1 files changed, 81 insertions, 0 deletions
diff --git a/pkgs/os-specific/linux/kernel/manual-config.nix b/pkgs/os-specific/linux/kernel/manual-config.nix
new file mode 100644
index 000000000000..8cf8b6502166
--- /dev/null
+++ b/pkgs/os-specific/linux/kernel/manual-config.nix
@@ -0,0 +1,81 @@
+{ stdenv, runCommand }:
+
+{ version, modDirVersion ? version, src, patches ? [], config }:
+
+with stdenv.lib;
+
+let
+
+  # Function to parse the config file to get the features supported
+  readFeatures = config:
+    let
+      # !!! Original causes recursion too deep, need to import from derivation
+      # linesWithComments = splitString "\n" (builtins.readFile config);
+      lines = import "${runCommand "lines.nix" {} ''
+        echo "[" >> $out
+        while read line; do
+            if [ -n "$line" ] && [ `expr index "$line" "#"` -ne 1 ]; then
+                echo "${"''"}" >> $out
+                echo $(echo $line | sed "s@${"''"}@\$\{\"${"''"}\"}@g")"${"''"}" >> $out
+            fi
+        done < ${config} 
+        echo "]" >> $out
+      ''}";
+
+      nvpairs = map (s: let split = splitString "=" s; fst = head split; in {
+        name = substring (stringLength "CONFIG_") (stringLength fst) fst;
+        value = head (tail split);
+      }) lines;
+
+      configAttrs = listToAttrs nvpairs;
+
+      getValue = option:
+        if hasAttr option configAttrs then getAttr option configAttrs else null;
+
+      isYes = option: (getValue option) == "y";
+    in
+
+    {
+      modular = isYes "MODULES";
+    };
+
+  features = readFeatures config;
+
+in
+
+stdenv.mkDerivation ({
+  name = "linux-${version}";
+
+  enableParallelBuilding = true;
+
+  passthru = {
+    inherit version modDirVersion features;
+  };
+
+  inherit patches src;
+
+  postPatch = ''
+    for mf in $(find -name Makefile); do
+        echo "stripping FHS paths in \`$mf'..."
+        sed -i "$mf" -e 's|/usr/bin/||g ; s|/bin/||g'
+    done
+  '';
+
+  configurePhase = ''
+    runHook preConfigure
+    ln -sv ${config} .config
+    make oldconfig
+    runHook postConfigure
+  '';
+
+  INSTALL_PATH = "$out";
+} // optionalAttrs features.modular {
+  MODLIB = "$out/lib/modules/${modDirVersion}";
+
+  INSTALL_MOD_STRIP = "1";
+
+  postInstall = ''
+    make modules_install $makeFlags "$\{makeFlagsArray[@]}" \
+      $installFlags "$\{installFlagsArray[@]}"
+  '';
+})