Provide X-compatible find_binary function that finds a binary for a given command. Works with zsh/bash

lib/scm_breeze.sh

@@ -12,11 +12,15 @@ disable_nullglob() { if [ $shell = "zsh" ]; then unsetopt NULL_GLOB; else shopt
 # Alias wrapper that ignores errors if alias is not defined.
 _alias(){ alias "$@" 2> /dev/null; }
 
-if [ $shell = "zsh" ]; then
-  export GIT_BINARY=$(type -p git | sed 's/git is //' | head -1)
-else
-  export GIT_BINARY=$(type -P git)
-fi
+find_binary(){
+  if [ $shell = "zsh" ]; then
+    type -p "$1" | sed "s/$1 is //" | head -1
+  else
+    type -P "$1"
+  fi
+}
+
+export GIT_BINARY=$(find_binary git)
 
 # Updates SCM Breeze from GitHub.
 update_scm_breeze() {