Default values for both user.name and user.email

The previous behavior was to set default values only if user.name was
not set, but to always set it for both. This only sets a value if there
wasn't one; this fixes cases where someone has a user.name but no
user.email (see included Dockerfile) or someone has a user.email but no
user.name (before the email would have been over-written).

models/repo.go

@@ -105,21 +105,18 @@ func NewRepoContext() {
 		log.Fatal(4, "Gogs requires Git version greater or equal to 1.7.1")
 	}
 
-	// Check if server has basic git setting and set if not.
-	if stdout, stderr, err := process.Exec("NewRepoContext(get setting)", "git", "config", "--get", "user.name"); err != nil || strings.TrimSpace(stdout) == "" {
-		// ExitError indicates user.name is not set
-		if _, ok := err.(*exec.ExitError); ok || strings.TrimSpace(stdout) == "" {
-			stndrdUserName := "Gogs"
-			stndrdUserEmail := "gogitservice@gmail.com"
-			if _, stderr, gerr := process.Exec("NewRepoContext(set name)", "git", "config", "--global", "user.name", stndrdUserName); gerr != nil {
-				log.Fatal(4, "Fail to set git user.name(%s): %s", gerr, stderr)
-			}
-			if _, stderr, gerr := process.Exec("NewRepoContext(set email)", "git", "config", "--global", "user.email", stndrdUserEmail); gerr != nil {
-				log.Fatal(4, "Fail to set git user.email(%s): %s", gerr, stderr)
+	// Check if server has user.email and user.name set correctly and set if they're not.
+	for configKey, defaultValue := range map[string]string{"user.name": "Gogs", "user.email": "gogitservice@gmail.com"} {
+		if stdout, stderr, err := process.Exec("NewRepoContext(get setting)", "git", "config", "--get", configKey); err != nil || strings.TrimSpace(stdout) == "" {
+			// ExitError indicates this config is not set
+			if _, ok := err.(*exec.ExitError); ok || strings.TrimSpace(stdout) == "" {
+				if _, stderr, gerr := process.Exec("NewRepoContext(set "+configKey+")", "git", "config", "--global", configKey, defaultValue); gerr != nil {
+					log.Fatal(4, "Fail to set git %s(%s): %s", configKey, gerr, stderr)
+				}
+				log.Info("Git config %s set to %s", configKey, defaultValue)
+			} else {
+				log.Fatal(4, "Fail to get git %s(%s): %s", configKey, err, stderr)
 			}
-			log.Info("Git user.name and user.email set to %s <%s>", stndrdUserName, stndrdUserEmail)
-		} else {
-			log.Fatal(4, "Fail to get git user.name(%s): %s", err, stderr)
 		}
 	}