From cfc08ae7e3fde48a51764f5293cefbc193a53860 Mon Sep 17 00:00:00 2001
From: Martin Atkins <mart@degeneration.co.uk>
Date: Thu, 20 Apr 2017 18:13:54 -0700
Subject: [PATCH] plugin/discovery: provide an AllVersions set

Various implied dependencies will accept all versions, so this is
convenient for populating dependency data structures for such implied
dependencies.
---
 plugin/discovery/version_set.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/plugin/discovery/version_set.go b/plugin/discovery/version_set.go
index 951000b20..3dce045b4 100644
--- a/plugin/discovery/version_set.go
+++ b/plugin/discovery/version_set.go
@@ -37,6 +37,15 @@ type VersionSet struct {
 	raw version.Constraints
 }
 
+// AllVersions is a VersionSet containing all versions
+var AllVersions VersionSet
+
+func init() {
+	AllVersions = VersionSet{
+		raw: make(version.Constraints, 0),
+	}
+}
+
 // Has returns true if the given version is in the receiving set.
 func (s VersionSet) Has(v Version) bool {
 	return s.raw.Check(v.raw)