initial commit

directory.go

@@ -0,0 +1,52 @@
+package config
+
+import (
+	"fmt"
+	"os"
+	"path/filepath"
+)
+
+// RootDir checks the current working directory and its parent directories for
+// a given filename and returns the absolute path to the directory. If the file
+// is not found within the specified depth or any other error occurs, it will
+// panic. If depth is zero or negative, RootDir checks the current directory only.
+func RootDir(searchName string, depth ...int) string {
+	// Get the current working directory
+	cwd, err := os.Getwd()
+	if err != nil {
+		panic(err)
+	}
+
+	// Apply default depth if not provided
+	depthVal := 0
+	if len(depth) > 0 {
+		depthVal = depth[0]
+	}
+
+	// Walk directories up to the specified depth to find the file
+	path := walkRootDir(searchName, cwd, depthVal)
+	if path == "" {
+		panic(fmt.Errorf("RootDir checked %d directories, no '%s' file found", depthVal+1, searchName))
+	}
+
+	// Try to get the absolute path of the found directory
+	abs, err := filepath.Abs(path)
+	if err != nil || abs == "" {
+		panic(fmt.Errorf("RootDir failed to get absolute path: %v", err))
+	}
+
+	return abs
+}
+
+// walkRootDir recursively checks directories up to the specified reverseDepth.
+func walkRootDir(searchName, path string, reverseDepth int) string {
+	if _, err := os.Stat(filepath.Join(path, searchName)); err == nil {
+		return path
+	}
+
+	if reverseDepth > 0 {
+		return walkRootDir(searchName, path+"/..", reverseDepth-1)
+	}
+
+	return ""
+}