From f2c4ba662ff117297bc5f5bcd52e2dd0ef9107b4 Mon Sep 17 00:00:00 2001
From: "Dr. Stefan Schimanski" <stefan.schimanski@gmail.com>
Date: Fri, 2 Jun 2023 09:14:18 +0200
Subject: [PATCH] Recursively search goio.yaml

---
 README.md |  7 +++----
 main.go   | 29 ++++++++++++++++++++++++++++-
 2 files changed, 31 insertions(+), 5 deletions(-)

diff --git a/README.md b/README.md
index 32480d2..3182298 100644
--- a/README.md
+++ b/README.md
@@ -10,11 +10,10 @@ A customizable imports organizer for the Go programming language
 
 # <a name='summary'></a>Summary
 `goio` is a fully customizable Go imports organizer. The configuration
-is project based and is stored in a `goio.yaml` file in the root of your
+is project based and is stored in a `goio.yaml` file, e.g. in the root of your
 module's project folder alongside the `go.mod` file. For consistency
-the `goio.yaml` file should be committed to your projects vcs.
-
-
+the `goio.yaml` file should be committed to your projects vcs. If no `goio.yaml`
+file is found, `goio` will try to find one walking up the directory tree.
 
 # <a name='command-line-tool'></a>Command Line Tool
 
diff --git a/main.go b/main.go
index a449dac..0059729 100644
--- a/main.go
+++ b/main.go
@@ -76,8 +76,19 @@ func main() {
 		os.Exit(1)
 	}
 
+	// Find a goio.yaml file in the current directory or any parent directory
+	path, found, err := findFile(currentDir, "goio.yaml")
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "error occurred finding configuration file goio.yaml: %v\n", err)
+		os.Exit(1)
+	}
+	if !found {
+		fmt.Fprint(os.Stderr, "error occurred finding configuration file goio.yaml\n")
+		os.Exit(1)
+	}
+
 	// Load the configuration from the goio.yaml file
-	conf, err := config.Load("goio.yaml")
+	conf, err := config.Load(path)
 	if err != nil {
 		fmt.Fprintf(os.Stderr, "error occurred loading configuration file: %s\n", err.Error())
 		os.Exit(1)
@@ -184,3 +195,19 @@ func main() {
 		}
 	}
 }
+
+func findFile(path, fileName string) (string, bool, error) {
+	for {
+		_, err := os.Stat(filepath.Join(path, fileName))
+		if err == nil {
+			return filepath.Join(path, fileName), true, nil
+		}
+		if !os.IsNotExist(err) {
+			return "", false, err
+		}
+		if path == "/" {
+			return "", false, nil
+		}
+		path = filepath.Dir(path)
+	}
+}