From 506987d31fdd39673aa0cd4d3bd3dca519a1193e Mon Sep 17 00:00:00 2001
From: Andrey Smirnov <Smirnov.Andrey@gmail.com>
Date: Mon, 17 Feb 2014 20:52:37 +0400
Subject: [PATCH] Support version numbers like pkg (1.4)

---
 debian/version.go      | 19 ++++++++++++-------
 debian/version_test.go | 12 ++++++++++++
 2 files changed, 24 insertions(+), 7 deletions(-)

diff --git a/debian/version.go b/debian/version.go
index 2a580995..c6997e76 100644
--- a/debian/version.go
+++ b/debian/version.go
@@ -255,12 +255,17 @@ func ParseDependency(dep string) (d Dependency, err error) {
 
 	d.Pkg = strings.TrimSpace(dep[0:i])
 
-	rel := dep[i+1 : i+2]
-	if dep[i+2] == '>' || dep[i+2] == '<' || dep[i+2] == '=' {
-		rel += dep[i+2 : i+3]
-		d.Version = strings.TrimSpace(dep[i+3 : len(dep)-1])
+	rel := ""
+	if dep[i+1] == '>' || dep[i+1] == '<' || dep[i+1] == '=' {
+		rel += dep[i+1 : i+2]
+		if dep[i+2] == '>' || dep[i+2] == '<' || dep[i+2] == '=' {
+			rel += dep[i+2 : i+3]
+			d.Version = strings.TrimSpace(dep[i+3 : len(dep)-1])
+		} else {
+			d.Version = strings.TrimSpace(dep[i+2 : len(dep)-1])
+		}
 	} else {
-		d.Version = strings.TrimSpace(dep[i+2 : len(dep)-1])
+		d.Version = strings.TrimSpace(dep[i+1 : len(dep)-1])
 	}
 
 	switch rel {
@@ -272,10 +277,10 @@ func ParseDependency(dep string) (d Dependency, err error) {
 		d.Relation = VersionLess
 	case ">>":
 		d.Relation = VersionGreater
-	case "=":
+	case "", "=":
 		d.Relation = VersionEqual
 	default:
-		err = fmt.Errorf("relation unknown: %s", rel)
+		err = fmt.Errorf("relation unknown %#v in dependency %s", rel, dep)
 	}
 
 	return
diff --git a/debian/version_test.go b/debian/version_test.go
index 6b2e760e..844dc4ba 100644
--- a/debian/version_test.go
+++ b/debian/version_test.go
@@ -112,6 +112,18 @@ func (s *VersionSuite) TestParseDependency(c *C) {
 	c.Check(d.Relation, Equals, VersionGreater)
 	c.Check(d.Version, Equals, "1.6")
 
+	d, e = ParseDependency("dpkg(1.6)")
+	c.Check(e, IsNil)
+	c.Check(d.Pkg, Equals, "dpkg")
+	c.Check(d.Relation, Equals, VersionEqual)
+	c.Check(d.Version, Equals, "1.6")
+
+	d, e = ParseDependency("dpkg ( 1.6)")
+	c.Check(e, IsNil)
+	c.Check(d.Pkg, Equals, "dpkg")
+	c.Check(d.Relation, Equals, VersionEqual)
+	c.Check(d.Version, Equals, "1.6")
+
 	d, e = ParseDependency("dpkg (> 1.6)")
 	c.Check(e, IsNil)
 	c.Check(d.Pkg, Equals, "dpkg")