mbpfan: new package

Daemon that uses input from coretemp module and sets the fan speed using
the applesmc module

pkgs/os-specific/linux/mbpfan/default.nix

···
+{ stdenv, lib, fetchFromGitHub, gnugrep, kmod }:
+
+stdenv.mkDerivation rec {
+  name = "mbpfan-${version}";
+  version = "1.9.0";
+  src = fetchFromGitHub {
+    owner = "dgraziotin";
+    repo = "mbpfan";
+    rev = "v${version}";
+    sha256 = "15nm1d0a0c0lzxqngrpn2qpsydsmglnn6d20djl7brpsq26j24h9";
+  };
+  patches = [ ./fixes.patch ];
+  postPatch = ''
+    substituteInPlace src/main.c \
+      --replace '@GREP@' '${gnugrep}/bin/grep' \
+      --replace '@LSMOD@' '${kmod}/bin/lsmod'
+  '';
+  installPhase = ''
+    mkdir -p $out/bin $out/etc
+    cp bin/mbpfan $out/bin
+    cp mbpfan.conf $out/etc
+  '';
+  meta = with lib; {
+    description = "Daemon that uses input from coretemp module and sets the fan speed using the applesmc module";
+    homepage = "https://github.com/dgraziotin/mbpfan";
+    license = licenses.gpl3;
+    platforms = platforms.linux;
+    maintainers = with maintainers; [ cstrahan ];
+  };
+}

pkgs/os-specific/linux/mbpfan/fixes.patch

···
+diff --git a/src/main.c b/src/main.c
+index e8af708..6cfee17 100644
+--- a/src/main.c
++++ b/src/main.c
+@@ -71,7 +71,7 @@ void check_requirements()
+       * Check for coretemp and applesmc modules
+       * Credits: -http://stackoverflow.com/questions/12978794
+       */
+-    FILE *fd = popen("lsmod | grep coretemp", "r");
++    FILE *fd = popen("@LSMOD@ | @GREP@ coretemp", "r");
+     char buf[16];
+ 
+     if (!(fread (buf, 1, sizeof (buf), fd) > 0)) {
+@@ -87,7 +87,7 @@ void check_requirements()
+ 
+     pclose(fd);
+ 
+-    fd = popen("lsmod | grep applesmc", "r");
++    fd = popen("@LSMOD@ | @GREP@ applesmc", "r");
+ 
+     if (!(fread (buf, 1, sizeof (buf), fd) > 0)) {
+         DIR* dir = opendir(APPLESMC_PATH);
+@@ -145,4 +145,4 @@ int main(int argc, char *argv[])
+     void (*fan_control)() = mbpfan;
+     go_daemon(fan_control);
+     exit(EXIT_SUCCESS);
+-}
+\ No newline at end of file
++}

pkgs/top-level/all-packages.nix

···
 
   lvm2 = callPackage ../os-specific/linux/lvm2 { };
 
+  mbpfan = callPackage ../os-specific/linux/mbpfan { };
+
   mdadm = callPackage ../os-specific/linux/mdadm { };
 
   mingetty = callPackage ../os-specific/linux/mingetty { };