From 1ac635d6007b620b0850fb5e7e68cfb7b8badca7 Mon Sep 17 00:00:00 2001
From: John Ericson <John.Ericson@Obsidian.Systems>
Date: Thu, 25 Apr 2024 16:07:00 -0400
Subject: [PATCH] perl: Allow running `yath test` in the build directory

For most purposes, the stock `ninja test` should be fine, but this
allows for doing other things with the `yath` during development.
---
 perl/.yath.rc    |  2 --
 perl/.yath.rc.in |  2 ++
 perl/default.nix |  2 +-
 perl/meson.build | 16 ++++++++++++----
 4 files changed, 15 insertions(+), 7 deletions(-)
 delete mode 100644 perl/.yath.rc
 create mode 100644 perl/.yath.rc.in

diff --git a/perl/.yath.rc b/perl/.yath.rc
deleted file mode 100644
index 118bf80c8..000000000
--- a/perl/.yath.rc
+++ /dev/null
@@ -1,2 +0,0 @@
-[test]
--I=rel(lib/Nix)
diff --git a/perl/.yath.rc.in b/perl/.yath.rc.in
new file mode 100644
index 000000000..e6f5f93ec
--- /dev/null
+++ b/perl/.yath.rc.in
@@ -0,0 +1,2 @@
+[test]
+-I=rel(@lib_dir@)
diff --git a/perl/default.nix b/perl/default.nix
index 185c8126f..45682381e 100644
--- a/perl/default.nix
+++ b/perl/default.nix
@@ -26,7 +26,7 @@ perl.pkgs.toPerlModule (stdenv.mkDerivation (finalAttrs: {
       ./meson.build
       ./meson_options.txt
     ] ++ lib.optionals finalAttrs.doCheck [
-      ./.yath.rc
+      ./.yath.rc.in
       ./t
     ]);
   };
diff --git a/perl/meson.build b/perl/meson.build
index bbeb0afa1..350e5bd67 100644
--- a/perl/meson.build
+++ b/perl/meson.build
@@ -138,15 +138,23 @@ nix_perl_store_dep_list = [
 
 # # build
 # #-------------------------------------------------
-subdir('lib/Nix')
+lib_dir = join_paths('lib', 'Nix')
+subdir(lib_dir)
 
 if get_option('tests').enabled()
+  yath_rc_conf = configuration_data()
+  yath_rc_conf.set('lib_dir', lib_dir)
+  yath_rc = configure_file(
+    output : '.yath.rc',
+    input : '.yath.rc.in',
+    configuration : yath_rc_conf,
+  )
   subdir('t')
   test(
     'nix-perl-test',
     yath,
-    args : [
-      '-I=@0@'.format( join_paths( meson.current_build_dir(), 'lib', 'Nix') ),
-    ],
+    args : ['test'],
+    workdir : meson.current_build_dir(),
+    depends : [nix_perl_store_lib],
   )
 endif