From a5414e56403537678d5be87acf59c37a05f55719 Mon Sep 17 00:00:00 2001
From: David Kalnischkies <david@kalnischkies.de>
Date: Mon, 24 Feb 2014 23:10:25 +0100
Subject: add default and override handling for Cnf::FindVector

Automatically handle the override of list options via its parent value
which can even be a comma-separated list of values. It also adds an easy
way of providing a default for the list.
---
 apt-pkg/contrib/configuration.cc | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

(limited to 'apt-pkg/contrib/configuration.cc')

diff --git a/apt-pkg/contrib/configuration.cc b/apt-pkg/contrib/configuration.cc
index 4ef4663c0..8eddd56d4 100644
--- a/apt-pkg/contrib/configuration.cc
+++ b/apt-pkg/contrib/configuration.cc
@@ -21,6 +21,7 @@
 #include <apt-pkg/error.h>
 #include <apt-pkg/strutl.h>
 #include <apt-pkg/fileutl.h>
+#include <apt-pkg/init.h>
 
 #include <vector>
 #include <fstream>
@@ -246,12 +247,18 @@ string Configuration::FindDir(const char *Name,const char *Default) const
 // Configuration::FindVector - Find a vector of values			/*{{{*/
 // ---------------------------------------------------------------------
 /* Returns a vector of config values under the given item */
-vector<string> Configuration::FindVector(const char *Name) const
+#if (APT_PKG_MAJOR >= 4 && APT_PKG_MINOR < 13)
+vector<string> Configuration::FindVector(const char *Name) const { return FindVector(Name, ""); }
+#endif
+vector<string> Configuration::FindVector(const char *Name, std::string const &Default) const
 {
    vector<string> Vec;
    const Item *Top = Lookup(Name);
    if (Top == NULL)
-      return Vec;
+      return VectorizeString(Default, ',');
+
+   if (Top->Value.empty() == false)
+      return VectorizeString(Top->Value, ',');
 
    Item *I = Top->Child;
    while(I != NULL)
@@ -259,6 +266,9 @@ vector<string> Configuration::FindVector(const char *Name) const
       Vec.push_back(I->Value);
       I = I->Next;
    }
+   if (Vec.empty() == true)
+      return VectorizeString(Default, ',');
+
    return Vec;
 }
 									/*}}}*/
-- 
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