[dak/master] Improve error message for uploads that miss files.

[Ansgar Burchardt <ansgar@debian.org>]

---
 daklib/checks.py |   23 +++++++++++++++++------
 daklib/upload.py |    7 +++++++
 2 files changed, 24 insertions(+), 6 deletions(-)

diff --git a/daklib/checks.py b/daklib/checks.py
index 2e76e78..7298026 100644
--- a/daklib/checks.py
+++ b/daklib/checks.py
@@ -34,6 +34,7 @@ import daklib.utils as utils
 import apt_inst
 import apt_pkg
 from apt_pkg import version_compare
+import errno
 import os
 import time
 import yaml
@@ -165,13 +166,23 @@ class ChangesCheck(Check):
 class HashesCheck(Check):
     """Check hashes in .changes and .dsc are valid."""
     def check(self, upload):
-        changes = upload.changes
-        for f in changes.files.itervalues():
-            f.check(upload.directory)
-        source = changes.source
-        if source is not None:
-            for f in source.files.itervalues():
+        what = None
+        try:
+            changes = upload.changes
+            what = changes.filename
+            for f in changes.files.itervalues():
                 f.check(upload.directory)
+            source = changes.source
+            what = source.filename
+            if source is not None:
+                for f in source.files.itervalues():
+                    f.check(upload.directory)
+        except IOError as e:
+            if e.errno == errno.ENOENT:
+                raise Reject('{0} refers to non-existing file: {1}\n'
+                             'Perhaps you need to include it in your upload?'
+                             .format(what, os.path.basename(e.filename)))
+            raise
 
 class ExternalHashesCheck(Check):
     """Checks hashes in .changes and .dsc against an external database."""
diff --git a/daklib/upload.py b/daklib/upload.py
index c55c409..447fa34 100644
--- a/daklib/upload.py
+++ b/daklib/upload.py
@@ -489,3 +489,10 @@ class Source(object):
         if len(fields) > 1:
             return fields[0]
         return "main"
+
+    @property
+    def filename(self):
+        """filename of .dsc file
+        @type: str
+        """
+        return self._dsc_file.filename
-- 
1.7.2.5