lib/sdoc/github.rb in sdoc-0.2.17 vs lib/sdoc/github.rb in sdoc-0.2.18

@@ -16,22 +16,29 @@
     end
     @github_url_cache[path]
   end
   
   protected
-  
+
+  def have_git?
+    @have_git = system('git --version > /dev/null 2>&1') if @have_git.nil?
+    @have_git
+  end
+
   def commit_sha1(path)
+    return false unless have_git?
     name = File.basename(path)
-    s = in_dir(File.join(basedir, File.dirname(path))) do
+    s = Dir.chdir(File.join(basedir, File.dirname(path))) do
       `git log -1 --pretty=format:"commit %H" #{name}`
     end
     m = s.match(/commit\s+(\S+)/)
     m ? m[1] : false
   end
   
   def repository_url(path)
-    s = in_dir(File.join(basedir, File.dirname(path))) do
+    return false unless have_git?
+    s = Dir.chdir(File.join(basedir, File.dirname(path))) do
       `git config --get remote.origin.url`
     end
     m = s.match(%r{github.com[/:](.*)\.git$})
     m ? "http://github.com/#{m[1]}/blob/" : false
   end
@@ -48,17 +55,7 @@
         return path
       end
       path = File.dirname(path)
     end
     ''
-  end  
-  
-  def in_dir(dir)
-    pwd = Dir.pwd
-    Dir.chdir dir
-    return yield
-  rescue Exception => e
-    return ''
-  ensure
-    Dir.chdir pwd
   end
 end