sh: Use exist program

Fix sh module packages to make more extensive use of the exist program
that also ships with the sh module.
Simplifies intent of the code and makes it much easier to read.

sh/.config/sh/alias

@@ -61,6 +61,8 @@ if exist fzf; then
         fzf_pkg_tool=yay
     elif exist paru; then
         fzf_pkg_tool=paru
+    elif exist pacman; then
+        fzf_pkg_tool=pacman
     fi
     # shellcheck disable=2139 # we *want* this to be done at shell startup instead of dynamically
     if [ -n "$fzf_pkg_tool" ]; then
@@ -89,6 +91,4 @@ fi
 if exist vifm; then
     alias vm=vifm
     alias vmm='vifm ${PWD}'
-    # enable picture preview script
-    exist vifmrun && alias vifm=vifmrun
 fi

sh/.config/sh/alias.d/enable-fasd-hook.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 # more usage instructions at https://github.com/clvv/fasd
 # eval "$(fasd --init posix-hook posix_alias bash-hook zsh-hook zsh-ccomp zsh-ccomp-install zsh-wcomp zsh-wcomp-install)"
-type fasd >/dev/null 2>&1 && eval "$(fasd --init auto)"
+exist fasd && eval "$(fasd --init auto)"
 
 # any
 alias a='fasd -a'

sh/.config/sh/alias.d/yay.sh

@@ -6,28 +6,28 @@
 # Also makes yay call paru since that is the new hotness
 # (or at least I want to try it)
 
-type paru >/dev/null 2>&1 && {
+exist paru && {
     # recreate the normal look of yay
     alias yay="paru --bottomup"
 }
 
 syu() {
-    type topgrade >/dev/null 2>&1 && {
+    exist topgrade && {
         topgrade
         return
     }
 
-    type paru >/dev/null 2>&1 && {
+    exist paru && {
         paru
         return
     }
 
-    type yay >/dev/null 2>&1 && {
+    exist yay && {
         yay
         return
     }
 
-    type pacman >/dev/null 2>&1 && {
+    exist pacman && {
         echo "Did not find paru, or yay installed. Updates will not be applied to aur packages."
         sudo pacman -Syu
         return