elvish: add to deploy script

deploy.sh

@@ -90,6 +90,7 @@ cp -rfv ./home/.local/bin/ ~/.local/bin/
 # The bloated dotfiles itself
 cp -rfv ./home/.mbsyncrc                 ~/.mbsyncrc
 cp -rfv ./home/.rtorrent.rc              ~/.rtorrent.rc
+# cp -rfv ./home/.elvish/                  ~/.elvish/
 cp -rfv ./home/.config/alacritty/        ~/.config/alacritty/
 cp -rfv ./home/.config/amfora/           ~/.config/amfora/
 cp -rfv ./home/.config/anime-downloader/ ~/.config/anime-downloader/

home/.elvish/rc.elv

@@ -12,7 +12,9 @@ use math
 use readline-binding
 
 # Prompt
-eval (starship init elvish)
+if ?(command -v starship >/dev/null) {
+  eval (starship init elvish)
+}
 
 # Case-insensitive completion
 edit:completion:matcher[''] = [p]{ edit:match-prefix &ignore-case $p }