read_pkgs: Parse Provides a bit earlier

Signed-off-by: Niels Thykier <niels@thykier.net>

britney.py

@@ -678,6 +678,29 @@ class Britney(object):
                 if "(" in source_raw:
                     source_version = intern(source_raw[source_raw.find("(")+1:source_raw.find(")")])
 
+            provides_raw = get_field('Provides')
+            if provides_raw:
+                parts = apt_pkg.parse_depends(provides_raw, False)
+                nprov = []
+                for or_clause in parts:
+                    if len(or_clause) != 1:
+                        msg = "Ignoring invalid provides in %s: Alternatives [%s]" % (str(pkg_id), str(or_clause))
+                        self.log(msg, type='W')
+                        continue
+                    for part in or_clause:
+                        provided, provided_version, op = part
+                        if op != '' and op != '=':
+                            msg = "Ignoring invalid provides in %s: %s (%s %s)" % (str(pkg_id), provided, op, version)
+                            self.log(msg, type='W')
+                            continue
+                        provided = intern(provided)
+                        provided_version = intern(provided_version)
+                        part = (provided, provided_version, intern(op))
+                        nprov.append(part)
+                provides = nprov
+            else:
+                provides = []
+
             dpkg = [version,
                     intern(get_field('Section')),
                     source,
@@ -686,7 +709,7 @@ class Britney(object):
                     get_field('Multi-Arch'),
                     deps,
                     ', '.join(final_conflicts_list) or None,
-                    get_field('Provides'),
+                    provides,
                     ess,
                    ]
 
@@ -704,28 +727,6 @@ class Britney(object):
             else:
                 srcdist[source] = [source_version, 'faux', [pkg_id], None, True]
 
-            if dpkg[PROVIDES]:
-                parts = apt_pkg.parse_depends(dpkg[PROVIDES], False)
-                nprov = []
-                for or_clause in parts:
-                    if len(or_clause) != 1:
-                        msg = "Ignoring invalid provides in %s: Alternatives [%s]" % (str(pkg_id), str(or_clause))
-                        self.log(msg, type='W')
-                        continue
-                    for part in or_clause:
-                        provided, provided_version, op = part
-                        if op != '' and op != '=':
-                            msg = "Ignoring invalid provides in %s: %s (%s %s)" % (str(pkg_id), provided, op, version)
-                            self.log(msg, type='W')
-                            continue
-                        provided = intern(provided)
-                        provided_version = intern(provided_version)
-                        part = (provided, provided_version, intern(op))
-                        nprov.append(part)
-                dpkg[PROVIDES] = nprov
-            else:
-                dpkg[PROVIDES] = []
-
             # add the resulting dictionary to the package list
             packages[pkg] = dpkg
             if pkg_id in all_binaries: