reimplement and simplify mirror:// method

Embedding an entire acquire stack and HTTP logic in the mirror method
made it rather heavy weight and fragile. This reimplement goes the other
way by doing only the bare minimum in the method itself and instead
redirect the actual download of files to their proper methods.

The reimplementation drops the (in the real world) unused query-string
feature as it isn't really implementable in the new architecture.

1 files changed, 10 insertions, 0 deletions

diff --git a/methods/aptmethod.h b/methods/aptmethod.h
index 88d325cba..331411571 100644
--- a/methods/aptmethod.h
+++ b/methods/aptmethod.h
@@ -448,6 +448,16 @@ protected:
       return true;
    }
 
+   // This is a copy of #pkgAcqMethod::Dequeue which is private & hidden
+   void Dequeue()
+   {
+      FetchItem const *const Tmp = Queue;
+      Queue = Queue->Next;
+      if (Tmp == QueueBack)
+	 QueueBack = Queue;
+      delete Tmp;
+   }
+
    aptMethod(std::string &&Binary, char const *const Ver, unsigned long const Flags) APT_NONNULL(3)
        : pkgAcqMethod(Ver, Flags), Binary(Binary), SeccompFlags(0), methodNames({Binary})
    {