use failproof relative require logic in bin script

1 files changed, 5 insertions, 1 deletions

diff --git a/bin/asciidoctor-pdf b/bin/asciidoctor-pdf
index 083860bc..6649aaf7 100755
--- a/bin/asciidoctor-pdf
+++ b/bin/asciidoctor-pdf
@@ -1,6 +1,10 @@
 #!/usr/bin/env ruby
 
-require_relative '../lib/asciidoctor-pdf'
+if File.exist?(asciidoctor_pdf = (File.expand_path '../../lib/asciidoctor-pdf', __FILE__))
+  require asciidoctor_pdf
+else
+  require 'asciidoctor-pdf'
+end
 require 'asciidoctor/cli'
 
 options = Asciidoctor::Cli::Options.new backend: 'pdf', header_footer: true