{ lib
, stdenv
, fetchFromGitHub
, installShellFiles
, makeWrapper
, coreutils
, openssh
, gnupg
, perl
, procps
, gnugrep
, gawk
, findutils
, gnused
}:

stdenv.mkDerivation rec {
  pname = "keychain";
  version = "2.8.5";

  src = fetchFromGitHub {
    owner = "funtoo";
    repo = "keychain";
    rev = version;
    sha256 = "1bkjlg0a2bbdjhwp37ci1rwikvrl4s3xlbf2jq2z4azc96dr83mj";
  };

  nativeBuildInputs = [ installShellFiles makeWrapper ];
  buildInputs = [ perl ];

  installPhase = ''
    mkdir -p $out/bin
    cp keychain $out/bin/keychain
    installManPage keychain.1
    wrapProgram $out/bin/keychain \
      --prefix PATH ":" "${lib.makeBinPath [ coreutils findutils gawk gnupg gnugrep gnused openssh procps ]}" \
  '';

  meta = with lib; {
    description = "Keychain management tool";
    longDescription = ''
      Keychain helps you to manage SSH and GPG keys in a convenient and secure
      manner. It acts as a frontend to ssh-agent and ssh-add, but allows you
      to easily have one long running ssh-agent process per system, rather
      than the norm of one ssh-agent per login session.

      This dramatically reduces the number of times you need to enter your
      passphrase. With keychain, you only need to enter a passphrase once
      every time your local machine is rebooted. Keychain also makes it easy
      for remote cron jobs to securely "hook in" to a long-running ssh-agent
      process, allowing your scripts to take advantage of key-based logins.
    '';
    homepage = "https://www.funtoo.org/Keychain";
    license = licenses.gpl2Only;
    platforms = platforms.unix;
    maintainers = with maintainers; [ sigma ];
    mainProgram = "keychain";
  };
}
