apply patch from Jakub wrt fixing resultlog/xdist combo

--HG--
branch : trunk

CHANGELOG

@@ -1,4 +1,4 @@
-Changes between 1.3.1 and 1.3.x
+Changes between 1.3.1 and 1.3.2a
 ==================================================
 
 New features 
@@ -56,6 +56,8 @@ Bug fixes / Maintenance
 - make path.bestrelpath(path) return ".", note that when calling 
   X.bestrelpath the assumption is that X is a directory. 
 - make initial conftest discovery ignore "--" prefixed arguments 
+- fix resultlog plugin when used in an multicpu/multihost xdist situation 
+  (thanks Jakub Gustak) 
 
 Changes between 1.3.0 and 1.3.1
 ==================================================

py/_plugin/pytest_resultlog.py

@@ -16,7 +16,8 @@ def pytest_addoption(parser):
 
 def pytest_configure(config):
     resultlog = config.option.resultlog
-    if resultlog:
+    # prevent opening resultlog on slave nodes (xdist)
+    if resultlog and not hasattr(config, 'slaveinput'):
         logfile = open(resultlog, 'w', 1) # line buffered
         config._resultlog = ResultLog(config, logfile) 
         config.pluginmanager.register(config._resultlog)

testing/plugin/test_pytest_resultlog.py

@@ -1,6 +1,7 @@
 import py
 import os
-from py._plugin.pytest_resultlog import generic_path, ResultLog
+from py._plugin.pytest_resultlog import generic_path, ResultLog, \
+        pytest_configure, pytest_unconfigure
 from py._test.collect import Node, Item, FSCollector
 
 def test_generic_path(testdir):
@@ -173,3 +174,18 @@ def test_generic(testdir, LineMatcher):
         "x *:test_xfail_norun", 
     ])
 
+def test_no_resultlog_on_slaves(testdir):
+    config = testdir.parseconfig("-p", "resultlog", "--resultlog=resultlog")
+
+    assert not hasattr(config, '_resultlog')
+    pytest_configure(config)
+    assert hasattr(config, '_resultlog')
+    pytest_unconfigure(config)
+    assert not hasattr(config, '_resultlog')
+
+    config.slaveinput = {}
+    pytest_configure(config)
+    assert not hasattr(config, '_resultlog')
+    pytest_unconfigure(config)
+    assert not hasattr(config, '_resultlog')
+