Builder: Determine new files based on modification time

Instead of naively looking at files that did not exist before, the
new output file detector now uses modification time as well to
determine if a file is new (and needs to be copied to the master).

distrib/autobuild.py

@@ -55,16 +55,13 @@ def todays_platform_release():
 
     # We'll copy the new files to the build dir.
     os.chdir(builder.config.DISTRIB_DIR)
-    existingFiles = os.listdir('releases')    
+    oldFiles = DirState('releases', subdirs=False)
 
     print 'platform_release.py...'
-    os.system("python platform_release.py > %s 2> %s" % ('buildlog.txt', 'builderrors.txt'))
-
-    currentFiles = os.listdir('releases')
-    for n in existingFiles:
-        currentFiles.remove(n)
-
-    for n in currentFiles:
+    os.system("python platform_release.py > %s 2> %s" % \
+        ('buildlog.txt', 'builderrors.txt'))
+
+    for n in DirState('releases', subdirs=False).list_new_files(oldFiles):
         # Copy any new files.
         remote_copy(os.path.join('releases', n), ev.file_path(n))
 
@@ -74,7 +71,8 @@ def todays_platform_release():
             if '_amd64' in n: arch = 'amd64'
             remote_copy(os.path.join('releases', n),
                         os.path.join(builder.config.APT_REPO_DIR, 
-                                     builder.config.APT_DIST + '/main/binary-%s' % arch, n))
+                                     builder.config.APT_DIST + \
+                                     '/main/binary-%s' % arch, n))
 
     # Also the build logs.
     remote_copy('buildlog.txt', ev.file_path('doomsday-out-%s.txt' % sys_id()))

distrib/builder/utils.py

@@ -28,8 +28,9 @@ def __repr__(self):
 
 
 class DirState:
-    def __init__(self, path=None):
+    def __init__(self, path=None, subdirs=True):
         self.files = {} # path -> FileState
+        self.subdirs = subdirs
         if path:
             self.update(path, path)
 
@@ -39,7 +40,7 @@ def update(self, path, omitted=None):
             fullPath = os.path.join(path, name)
             self.files[omit_path(fullPath, omitted)] = \
                 FileState(os.path.isdir(fullPath), os.stat(fullPath).st_mtime)
-            if os.path.isdir(fullPath):
+            if os.path.isdir(fullPath) and self.subdirs:
                 self.update(fullPath, omitted)
 
     def list_new_files(self, oldState):