Add support for JavaScript by gkorland · Pull Request #593 · FalkorDB/code-graph

gkorland · 2026-03-10T08:58:32Z

Migrated from falkordb/code-graph-backend#59

Summary

Add support for JavaScript code analysis using tree-sitter.

Changes:

New JavaScriptAnalyzer class using tree-sitter for JavaScript
Extracts functions and classes from JavaScript code
First and second pass analysis methods
Updated source_analyzer.py to include JavaScript
Added tree-sitter-javascript dependency

Resolves #540

Originally authored by @gkorland in falkordb/code-graph-backend#59

Migrated from FalkorDB/code-graph-backend PR #59. Original issue: FalkorDB/code-graph-backend#51 Resolves #540 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

vercel · 2026-03-10T08:58:33Z

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📥 Commits

Reviewing files that changed from the base of the PR and between 887b82f and 849ffb1.

📒 Files selected for processing (4)

api/analyzers/javascript/__init__.py
api/analyzers/javascript/analyzer.py
api/analyzers/source_analyzer.py
pyproject.toml

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api/analyzers/source_analyzer.py

api/analyzers/javascript/analyzer.py

+            heritage = entity.node.child_by_field_name('body')
+            if heritage is None:
+                return
+            superclass_node = entity.node.child_by_field_name('name')


Copilot

Pull request overview

Adds JavaScript language support to the backend source analysis pipeline by introducing a Tree-sitter-based analyzer and wiring it into SourceAnalyzer, enabling JS projects to be parsed into the graph model.

Changes:

Added JavaScriptAnalyzer (Tree-sitter JavaScript) to extract JS entities (functions/classes/methods).
Wired .js into SourceAnalyzer’s analyzer registry and file discovery.
Added tree-sitter-javascript as a Python dependency.

Reviewed changes

Copilot reviewed 3 out of 4 changed files in this pull request and generated 5 comments.

File	Description
`pyproject.toml`	Adds the `tree-sitter-javascript` dependency required for JS parsing.
`api/analyzers/source_analyzer.py`	Registers `.js` analyzer, includes JS files in discovery, and includes a JS LSP placeholder in second pass.
`api/analyzers/javascript/analyzer.py`	Implements Tree-sitter-based JavaScript entity extraction and symbol collection/resolution hooks.
`api/analyzers/javascript/__init__.py`	Declares the new analyzer package.

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pyproject.toml

    "tree-sitter-c>=0.24.1,<0.25.0",
    "tree-sitter-python>=0.25.0,<0.26.0",
    "tree-sitter-java>=0.23.5,<0.24.0",
+"tree-sitter-javascript>=0.23.0",


api/analyzers/source_analyzer.py

    def analyze_sources(self, path: Path, ignore: list[str], graph: Graph) -> None:
        path = path.resolve()
-        files = list(path.rglob("*.java")) + list(path.rglob("*.py")) + list(path.rglob("*.cs"))
+        files = list(path.rglob("*.java")) + list(path.rglob("*.py")) + list(path.rglob("*.cs")) + list(path.rglob("*.js"))


api/analyzers/javascript/analyzer.py

+            captures = query.captures(entity.node)
+            if 'reference.call' in captures:
+                for caller in captures['reference.call']:
+                    entity.add_symbol("call", caller)
+            query = self.language.query("(formal_parameters (identifier) @parameter)")
+            captures = query.captures(entity.node)


api/analyzers/javascript/analyzer.py

+            heritage = entity.node.child_by_field_name('body')
+            if heritage is None:
+                return
+            superclass_node = entity.node.child_by_field_name('name')


api/analyzers/source_analyzer.py

 analyzers: dict[str, AbstractAnalyzer] = {
    # '.c': CAnalyzer(),
    # '.h': CAnalyzer(),
    '.py': PythonAnalyzer(),
    '.java': JavaAnalyzer(),
-    '.cs': CSharpAnalyzer()}
+    '.cs': CSharpAnalyzer(),
+    '.js': JavaScriptAnalyzer()}


Add support for JavaScript

b1a6b81

Migrated from FalkorDB/code-graph-backend PR #59. Original issue: FalkorDB/code-graph-backend#51 Resolves #540 Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

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api/analyzers/javascript/analyzer.py

heritage = entity.node.child_by_field_name('body')

if heritage is None:

return

superclass_node = entity.node.child_by_field_name('name')

Merge branch 'staging' into backend/add-javascript-support

849ffb1

gkorland requested a review from Copilot March 18, 2026 07:52

Copilot started reviewing on behalf of gkorland March 18, 2026 07:52 View session

Copilot AI reviewed Mar 18, 2026

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Add support for JavaScript#593

Add support for JavaScript#593
gkorland wants to merge 2 commits intostagingfrom
backend/add-javascript-support

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gkorland commented Mar 10, 2026

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