From 1547c22f29df8c6383fd8f758cc0edae62310f71 Mon Sep 17 00:00:00 2001
From: Andromeda <stroev.andrew@gmail.com>
Date: Fri, 20 Mar 2026 03:46:57 -0400
Subject: [PATCH 1/2] Create Nix flake

---
 flake.lock |  27 ++++++++++++
 flake.nix  | 119 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 146 insertions(+)
 create mode 100644 flake.lock
 create mode 100644 flake.nix

diff --git a/flake.lock b/flake.lock
new file mode 100644
index 000000000..7889e5a84
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,27 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1772963539,
+        "narHash": "sha256-9jVDGZnvCckTGdYT53d/EfznygLskyLQXYwJLKMPsZs=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "9dcb002ca1690658be4a04645215baea8b95f31d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 000000000..ebd20d6db
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,119 @@
+{
+  description = "The GAP package Digraphs";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+  };
+
+  outputs = { self, nixpkgs }:
+    let
+      supportedSystems = [ "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin" ];
+      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+    in
+    {
+      packages = forAllSystems (system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+          gap = pkgs.gap;
+          gaproot = "${gap}/lib/gap";
+        in
+        {
+          default = self.packages.${system}.digraphs;
+
+          digraphs = pkgs.stdenv.mkDerivation {
+            pname = "gap-digraphs";
+            version = "1.14.0";
+
+            src = ./.;
+
+            nativeBuildInputs = with pkgs; [
+              autoconf
+              automake
+              gcc
+              gnumake
+            ];
+
+            buildInputs = [
+              gap
+            ];
+
+            configurePhase = ''
+              runHook preConfigure
+
+              # Generate the configure script
+              mkdir -p gen
+              aclocal -Wall --force
+              autoconf -Wall -f
+              autoheader -Wall -f
+
+              # Run configure, pointing at the GAP root
+              ./configure --with-gaproot=${gaproot}
+
+              runHook postConfigure
+            '';
+
+            buildPhase = ''
+              runHook preBuild
+              make
+              runHook postBuild
+            '';
+
+            installPhase = ''
+              runHook preInstall
+
+              mkdir -p "$out/digraphs"
+
+              # Copy GAP source files
+              cp -r gap "$out/digraphs/"
+              cp -r lib "$out/digraphs/" 2>/dev/null || true
+              cp -r doc "$out/digraphs/" 2>/dev/null || true
+              cp -r data "$out/digraphs/" 2>/dev/null || true
+              cp -r tst "$out/digraphs/" 2>/dev/null || true
+
+              # Copy the compiled shared object
+              cp -r bin "$out/digraphs/"
+
+              # Copy package metadata files
+              cp PackageInfo.g "$out/digraphs/"
+              cp init.g "$out/digraphs/"
+              cp read.g "$out/digraphs/"
+              cp -r makedoc.g "$out/digraphs/" 2>/dev/null || true
+              cp LICENSE "$out/digraphs/" 2>/dev/null || true
+              cp CHANGELOG.md "$out/digraphs/" 2>/dev/null || true
+              cp README.md "$out/digraphs/" 2>/dev/null || true
+
+              runHook postInstall
+            '';
+
+            meta = with pkgs.lib; {
+              description = "GAP methods for graphs, digraphs, and multidigraphs";
+              homepage = "https://digraphs.github.io/Digraphs";
+              license = licenses.gpl3Plus;
+              platforms = platforms.unix;
+            };
+          };
+        }
+      );
+
+      devShells = forAllSystems (system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+          gap = pkgs.gap;
+        in
+        {
+          default = pkgs.mkShell {
+            inputsFrom = [ self.packages.${system}.digraphs ];
+
+            packages = with pkgs; [
+              gap-full
+            ];
+
+            shellHook = ''
+              export GAPROOT="${gap}/lib/gap"
+              echo "\$GAPROOT=$GAPROOT"
+            '';
+          };
+        }
+      );
+    };
+}

From 8c8a9fdd99d8d56126ef97bed3a949ae6e866b24 Mon Sep 17 00:00:00 2001
From: Andromeda <stroev.andrew@gmail.com>
Date: Fri, 20 Mar 2026 03:47:02 -0400
Subject: [PATCH 2/2] Add Nix build output to .gitignore

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index dc35dcb51..04765d017 100644
--- a/.gitignore
+++ b/.gitignore
@@ -61,6 +61,7 @@ main.xml
 Makefile
 manual.lab
 missing
+result
 src/pkgconfig.h.in
 tags
 tst/out/