Add directory detection to _remote_md5 and use this in copy

If it is a directory, change the destination path by appending the
basename of the source file, like is done if the destination ends with a
/, and try to get the MD5 of the new path.

lib/ansible/runner/__init__.py

@@ -511,7 +511,7 @@ class Runner(object):
     def _remote_md5(self, conn, tmp, path):
         ''' takes a remote md5sum without requiring python, and returns 0 if no file '''
 
-        test = "rc=0; [ -r \"%s\" ] || rc=2; [ -f \"%s\" ] || rc=1" % (path,path)
+        test = "rc=0; [ -r \"%s\" ] || rc=2; [ -f \"%s\" ] || rc=1; [ -d \"%s\" ] && rc=3" % (path, path, path)
         md5s = [
             "(/usr/bin/md5sum %s 2>/dev/null)" % path,  # Linux
             "(/sbin/md5sum -q %s 2>/dev/null)" % path,  # ?

lib/ansible/runner/action_plugins/copy.py

@@ -34,10 +34,6 @@ class ActionModule(object):
         source  = options.get('src', None)
         dest    = options.get('dest', None)
 
-        if dest.endswith("/"):
-            base = os.path.basename(source)
-            dest = os.path.join(dest, base)
-
         if (source is None and not 'first_available_file' in inject) or dest is None:
             result=dict(failed=True, msg="src and dest are required")
             return ReturnData(conn=conn, result=result)
@@ -65,7 +61,15 @@ class ActionModule(object):
             result=dict(failed=True, msg="could not find src=%s" % source)
             return ReturnData(conn=conn, result=result)
 
+        if dest.endswith("/"):
+            base = os.path.basename(source)
+            dest = os.path.join(dest, base)
+
         remote_md5 = self.runner._remote_md5(conn, tmp, dest)
+        if remote_md5 == '3':
+            # Destination is a directory
+            dest = os.path.join(dest, os.path.basename(source))
+            remote_md5 = self.runner._remote_md5(conn, tmp, dest)
 
         exec_rc = None
         if local_md5 != remote_md5: