package common

import (
	"regexp"
)

// RepositoryNameComponentRegexp restricts registtry path components names to
// start with at least two letters or numbers, with following parts able to
// separated by one period, dash or underscore.
var RepositoryNameComponentRegexp = regexp.MustCompile(`[a-z0-9]{2,}(?:[._-][a-z0-9]+)*`)

// RepositoryNameRegexp builds on RepositoryNameComponentRegexp to allow 2 to
// 5 path components, separated by a forward slash.
var RepositoryNameRegexp = regexp.MustCompile(`(?:` + RepositoryNameComponentRegexp.String() + `/){1,4}` + RepositoryNameComponentRegexp.String())

// TagNameRegexp matches valid tag names. From docker/docker:graph/tags.go.
var TagNameRegexp = regexp.MustCompile(`[\w][\w.-]{0,127}`)

// TODO(stevvooe): Contribute these exports back to core, so they are shared.

package common

import (
	"regexp"
)

// RepositoryNameComponentRegexp restricts registtry path components names to
// start with at least two letters or numbers, with following parts able to
// separated by one period, dash or underscore.
var RepositoryNameComponentRegexp = regexp.MustCompile(`[a-z0-9](?:[a-z0-9]+[._-]?)*[a-z0-9]`)

// RepositoryNameRegexp builds on RepositoryNameComponentRegexp to allow 2 to
// 5 path components, separated by a forward slash.
var RepositoryNameRegexp = regexp.MustCompile(`(?:` + RepositoryNameComponentRegexp.String() + `/){1,4}` + RepositoryNameComponentRegexp.String())

// TagNameRegexp matches valid tag names. From docker/docker:graph/tags.go.
var TagNameRegexp = regexp.MustCompile(`[\w][\w.-]{0,127}`)

// TODO(stevvooe): Contribute these exports back to core, so they are shared.

--- 
+++ 
@@ -7,7 +7,7 @@
 // RepositoryNameComponentRegexp restricts registtry path components names to
 // start with at least two letters or numbers, with following parts able to
 // separated by one period, dash or underscore.
-var RepositoryNameComponentRegexp = regexp.MustCompile(`[a-z0-9](?:[a-z0-9]+[._-]?)*[a-z0-9]`)
+var RepositoryNameComponentRegexp = regexp.MustCompile(`[a-z0-9]{2,}(?:[._-][a-z0-9]+)*`)
 
 // RepositoryNameRegexp builds on RepositoryNameComponentRegexp to allow 2 to
 // 5 path components, separated by a forward slash.
Simplify repository name component regexp
