chore(zsh): various tweaks to zsh env setup and helpers

launch_agents/me.jimeh.logrotate.plist

@@ -17,7 +17,7 @@
     <key>EnvironmentVariables</key>
     <dict>
       <key>PATH</key>
-      <string>/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/sbin</string>
+      <string>/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/sbin:/opt/homebrew/bin:/opt/homebrew/sbin</string>
     </dict>
     <key>StartCalendarInterval</key>
     <dict>

powconfig

@@ -1,3 +1,3 @@
 export POW_DST_PORT=88
 export HOME=~
-export PATH="$HOME/.rbenv/shims:$HOME/.rbenv/bin:/usr/local/bin:$PATH"
+export PATH="$HOME/.rbenv/shims:$HOME/.rbenv/bin:/usr/local/bin:/opt/homebrew/bin:$PATH"

zsh/google-cloud.zsh

@@ -2,10 +2,6 @@
 # Google Cloud SDK setup.
 #
 
-if [ -f '/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/path.zsh.inc' ]; then
-  source '/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/path.zsh.inc'
-fi
-
 # Lazy load gcloud shell completion on first use.
 if command-exists gcloud; then
   _python_argcomplete() {
@@ -17,8 +13,8 @@ if command-exists gcloud; then
 
   load-gcloud-completion() {
     unset -f load-gcloud-completion _python_argcomplete
-    if [ -f '/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/completion.zsh.inc' ]; then
-      source '/usr/local/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/completion.zsh.inc'
+    if [ -n "$HOMEBREW_PREFIX" ]; then
+      source-if-exists "${HOMEBREW_PREFIX}/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/completion.zsh.inc"
     fi
   }
 fi

zsh/kubernetes.zsh

@@ -23,11 +23,13 @@ if command-exists kubectl; then
   }
   _setup-kubectl-completion
 
+  if command-exists brew-prefix; then
     switch() {
       unset -f switch
-    source "$(brew --prefix switch)/switch.sh"
+      source "$(brew-prefix switch)/switch.sh"
       switch "$@"
     }
+  fi
 
   export KREW_ROOT="$HOME/.krew"
   path_append "${KREW_ROOT}/bin"

zshenv

@@ -68,6 +68,12 @@ command-exists() {
   return $?
 }
 
+source-if-exists() {
+  if [ -f "$1" ]; then
+    source "$1"
+  fi
+}
+
 # ==============================================================================
 # System Environment Setup
 # ==============================================================================
@@ -126,6 +132,26 @@ if [ -f "/opt/homebrew/bin/brew" ]; then
   eval "$(/opt/homebrew/bin/brew shellenv)"
 fi
 
+if command-exists brew; then
+  typeset -A _brew_prefix_cache
+
+  brew-prefix() {
+    local package="$1"
+
+    if [[ -z "$package" ]]; then
+      package="__none__"
+    fi
+
+    if [[ -n "${_brew_prefix_cache[$package]}" ]]; then
+      echo "${_brew_prefix_cache[$package]}"
+    else
+      local result=$(brew --prefix "$package")
+      _brew_prefix_cache[$package]=$result
+      echo $result
+    fi
+  }
+fi
+
 # Linuxbrew
 if [ -f "/home/linuxbrew/.linuxbrew/bin/brew" ]; then
   # Inline linux-brew setup to improve shell startup speed by around 200ms.
@@ -209,11 +235,12 @@ path_prepend "$HOME/.local/share/rtx/bin"
 path_prepend "$HOME/.local/share/rtx/shims"
 
 # orbstack setup
-if [ -f "$HOME/.orbstack/shell/init.zsh" ]; then
-  source "$HOME/.orbstack/shell/init.zsh"
-fi
+source-if-exists "$HOME/.orbstack/shell/init.zsh"
 path_prepend "$HOME/.orbstack/bin"
 
+# Google Cloud SDK setup
+source-if-exists "${HOMEBREW_PREFIX}/Caskroom/google-cloud-sdk/latest/google-cloud-sdk/path.zsh.inc"
+
 # ==============================================================================
 # Path setup for select binaries installed with zinit
 # ==============================================================================

zshrc

@@ -116,6 +116,11 @@ fi
 # Prompt
 # ==============================================================================
 
+if ! command-exists starship; then
+  read -q 'REPLY?starship is not installed, install with `rtx install starship`? [y/N]:' &&
+    echo && rtx install starship
+fi
+
 if command-exists starship; then
   eval "$(starship init zsh --print-full-init)"