From c486acc05402e4e9644d06030bc4263bfcb4f6d1 Mon Sep 17 00:00:00 2001
From: Gary Oberbrunner <garyo@oberbrunner.com>
Date: Sat, 31 Jul 2010 19:34:57 +0000
Subject: Fix issue 2048: when morphing an Entry into a Dir, retain any
 existing executor action list.

---
 src/CHANGES.txt                  |  4 ++++
 src/engine/SCons/Node/FS.py      | 21 ++++++++++++++++++---
 src/engine/SCons/Node/FSTests.py |  4 ++--
 3 files changed, 24 insertions(+), 5 deletions(-)

diff --git a/src/CHANGES.txt b/src/CHANGES.txt
index ddc70cf..cf28f38 100644
--- a/src/CHANGES.txt
+++ b/src/CHANGES.txt
@@ -7,6 +7,10 @@
 
 RELEASE 2.1.0.alpha.yyyymmdd - NEW DATE WILL BE INSERTED HERE
 
+  From Ken Deeter:
+
+    - Fix a problem when FS Entries which are actually Dirs have builders.
+
   From Luca Falavigna:
 
     - Support Fortran 03
diff --git a/src/engine/SCons/Node/FS.py b/src/engine/SCons/Node/FS.py
index 4aeaff7..967da26 100644
--- a/src/engine/SCons/Node/FS.py
+++ b/src/engine/SCons/Node/FS.py
@@ -1083,7 +1083,10 @@ class FS(LocalFS):
         self.max_drift = max_drift
 
     def getcwd(self):
-        return self._cwd
+        if hasattr(self, "_cwd"):
+           return self._cwd
+        else:
+           return "<no cwd>"
 
     def chdir(self, dir, change_os_dir=0):
         """Change the current working directory for lookups.
@@ -1353,8 +1356,20 @@ class Dir(Base):
         # Don't just reset the executor, replace its action list,
         # because it might have some pre-or post-actions that need to
         # be preserved.
-        self.builder = get_MkdirBuilder()
-        self.get_executor().set_action_list(self.builder.action)
+        #
+        # But don't reset the executor if there is a non-null executor
+        # attached already. The existing executor might have other
+        # targets, in which case replacing the action list with a
+        # Mkdir action is a big mistake.
+        if not hasattr(self, 'executor'):
+            self.builder = get_MkdirBuilder()
+            self.get_executor().set_action_list(self.builder.action)
+        else:
+            # Prepend MkdirBuilder action to existing action list
+            l = self.get_executor().action_list
+            a = get_MkdirBuilder().action
+            l.insert(0, a) 
+            self.get_executor().set_action_list(l)
 
     def diskcheck_match(self):
         diskcheck_match(self, self.isfile,
diff --git a/src/engine/SCons/Node/FSTests.py b/src/engine/SCons/Node/FSTests.py
index 9a393e2..b5c1448 100644
--- a/src/engine/SCons/Node/FSTests.py
+++ b/src/engine/SCons/Node/FSTests.py
@@ -1676,8 +1676,8 @@ class DirTestCase(_tempdirTestCase):
         x.add_post_action('post')
         e.must_be_same(SCons.Node.FS.Dir)
         a = x.get_action_list()
-        assert a[0] == 'pre', a
-        assert a[2] == 'post', a
+        assert 'pre' in a, a
+        assert 'post' in a, a
 
     def test_subclass(self):
         """Test looking up subclass of Dir nodes"""
-- 
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