feat(brew): add command-not-found by default after setup

system_files/shared/usr/lib/systemd/system-preset/01-homebrew.preset

@@ -1,3 +1,4 @@
 enable brew-setup.service
 enable brew-update.timer
 enable brew-upgrade.timer
+enable brew-command-not-found.service

system_files/shared/usr/lib/systemd/system/brew-command-not-found.service

@@ -0,0 +1,18 @@
+[Unit]
+Description=Automatically install brew-command-not-found
+Wants=network-online.target
+After=network-online.target
+ConditionPathIsSymbolicLink=/home/linuxbrew/.linuxbrew/bin/brew
+
+[Service]
+Type=oneshot
+Environment=HOMEBREW_CELLAR=/home/linuxbrew/.linuxbrew/Cellar
+Environment=HOMEBREW_PREFIX=/home/linuxbrew/.linuxbrew
+Environment=HOMEBREW_REPOSITORY=/home/linuxbrew/.linuxbrew/Homebrew
+# Bash is required here or else sudo gets Permission Denied error for some reason
+# Override the user if different UID/User
+ExecStart=/usr/bin/bash -c "/usr/bin/sudo -H -i -u \'#1000\' /usr/libexec/brew-command-not-found.sh"
+ExecStart=/usr/libexec/brew-command-not-found.sh
+
+[Install]
+WantedBy=default.target multi-user.target

system_files/shared/usr/libexec/brew-command-not-found.sh

@@ -0,0 +1,40 @@
+#!/usr/bin/env bash
+# Optionally installs Brew's command-not-found tool if it still isnt installed in the host system
+
+set -euo pipefail
+
+BREW_BINARY=/home/linuxbrew/.linuxbrew/bin/brew
+BREW_ROOT=${HOMEBREW_REPOSITORY:-$($BREW_BINARY --repository)}
+
+if [ ! -f "${BREW_ROOT}/Library/Taps/homebrew/homebrew-command-not-found" ] && [ "$(id -u)" -ne 0 ] ; then
+  if ! $BREW_BINARY -h > /dev/null; then
+    echo "Install Homebrew first!"
+    exit
+  fi
+
+  # This directory could exist without the user having installed command-not-found but then theres something super wrong with their system
+  HOMEBREW_NO_ENV_HINTS=true $BREW_BINARY tap homebrew/command-not-found
+fi
+
+# Fail quietly in the next steps since for some reason the service that is supposted to run this thinks that theyre root when running as $UID
+if [ ! -f "/etc/profile.d/brew-command-not-found.sh" ] ; then
+  touch /etc/profile.d/brew-command-not-found.sh &> /dev/null || exit 0
+  tee /etc/profile.d/brew-command-not-found.sh > /dev/null <<EOF
+# Check for interactive bash or zsh and that we haven't already been sourced
+if [[ -d /home/linuxbrew/.linuxbrew && \$- == *i* && BREW_COMMAND_NOT_FOUND != 1 ]] ; then
+  HB_CNF_HANDLER="${BREW_ROOT}/Library/Taps/homebrew/homebrew-command-not-found/handler.sh"
+  [ -f "\$HB_CNF_HANDLER" ] && source "\$HB_CNF_HANDLER"
+  export BREW_COMMAND_NOT_FOUND=1
+fi
+EOF
+fi
+
+if [ ! -f "/etc/fish/conf.d/homebrew-command-not-found.fish" ] ; then
+  touch /etc/fish/conf.d/brew-command-not-found.fish &> /dev/null || exit 0
+  tee /etc/fish/conf.d/brew-command-not-found.fish > /dev/null <<EOF
+set HB_CNF_HANDLER "${BREW_ROOT}/Library/Taps/homebrew/homebrew-command-not-found/handler.fish"
+if test -f \$HB_CNF_HANDLER
+  source \$HB_CNF_HANDLER
+end
+EOF
+fi