refactoring to more granular flakes and modules

flakes/common/nix_modules/essentials/default.nix

@@ -0,0 +1,55 @@
+{
+  lib,
+  pkgs,
+  ...
+}:
+with lib;
+{
+  environment.systemPackages = with pkgs; [
+    # Essentials
+    vim
+    nano
+    wget
+    curl
+    traceroute
+    dig
+    fastfetch
+    jq
+    bat
+    htop
+    unzip
+    fzf
+    ripgrep
+    lsof
+    killall
+    speedtest-cli
+  ];
+
+  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";
+    ndr = "nix-direnv-reload";
+
+    # general unix
+    date_compact = "date +'%Y%m%d'";
+    date_short = "date +'%Y-%m-%d'";
+    ls = "ls --color -Gah";
+    ll = "ls --color -Galhtr";
+    lss = "du --max-depth=0 -h {.,}* 2>/dev/null | sort -hr";
+    psg = "ps aux | head -n 1 && ps aux | grep -v 'grep' | grep";
+
+    # ripgrep
+    rg = "rg --no-ignore";
+    rgf = "rg --files --glob '!/nix/store/**' 2>/dev/null | rg";
+  };
+
+  environment.shellInit = lib.concatStringsSep "\n\n" [
+    (builtins.readFile ./unix_utils.func.sh)
+    (builtins.readFile ./nixpkg.func.sh)
+  ];
+}

flakes/common/nix_modules/essentials/nixpkg.func.sh

@@ -0,0 +1,13 @@
+# 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
+}

flakes/common/nix_modules/essentials/unix_utils.func.sh

@@ -0,0 +1,65 @@
+# Check if ~/.config/environment exists and source all files within it
+if [ -d "$HOME/.config/environment" ]; then
+  for file in "$HOME/.config/environment/"*; do
+    if [ -r "$file" ]; then
+      if ! . "$file"; then
+        echo "Failed to source $file"
+      fi
+    fi
+  done
+fi
+
+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",$2 } }')
+}
+
+psg_kill() {
+  ps aux | grep -v "grep" | grep "${1}" | awk '{print $2}' | while read -r pid; do
+    if [ -n "${pid}" ]; then
+      echo "killing ${pid}"
+      kill -9 "${pid}" &> /dev/null
+    fi
+  done
+}
+
+psg_terminate() {
+  ps aux | grep -v "grep" | grep "${1}" | awk '{print $2}' | while read -r pid; do
+    if [ -n "${pid}" ]; then
+      echo "Terminating ${pid}"
+      kill -15 "${pid}" &> /dev/null
+    fi
+  done
+}
+
+psg_skill() {
+  ps aux | grep -v "grep" | grep "${1}" | awk '{print $2}' | while read -r pid; do
+    if [ -n "${pid}" ]; then
+      echo "Killing ${pid}"
+      sudo kill -9 "${pid}" &> /dev/null
+    fi
+  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
+}