initial commit

nixcaps.nix

@@ -0,0 +1,62 @@
+{
+  qmk,
+  fetchFromGitHub,
+  stdenv,
+  lib,
+}:
+rec {
+  qmk_firmware = fetchFromGitHub {
+    owner = "qmk";
+    repo = "qmk_firmware";
+    rev = "0.30.3";
+    sha256 = "sha256-lM5B9xl7sSxGhI/fbS0ys22t5oVUp8aMLI4pzICEKHk=";
+    fetchSubmodules = true;
+  };
+  compile =
+    {
+      keyboard,
+      src,
+      variant ? null,
+      flash ? null,
+      target ? "fw",
+      ...
+    }:
+    let
+      buildDir = "build";
+      keyboardDir = "keyboards/${keyboard}";
+      keyboardVariant = if builtins.isNull variant then "${keyboard}" else "${keyboard}/${variant}";
+      keymapName = "nixcaps";
+      keymapDir = "${keyboardDir}/keymaps/${keymapName}";
+    in
+    stdenv.mkDerivation {
+      name = "nixcaps-compile";
+      src = qmk_firmware;
+      buildInputs = [ qmk ];
+      postPatch = ''
+        mkdir -p ${keymapDir}
+        cp -r ${src}/* ${keymapDir}/
+      '';
+      buildPhase = ''
+        qmk compile \
+          --env SKIP_GIT=true \
+          --env BUILD_DIR=${buildDir} \
+          --env TARGET=${target} \
+          --keyboard ${keyboardVariant} \
+          --keymap ${keymapName}
+      '';
+      installPhase = ''
+        mkdir -p $out/bin
+        cp ${buildDir}/*.{hex,bin,elf,dfu,uf2,eep} $out/bin
+
+        ${lib.optionalString (!builtins.isNull flash) ''
+          cat > $out/bin/flash <<EOF
+          #!/bin/sh
+          set -e
+          ${flash (placeholder "out" + "/bin/${target}")}
+          EOF
+          chmod +x $out/bin/flash
+        ''}
+      '';
+      dontFixup = true;
+    };
+}