feat: add codegraph tool for querying pre-computed codebase dependency graph
- Implemented `tools-codegraph.ts` to provide various queries on the codebase dependency graph, including impact analysis, dead code detection, module boundaries, and more. - Created a schema for validating query inputs using Zod. - Developed helper functions for resolving file paths, formatting output, and handling different query types. - Added tests for the codegraph queries in `codegraph-queries.test.ts` to ensure functionality and correctness. - Introduced tests for the codegraph scanning and loading functionalities in `codegraph.test.ts`, verifying the detection of source files, imports, exports, circular dependencies, and entry points.
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asepharyana
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import { expect, test } from 'bun:test';
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import { executeCodegraphQuery } from '../src/tools-codegraph';
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import { join } from 'node:path';
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const ROOT = join(import.meta.dir, '..');
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test('impact query shows transitively affected files', () => {
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const result = executeCodegraphQuery({ query: 'impact', path: 'config' }, ROOT);
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expect(result).toContain('Impact of changing');
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expect(result).toContain('src/config.ts');
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// config.ts is imported by session.ts which is imported by cli.tsx
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expect(result).toContain('src/cli.tsx');
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expect(result).toContain('file(s) affected');
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});
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test('dead code detection finds scripts', () => {
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const result = executeCodegraphQuery({ query: 'dead' }, ROOT);
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expect(result).toContain('scripts/release.ts');
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expect(result).toContain('scripts/install.ts');
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});
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test('tests query finds test files covering a source file', () => {
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const result = executeCodegraphQuery({ query: 'tests', path: 'config' }, ROOT);
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expect(result.toLowerCase()).toContain('test files');
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expect(result).toContain('src/config.ts');
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});
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test('boundaries shows module dependency matrix', () => {
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const result = executeCodegraphQuery({ query: 'boundaries' }, ROOT);
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expect(result).toContain('Module boundaries');
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expect(result).toContain('src/');
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expect(result).toContain('test/');
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});
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test('depth query shows import chain depth', () => {
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const result = executeCodegraphQuery({ query: 'depth', path: 'cli' }, ROOT);
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expect(result).toContain('Import depth');
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expect(result).toContain('Max depth:');
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expect(result).toContain('Total reachable:');
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});
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test('cycle-check detects safe addition', () => {
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const result = executeCodegraphQuery({ query: 'cycle-check', path: 'memory', target: 'pricing' }, ROOT);
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expect(result).toContain('No cycle');
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expect(result).toContain('safe');
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});
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test('cycle-check detects cycle when one exists', () => {
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// config.ts already imports providers.ts, and providers.ts imports config.ts
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// So adding providers → config would be redundant but not a new cycle
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// Let's test with a known safe pair
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const result = executeCodegraphQuery({ query: 'cycle-check', path: 'pricing', target: 'config' }, ROOT);
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expect(result).toContain('No cycle');
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});
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test('cycle-check rejects self-import', () => {
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const result = executeCodegraphQuery({ query: 'cycle-check', path: 'config', target: 'config' }, ROOT);
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expect(result).toContain('Cannot import self');
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});
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test('impact with no importers returns self-contained message', () => {
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const result = executeCodegraphQuery({ query: 'impact', path: 'cli' }, ROOT);
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// cli.tsx is the entry point — not imported by anything
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expect(result).toContain('self-contained');
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});
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import { expect, test } from 'bun:test';
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import { join } from 'node:path';
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import { mkdtempSync, writeFileSync, mkdirSync } from 'node:fs';
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import { tmpdir } from 'node:os';
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import { scanCodebase, loadGraph, saveGraph, isGraphFresh } from '../src/codegraph';
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const SHIRO_ROOT = join(import.meta.dir, '..');
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test('scanCodebase detects source files and generates a summary', () => {
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const graph = scanCodebase(SHIRO_ROOT);
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expect(graph.version).toBe(1);
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expect(Object.keys(graph.files).length).toBeGreaterThan(10);
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// shiro-neko has src/cli.tsx as a core file
