From 7ceaf81ee5fbde2a0dcfca4d94b179f8f323b97f Mon Sep 17 00:00:00 2001
From: xdrm-brackets <doowap31@gmail.com>
Date: Mon, 12 Nov 2018 20:01:07 +0100
Subject: [PATCH] update cnf/loader to infer parser (config format) from
 content

---
 internal/cnf/loader.go | 31 ++++++++++++++++++++++++++-----
 1 file changed, 26 insertions(+), 5 deletions(-)

diff --git a/internal/cnf/loader.go b/internal/cnf/loader.go
index fefa723..7a669ac 100644
--- a/internal/cnf/loader.go
+++ b/internal/cnf/loader.go
@@ -42,11 +42,11 @@ func Load(path string) (ConfigurationFormat, error) {
 
 		// parse
 		_, err = confFormat.ReadFrom(file)
-		if err != nil {
-			return nil, fmt.Errorf("cannot parse file as '%s' | %s", extension, err)
+		if err == nil {
+			return confFormat, nil
 		}
 
-		return confFormat, nil
+		// return nil, fmt.Errorf("cannot parse file as '%s' | %s", extension, err)
 
 	}
 
@@ -72,11 +72,11 @@ func loadFromExtension(ext string) ConfigurationFormat {
 	switch ext {
 	case ".json":
 		return new(json)
-	case ".ini":
+	case ".ini", ".conf":
 		return new(ini)
 	case ".yaml":
 		return new(yaml)
-	case ".conf":
+	case ".nginx":
 		return new(nginx)
 	default:
 		return nil
@@ -85,5 +85,26 @@ func loadFromExtension(ext string) ConfigurationFormat {
 }
 
 func loadFromContent(file io.Reader) ConfigurationFormat {
+
+	// extensions ordered by unicity of the language's syntax
+	extensions := []string{".json", ".yaml", ".nginx", ".ini"}
+
+	// try to load each available extension
+	for _, ext := range extensions {
+
+		// load parser
+		c := loadFromExtension(ext)
+		if c == nil {
+			continue
+		}
+
+		// parse
+		_, err := c.ReadFrom(file)
+		if err == nil {
+			return c
+		}
+
+	}
+
 	return nil
 }