From 08762e0e4e2923360339eeb4d8ed26a00d7f1de5 Mon Sep 17 00:00:00 2001
From: Julian Andres Klode <julian.klode@canonical.com>
Date: Thu, 15 Aug 2019 13:35:01 +0200
Subject: Add ?essential pattern

This matches all packages where at least one of the versions
is marked essential; or well, whenver apt considers a package
essential.
---
 apt-pkg/cachefilter-patterns.h | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'apt-pkg/cachefilter-patterns.h')

diff --git a/apt-pkg/cachefilter-patterns.h b/apt-pkg/cachefilter-patterns.h
index c219e5bcd..17f1fc752 100644
--- a/apt-pkg/cachefilter-patterns.h
+++ b/apt-pkg/cachefilter-patterns.h
@@ -158,6 +158,13 @@ struct PackageIsGarbage : public PackageMatcher
       return (*Cache)[Pkg].Garbage;
    }
 };
+struct PackageIsEssential : public PackageMatcher
+{
+   bool operator()(pkgCache::PkgIterator const &Pkg) override
+   {
+      return (Pkg->Flags & pkgCache::Flag::Essential) != 0;
+   }
+};
 
 struct PackageIsInstalled : public PackageMatcher
 {
-- 
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