Getting more idomatic nix modules setup... will tackle users dir later

modules/shell/common.nix

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+{
+  config,
+  lib,
+  pkgs,
+  settings,
+  ...
+}:
+with lib;
+let
+  name = "shell_common";
+  cfg = config.mods.${name};
+in
+{
+  options = {
+    mods.${name} = {
+      enable = mkEnableOption (lib.mdDoc "Enable ${name}");
+    };
+  };
+
+  config = mkIf cfg.enable {
+    networking = {
+      hostName = settings.system.hostname;
+      extraHosts = ''
+        127.0.0.1 local.belljm.com
+        127.0.0.1 n0.local.belljm.com
+        127.0.0.1 n1.local.belljm.com
+        127.0.0.1 n2.local.belljm.com
+        127.0.0.1 n3.local.belljm.com
+        127.0.0.1 n4.local.belljm.com
+      '';
+      # Use nftables not iptables
+      nftables.enable = true;
+      firewall.enable = true;
+    };
+
+    environment.systemPackages = with pkgs; [
+      # Basics
+      vim
+      nano
+      wget
+      curl
+      fastfetch
+      bat
+      htop
+      unzip
+      git
+      fzf
+      ripgrep
+      lsof
+      killall
+      hdparm
+      speedtest-cli
+      ffmpeg-full
+    ];
+
+    environment.shellAliases = {
+      n = "nvim";
+      nn = "nvim --headless '+SessionDelete' +qa > /dev/null 2>&1 && nvim";
+      bat = "bat --theme Coldark-Dark";
+      cat = "bat --pager=never -p";
+      # TODO this may not be needed now that I am using `nh` clean mode (see /hosts/_common/configuration.nix#programs.nh)
+      nix-boot-clean = "find '/boot/loader/entries' -type f ! -name 'windows.conf' | head -n -4 | xargs -I {} rm {}; nix store gc; nixos-rebuild boot; echo; df";
+
+      # general unix
+      date_compact = "date +'%Y%m%d'";
+      date_short = "date +'%Y-%m-%d'";
+      ls = "ls --color -Ga";
+      ll = "ls --color -Gal";
+      lss = "du --max-depth=0 -h * 2>/dev/null";
+      psg = "ps aux | head -n 1 && ps aux | grep -v 'grep' | grep";
+      cl = "clear";
+
+      # git
+      stash = "git stash";
+      pop = "git stash pop";
+      branch = "git checkout -b";
+      status = "git status";
+      diff = "git diff";
+      branches = "git branch -a";
+      gcam = "git commit -a -m";
+      stashes = "git stash list";
+
+      # ripgrep
+      rg = "rg --no-ignore";
+      rgf = "rg --files 2>/dev/null | rg";
+    };
+
+    environment.shellInit = builtins.readFile ./common.sh;
+  };
+}

modules/shell/common.sh

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+# basics
+htop_psg () {
+  htop -p $(psg $1 | awk '{r=r s $2;s=","} END{print r}')
+}
+
+htop_pid () {
+  htop -p $(ps -ef | awk -v proc=$1 '$3 == proc { cnt++;if (cnt == 1) { printf "%s",$2 } else { printf ",%s",$2 } }')
+}
+
+kill_psg() {
+  PIDS=$(ps aux | grep -v "grep" | grep ${1} | awk '{print $2}')
+  echo Killing ${PIDS}
+  for pid in ${PIDS}; do
+    kill -9 ${pid} &> /dev/null
+  done
+}
+
+term_psg() {
+  PIDS=$(ps aux | grep -v "grep" | grep ${1} | awk '{print $2}')
+  echo Terminating ${PIDS}
+  for pid in ${PIDS}; do
+    kill -15 ${pid} &> /dev/null
+  done
+}
+
+skill_psg() {
+  PIDS=$(ps aux | grep -v "grep" | grep ${1} | awk '{print $2}')
+  echo Quitting ${PIDS}
+  for pid in ${PIDS}; do
+    sudo kill -9 ${pid} &> /dev/null
+  done;
+}
+
+mail_clear() {
+  : > /var/mail/$USER
+}
+
+speedtest_fs () {
+  dir=$(pwd)
+  drive=$(df -h ${dir} | awk 'NR==2 {print $1}')
+  echo Testing read speeds on drive ${drive}
+  sudo hdparm -Tt ${drive}
+  test_file=$(date +%u%m%d)
+  test_file="${dir}/speedtest_fs_${test_file}"
+  echo
+  echo Testing write speeds into test file: ${test_file}
+  dd if=/dev/zero of=${test_file} bs=8k count=10k; rm -f ${test_file}
+}
+
+speedtest_internet () {
+  speedtest-cli
+}
+
+# git
+getdefault () {
+  git remote show origin | grep "HEAD branch" | sed 's/.*: //'
+}
+
+master () {
+  git stash
+  git checkout $(getdefault)
+  pull
+}
+
+mp () {
+  master
+  prunel
+}
+
+pullmaster () {
+  git pull origin $(getdefault)
+}
+
+push () {
+  B=$(git branch | sed -n -e 's/^\* \(.*\)/\1/p')
+  git pull origin $B
+  git push origin $B --no-verify
+}
+
+pull () {
+  git fetch
+  B=$(git branch | sed -n -e 's/^\* \(.*\)/\1/p')
+  git pull origin $B
+}
+
+forcepush () {
+  B=$(git branch | sed -n -e 's/^\* \(.*\)/\1/p')
+  git push origin $B --force
+}
+
+remote_branches () {
+  git branch -a | grep 'remotes' | grep -v -E '.*(HEAD|${DEFAULT})' | cut -d'/' -f 3-
+}
+
+local_branches () {
+  git branch -a | grep -v 'remotes' | grep -v -E '.*(HEAD|${DEFAULT})' | grep -v '^*' |  cut -d' ' -f 3-
+}
+
+prunel () {
+  git fetch
+  git remote prune origin
+
+  for local in $(local_branches); do
+    in=false
+    for remote in $(remote_branches); do
+      if [[ ${local} = ${remote} ]]; then
+        in=true
+      fi
+    done;
+    if [[ $in = 'false' ]]; then
+      git branch -D ${local}
+    else
+      echo 'Skipping branch '${local}
+    fi
+  done;
+}
+
+checkout () {
+  git fetch
+  git checkout $1
+  pull
+}
+
+from_master () {
+  git checkout $(getdefault) $@
+}
+
+
+# nix
+alias nixpkgs=nixpkg
+nixpkg () {
+  if [ $# -eq 0 ]; then
+    echo "Error: No arguments provided. Please specify at least one package."
+    return 1
+  fi
+  cmd="nix shell"
+  for pkg in "$@"; do
+    cmd="$cmd \"nixpkgs#$pkg\""
+  done
+  eval $cmd
+}