Make homebrew initialization more general

rc.local/linuxbrew.sh

@@ -1,5 +1,22 @@
-nop ${BREW_HOME:=/home/linuxbrew}
-nop ${BREW:="$BREW_HOME/.linuxbrew/bin/brew"}
+# Homebrew initialization
+# Can set BREW_HOME in advance
+
+BREW_LOCATIONS=( \
+ "$HOME/.local/share/linuxbrew" \
+ "$HOME/.linuxbrew" \
+ "/home/linuxbrew/.linuxbrew" \
+)
+  
+if [[ ! -d "$BREW_HOME" ]]; then
+  for brew_path in "${BREW_LOCATIONS[@]}"; do
+    if [[ -d "$brew_path" ]]; then
+      BREW_HOME="$brew_path"
+      break
+    fi
+  done
+fi
+
+BREW="$BREW_HOME/bin/brew"
 
 if [[ -e "$BREW" ]]; then
   path_backup="$PATH"
@@ -9,3 +26,4 @@ if [[ -e "$BREW" ]]; then
   append_path "$HOMEBREW_PREFIX/bin"
   append_path "$HOMEBREW_PREFIX/sbin"
 fi
+