclPlugin,
             HtmlPlugin,
             JavaPlugin,
+            LessPlugin,
             JavaScriptPlugin,
             JsonPlugin,
             MarkdownPlugin,
             PythonPlugin,
             RstPlugin,
             RubyPlugin,
             RustPlugin,
+            ScssPlugin,
             SqlPlugin,
             TomlPlugin,
             YamlPlugin,

packages/rbtr/src/rbtr/languages/less.py

@@ -0,0 +1,68 @@
+"""Less language plugin.
+
+Extends CSS extraction with the Less preprocessor constructs,
+via a tree-sitter query. Rule sets and `@media`/`@charset`/
+`@keyframes` are captured as doc sections; `@`-prefixed
+declarations as variables; `.mixin()` definitions as functions;
+`@import` as imports for cross-file edges. Mixin *calls*
+(`mixin_statement`) are references, not definitions, and are
+skipped.
+
+Extracted chunks::
+
+    @primary: #333;              → variable "@primary"
+    .rounded(@r) { ... }         → function "rounded"
+    .btn { ... }                 → doc_section ".btn"
+    @keyframes slide { ... }     → doc_section "slide"
+    @import "reset";             → import, metadata {module: "reset"}
+"""
+
+from __future__ import annotations
+
+from rbtr.languages.css import css_nesting_scope
+from rbtr.languages.hookspec import (
+    LanguageRegistration,
+    build_quoted_import,
+    hookimpl,
+)
+
+_QUERY = r"""
+(declaration
+  (property_name) @_var_name
+  (#match? @_var_name "^[@]")) @variable
+
+(mixin_definition
+  (class_name) @_fn_name) @function
+
+(rule_set
+  (selectors) @_section_name) @doc_section
+
+(media_statement) @doc_section
+
+(charset_statement) @doc_section
+
+(keyframes_statement
+  (keyframes_name) @_section_name) @doc_section
+
+(import_statement
+  (string_value) @_import_module) @import
+"""
+
+
+class LessPlugin:
+    """Less language support — Less constructs + @import edges."""
+
+    @hookimpl
+    def rbtr_register_languages(self) -> list[LanguageRegistration]:
+        return [
+            LanguageRegistration(
+                id="less",
+                extensions=frozenset({".less"}),
+                grammar_module="tree_sitter_less",
+                query=_QUERY,
+                scope_extractor=css_nesting_scope,
+                import_extractor=build_quoted_import,
+                import_targets=frozenset({"css", "scss", "less"}),
+                language_plugin_version=1,
+            ),
+        ]

packages/rbtr/src/rbtr/languages/scss.py

@@ -0,0 +1,78 @@
+"""SCSS / Sass language plugin.
+
+Extends CSS extraction with the Sass preprocessor constructs,
+via a tree-sitter query. Rule sets (incl. `%placeholder`
+selectors), `@media`/`@charset`/`@keyframes` are captured as
+doc sections; `$`-prefixed declarations as variables; `@mixin`
+and `@function` definitions as functions; `@use`/`@forward`/
+`@import` as imports for cross-file edges.
+
+Extracted chunks::
+
+    $primary: #333;              → variable "$primary"
+    @mixin flex($dir) { ... }    → function "flex"
+    @function rem($px) { ... }   → function "rem"
+    %card { ... }                → doc_section "%card"
+    .btn { ... }                 → doc_section ".btn"
+    @keyframes slide { ... }     → doc_section "slide"
+    @use "config";               → import, metadata {module: "config"}
+"""
+
+from __future__ import annotations
+
+from rbtr.languages.css import css_nesting_scope
+from rbtr.languages.hookspec import (
+    LanguageRegistration,
+    build_quoted_import,
+    hookimpl,
+)
+
+_QUERY = r"""
+(declaration
+  (property_name) @_var_name
+  (#match? @_var_name "^[$]")) @variable
+
+(mixin_statement
+  (identifier) @_fn_name) @function
+
+(function_statement
+  (identifier) @_fn_name) @function
+
+(rule_set
+  (selectors) @_section_name) @doc_section
+
+(media_statement) @doc_section
+
+(charset_statement) @doc_section
+
+(keyframes_statement
+  (keyframes_name) @_section_name) @doc_section
+
+(use_statement
+  (string_value) @_import_module) @import
+
+(forward_statement
+  (string_value) @_import_module) @import
+
+(import_statement
+  (string_value) @_import_module) @import
+"""
+
+
+class ScssPlugin:
+    """SCSS language support — Sass constructs + @use/@forward edges."""
+
+    @hookimpl
+    def rbtr_register_languages(self) -> list[LanguageRegistration]:
+        return [
+            LanguageRegistration(
+                id="scss",
+                extensions=frozenset({".scss"}),
+                grammar_module="tree_sitter_scss",
+                query=_QUERY,
+                scope_extractor=css_nesting_scope,
+                import_extractor=build_quoted_import,
+                import_targets=frozenset({"css", "scss", "less"}),
+                language_plugin_version=1,
+            ),
+        ]

packages/rbtr/src/rbtr/tests/languages/__snapshots__/test_samples/test_sample_edges_match_snapshot[less].json

@@ -0,0 +1,3 @@
+[
+  "less.less::@import \"base\"; -> base.less::@bg [imports]"
+]

packages/rbtr/src/rbtr/tests/languages/__snapshots__/test_samples/test_sample_edges_match_snapshot[scss].json

