Use Savannah for added emacs-igc

Previously using emacs-mirror due to broken Savannah.

flake.nix

@@ -75,6 +75,7 @@
                 inherit (pkgs) emacs-unstable-pgtk;
                 inherit (pkgs) emacs-git emacs-git-nox;
                 inherit (pkgs) emacs-pgtk;
+                inherit (pkgs) emacs-igc emacs-igc-pgtk;
               };
 
               packages = mkEmacsSet pkgs.emacs;

overlays/emacs.nix

@@ -146,6 +146,38 @@ let
                               };
                             });
 
+  emacs-igc = let base = (mkGitEmacs "emacs-igc" ../repos/emacs/emacs-feature_igc.json) { };
+                  emacs = emacs-igc;
+              in
+                base.overrideAttrs (
+                  oa: {
+                    buildInputs = oa.buildInputs ++ [ super.mps ];
+                    configureFlags = oa.configureFlags ++ [ "--with-mps=yes" ];
+                    patches = oa.patches ++ [
+                      # XXX: #318
+                      ./bytecomp-revert.patch
+                    ];
+                    passthru = oa.passthru // {
+                      pkgs = oa.passthru.pkgs.overrideScope (eself: esuper: { inherit emacs; });
+                    };
+                  });
+
+  emacs-igc-pgtk = let base = (mkGitEmacs "emacs-igc-pgtk" ../repos/emacs/emacs-feature_igc.json) { withPgtk = true; };
+                       emacs = emacs-igc-pgtk;
+                   in
+                     base.overrideAttrs (
+                       oa: {
+                         buildInputs = oa.buildInputs ++ [ super.mps ];
+                         configureFlags = oa.configureFlags ++ [ "--with-mps=yes" ];
+                         patches = oa.patches ++ [
+                           # XXX: #318
+                           ./bytecomp-revert.patch
+                         ];
+                         passthru = oa.passthru // {
+                           pkgs = oa.passthru.pkgs.overrideScope (eself: esuper: { inherit emacs; });
+                         };
+                       });
+
   emacs-lsp = (mkGitEmacs "emacs-lsp" ../repos/emacs/emacs-lsp.json) { withTreeSitter = false; };
 
   commercial-emacs = (mkGitEmacs "commercial-emacs" ../repos/emacs/commercial-emacs-commercial-emacs.json) {
@@ -195,6 +227,8 @@ in
 
   inherit commercial-emacs;
 
+  inherit emacs-igc emacs-igc-pgtk;
+
   emacsWithPackagesFromUsePackage = import ../elisp.nix { pkgs = self; };
 
   emacsWithPackagesFromPackageRequires = import ../packreq.nix { pkgs = self; };

repos/emacs/emacs-feature_igc.json

@@ -0,0 +1 @@
+{"type": "savannah", "repo": "emacs", "rev": "7146d10b4625043d8e36dd91ff1574568158dc55", "sha256": "0pf3q756iwpg2dssdxanv8w84rid6yzqvysdaii3g1gb2ffr00dg", "version": "20250123.0"}

repos/emacs/update

@@ -50,9 +50,9 @@ function update_release() {
     echo "{\"type\": \"savannah\", \"repo\": \"emacs\", \"rev\": \"${tag}\", \"sha256\": \"${digest}\", \"version\": \"${version_number}\"}" > emacs-unstable.json
 }
 
-# https://github.com/nix-community/emacs-overlay/issues/460
-# update_savannah_branch master
-# update_release
+update_savannah_branch master
+update_savannah_branch feature/igc
+update_release
 update_github_repo emacs-lsp emacs json-rpc lsp
 update_github_repo commercial-emacs commercial-emacs master commercial-emacs