Address issue godotengine#172, to use public key path if present in preference

to using password.

Author: markeel

.gitmodules

@@ -5,6 +5,7 @@
 [submodule "libgit2"]
 	path = thirdparty/git2/libgit2
 	url = https://github.com/libgit2/libgit2
+	ignore = untracked
 [submodule "thirdparty/ssh2/libssh2"]
 	path = thirdparty/ssh2/libssh2
 	url = https://github.com/libssh2/libssh2

godot-git-plugin/src/git_callbacks.cpp

@@ -82,17 +82,20 @@ extern "C" int credentials_cb(git_cred **out, const char *url, const char *usern
 
 	godot::String proper_username = username_from_url ? username_from_url : creds->username;
 
+	if (!creds->ssh_public_key_path.is_empty()) {
+		if (allowed_types & GIT_CREDENTIAL_SSH_KEY) {
+			return git_credential_ssh_key_new(out,
+					CString(proper_username).data,
+					CString(creds->ssh_public_key_path).data,
+					CString(creds->ssh_private_key_path).data,
+					CString(creds->ssh_passphrase).data);
+		}
+	}
+
 	if (allowed_types & GIT_CREDENTIAL_USERPASS_PLAINTEXT) {
 		return git_cred_userpass_plaintext_new(out, CString(proper_username).data, CString(creds->password).data);
 	}
 
-	if (allowed_types & GIT_CREDENTIAL_SSH_KEY) {
-		return git_credential_ssh_key_new(out,
-				CString(proper_username).data,
-				CString(creds->ssh_public_key_path).data,
-				CString(creds->ssh_private_key_path).data,
-				CString(creds->ssh_passphrase).data);
-	}
 
 	if (allowed_types & GIT_CREDENTIAL_USERNAME) {
 		return git_credential_username_new(out, CString(proper_username).data);