tsanalyzer

Documentation

Overview

Package tsanalyzer implements the lang.Language interface for TypeScript (and .tsx). It is blank-imported from cmd/diffguard/main.go so TypeScript gets registered at process start.

One file per concern, mirroring the Go and Rust analyzers:

• tsanalyzer.go -- Language + init()/Register + detector
• parse.go -- tree-sitter setup, CST helpers, grammar pick
• sizes.go -- FunctionExtractor
• complexity.go -- ComplexityCalculator + ComplexityScorer
• deps.go -- ImportResolver
• mutation_generate.go-- MutantGenerator
• mutation_apply.go -- MutantApplier
• mutation_annotate.go-- AnnotationScanner
• testrunner.go -- TestRunner (wraps vitest/jest/npm test)

Unlike the Go analyzer, TypeScript requires two tree-sitter grammars: one for `.ts` (typescript) and one for `.tsx` (tsx). The two grammars are nearly identical for our purposes (node kinds like `if_statement`, `function_declaration`, etc. are shared) but the parser input has to match the extension — the tsx grammar accepts JSX syntax, the plain typescript grammar rejects it.

Index

• type Language
  • func (*Language) AnnotationScanner() lang.AnnotationScanner
  • func (*Language) ComplexityCalculator() lang.ComplexityCalculator
  • func (*Language) ComplexityScorer() lang.ComplexityScorer
  • func (*Language) DeadCodeDetector() lang.DeadCodeDetector
  • func (*Language) FileFilter() lang.FileFilter
  • func (*Language) FunctionExtractor() lang.FunctionExtractor
  • func (*Language) ImportResolver() lang.ImportResolver
  • func (*Language) MutantApplier() lang.MutantApplier
  • func (*Language) MutantGenerator() lang.MutantGenerator
  • func (*Language) Name() string
  • func (*Language) TestRunner() lang.TestRunner

Types

type Language

type Language struct{}

Language is the TypeScript implementation of lang.Language. Like the Go and Rust analyzers, it holds no state; sub-component impls are stateless.

func (*Language) AnnotationScanner

func (*Language) AnnotationScanner() lang.AnnotationScanner

func (*Language) ComplexityCalculator

func (*Language) ComplexityCalculator() lang.ComplexityCalculator

Sub-component accessors. Stateless impls return fresh zero-value structs.

func (*Language) ComplexityScorer

func (*Language) ComplexityScorer() lang.ComplexityScorer

func (*Language) DeadCodeDetector

func (*Language) DeadCodeDetector() lang.DeadCodeDetector

func (*Language) FileFilter

func (*Language) FileFilter() lang.FileFilter

FileFilter returns the TypeScript-specific file selection rules used by the diff parser: .ts and .tsx extensions; anything matching our test suffix list OR sitting under a __tests__ / __mocks__ segment counts as a test file. We deliberately exclude .js / .jsx / .mjs / .cjs — JS-only repos are out of scope for this analyzer (the detector backs that choice up by only firing when at least one .ts/.tsx file is present).

func (*Language) FunctionExtractor

func (*Language) FunctionExtractor() lang.FunctionExtractor

func (*Language) ImportResolver

func (*Language) ImportResolver() lang.ImportResolver

func (*Language) MutantApplier

func (*Language) MutantApplier() lang.MutantApplier

func (*Language) MutantGenerator

func (*Language) MutantGenerator() lang.MutantGenerator

func (*Language) Name

func (*Language) Name() string

Name returns the canonical language identifier used by the registry and by report section suffixes.

func (*Language) TestRunner

func (*Language) TestRunner() lang.TestRunner