[Predator] Add ``Project`` class and ``ClassifySuspect`` method to project and component classifier

appengine/findit/crash/component.py

Index: appengine/findit/crash/component.py
diff --git a/appengine/findit/crash/component.py b/appengine/findit/crash/component.py
index 5e1c7a66ab75cce7d17c01ed7433157183a78918..b1f0c7b787eade3dc6feef1e4ead6b47d957aa45 100644
--- a/appengine/findit/crash/component.py
+++ b/appengine/findit/crash/component.py
@@ -5,6 +5,8 @@
 from collections import namedtuple
 import re
 
+from libs.gitiles.diff import ChangeType
+
 
 # TODO(http://crbug.com/659346): write the coverage tests.
 class Component(namedtuple('Component',
@@ -23,7 +25,6 @@ class Component(namedtuple('Component',
       re.compile(path_regex),
       re.compile(function_regex) if function_regex else None)
 
-
   def MatchesStackFrame(self, frame):
     """Returns true if this component matches the frame."""
     if not self.path_regex.match(frame.dep_path + frame.file_path):
@@ -35,6 +36,16 @@ class Component(namedtuple('Component',
       return True
     return self.function_regex.match(frame.function)
 
-  def MatchesFile(self, file_path):
-    """Returns true if this component matches file path."""
-    return self.path_regex.match(file_path)
+  def MatchesTouchedFile(self, dep_path, touched_file):

[chanli, 2017/01/26 21:31:06]

This function is similar to MatchesTouchedFile in project, is it possible to
merge them somehow?

[Sharu Jiang, 2017/01/27 03:20:42]

Since the ``Project`` and ``Component`` are 2 fundamentally different things and
they are namedtuples too, so I cannot define a base class for these two,
considered the similarity is limited, I would prefer to leave them as it is.

+    """Returns true if the touched file belongs to this component."""
+    # TODO(ymzhang): use component of new path as default. RENAME might
+    # need to return two (old path new path may have different components)
+    if touched_file.change_type == ChangeType.DELETE:
+      path = touched_file.old_path
+    else:
+      path = touched_file.new_path
+
+    if self.path_regex.match(dep_path + path):
+      return True
+
+    return False