[#155] cross compilation

Signed-off-by: Alexander Diemand <codieplusplus@apax.net>

iohk-monitoring.cabal

@@ -81,8 +81,6 @@ library
                        containers,
                        contravariant,
                        directory,
-                       ekg,
-                       ekg-core,
                        filepath,
                        katip < 0.8,
                        lens,
@@ -95,11 +93,15 @@ library
                        text,
                        time,
                        time-units,
-                       threepenny-gui,
                        transformers,
                        unordered-containers,
                        vector,
                        yaml, libyaml < 0.1.1
+  if !flag(disable-ekg)
+     build-depends:    ekg,
+                       ekg-core
+  if !flag(disable-gui)
+     build-depends:    threepenny-gui
   if os(windows)
      build-depends:    Win32
   else

nix/.stack.nix/iohk-monitoring.nix

@@ -20,7 +20,7 @@
       };
     components = {
       "library" = {
-        depends = [
+        depends = (([
           (hsPkgs.base)
           (hsPkgs.aeson)
           (hsPkgs.array)
@@ -33,8 +33,6 @@
           (hsPkgs.containers)
           (hsPkgs.contravariant)
           (hsPkgs.directory)
-          (hsPkgs.ekg)
-          (hsPkgs.ekg-core)
           (hsPkgs.filepath)
           (hsPkgs.katip)
           (hsPkgs.lens)
@@ -47,13 +45,15 @@
           (hsPkgs.text)
           (hsPkgs.time)
           (hsPkgs.time-units)
-          (hsPkgs.threepenny-gui)
           (hsPkgs.transformers)
           (hsPkgs.unordered-containers)
           (hsPkgs.vector)
           (hsPkgs.yaml)
           (hsPkgs.libyaml)
-          ] ++ (if system.isWindows
+          ] ++ (pkgs.lib).optionals (!flags.disable-ekg) [
+          (hsPkgs.ekg)
+          (hsPkgs.ekg-core)
+          ]) ++ (pkgs.lib).optional (!flags.disable-gui) (hsPkgs.threepenny-gui)) ++ (if system.isWindows
           then [ (hsPkgs.Win32) ]
           else [ (hsPkgs.unix) ]);
         };

shell.nix

@@ -7,6 +7,7 @@ stdenv.mkDerivation {
                         ghc
                         cabal2nix
                         stack
+                        numactl
                       ];
   buildInputs = [
                 ];

src/Cardano/BM/Rotator.lhs

@@ -34,14 +34,13 @@ import           Data.Time (UTCTime, addUTCTime, diffUTCTime, getCurrentTime,
                      parseTimeM)
 import           Data.Time.Format (defaultTimeLocale, formatTime)
 import           System.Directory (listDirectory, removeFile)
-import           System.FilePath ((</>), takeDirectory)
+import           System.FilePath ((</>), takeDirectory, takeFileName)
 import           System.IO (BufferMode (LineBuffering), Handle,
                      IOMode (AppendMode, WriteMode), hFileSize, hSetBuffering,
                      openFile, stdout)
 
 #ifdef POSIX
 import           System.Directory (createFileLink)
-import           System.FilePath (takeFileName)
 #endif
 
 import           Cardano.BM.Data.Rotation (RotationParameters (..))
@@ -84,7 +83,7 @@ evalRotator rotation filename = do
     -- restrict symbolic links only for unix-like OS
     let symLinkPath = filename
     let logfilePath = takeFileName fpath
-    -- delete a symlink if already exists and create a new
+    -- delete a symlink if it already exists and create a new
     -- one that points to the correct file.
     (removeFile symLinkPath)
         `catchIO` (prtoutException ("cannot remove symlink: " ++ symLinkPath))