add pattern to select packages by priority (closes: #989558)

2 files changed, 19 insertions, 0 deletions

diff --git a/apt-pkg/cachefilter-patterns.cc b/apt-pkg/cachefilter-patterns.cc
index 471e698d6..12d8ae748 100644
--- a/apt-pkg/cachefilter-patterns.cc
+++ b/apt-pkg/cachefilter-patterns.cc
@@ -56,6 +56,7 @@ static const constexpr struct
    {"n"_sv, "?name"_sv, true},
    {"o"_sv, "?obsolete"_sv, false},
    {"O"_sv, "?origin"_sv, true},
+   {"p"_sv, "?priority"_sv, true},
    {"s"_sv, "?section"_sv, true},
    {"e"_sv, "?source-package"_sv, true},
    {"T"_sv, "?true"_sv, false},
@@ -477,6 +478,8 @@ std::unique_ptr<APT::CacheFilter::Matcher> PatternParser::aPattern(std::unique_p
       return std::make_unique<Patterns::PackageReverseDepends>(aPattern(node->arguments[0]), pkgCache::Dep::Enhances);
    if (node->matches("?essential", 0, 0))
       return std::make_unique<Patterns::PackageIsEssential>();
+   if (node->matches("?priority", 1, 1))
+      return std::make_unique<Patterns::VersionIsPriority>(aWord(node->arguments[0]));
    if (node->matches("?exact-name", 1, 1))
       return std::make_unique<Patterns::PackageHasExactName>(aWord(node->arguments[0]));
    if (node->matches("?false", 0, 0))
diff --git a/apt-pkg/cachefilter-patterns.h b/apt-pkg/cachefilter-patterns.h
index e0c48dd12..d55cb6335 100644
--- a/apt-pkg/cachefilter-patterns.h
+++ b/apt-pkg/cachefilter-patterns.h
@@ -417,6 +417,22 @@ struct APT_HIDDEN VersionIsVersion : public VersionAnyMatcher
       return matcher(Ver.VerStr());
    }
 };
+
+struct APT_HIDDEN VersionIsPriority : public VersionAnyMatcher
+{
+   std::string name;
+   explicit VersionIsPriority(std::string name) : name(name) {}
+   bool operator()(pkgCache::VerIterator const &Ver) override
+   {
+      std::string Mapping[] = {"", "required","important","standard",
+                            "optional","extra"};
+      if (Ver->Priority > 0 && Ver->Priority < APT_ARRAY_SIZE(Mapping)) {
+         return name == Mapping[Ver->Priority];
+      }
+      return false;
+   }
+};
+
 } // namespace Patterns
 } // namespace Internal
 } // namespace APT