Use whence' (which works on both bash and vanilla sh) instead of test -p' (which is bash-specific)

git-svn-id: http://svn.rubyonrails.org/rails/tools/capistrano@7040 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

CHANGELOG

@@ -1,5 +1,7 @@
 *SVN*
 
+* Use `whence' to test whether a command exists in the remote path, instead of `test -p' [Jamis Buck]
+
 * Make sure the connection factory is established synchronously, to avoid multiple gateway instances being spawned [Jamis Buck]
 
 * Make sure symlink and finalize_update tasks reference the most recent release when called by themselves [Jamis Buck]

lib/capistrano/recipes/deploy/remote_dependency.rb

@@ -23,7 +23,7 @@ module Capistrano
 
       def command(command, options={})
         @message ||= "`#{command}' could not be found in the path"
-        try("type -p #{command}", options)
+        try("which #{command}", options)
         self
       end