vendor tsgo

tools/tsgo/internal/repo/paths.go

@@ -0,0 +1,87 @@
+package repo
+
+import (
+	"os"
+	"path/filepath"
+	"runtime"
+	"strings"
+	"sync"
+)
+
+var rootPath = sync.OnceValue(func() string {
+	_, filename, _, ok := runtime.Caller(0)
+	if !ok {
+		panic("could not get current filename")
+	}
+	filename = filepath.FromSlash(filename) // runtime.Caller always returns forward slashes; https://go.dev/issues/3335, https://go.dev/cl/603275
+
+	if strings.HasPrefix(filename, "github.com/") {
+		panic("repo root cannot be found when built with -trimpath")
+	}
+
+	if !filepath.IsAbs(filename) {
+		panic(filename + " is not an absolute path")
+	}
+
+	root := filepath.VolumeName(filename) + string(filepath.Separator)
+
+	dir := filepath.Dir(filename)
+	for {
+		if _, err := os.Stat(filepath.Join(dir, "go.mod")); err == nil {
+			return dir
+		}
+		if dir == root {
+			break
+		}
+		dir = filepath.Dir(dir)
+	}
+
+	panic("could not find go.mod above " + filename)
+})
+
+func RootPath() string {
+	return rootPath()
+}
+
+var typeScriptSubmodulePath = sync.OnceValue(func() string {
+	return filepath.Join(rootPath(), "_submodules", "TypeScript")
+})
+
+func TypeScriptSubmodulePath() string {
+	return typeScriptSubmodulePath()
+}
+
+var testDataPath = sync.OnceValue(func() string {
+	return filepath.Join(rootPath(), "testdata")
+})
+
+func TestDataPath() string {
+	return testDataPath()
+}
+
+var typeScriptSubmoduleExists = sync.OnceValue(func() bool {
+	p := filepath.Join(typeScriptSubmodulePath(), "package.json")
+	if _, err := os.Stat(p); err != nil {
+		if os.IsNotExist(err) {
+			return false
+		}
+		panic(err)
+	}
+	return true
+})
+
+func TypeScriptSubmoduleExists() bool {
+	return typeScriptSubmoduleExists()
+}
+
+type SkippableTest interface {
+	Helper()
+	Skipf(format string, args ...any)
+}
+
+func SkipIfNoTypeScriptSubmodule(t SkippableTest) {
+	t.Helper()
+	if !typeScriptSubmoduleExists() {
+		t.Skipf("TypeScript submodule does not exist")
+	}
+}