Add GHC 9.12.1

Author: hamishmack

ci.nix

@@ -73,6 +73,7 @@
         ghc98llvm = false;
         ghc910 = true;
         ghc910llvm = true;
+        ghc9121 = true;
         ghc912X = true;
         ghc913 = true;
       })));

lazy-inputs/default.nix

@@ -34,6 +34,7 @@ in {
       inherit ((callFlake { pkgs = final; src = ./ghc983; }).defaultNix) ghc983;
       inherit ((callFlake { pkgs = final; src = ./ghc984; }).defaultNix) ghc984;
       inherit ((callFlake { pkgs = final; src = ./ghc9101; }).defaultNix) ghc9101;
+      inherit ((callFlake { pkgs = final; src = ./ghc9121; }).defaultNix) ghc9121;
       inherit ((callFlake { pkgs = final; src = ./ghc912X; }).defaultNix) ghc912X;
       inherit ((callFlake { pkgs = final; src = ./ghc913; }).defaultNix) ghc913;
     } // prev.haskell-nix.sources;

lazy-inputs/ghc9121/flake.lock

@@ -0,0 +1,12 @@
+{
+  description = "Lazy Input for Haskell.nix";
+
+  inputs = {
+    ghc9121 = {
+      flake = false;
+      url = "git+https://github.com/stable-haskell/ghc?ref=ghc-9.12.1-iog&submodules=1";
+    };
+  };
+
+  outputs = inputs: inputs;
+}

lazy-inputs/ghc9121/flake.nix

@@ -9,6 +9,7 @@ let
       "9.6" = "9.6.6";
       "9.8" = "9.8.4";
       "9.10" = "9.10.1";
+      "9.12" = "9.12.1";
     };
     gitInputs = {
       ghc912X = "9.12.0";
@@ -911,6 +912,38 @@ in {
 
                 ghc-patches = ghc-patches "9.10.1";
             });
+            ghc9121 = traceWarnOld "9.12" (final.callPackage ../compiler/ghc {
+                extra-passthru = { buildGHC = final.buildPackages.haskell-nix.compiler.ghc9121; };
+
+                bootPkgs = bootPkgsGhc94 // {
+                  ghc = if final.stdenv.buildPlatform != final.stdenv.targetPlatform
+                    then final.buildPackages.buildPackages.haskell-nix.compiler.ghc9121
+                    else final.buildPackages.buildPackages.haskell.compiler.ghc9121
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc9101
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc984
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc983
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc982
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc981
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc966
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc965
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc964
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc963
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc962
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc945
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc944
+                          or final.buildPackages.buildPackages.haskell.compiler.ghc943;
+                };
+                inherit sphinx;
+
+                buildLlvmPackages = final.buildPackages.llvmPackages_15;
+                llvmPackages = final.llvmPackages_15;
+
+                src-spec.file = final.haskell-nix.sources.ghc9121;
+                src-spec.version = "9.12.1";
+                src-spec.needsBooting = true;
+
+                ghc-patches = ghc-patches "9.12.1";
+            });
         } // (__listToAttrs (final.lib.mapAttrsToList (source-name: ver:
           let
             src = final.haskell-nix.sources.${source-name};