Remove max repository component length restriction

Fixes #241

Signed-off-by: Andy Goldstein <agoldste@redhat.com>

registry/api/v2/names.go

@@ -15,35 +15,27 @@ const (
 	// single repository name slash-delimited component
 	RepositoryNameComponentMinLength = 2
 
-	// RepositoryNameComponentMaxLength is the maximum number of characters in a
-	// single repository name slash-delimited component
-	RepositoryNameComponentMaxLength = 30
-
 	// RepositoryNameMinComponents is the minimum number of slash-delimited
 	// components that a repository name must have
 	RepositoryNameMinComponents = 1
 
-	// RepositoryNameMaxComponents is the maximum number of slash-delimited
-	// components that a repository name must have
-	RepositoryNameMaxComponents = 5
-
 	// RepositoryNameTotalLengthMax is the maximum total number of characters in
 	// a repository name
 	RepositoryNameTotalLengthMax = 255
 )
 
-// RepositoryNameComponentRegexp restricts registtry path components names to
+// RepositoryNameComponentRegexp restricts registry path component names to
-// start with at least two letters or numbers, with following parts able to
+// start with at least one letter or number, with following parts able to
-// separated by one period, dash or underscore.
+// be separated by one period, dash or underscore.
 var RepositoryNameComponentRegexp = regexp.MustCompile(`[a-z0-9]+(?:[._-][a-z0-9]+)*`)
 
 // RepositoryNameComponentAnchoredRegexp is the version of
 // RepositoryNameComponentRegexp which must completely match the content
 var RepositoryNameComponentAnchoredRegexp = regexp.MustCompile(`^` + RepositoryNameComponentRegexp.String() + `$`)
 
-// RepositoryNameRegexp builds on RepositoryNameComponentRegexp to allow 1 to
+// RepositoryNameRegexp builds on RepositoryNameComponentRegexp to allow
-// 5 path components, separated by a forward slash.
+// multiple path components, separated by a forward slash.
-var RepositoryNameRegexp = regexp.MustCompile(`(?:` + RepositoryNameComponentRegexp.String() + `/){0,4}` + RepositoryNameComponentRegexp.String())
+var RepositoryNameRegexp = regexp.MustCompile(`(?:` + RepositoryNameComponentRegexp.String() + `/)*` + RepositoryNameComponentRegexp.String())
 
 // TagNameRegexp matches valid tag names. From docker/docker:graph/tags.go.
 var TagNameRegexp = regexp.MustCompile(`[\w][\w.-]{0,127}`)
@@ -56,19 +48,10 @@ var (
 	// RepositoryNameComponentMinLength
 	ErrRepositoryNameComponentShort = fmt.Errorf("respository name component must be %v or more characters", RepositoryNameComponentMinLength)
 
-	// ErrRepositoryNameComponentLong is returned when a repository name
-	// contains a component which is longer than
-	// RepositoryNameComponentMaxLength
-	ErrRepositoryNameComponentLong = fmt.Errorf("respository name component must be %v characters or less", RepositoryNameComponentMaxLength)
-
 	// ErrRepositoryNameMissingComponents is returned when a repository name
 	// contains fewer than RepositoryNameMinComponents components
 	ErrRepositoryNameMissingComponents = fmt.Errorf("repository name must have at least %v components", RepositoryNameMinComponents)
 
-	// ErrRepositoryNameTooManyComponents is returned when a repository name
-	// contains more than RepositoryNameMaxComponents components
-	ErrRepositoryNameTooManyComponents = fmt.Errorf("repository name %v or less components", RepositoryNameMaxComponents)
-
 	// ErrRepositoryNameLong is returned when a repository name is longer than
 	// RepositoryNameTotalLengthMax
 	ErrRepositoryNameLong = fmt.Errorf("repository name must not be more than %v characters", RepositoryNameTotalLengthMax)
@@ -103,19 +86,11 @@ func ValidateRespositoryName(name string) error {
 		return ErrRepositoryNameMissingComponents
 	}
 
-	if len(components) > RepositoryNameMaxComponents {
-		return ErrRepositoryNameTooManyComponents
-	}
-
 	for _, component := range components {
 		if len(component) < RepositoryNameComponentMinLength {
 			return ErrRepositoryNameComponentShort
 		}
 
-		if len(component) > RepositoryNameComponentMaxLength {
-			return ErrRepositoryNameComponentLong
-		}
-
 		if !RepositoryNameComponentAnchoredRegexp.MatchString(component) {
 			return ErrRepositoryNameComponentInvalid
 		}

registry/api/v2/names_test.go

@@ -1,6 +1,7 @@
 package v2
 
 import (
+	"strings"
 	"testing"
 )
 
@@ -23,7 +24,6 @@ func TestRepositoryNameRegexp(t *testing.T) {
 		},
 		{
 			input: "aa/aa/aa/aa/aa/aa/aa/aa/aa/bb/bb/bb/bb/bb/bb",
-			err:   ErrRepositoryNameTooManyComponents,
 		},
 		{
 			input: "aa/aa/bb/bb/bb",
@@ -66,6 +66,13 @@ func TestRepositoryNameRegexp(t *testing.T) {
 			input: "a-/a/a/a",
 			err:   ErrRepositoryNameComponentInvalid,
 		},
+		{
+			input: strings.Repeat("a", 255),
+		},
+		{
+			input: strings.Repeat("a", 256),
+			err:   ErrRepositoryNameLong,
+		},
 	} {
 
 		failf := func(format string, v ...interface{}) {