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// Copyright 2018 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package git
import (
"regexp"
"strings"
"code.gitea.io/gitea/modules/util"
)
const (
// RemotePrefix is the base directory of the remotes information of git.
RemotePrefix = "refs/remotes/"
// PullPrefix is the base directory of the pull information of git.
PullPrefix = "refs/pull/"
)
// refNamePatternInvalid is regular expression with unallowed characters in git reference name
// They cannot have ASCII control characters (i.e. bytes whose values are lower than \040, or \177 DEL), space, tilde ~, caret ^, or colon : anywhere.
// They cannot have question-mark ?, asterisk *, or open bracket [ anywhere
var refNamePatternInvalid = regexp.MustCompile(
`[\000-\037\177 \\~^:?*[]|` + // No absolutely invalid characters
`(?:^[/.])|` + // Not HasPrefix("/") or "."
`(?:/\.)|` + // no "/."
`(?:\.lock$)|(?:\.lock/)|` + // No ".lock/"" or ".lock" at the end
`(?:\.\.)|` + // no ".." anywhere
`(?://)|` + // no "//" anywhere
`(?:@{)|` + // no "@{"
`(?:[/.]$)|` + // no terminal '/' or '.'
`(?:^@$)`) // Not "@"
// IsValidRefPattern ensures that the provided string could be a valid reference
func IsValidRefPattern(name string) bool {
return !refNamePatternInvalid.MatchString(name)
}
func SanitizeRefPattern(name string) string {
return refNamePatternInvalid.ReplaceAllString(name, "_")
}
// Reference represents a Git ref.
type Reference struct {
Name string
repo *Repository
Object ObjectID // The id of this commit object
Type string
}
// Commit return the commit of the reference
func (ref *Reference) Commit() (*Commit, error) {
return ref.repo.getCommit(ref.Object)
}
// ShortName returns the short name of the reference
func (ref *Reference) ShortName() string {
return RefName(ref.Name).ShortName()
}
// RefGroup returns the group type of the reference
func (ref *Reference) RefGroup() string {
return RefName(ref.Name).RefGroup()
}
// ForPrefix special ref to create a pull request: refs/for/<target-branch>/<topic-branch>
// or refs/for/<targe-branch> -o topic='<topic-branch>'
const ForPrefix = "refs/for/"
// TODO: /refs/for-review for suggest change interface
// RefName represents a full git reference name
type RefName string
func RefNameFromBranch(shortName string) RefName {
return RefName(BranchPrefix + shortName)
}
func RefNameFromTag(shortName string) RefName {
return RefName(TagPrefix + shortName)
}
func (ref RefName) String() string {
return string(ref)
}
func (ref RefName) IsBranch() bool {
return strings.HasPrefix(string(ref), BranchPrefix)
}
func (ref RefName) IsTag() bool {
return strings.HasPrefix(string(ref), TagPrefix)
}
func (ref RefName) IsRemote() bool {
return strings.HasPrefix(string(ref), RemotePrefix)
}
func (ref RefName) IsPull() bool {
return strings.HasPrefix(string(ref), PullPrefix) && strings.IndexByte(string(ref)[len(PullPrefix):], '/') > -1
}
func (ref RefName) IsFor() bool {
return strings.HasPrefix(string(ref), ForPrefix)
}
func (ref RefName) nameWithoutPrefix(prefix string) string {
if strings.HasPrefix(string(ref), prefix) {
return strings.TrimPrefix(string(ref), prefix)
}
return ""
}
// TagName returns simple tag name if it's an operation to a tag
func (ref RefName) TagName() string {
return ref.nameWithoutPrefix(TagPrefix)
}
// BranchName returns simple branch name if it's an operation to branch
func (ref RefName) BranchName() string {
return ref.nameWithoutPrefix(BranchPrefix)
}
// PullName returns the pull request name part of refs like refs/pull/<pull_name>/head
func (ref RefName) PullName() string {
refName := string(ref)
lastIdx := strings.LastIndexByte(refName[len(PullPrefix):], '/')
if strings.HasPrefix(refName, PullPrefix) && lastIdx > -1 {
return refName[len(PullPrefix) : lastIdx+len(PullPrefix)]
}
return ""
}
// ForBranchName returns the branch name part of refs like refs/for/<branch_name>
func (ref RefName) ForBranchName() string {
return ref.nameWithoutPrefix(ForPrefix)
}
func (ref RefName) RemoteName() string {
return ref.nameWithoutPrefix(RemotePrefix)
}
// ShortName returns the short name of the reference name
func (ref RefName) ShortName() string {
refName := string(ref)
if ref.IsBranch() {
return ref.BranchName()
}
if ref.IsTag() {
return ref.TagName()
}
if ref.IsRemote() {
return ref.RemoteName()
}
if ref.IsPull() {
return ref.PullName()
}
if ref.IsFor() {
return ref.ForBranchName()
}
return refName
}
// RefGroup returns the group type of the reference
// Using the name of the directory under .git/refs
func (ref RefName) RefGroup() string {
if ref.IsBranch() {
return "heads"
}
if ref.IsTag() {
return "tags"
}
if ref.IsRemote() {
return "remotes"
}
if ref.IsPull() {
return "pull"
}
if ref.IsFor() {
return "for"
}
return ""
}
// RefType returns the simple ref type of the reference, e.g. branch, tag
// It's differrent from RefGroup, which is using the name of the directory under .git/refs
// Here we using branch but not heads, using tag but not tags
func (ref RefName) RefType() string {
var refType string
if ref.IsBranch() {
refType = "branch"
} else if ref.IsTag() {
refType = "tag"
}
return refType
}
// RefURL returns the absolute URL for a ref in a repository
func RefURL(repoURL, ref string) string {
refFullName := RefName(ref)
refName := util.PathEscapeSegments(refFullName.ShortName())
switch {
case refFullName.IsBranch():
return repoURL + "/src/branch/" + refName
case refFullName.IsTag():
return repoURL + "/src/tag/" + refName
case !ObjectFormatFromID(Sha1).IsValid(ref):
// assume they mean a branch
return repoURL + "/src/branch/" + refName
default:
return repoURL + "/src/commit/" + refName
}
}
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