feat: factor out and spread admin essentials package

configs/admin-essentials.nix

@@ -0,0 +1,87 @@
+{
+  pkgs,
+  niveumPackages,
+  ...
+}: {
+  environment.systemPackages = [
+    pkgs.htop
+    pkgs.w3m
+    pkgs.wget
+    # ARCHIVE TOOLS
+    pkgs.unzip
+    pkgs.unrar
+    pkgs.p7zip
+    pkgs.zip
+    # MONITORS
+    pkgs.iotop # I/O load monitor
+    pkgs.iftop # interface bandwidth monitor
+    pkgs.lsof # list open files
+    pkgs.psmisc # for killall, pstree
+    # SHELL
+    pkgs.fd # better find
+    pkgs.tree
+    pkgs.parallel # for parallel, since moreutils shadows task spooler
+    pkgs.ripgrep # better grep
+    pkgs.rlwrap
+    pkgs.progress # display progress bars for pipes
+    pkgs.file # determine file type
+    pkgs.gdu # ncurses disk usage (ncdu is broken)
+    pkgs.rmlint # remove duplicate files
+    pkgs.jq # json toolkit
+    pkgs.jless # less(1) for json
+    pkgs.fq # toolkit for yaml, xml and binaries
+    pkgs.bc # calculator
+    pkgs.pari # gp -- better calculator
+    pkgs.ts
+    niveumPackages.vimv
+    niveumPackages.vg
+    niveumPackages.fkill
+    niveumPackages.cyberlocker-tools
+    niveumPackages.untilport
+    niveumPackages.kpaste
+    # HARDWARE
+    pkgs.usbutils # for lsusb
+    pkgs.pciutils # for lspci
+    pkgs.lshw # for lshw
+  ];
+
+  environment.shellAliases = let
+    take = pkgs.writers.writeDash "take" ''
+      mkdir "$1" && cd "$1"
+    '';
+    cdt = pkgs.writers.writeDash "cdt" ''
+      cd "$(mktemp -d)"
+      pwd
+    '';
+    wcd = pkgs.writers.writeDash "wcd" ''
+      cd "$(readlink "$(${pkgs.which}/bin/which --skip-alias "$1")" | xargs dirname)/.."
+    '';
+    where = pkgs.writers.writeDash "where" ''
+      readlink "$(${pkgs.which}/bin/which --skip-alias "$1")" | xargs dirname
+    '';
+  in {
+    "ß" = "${pkgs.util-linux}/bin/setsid";
+    nixi = "nix repl '<nixpkgs>'";
+    take = "source ${take}";
+
+    wcd = "source ${wcd}";
+    where = "source ${where}";
+    # temporary files and directories
+    cdt = "source ${cdt}";
+    vit = "$EDITOR $(mktemp)";
+    # file safety
+    mv = "mv --interactive";
+    rm = "rm --interactive";
+    cp = "cp --interactive";
+    # colours
+    cat = "${pkgs.bat}/bin/bat --theme=ansi --style=plain";
+    l = "ls --color=auto --time-style=long-iso --almost-all";
+    ls = "ls --color=auto --time-style=long-iso";
+    ll = "ls --color=auto --time-style=long-iso -l";
+    la = "ls --color=auto --time-style=long-iso --almost-all -l";
+    ip = "${pkgs.iproute2}/bin/ip -c";
+    # systemd
+    s = "${pkgs.systemd}/bin/systemctl";
+    us = "${pkgs.systemd}/bin/systemctl --user";
+  };
+}