[svn r63000] * do an as lightweight config.mktemp() as possible

* avoid writing lock files if lock_timeout is 0 or None

--HG--
branch : trunk

py/path/local/local.py

@@ -618,25 +618,26 @@ class LocalPath(common.FSPathBase, PlatformMixin):
 
         # put a .lock file in the new directory that will be removed at
         # process exit
-        lockfile = udir.join('.lock')
-        mypid = os.getpid()
-        if hasattr(lockfile, 'mksymlinkto'):
-            lockfile.mksymlinkto(str(mypid))
-        else:
-            lockfile.write(str(mypid))
-        def try_remove_lockfile():
-            # in a fork() situation, only the last process should
-            # remove the .lock, otherwise the other processes run the
-            # risk of seeing their temporary dir disappear.  For now
-            # we remove the .lock in the parent only (i.e. we assume
-            # that the children finish before the parent).
-            if os.getpid() != mypid:
-                return
-            try:
-                lockfile.remove()
-            except py.error.Error:
-                pass
-        atexit.register(try_remove_lockfile)
+        if lock_timeout:
+            lockfile = udir.join('.lock')
+            mypid = os.getpid()
+            if hasattr(lockfile, 'mksymlinkto'):
+                lockfile.mksymlinkto(str(mypid))
+            else:
+                lockfile.write(str(mypid))
+            def try_remove_lockfile():
+                # in a fork() situation, only the last process should
+                # remove the .lock, otherwise the other processes run the
+                # risk of seeing their temporary dir disappear.  For now
+                # we remove the .lock in the parent only (i.e. we assume
+                # that the children finish before the parent).
+                if os.getpid() != mypid:
+                    return
+                try:
+                    lockfile.remove()
+                except py.error.Error:
+                    pass
+            atexit.register(try_remove_lockfile)
 
         # prune old directories
         if keep:
@@ -647,7 +648,7 @@ class LocalPath(common.FSPathBase, PlatformMixin):
                     try:
                         t1 = lf.lstat().mtime
                         t2 = lockfile.lstat().mtime
-                        if abs(t2-t1) < lock_timeout:
+                        if not lock_timeout or abs(t2-t1) < lock_timeout:
                             continue   # skip directories still locked
                     except py.error.Error:
                         pass   # assume that it means that there is no 'lf'

py/path/local/testing/test_local.py

@@ -275,8 +275,6 @@ class TestExecution(LocalSetup):
                 assert not numdir.new(ext=str(i-3)).check()
 
     def test_locked_make_numbered_dir(self):
-        if py.test.config.option.boxed: 
-            py.test.skip("Fails when run as boxed tests")
         root = self.tmpdir
         for i in range(10):
             numdir = local.make_numbered_dir(prefix='base2.', rootdir=root,

py/test/config.py

@@ -140,7 +140,7 @@ class Config(object):
             return basetemp.mkdir(basename)
         else:
             return py.path.local.make_numbered_dir(prefix=basename + "-", 
-                keep=0, rootdir=basetemp)
+                keep=0, rootdir=basetemp, lock_timeout=None)
 
     def getcolitems(self):
         return [self.getfsnode(arg) for arg in self.args]

py/test/dsession/testing/test_functional_dsession.py

@@ -1,12 +1,6 @@
-
-""" Tests various aspects of dist, like ssh hosts setup/teardown
-"""
-
 import py
 from py.__.test.dsession.dsession import DSession
 from test_masterslave import EventQueue
-import os
-
 
 class TestAsyncFunctional:
     def test_conftest_options(self, testdir):
@@ -80,6 +74,7 @@ class TestAsyncFunctional:
 
     def test_nice_level(self, testdir):
         """ Tests if nice level behaviour is ok """
+        import os
         if not hasattr(os, 'nice'):
             py.test.skip("no os.nice() available")
         testdir.makepyfile(conftest="""