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f088ce558f
xjobs reads job descriptions line by line and executes them in parallel. Signed-off-by: Sirio Balmelli <sirio@b-ad.ch> Co-authored-by: legendofmiracles <30902201+legendofmiracles@users.noreply.github.com> Co-authored-by: Sandro <sandro.jaeckel@gmail.com>
66 lines
2 KiB
Nix
66 lines
2 KiB
Nix
{ lib, stdenv, fetchurl
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, flex, installShellFiles, ncurses, which
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}:
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stdenv.mkDerivation rec {
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pname = "xjobs";
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version = "20200726";
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src = fetchurl {
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url = "mirror://sourceforge//xjobs/files/${pname}-${version}.tgz";
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sha256 = "0ay6gn43pnm7r1jamwgpycl67bjg5n87ncl27jb01w2x6x70z0i3";
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};
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nativeBuildInputs = [
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flex
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installShellFiles
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which
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];
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buildInputs = [
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ncurses
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];
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checkPhase = ''
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runHook preCheck
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./${pname} -V
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runHook postCheck
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'';
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installPhase = ''
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runHook preInstall
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mkdir -p $out/{bin,etc}
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install -m755 ${pname} $out/bin/${pname}
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install -m644 ${pname}.rc $out/etc/${pname}.rc
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installManPage ${pname}.1
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runHook postInstall
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'';
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meta = with lib; {
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description = "A program which reads job descriptions line by line and executes them in parallel";
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homepage = "https://www.maier-komor.de/xjobs.html";
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license = licenses.gpl2Plus;
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platforms = platforms.all;
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maintainers = [ maintainers.siriobalmelli ];
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longDescription = ''
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xjobs reads job descriptions line by line and executes them in parallel.
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It limits the number of parallel executing jobs and starts new jobs when jobs finish.
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Therefore, it combines the arguments from every input line with the utility
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and arguments given on the command line.
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If no utility is given as an argument to xjobs,
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then the first argument on every job line will be used as utility.
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To execute utility xjobs searches the directories given in the PATH environment variable
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and uses the first file found in these directories.
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xjobs is most useful on multi-processor/core machines when one needs to execute
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several time consuming command several that could possibly be run in parallel.
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With xjobs this can be achieved easily, and it is possible to limit the load
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of the machine to a useful value.
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It works similar to xargs, but starts several processes simultaneously
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and gives only one line of arguments to each utility call.
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'';
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};
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}
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