Introduce WPTServe for running W3C Blink Layout tests

Tools/Scripts/webkitpy/common/system/executive.py

Index: Tools/Scripts/webkitpy/common/system/executive.py
diff --git a/Tools/Scripts/webkitpy/common/system/executive.py b/Tools/Scripts/webkitpy/common/system/executive.py
index 5d53ab9b57c7e849a5d100ec5cd8be2064d0061b..bde0051689f6144d7ebbfbade376b9ecfadd8607 100644
--- a/Tools/Scripts/webkitpy/common/system/executive.py
+++ b/Tools/Scripts/webkitpy/common/system/executive.py
@@ -43,6 +43,22 @@ from webkitpy.common.system.filesystem import FileSystem
 
 _log = logging.getLogger(__name__)
 
+class EnvPath(list):
+    """EnvPath represents a system environment PATH. It can be used for all
+    environment variables which are PATH-like, such as PYTHONPATH. The paths
+    are represented as a simple python list and live in memory until update()
+    is called at which point the environment variable gets written to.
+    """
+
+    def __init__(self, env, var, pathsep):
+        self._env = env
+        self._pathsep = pathsep
+        self._var = var
+        super(EnvPath, self).__init__(self._env[self._var].split(self._pathsep))
+
+    def update(self):
+        self._env[self._var] = self._pathsep.join(self)

[Dirk Pranke, 2015/06/12 22:25:01]

These changes are not necessary, and we should never modify os.environ directly
(which is what this does). More comments about this elsewhere ...

[burnik, 2015/06/15 10:35:09]

Done.

+
 
 class ScriptError(Exception):
 
@@ -86,6 +102,8 @@ class ScriptError(Exception):
 class Executive(object):
     PIPE = subprocess.PIPE
     STDOUT = subprocess.STDOUT
+    DEVNULL = open(os.devnull, 'wb')
+    pythonpath = EnvPath(os.environ, "PYTHONPATH", os.pathsep)

[Dirk Pranke, 2015/06/12 22:25:01]

the pythonpath change isn't necessary.

[burnik, 2015/06/15 10:35:09]

Done.

 
     def _should_close_fds(self):
         # We need to pass close_fds=True to work around Python bug #2320