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util.go
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util.go
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// Copyright 2020-2022 Buf Technologies, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package bufmoduleref
import (
"fmt"
"strings"
)
// parseModuleReferenceComponents parses and returns the remote, owner, repository,
// and ref (branch or commit) from the given path.
func parseModuleReferenceComponents(path string) (remote string, owner string, repository string, ref string, err error) {
remote, owner, rest, err := parseModuleIdentityComponents(path)
if err != nil {
return "", "", "", "", newInvalidModuleReferenceStringError(path)
}
restSplit := strings.Split(rest, ":")
repository = strings.TrimSpace(restSplit[0])
if len(restSplit) == 1 {
return remote, owner, repository, "", nil
}
if len(restSplit) == 2 {
ref := strings.TrimSpace(restSplit[1])
if ref == "" {
return "", "", "", "", newInvalidModuleReferenceStringError(path)
}
return remote, owner, repository, ref, nil
}
return "", "", "", "", newInvalidModuleReferenceStringError(path)
}
func parseModuleIdentityComponents(path string) (remote string, owner string, repository string, err error) {
slashSplit := strings.Split(path, "/")
if len(slashSplit) != 3 {
return "", "", "", newInvalidModuleIdentityStringError(path)
}
remote = strings.TrimSpace(slashSplit[0])
if remote == "" {
return "", "", "", newInvalidModuleIdentityStringError(path)
}
owner = strings.TrimSpace(slashSplit[1])
if owner == "" {
return "", "", "", newInvalidModuleIdentityStringError(path)
}
repository = strings.TrimSpace(slashSplit[2])
if repository == "" {
return "", "", "", newInvalidModuleIdentityStringError(path)
}
return remote, owner, repository, nil
}
func modulePinLess(a ModulePin, b ModulePin) bool {
return modulePinCompareTo(a, b) < 0
}
// return -1 if less
// return 1 if greater
// return 0 if equal
func modulePinCompareTo(a ModulePin, b ModulePin) int {
if a == nil && b == nil {
return 0
}
if a == nil && b != nil {
return -1
}
if a != nil && b == nil {
return 1
}
if a.Remote() < b.Remote() {
return -1
}
if a.Remote() > b.Remote() {
return 1
}
if a.Owner() < b.Owner() {
return -1
}
if a.Owner() > b.Owner() {
return 1
}
if a.Repository() < b.Repository() {
return -1
}
if a.Repository() > b.Repository() {
return 1
}
if a.Branch() < b.Branch() {
return -1
}
if a.Branch() > b.Branch() {
return 1
}
if a.Commit() < b.Commit() {
return -1
}
if a.Commit() > b.Commit() {
return 1
}
if a.Digest() < b.Digest() {
return -1
}
if a.Digest() > b.Digest() {
return 1
}
if a.CreateTime().Before(b.CreateTime()) {
return -1
}
if a.CreateTime().After(b.CreateTime()) {
return 1
}
return 0
}
func newInvalidModuleOwnerStringError(s string) error {
return fmt.Errorf("module owner %q is invalid: must be in the form remote/owner", s)
}
func newInvalidModuleIdentityStringError(s string) error {
return fmt.Errorf("module identity %q is invalid: must be in the form remote/owner/repository", s)
}
func newInvalidModuleReferenceStringError(s string) error {
return fmt.Errorf("module reference %q is invalid: must be in the form remote/owner/repository:branch or remote/owner/repository:commit", s)
}