Refactored dot-zshrc config (#46)

Added in command checking to the dot-zshrc file to now check if things
are installed before attempting to set aliases or run programs. This
allows easier sharing of this file for other users or even other
devices.

Reviewed-on: #46

zsh/dot-zshrc

@@ -3,25 +3,36 @@
 ############### ALIASES ####################
 
 # Load bottom with the proper color scheme
+if command -v btm &>/dev/null; then
   alias btm="btm --theme=gruvbox"
+fi
 
 # Remap ls to use lsd
+if command -v lsd &>/dev/null; then
   alias ls="lsd"
-
   # Add alias for la to call lsd -lah
   alias la="lsd -lah"
+fi
 
 # Replace cat with bat
+if command -v bat &>/dev/null; then
   alias cat="bat"
+fi
 
 # Alias cd to z for zoxide
+if command -v zoxide &>/dev/null; then
   alias cd="z"
+fi
 
 # Alias vim to nvim
+if command -v nvim &>/dev/null; then
   alias vim="nvim"
+fi
 
 # Alias for stow --dotfiles
+if command -v stow &>/dev/null; then
   alias stow.="stow --dotfiles"
+fi
 
 ############### END ALIASES ###############
 
@@ -31,7 +42,9 @@ alias stow.="stow --dotfiles"
 export PATH=$HOME/.local/bin:$PATH
 
 # Export my local-progs directory to find executables
+if [[ -d "$HOME/local-progs" ]]; then
   export PATH=$HOME/local-progs/:$PATH
+fi
 
 # Pre-configure settings for zsh-vi-mode
 function zvm_config() {
@@ -43,17 +56,25 @@ function zvm_config() {
 
 # Add in our fzf integrations for zsh
 # Comment if you don't want the fzf integration
+if command -v fzf &>/dev/null; then 
   source <(fzf --zsh)
+fi
 
 # Enable vi mode for zsh
+if [[ -f "$HOME/local-progs/zsh-vi-mode/zsh-vi-mode.plugin.zsh" ]]; then
   source $HOME/local-progs/zsh-vi-mode/zsh-vi-mode.plugin.zsh
+fi
 
 # We want to make sure that autocompletions are loaded
 autoload -Uz compinit && compinit
 
 # Initialize zoxide
+if command -v zoxide &>/dev/null; then
   eval "$(zoxide init zsh)"
+fi
 
 # Finally we want to use starship for our prompt
 # (because rust that's why)
+if command -v starship &>/dev/null; then
   eval "$(starship init zsh)"
+fi