3 files changed, 105 insertions, 0 deletions

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4d77fea
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+result-bin
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..2ed3944
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,52 @@
+{
+  "nodes": {
+    "gnucobol-3_1_2-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1608725098,
+        "narHash": "sha256-EUvc4MFhJJ3VduloFHfCMELAMkdQ4CQs9b64zlTUdzo=",
+        "type": "tarball",
+        "url": "https://ftp.gnu.org/gnu/gnucobol/gnucobol-3.1.2.tar.xz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://ftp.gnu.org/gnu/gnucobol/gnucobol-3.1.2.tar.xz"
+      }
+    },
+    "gnucobol-3_2-src": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1690569738,
+        "narHash": "sha256-zYnJEoddmKl1Ds2Kg1Kz9NUjfuu/x5o7wDQmMJy/Jfc=",
+        "type": "tarball",
+        "url": "https://ftp.gnu.org/gnu/gnucobol/gnucobol-3.2.tar.xz"
+      },
+      "original": {
+        "type": "tarball",
+        "url": "https://ftp.gnu.org/gnu/gnucobol/gnucobol-3.2.tar.xz"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1710534455,
+        "narHash": "sha256-huQT4Xs0y4EeFKn2BTBVYgEwJSv8SDlm82uWgMnCMmI=",
+        "path": "/nix/store/is9gmr40ay4smysc2dica2g8dgwxnp5d-source",
+        "rev": "9af9c1c87ed3e3ed271934cb896e0cdd33dae212",
+        "type": "path"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "gnucobol-3_1_2-src": "gnucobol-3_1_2-src",
+        "gnucobol-3_2-src": "gnucobol-3_2-src",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..d53099c
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,52 @@
+# mostly lifted from https://github.com/xddxdd/nur-packages, converted into a standalone flake
+{
+  description = "GNU cobol compiler";
+
+  inputs = {
+    gnucobol-3_2-src = {
+      url = "https://ftp.gnu.org/gnu/gnucobol/gnucobol-3.2.tar.xz";
+      flake = false;
+    };
+    gnucobol-3_1_2-src = {
+      url = "https://ftp.gnu.org/gnu/gnucobol/gnucobol-3.1.2.tar.xz";
+      flake = false;
+    };
+  };
+
+  outputs =
+    { self
+    , nixpkgs
+    , gnucobol-3_2-src
+    , gnucobol-3_1_2-src
+    }:
+    let
+      supportedSystems = [ "x86_64-linux" ];
+      forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
+      nixpkgsFor = forAllSystems (system: import nixpkgs {
+        inherit system;
+        overlays = [ self.overlays.default ];
+      });
+    in
+    {
+      overlays.default = final: prev: {
+        gnucobol-3_1_2 =
+          final.gnu-cobol.overrideAttrs {
+            src = gnucobol-3_1_2-src;
+            doInstallCheck = false;
+          };
+
+        gnucobol-3_2 =
+          final.gnu-cobol.overrideAttrs {
+            src = gnucobol-3_2-src;
+            doInstallCheck = false;
+          };
+      };
+
+      packages = forAllSystems (system: {
+        inherit (nixpkgsFor."${system}") gnucobol-3_1_2 gnucobol-3_2;
+      });
+
+      defaultPackage = forAllSystems (system: self.packages."${system}".gnucobol-3_2);
+    };
+}
+