Add the Precious() method.

4 files changed, 31 insertions, 0 deletions

diff --git a/src/engine/SCons/Node/FS.py b/src/engine/SCons/Node/FS.py
index 2ce1151..7c19b81 100644
--- a/src/engine/SCons/Node/FS.py
+++ b/src/engine/SCons/Node/FS.py
@@ -566,5 +566,10 @@ class File(Entry):
         Entry.build(self)
         self.exists_flag = self.exists()
 
+    def remove(self):
+        """Remove this file."""
+        if self.exists():
+            os.unlink(self.path)
+
 default_fs = FS()
 
diff --git a/src/engine/SCons/Node/FSTests.py b/src/engine/SCons/Node/FSTests.py
index 12dfdbe..2b3ba37 100644
--- a/src/engine/SCons/Node/FSTests.py
+++ b/src/engine/SCons/Node/FSTests.py
@@ -438,6 +438,12 @@ class FSTestCase(unittest.TestCase):
         nonexistent(fs.Dir, 'nonexistent')
         nonexistent(fs.Dir, 'nonexistent/foo')
 
+        test.write("remove_me", "\n")
+        assert os.path.exists(test.workpath("remove_me"))
+        f1 = fs.File(test.workpath("remove_me"))
+        f1.remove()
+        assert not os.path.exists(test.workpath("remove_me"))
+
         #XXX test current() for directories
 
         #XXX test sconsign() for directories
diff --git a/src/engine/SCons/Node/NodeTests.py b/src/engine/SCons/Node/NodeTests.py
index aa9dccb..bcaf1a0 100644
--- a/src/engine/SCons/Node/NodeTests.py
+++ b/src/engine/SCons/Node/NodeTests.py
@@ -206,6 +206,15 @@ class NodeTestCase(unittest.TestCase):
         node.set_csig('zzz')
         assert node.get_csig() == 'zzz'
 
+    def test_set_precious(self):
+        """Test setting a Node's precious value
+        """
+        node = SCons.Node.Node()
+        node.set_precious()
+        assert node.precious
+        node.set_precious(7)
+        assert node.precious == 7
+
     def test_add_dependency(self):
 	"""Test adding dependencies to a Node's list.
 	"""
diff --git a/src/engine/SCons/Node/__init__.py b/src/engine/SCons/Node/__init__.py
index 03705f7..02c14bb 100644
--- a/src/engine/SCons/Node/__init__.py
+++ b/src/engine/SCons/Node/__init__.py
@@ -70,11 +70,14 @@ class Node:
         self.bsig = None
         self.csig = None
         self.use_signature = 1
+        self.precious = None
 
     def build(self):
         """Actually build the node.   Return the status from the build."""
 	if not self.builder:
 	    return None
+        if not self.precious:
+            self.remove()
         try:
             stat = self.builder.execute(env = self.env.Dictionary(),
                                         target = self, source = self.sources)
@@ -164,6 +167,14 @@ class Node:
         """Set the signature of the node's content."""
         self.csig = csig
 
+    def set_precious(self, precious = 1):
+        """Set the Node's precious value."""
+        self.precious = precious
+
+    def remove(self):
+        """Remove this Node's external object:  no-op by default."""
+        pass
+
     def add_dependency(self, depend):
 	"""Adds dependencies. The depend argument must be a list."""
         self._add_child(self.depends, depend)