@@ -0,0 +1,5 @@
+[
+  "scss.scss::@forward \"theme\"; -> theme.scss::$radius [imports]",
+  "scss.scss::@import \"reset\"; -> reset.scss::* [imports]",
+  "scss.scss::@use \"config\"; -> config.scss::$brand [imports]"
+]

packages/rbtr/src/rbtr/tests/languages/__snapshots__/test_samples/test_sample_extraction_matches_snapshot[less].json

@@ -0,0 +1,182 @@
+[
+  {
+    "id": "8f10aa0b97fda5ea",
+    "blob_sha": "sha1",
+    "file_path": "base.less",
+    "kind": "variable",
+    "name": "@bg",
+    "scope": "",
+    "language": "less",
+    "content": "@bg: #ffffff;",
+    "line_start": 3,
+    "line_end": 3,
+    "metadata": {
+      "module": "",
+      "names": "",
+      "dots": "",
+      "language_hint": ""
+    }
+  },
+  {
+    "id": "14b448311d1139b8",
+    "blob_sha": "sha1",
+    "file_path": "less.less",
+    "kind": "import",
+    "name": "@import \"base\";",
+    "scope": "",
+    "language": "less",
+    "content": "@import \"base\";",
+    "line_start": 7,
+    "line_end": 7,
+    "metadata": {
+      "module": "base",
+      "names": "",
+      "dots": "",
+      "language_hint": ""
+    }
+  },
+  {
+    "id": "8d9441ee2a311c25",
+    "blob_sha": "sha1",
+    "file_path": "less.less",
+    "kind": "variable",
+    "name": "@primary",
+    "scope": "",
+    "language": "less",
+    "content": "@primary: #333;",
+    "line_start": 9,
+    "line_end": 9,
+    "metadata": {
+      "module": "",
+      "names": "",
+      "dots": "",
+      "language_hint": ""
+    }
+  },
+  {
+    "id": "7c7b0d1e3f708b87",
+    "blob_sha": "sha1",
+    "file_path": "less.less",
+    "kind": "variable",
+    "name": "@spacing",
+    "scope": "",
+    "language": "less",
+    "content": "@spacing: 8px;",
+    "line_start": 10,
+    "line_end": 10,
+    "metadata": {
+      "module": "",
+      "names": "",
+      "dots": "",
+      "language_hint": ""
+    }
+  },
+  {
+    "id": "70cc768af8829886",
+    "blob_sha": "sha1",
+    "file_path": "less.less",
+    "kind": "function",
+    "name": "rounded",
+    "scope": "",
+    "language": "less",
+    "content": ".rounded(@radius: 4px) {\n  border-radius: @radius;\n}",
+    "line_start": 12,
+    "line_end": 14,
+    "metadata": {
+      "module": "",
+      "names": "",
+      "dots": "",
+      "language_hint": ""
+    }
+  },
+  {
+    "id": "787412e930624b62",
+    "blob_sha": "sha1",
+    "file_path": "less.less",
+    "kind": "doc_section",
+    "name": ".greeter",
+    "scope": "",
+    "language": "less",
+    "content": ".greeter {\n  color: @primary;\n  padding: @spacing;\n  .rounded(8px);\n  .greeting-label {\n    text-transform: uppercase;\n  }\n}",
+    "line_start": 16,
+    "line_end": 23,
+    "metadata": {
+      "module": "",
+      "names": "",
+      "dots": "",
+      "language_hint": ""
+    }
+  },
+  {
+    "id": "a21acf50441166ff",
+    "blob_sha": "sha1",
+    "file_path": "less.less",
+    "kind": "doc_section",
+    "name": ".greeting-label",
+    "scope": ".greeter",
+    "language": "less",
+    "content": ".greeting-label {\n    text-transform: uppercase;\n  }",
+    "line_start": 20,
+    "line_end": 22,
+    "metadata": {
+      "module": "",
+      "names": "",
+      "dots": "",
+      "language_hint": ""
+    }
+  },
+  {
+    "id": "289a7c82bd01f03c",
+    "blob_sha": "sha1",
+    "file_path": "less.less",
+    "kind": "doc_section",
+    "name": "<anonymous>",
+    "scope": "",
+    "language": "less",
+    "content": "@media (max-width: 600px) {\n  .greeter {\n    font-size: 14px;\n  }\n}",
+    "line_start": 25,
+    "line_end": 29,
+    "metadata": {
+      "module": "",
+      "names": "",
+      "dots": "",
+      "language_hint": ""
+    }
+  },
+  {
+    "id": "a4d6c82c63beab1c",
+    "blob_sha": "sha1",
+    "file_path": "less.less",
+    "kind": "doc_section",
+    "name": ".greeter",
+    "scope": "",
+    "language": "less",
+    "content": ".greeter {\n    font-size: 14px;\n  }",
+    "line_start": 26,
+    "line_end": 28,
+    "metadata": {
+      "module": "",
+      "names": "",
+      "dots": "",
+      "language_hint": ""
+    }
+  },
+  {
+    "id": "4d89902ee8dcd396",
+    "blob_sha": "sha1",
+    "file_path": "less.less",
+    "kind": "doc_section",
+    "name": "greeting-fade",
+    "scope": "",
+    "language": "less",
+    "content": "@keyframes greeting-fade {\n  from {\n    opacity: 0;\n  }\n  to {\n    opacity: 1;\n  }\n}",
+    "line_start": 31,
+    "line_end": 38,
+    "metadata": {
+      "module": "",
+      "names": "",
+      "dots": "",
+      "language_hint": ""
+    }
+  }
+]