From cfe82d9f444a1b77f135070f1c1ee63fa061f2fd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Anselm=20Sch=C3=BCler?= <mail@anselmschueler.com>
Date: Tue, 19 Oct 2021 06:43:52 +0200
Subject: [PATCH] gh: support gh as git credential manager for github.com

Co-authored-by: Sumner Evans <me@sumnerevans.com>
---
 modules/programs/gh.nix                       |  9 ++++++++
 .../programs/gh/credential-helper.git.conf    |  2 ++
 .../modules/programs/gh/credential-helper.nix | 21 +++++++++++++++++++
 tests/modules/programs/gh/default.nix         |  1 +
 4 files changed, 33 insertions(+)
 create mode 100644 tests/modules/programs/gh/credential-helper.git.conf
 create mode 100644 tests/modules/programs/gh/credential-helper.nix

diff --git a/modules/programs/gh.nix b/modules/programs/gh.nix
index fd44d22b0..ba457c8cb 100644
--- a/modules/programs/gh.nix
+++ b/modules/programs/gh.nix
@@ -90,6 +90,11 @@ in {
         };
       '';
     };
+
+    enableGitCredentialHelper =
+      mkEnableOption "the gh git credential helper for github.com" // {
+        default = true;
+      };
   };
 
   config = mkIf cfg.enable {
@@ -97,5 +102,9 @@ in {
 
     xdg.configFile."gh/config.yml".source =
       yamlFormat.generate "gh-config.yml" cfg.settings;
+
+    programs.git.extraConfig.credential."https://github.com".helper =
+      mkIf cfg.enableGitCredentialHelper
+      "${cfg.package}/bin/gh auth git-credential";
   };
 }
diff --git a/tests/modules/programs/gh/credential-helper.git.conf b/tests/modules/programs/gh/credential-helper.git.conf
new file mode 100644
index 000000000..ea2c61ee4
--- /dev/null
+++ b/tests/modules/programs/gh/credential-helper.git.conf
@@ -0,0 +1,2 @@
+[credential "https://github.com"]
+	helper = "@gh@/bin/gh auth git-credential"
diff --git a/tests/modules/programs/gh/credential-helper.nix b/tests/modules/programs/gh/credential-helper.nix
new file mode 100644
index 000000000..e7ee8e42b
--- /dev/null
+++ b/tests/modules/programs/gh/credential-helper.nix
@@ -0,0 +1,21 @@
+{ config, lib, pkgs, ... }:
+
+{
+  programs.gh = {
+    enable = true;
+    enableGitCredentialHelper = true;
+  };
+
+  programs.git.enable = true;
+
+  test.stubs = {
+    gh = { };
+    git = { };
+  };
+
+  nmt.script = ''
+    assertFileExists home-files/.config/git/config
+    assertFileContent home-files/.config/git/config \
+      ${./credential-helper.git.conf}
+  '';
+}
diff --git a/tests/modules/programs/gh/default.nix b/tests/modules/programs/gh/default.nix
index 0a9157448..c683b484e 100644
--- a/tests/modules/programs/gh/default.nix
+++ b/tests/modules/programs/gh/default.nix
@@ -1,4 +1,5 @@
 {
   gh-config-file = ./config-file.nix;
+  gh-credential-helper = ./credential-helper.nix;
   gh-warnings = ./warnings.nix;
 }