From defaa55edb479986cf181176eda89aa53ee0b60e Mon Sep 17 00:00:00 2001
From: Kouhei Sutou <kou@clear-code.com>
Date: Thu, 7 Aug 2014 18:00:41 +0900
Subject: [PATCH] Suppress "No such file or directory - list" message

How to reproduce:

  1. Remove ~/.fluentd-ui/
  2. Run `bin/rails console`
  3. You will see the following output:

         bin/rails: No such file or directory - list
         Loading development environment (Rails 4.1.4)
         irb(main):001:0>
---
 app/models/plugin.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/models/plugin.rb b/app/models/plugin.rb
index 6db9160..041ba01 100644
--- a/app/models/plugin.rb
+++ b/app/models/plugin.rb
@@ -88,7 +88,9 @@ class Plugin
   def self.installed
     Rails.cache.fetch("installed_gems", expires_in: 3.seconds) do
       Bundler.with_clean_env do
-        gems = `#{fluent_gem_path} list`.try(:lines)
+        fluent_gem = fluent_gem_path
+        return [] unless fluent_gem
+        gems = `#{fluent_gem} list`.try(:lines)
         return [] unless gems
         gems.grep(/fluent-plugin/).map do |gem|
           name, versions_str = gem.strip.split(" ")