+
+################################################################################
+
+def cc_fix_changes (changes):
+ o = changes.get("architecture", "")
+ if o != "":
+ del changes["architecture"]
+ changes["architecture"] = {}
+ for j in string.split(o):
+ changes["architecture"][j] = 1
+
+# Sort by 'have source', by source name, by source version number, by filename
+
+def changes_compare (a, b):
+ try:
+ a_changes = parse_changes(a, 0)
+ except changes_parse_error_exc, line:
+ return -1;
+
+ try:
+ b_changes = parse_changes(b, 0)
+ except changes_parse_error_exc, line:
+ return 1;
+
+ cc_fix_changes (a_changes);
+ cc_fix_changes (b_changes);
+
+ # Sort by 'have source'
+
+ a_has_source = a_changes["architecture"].get("source")
+ b_has_source = b_changes["architecture"].get("source")
+ if a_has_source and not b_has_source:
+ return -1;
+ elif b_has_source and not a_has_source:
+ return 1;
+
+ # Sort by source name
+
+ a_source = a_changes.get("source");
+ b_source = b_changes.get("source");
+ q = cmp (a_source, b_source);
+ if q:
+ return q;
+
+ # Sort by source version
+
+ a_version = a_changes.get("version");
+ b_version = b_changes.get("version");
+ q = apt_pkg.VersionCompare(a_version, b_version);
+ if q:
+ return q
+
+ # Fall back to sort by filename
+
+ return cmp(a, b);
+
+################################################################################