{ writeText, lib, stdenv, fetchurl, ncurses }:

let
  version = "0.6.1";
in
stdenv.mkDerivation rec {
  pname = "bwm-ng";
  inherit version;

  src = fetchurl {
    url = "https://www.gropp.org/bwm-ng/${pname}-${version}.tar.gz";
    sha256 = "1w0dwpjjm9pqi613i8glxrgca3rdyqyp3xydzagzr5ndc34z6z02";
  };

  buildInputs = [ ncurses ];

  # gcc7 has some issues with inline functions
  patches = [
    (writeText "gcc7.patch"
    ''
    --- a/src/bwm-ng.c
    +++ b/src/bwm-ng.c
    @@ -27,5 +27,5 @@
     /* handle interrupt signal */
     void sigint(int sig) FUNCATTR_NORETURN;
    -inline void init(void);
    +static inline void init(void);

     /* clear stuff and exit */
    --- a/src/options.c
    +++ b/src/options.c
    @@ -35,5 +35,5 @@
     inline int str2output_type(char *optarg);
     #endif
    -inline int str2out_method(char *optarg);
    +static inline int str2out_method(char *optarg);
     inline int str2in_method(char *optarg);

    '')
  ];


  # This code uses inline in the gnu89 sense: see http://clang.llvm.org/compatibility.html#inline
  NIX_CFLAGS_COMPILE = lib.optionalString stdenv.cc.isClang "-std=gnu89";

  meta = with lib; {
    description = "A small and simple console-based live network and disk io bandwidth monitor";
    homepage = "http://www.gropp.org/?id=projects&sub=bwm-ng";
    license = licenses.gpl2;
    platforms = platforms.unix;

    longDescription = ''
        Features

            supports /proc/net/dev, netstat, getifaddr, sysctl, kstat, /proc/diskstats /proc/partitions, IOKit, devstat and libstatgrab
            unlimited number of interfaces/devices supported
            interfaces/devices are added or removed dynamically from list
            white-/blacklist of interfaces/devices
            output of KB/s, Kb/s, packets, errors, average, max and total sum
            output in curses, plain console, CSV or HTML
            configfile

        Short list of changes since 0.5 (for full list read changelog):

            curses2 output, a nice bar chart
            disk input for bsd/macosx/linux/solaris
            win32 network bandwidth support
            moved to autotools
            alot fixes

        Info
        This was influenced by the old bwm util written by Barney (barney@freewill.tzo.com) which had some issues with faster interfaces and was very simple. Since i had almost all code done anyway for other projects, i decided to create my own version.

        I actually don't know if netstat input is useful at all. I saw this elsewhere, so i added it. Its target is "netstat 1.42 (2001-04-15)" linux or Free/Open/netBSD. If there are other formats i would be happy to add them.

        (from homepage)
    '';
  };
}