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const sourceFiles = Object.keys(graph.files).filter((f) => graph.files[f]?.kind === 'source');
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expect(sourceFiles.length).toBeGreaterThan(20);
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// Summary is populated
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expect(graph.summary).toContain('Codebase Architecture');
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expect(graph.summary).toContain('Modules');
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expect(graph.summary).toContain('Circular deps');
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});
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test('scanCodebase extracts imports from source files', () => {
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const graph = scanCodebase(SHIRO_ROOT);
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// session.ts should import from prompt.ts
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const sessionNode = graph.files['src/session.ts'];
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expect(sessionNode).toBeDefined();
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expect(sessionNode!.imports.length).toBeGreaterThan(0);
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expect(sessionNode!.imports).toContain('src/prompt.ts');
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});
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test('scanCodebase detects exported types and functions', () => {
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const graph = scanCodebase(SHIRO_ROOT);
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// config.ts should export a Config type
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const configNode = graph.files['src/config.ts'];
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expect(configNode).toBeDefined();
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expect(configNode!.types.length).toBeGreaterThan(0);
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expect(configNode!.types).toContain('Config');
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});
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test('scanCodebase detects circular dependencies', () => {
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const graph = scanCodebase(SHIRO_ROOT);
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// shiro-neko has a known circular: providers.ts <-> config.ts
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expect(graph.circularDeps.length).toBeGreaterThanOrEqual(1);
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const hasCircular = graph.circularDeps.some((cycle) =>
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cycle.some((f) => f.includes('providers') || f.includes('config')),
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);
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expect(hasCircular).toBe(true);
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});
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test('scanCodebase detects entry points', () => {
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const graph = scanCodebase(SHIRO_ROOT);
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// Should detect cli.tsx as an entry point or at least some
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expect(graph.entryPoints.length).toBeGreaterThan(0);
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});
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test('saveGraph and loadGraph round-trip', () => {
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const graph = scanCodebase(SHIRO_ROOT);
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const dir = mkdtempSync(join(tmpdir(), 'codegraph-test-'));
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saveGraph(dir, graph);
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const loaded = loadGraph(dir);
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expect(loaded).not.toBeNull();
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expect(loaded!.version).toBe(1);
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expect(Object.keys(loaded!.files).length).toBe(Object.keys(graph.files).length);
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});
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test('isGraphFresh returns true for unchanged files', () => {
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const graph = scanCodebase(SHIRO_ROOT);
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// Graph was just generated from these files, so it should be fresh
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expect(isGraphFresh(SHIRO_ROOT, graph)).toBe(true);
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});
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test('scanCodebase works on a minimal TypeScript project', () => {
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const dir = mkdtempSync(join(tmpdir(), 'codegraph-min-'));
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// Create a minimal project
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writeFileSync(join(dir, 'tsconfig.json'), JSON.stringify({
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compilerOptions: { target: 'esnext', module: 'esnext', moduleResolution: 'bundler' },
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include: ['src/**/*.ts'],
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}));
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mkdirSync(join(dir, 'src'), { recursive: true });
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writeFileSync(join(dir, 'src/index.ts'), `
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import { greet } from './greeting';
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export type Config = { name: string };
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export function main(): void { greet('world'); }
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`);
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writeFileSync(join(dir, 'src/greeting.ts'), `
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export function greet(name: string): string { return \`Hello \${name}\`; }
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`);
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const graph = scanCodebase(dir);
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expect(Object.keys(graph.files).length).toBe(2);
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expect(graph.files['src/index.ts']).toBeDefined();
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expect(graph.files['src/greeting.ts']).toBeDefined();
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expect(graph.files['src/index.ts']!.imports).toContain('src/greeting.ts');
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expect(graph.files['src/index.ts']!.types).toContain('Config');
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expect(graph.files['src/index.ts']!.functions).toContain('main');
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expect(graph.files['src/greeting.ts']!.functions).toContain('greet');
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expect(graph.summary).toContain('Modules');
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expect(graph.summary).toContain('src → 2 files');
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});
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