Now completely unexecuted source files can be included in reporting. Specifying --source tells coverage.py where to search for files that haven't been executed.

2 files changed, 11 insertions, 0 deletions

diff --git a/coverage/control.py b/coverage/control.py
index dd7d705..28c8850 100644
--- a/coverage/control.py
+++ b/coverage/control.py
@@ -9,6 +9,7 @@ from coverage.collector import Collector
 from coverage.config import CoverageConfig
 from coverage.data import CoverageData
 from coverage.files import FileLocator, TreeMatcher, FnmatchMatcher
+from coverage.files import find_python_files
 from coverage.html import HtmlReporter
 from coverage.misc import CoverageException, bool_or_none
 from coverage.results import Analysis, Numbers
@@ -303,6 +304,7 @@ class coverage(object):
                     else:
                         pkg_file = self._source_for_file(pkg_file)
                     pkg_file = self.file_locator.canonical_filename(pkg_file)
+                    self.source.append(pkg_file)
                     self.source_match.add(pkg_file)
 
             for pkg in found:
@@ -437,6 +439,11 @@ class coverage(object):
             if not summary:
                 self._warn("No data was collected.")
 
+            # Find files that were never executed at all.
+            for src in self.source:
+                for py_file in find_python_files(src):
+                    self.data.touch_file(py_file)
+
             self._harvested = True
 
     # Backward compatibility with version 1.
diff --git a/coverage/data.py b/coverage/data.py
index 6d49f71..30119d9 100644
--- a/coverage/data.py
+++ b/coverage/data.py
@@ -207,6 +207,10 @@ class CoverageData(object):
         for filename, arcs in arc_data.items():
             self.arcs.setdefault(filename, {}).update(arcs)
 
+    def touch_file(self, filename):
+        """Ensure that `filename` appears in the data, empty if needed."""
+        self.lines.setdefault(filename, {})
+
     def executed_files(self):
         """A list of all files that had been measured as executed."""
         return list(self.lines.keys())