discount: fix nix buildHEADmain

Nix doesn't allow network requests while building, so the source for
discount needs to be fetched before the build is initiated.

1 files changed, 21 insertions, 12 deletions

diff --git a/default.nix b/default.nix
index 958091f..14d32d8 100644
--- a/default.nix
+++ b/default.nix
@@ -4,19 +4,28 @@
 , spdlog
 , abseil-cpp }:
 
-llvmPackages.stdenv.mkDerivation rec {
-  pname = "msg";
-  version = "0.1";
+let
+    discount_src = builtins.fetchGit{
+        url = "https://github.com/Orc/discount.git";
+        rev = "c214286f91cb754450121ad1f55a0e9470d3a16c";
+    };
+in llvmPackages.stdenv.mkDerivation rec {
+    pname = "msg";
+    version = "0.1";
 
-  src = ./.;
+    src = ./.;
 
-  nativeBuildInputs = [ cmake ];
+    nativeBuildInputs = [ cmake ];
 
-  meta = with lib; {
-    homepage = "https://github.com/compromyse/msg";
-    description = "Minimal Static Site Generator";
-    licencse = licenses.gpl3;
-    platforms = with platforms; linux ++ darwin;
-    maintainers = [ maintainers.compromyse ];
-  };
+    cmakeFlags = [
+        "-DDISCOUNT_SRC=${discount_src}"
+    ];
+
+    meta = with lib; {
+        homepage = "https://github.com/compromyse/msg";
+        description = "Minimal Static Site Generator";
+        licencse = licenses.gpl3;
+        platforms = with platforms; linux ++ darwin;
+        maintainers = [ maintainers.compromyse ];
+    };
 }