plugins/plenv: use `_command_exists`

clean_files.txt

@@ -90,6 +90,7 @@ plugins/available/history.plugin.bash
 plugins/available/hub.plugin.bash
 plugins/available/jump.plugin.bash
 plugins/available/node.plugin.bash
+plugins/available/plenv.plugin.bash
 plugins/available/pyenv.plugin.bash
 plugins/available/rbenv.plugin.bash
 plugins/available/textmate.plugin.bash

plugins/available/plenv.plugin.bash

@@ -1,18 +1,16 @@
+# shellcheck shell=bash
+#
 # plugin for plenv
 
 cite about-plugin
 about-plugin 'plenv plugin for Perl'
 
-if [[ -e "${HOME}/.plenv/bin" ]] ; then
+if [[ -d "${HOME}/.plenv/bin" ]]; then
-
+	# load plenv bin dir into path if it exists
-  # load plenv bin dir into path if it exists
+	pathmunge "${HOME}/.plenv/bin"
-  pathmunge "${HOME}/.plenv/bin"
-
 fi
 
-if [[ `which plenv` ]] ; then
+if _command_exists plenv; then
-
+	# init plenv
-  # init plenv
+	eval "$(plenv init - bash)"
-  eval "$(plenv init - bash)"
-
 fi