chore: import upstream snapshot with attribution

internal/astquery/languages.go

@@ -0,0 +1,75 @@
+package astquery
+
+import (
+	sitter "github.com/zzet/gortex/internal/parser/tsitter"
+	bashlang "github.com/zzet/gortex/internal/parser/tsitter/bash"
+	clang "github.com/zzet/gortex/internal/parser/tsitter/c"
+	cpplang "github.com/zzet/gortex/internal/parser/tsitter/cpp"
+	csharplang "github.com/zzet/gortex/internal/parser/tsitter/csharp"
+	elixirlang "github.com/zzet/gortex/internal/parser/tsitter/elixir"
+	golang "github.com/zzet/gortex/internal/parser/tsitter/golang"
+	javalang "github.com/zzet/gortex/internal/parser/tsitter/java"
+	jslang "github.com/zzet/gortex/internal/parser/tsitter/javascript"
+	kotlinlang "github.com/zzet/gortex/internal/parser/tsitter/kotlin"
+	phplang "github.com/zzet/gortex/internal/parser/tsitter/php"
+	pylang "github.com/zzet/gortex/internal/parser/tsitter/python"
+	rubylang "github.com/zzet/gortex/internal/parser/tsitter/ruby"
+	rustlang "github.com/zzet/gortex/internal/parser/tsitter/rust"
+	scalalang "github.com/zzet/gortex/internal/parser/tsitter/scala"
+	tsxlang "github.com/zzet/gortex/internal/parser/tsitter/tsx"
+	tslang "github.com/zzet/gortex/internal/parser/tsitter/typescript"
+)
+
+// DefaultLanguageResolver maps the language strings stored on
+// KindFile nodes to their tree-sitter binding. The mapping covers
+// every language the bundled detectors reference plus a handful of
+// extras for raw-pattern queries. Languages that fall outside this
+// list return nil — the engine then skips the matching targets
+// (ast-grep behaves identically when its grammar isn't available).
+//
+// To extend: add the import + entry here. The detector definitions
+// reference languages by string, not by binding pointer, so adding a
+// language here doesn't require touching detectors.go.
+func DefaultLanguageResolver(name string) *sitter.Language {
+	switch name {
+	case "go":
+		return golang.GetLanguage()
+	case "python":
+		return pylang.GetLanguage()
+	case "javascript":
+		return jslang.GetLanguage()
+	case "typescript":
+		// The plain .ts grammar handles JSX-free TypeScript. .tsx
+		// targets get retagged as "tsx" upstream so JSX-using
+		// detectors compile against the TSX grammar below.
+		return tslang.GetLanguage()
+	case "tsx":
+		// Superset of the TS grammar that exposes JSX nodes
+		// (jsx_element, jsx_attribute, …). Picked for .tsx targets
+		// so detectors that look for JSX shapes can compile cleanly.
+		return tsxlang.GetLanguage()
+	case "ruby":
+		return rubylang.GetLanguage()
+	case "java":
+		return javalang.GetLanguage()
+	case "kotlin":
+		return kotlinlang.GetLanguage()
+	case "scala":
+		return scalalang.GetLanguage()
+	case "rust":
+		return rustlang.GetLanguage()
+	case "elixir":
+		return elixirlang.GetLanguage()
+	case "php":
+		return phplang.GetLanguage()
+	case "c":
+		return clang.GetLanguage()
+	case "cpp", "c++":
+		return cpplang.GetLanguage()
+	case "csharp", "c#":
+		return csharplang.GetLanguage()
+	case "bash", "shell", "sh":
+		return bashlang.GetLanguage()
+	}
+	return nil
+}