age: Debug why builds fail on Darwin

derivation:
  - patch
  - only run TestScript/plugin test and be verbose

age patch:
  - AGEDEBUG=plugin
  - remove stderr checks

pkgs/tools/security/age/default.nix

@@ -31,6 +31,8 @@ buildGoModule rec {
       url = "https://github.com/FiloSottile/age/commit/edf7388f7731b274b055dcab3ec4006cc4961b68.patch";
       sha256 = "sha256-CloCj/uF3cqTeCfRkV6TeYiovuDQXm1ZIklREWAot1E=";
     })
+
+    ./test-agedebug-plugin.patch
   ];
 
   ldflags = [
@@ -43,6 +45,10 @@ buildGoModule rec {
     installManPage doc/*.1
   '';
 
+  preCheck = ''
+    buildFlagsArray+=("-v" "-run" "TestScript/plugin")
+  '';
+
   doInstallCheck = true;
   installCheckPhase = ''
     if [[ "$("$out/bin/${pname}" --version)" == "${version}" ]]; then

pkgs/tools/security/age/test-agedebug-plugin.patch

@@ -0,0 +1,21 @@
+diff --git a/cmd/age/testdata/plugin.txt b/cmd/age/testdata/plugin.txt
+index 01e3ed8..f8c3234 100644
+--- a/cmd/age/testdata/plugin.txt
++++ b/cmd/age/testdata/plugin.txt
+@@ -1,14 +1,14 @@
++env AGEDEBUG=plugin
++
+ # encrypt and decrypt a file with a test plugin
+ age -r age1test10qdmzv9q -o test.age input
+ age -d -i key.txt test.age
+ cmp stdout input
+-! stderr .
+
+ # very long identity and recipient
+ age -R long-recipient.txt -o test.age input
+ age -d -i long-key.txt test.age
+ cmp stdout input
+-! stderr .
+
+ -- input --
+ test