support lang= and target= sources.list options

We support arch= for a while, now we finally add lang= as well and as a
first simple way of controlling which targets to acquire also target=.

This asked for a redesign of the internal API of parsing and storing
information about 'deb' and 'deb-src' lines. As this API isn't visible
to the outside no damage done through.

Beside being a nice cleanup (= it actually does more in less lines) it
also provides us with a predictable order of architectures as provides
in the configuration rather than based on string sorting-order, so that
now the native architecture is parsed/displayed first. Observeable e.g.
in apt-get output.

1 files changed, 4 insertions, 4 deletions

diff --git a/apt-pkg/sourcelist.h b/apt-pkg/sourcelist.h
index e17ad6a9a..4f42b3e91 100644
--- a/apt-pkg/sourcelist.h
+++ b/apt-pkg/sourcelist.h
@@ -66,8 +66,8 @@ class pkgSourceList
       static unsigned long GlobalListLen;
       static Type *GetType(const char *Type) APT_PURE;
 
-      const char *Name;
-      const char *Label;
+      char const * const Name;
+      char const * const Label;
 
       bool FixupURI(std::string &URI) const;
       virtual bool ParseStanza(std::vector<metaIndex *> &List,
@@ -80,8 +80,8 @@ class pkgSourceList
       virtual bool CreateItem(std::vector<metaIndex *> &List,std::string const &URI,
 			      std::string const &Dist,std::string const &Section,
 			      std::map<std::string, std::string> const &Options) const = 0;
-      Type();
-      virtual ~Type() {};
+      Type(char const * const Name, char const * const Label);
+      virtual ~Type();
    };
 
    typedef std::vector<metaIndex *>::const_iterator const_iterator;