look for plugins to extend rehash and which

libexec/rbenv-rehash

@@ -1,14 +1,28 @@
 #!/usr/bin/env bash -e
 
-mkdir -p "${HOME}/.rbenv/shims"
-cd "${HOME}/.rbenv/shims"
-rm -f *
+make_shims() {
+  local glob="$@"
 
-for file in ../versions/*/bin/*; do
-  shim="${file##*/}"
-  cat > "$shim" <<SH
+  for file in $glob; do
+    local shim="${file##*/}"
+    cat > "$shim" <<SH
 #!/bin/sh
 exec rbenv exec $shim "\$@"
 SH
-  chmod +x "$shim"
+    chmod +x "$shim"
+  done
+}
+
+mkdir -p "${HOME}/.rbenv/shims"
+cd "${HOME}/.rbenv/shims"
+rm -f *
+
+make_shims ../versions/*/bin/*
+
+shopt -s nullglob
+RBENV_REHASH_PLUGINS=(/etc/rbenv.d/rehash/*.bash ${HOME}/.rbenv/rbenv.d/rehash/*.bash)
+shopt -u nullglob
+
+for script in $RBENV_REHASH_PLUGINS; do
+  source $script
 done

libexec/rbenv-which

@@ -4,6 +4,14 @@ RBENV_VERSION="$(rbenv-version)"
 RBENV_COMMAND="$1"
 RBENV_COMMAND_PATH="${HOME}/.rbenv/versions/${RBENV_VERSION}/bin/${RBENV_COMMAND}"
 
+shopt -s nullglob
+RBENV_WHICH_PLUGINS=(/etc/rbenv.d/which/*.bash ${HOME}/.rbenv/rbenv.d/which/*.bash)
+shopt -u nullglob
+
+for script in $RBENV_WHICH_PLUGINS; do
+  source $script
+done
+
 if [ -x "$RBENV_COMMAND_PATH" ]; then
   echo "$RBENV_COMMAND_PATH"
 else