From d262a131cc81925b5ee5e827f3a88ffa8b486377 Mon Sep 17 00:00:00 2001
From: Andrey Smirnov <Smirnov.Andrey@gmail.com>
Date: Thu, 10 Jul 2014 21:16:30 +0400
Subject: [PATCH] Preparation for query matching: introduce Regexp +
 PatternMatch.

---
 deb/package.go      |  5 +++++
 deb/package_test.go | 11 +++++++++++
 deb/version.go      |  6 ++++++
 3 files changed, 22 insertions(+)

diff --git a/deb/package.go b/deb/package.go
index 01b638dd..c9abe938 100644
--- a/deb/package.go
+++ b/deb/package.go
@@ -224,6 +224,11 @@ func (p *Package) MatchesDependency(dep Dependency) bool {
 		return r <= 0
 	case VersionGreaterOrEqual:
 		return r >= 0
+	case VersionPatternMatch:
+		matched, err := filepath.Match(dep.Version, p.Version)
+		return err == nil && matched
+	case VersionRegexp:
+		panic("regexp matching not implemented yet")
 	}
 
 	panic("unknown relation")
diff --git a/deb/package_test.go b/deb/package_test.go
index 9f967ec7..d2c45721 100644
--- a/deb/package_test.go
+++ b/deb/package_test.go
@@ -207,6 +207,17 @@ func (s *PackageSuite) TestMatchesDependency(c *C) {
 	// <=
 	c.Check(p.MatchesDependency(Dependency{Pkg: "alien-arena-common", Architecture: "i386", Relation: VersionLessOrEqual, Version: "7.40-2"}), Equals, true)
 	c.Check(p.MatchesDependency(Dependency{Pkg: "alien-arena-common", Architecture: "i386", Relation: VersionLessOrEqual, Version: "7.40-1"}), Equals, false)
+
+	// %
+	c.Check(p.MatchesDependency(Dependency{Pkg: "alien-arena-common", Architecture: "i386", Relation: VersionPatternMatch, Version: "7.40-*"}), Equals, true)
+	c.Check(p.MatchesDependency(Dependency{Pkg: "alien-arena-common", Architecture: "i386", Relation: VersionPatternMatch, Version: "7.40-[2]"}), Equals, true)
+	c.Check(p.MatchesDependency(Dependency{Pkg: "alien-arena-common", Architecture: "i386", Relation: VersionPatternMatch, Version: "7.40-[2"}), Equals, false)
+	c.Check(p.MatchesDependency(Dependency{Pkg: "alien-arena-common", Architecture: "i386", Relation: VersionPatternMatch, Version: "7.40-[34]"}), Equals, false)
+
+	// %
+	c.Check(func() {
+		p.MatchesDependency(Dependency{Pkg: "alien-arena-common", Architecture: "i386", Relation: VersionRegexp, Version: "7\\.40-.*"})
+	}, Panics, "regexp matching not implemented yet")
 }
 
 func (s *PackageSuite) TestGetDependencies(c *C) {
diff --git a/deb/version.go b/deb/version.go
index e7b11584..048576bc 100644
--- a/deb/version.go
+++ b/deb/version.go
@@ -178,6 +178,8 @@ const (
 	VersionEqual
 	VersionGreaterOrEqual
 	VersionGreater
+	VersionPatternMatch
+	VersionRegexp
 )
 
 // Dependency is a parsed version of Debian dependency to package
@@ -207,6 +209,10 @@ func (d *Dependency) String() string {
 		rel = ">="
 	case VersionLessOrEqual:
 		rel = "<="
+	case VersionPatternMatch:
+		rel = "%"
+	case VersionRegexp:
+		rel = "~"
 	case VersionDontCare:
 		return fmt.Sprintf("%s [%s]", d.Pkg, d.Architecture)
 	}