(Feat): Initial Commit

internal/util/get_project_root_dir.go

@@ -0,0 +1,36 @@
+//go:build !scripts
+
+// nolint:revive
+package util
+
+import (
+	"os"
+	"path/filepath"
+	"sync"
+
+	"github.com/rs/zerolog/log"
+)
+
+var (
+	projectRootDir string
+	dirOnce        sync.Once
+)
+
+// GetProjectRootDir returns the path as string to the project_root for a **running application**.
+// Note: This function should not be used for generation targets (go generate, make go-generate).
+// Thus it's explicitly excluded from the build tag scripts, see instead:
+// * /scripts/get_project_root_dir.go
+// * ./get_project_root_dir_scripts.go (delegates to above)
+// https://stackoverflow.com/questions/43215655/building-multiple-binaries-using-different-packages-and-build-tags
+func GetProjectRootDir() string {
+	dirOnce.Do(func() {
+		ex, err := os.Executable()
+		if err != nil {
+			log.Panic().Err(err).Msg("Failed to get executable path while retrieving project root directory")
+		}
+
+		projectRootDir = GetEnv("PROJECT_ROOT_DIR", filepath.Dir(ex))
+	})
+
+	return projectRootDir
+}