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// Copyright 2018 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package git
import (
"bufio"
"context"
"fmt"
"io"
"strings"
"code.gitea.io/gitea/modules/util"
)
// GetRefs returns all references of the repository.
func (repo *Repository) GetRefs() ([]*Reference, error) {
return repo.GetRefsFiltered("")
}
// ListOccurrences lists all refs of the given refType the given commit appears in sorted by creation date DESC
// refType should only be a literal "branch" or "tag" and nothing else
func (repo *Repository) ListOccurrences(ctx context.Context, refType, commitSHA string) ([]string, error) {
cmd := NewCommand(ctx)
if refType == "branch" {
cmd.AddArguments("branch")
} else if refType == "tag" {
cmd.AddArguments("tag")
} else {
return nil, util.NewInvalidArgumentErrorf(`can only use "branch" or "tag" for refType, but got %q`, refType)
}
stdout, _, err := cmd.AddArguments("--no-color", "--sort=-creatordate", "--contains").AddDynamicArguments(commitSHA).RunStdString(&RunOpts{Dir: repo.Path})
if err != nil {
return nil, err
}
refs := strings.Split(strings.TrimSpace(stdout), "\n")
if refType == "branch" {
return parseBranches(refs), nil
}
return parseTags(refs), nil
}
func parseBranches(refs []string) []string {
results := make([]string, 0, len(refs))
for _, ref := range refs {
if strings.HasPrefix(ref, "* ") { // current branch (main branch)
results = append(results, ref[len("* "):])
} else if strings.HasPrefix(ref, " ") { // all other branches
results = append(results, ref[len(" "):])
} else if ref != "" {
results = append(results, ref)
}
}
return results
}
func parseTags(refs []string) []string {
results := make([]string, 0, len(refs))
for _, ref := range refs {
if ref != "" {
results = append(results, ref)
}
}
return results
}
// ExpandRef expands any partial reference to its full form
func (repo *Repository) ExpandRef(ref string) (string, error) {
if strings.HasPrefix(ref, "refs/") {
return ref, nil
} else if strings.HasPrefix(ref, "tags/") || strings.HasPrefix(ref, "heads/") {
return "refs/" + ref, nil
} else if repo.IsTagExist(ref) {
return TagPrefix + ref, nil
} else if repo.IsBranchExist(ref) {
return BranchPrefix + ref, nil
} else if repo.IsCommitExist(ref) {
return ref, nil
}
return "", fmt.Errorf("could not expand reference '%s'", ref)
}
// GetRefsFiltered returns all references of the repository that matches patterm exactly or starting with.
func (repo *Repository) GetRefsFiltered(pattern string) ([]*Reference, error) {
stdoutReader, stdoutWriter := io.Pipe()
defer func() {
_ = stdoutReader.Close()
_ = stdoutWriter.Close()
}()
go func() {
stderrBuilder := &strings.Builder{}
err := NewCommand(repo.Ctx, "for-each-ref").Run(&RunOpts{
Dir: repo.Path,
Stdout: stdoutWriter,
Stderr: stderrBuilder,
})
if err != nil {
_ = stdoutWriter.CloseWithError(ConcatenateError(err, stderrBuilder.String()))
} else {
_ = stdoutWriter.Close()
}
}()
refs := make([]*Reference, 0)
bufReader := bufio.NewReader(stdoutReader)
for {
// The output of for-each-ref is simply a list:
// <sha> SP <type> TAB <ref> LF
sha, err := bufReader.ReadString(' ')
if err == io.EOF {
break
}
if err != nil {
return nil, err
}
sha = sha[:len(sha)-1]
typ, err := bufReader.ReadString('\t')
if err == io.EOF {
// This should not happen, but we'll tolerate it
break
}
if err != nil {
return nil, err
}
typ = typ[:len(typ)-1]
refName, err := bufReader.ReadString('\n')
if err == io.EOF {
// This should not happen, but we'll tolerate it
break
}
if err != nil {
return nil, err
}
refName = refName[:len(refName)-1]
// refName cannot be HEAD but can be remotes or stash
if strings.HasPrefix(refName, RemotePrefix) || refName == "/refs/stash" {
continue
}
if pattern == "" || strings.HasPrefix(refName, pattern) {
r := &Reference{
Name: refName,
Object: MustIDFromString(sha),
Type: typ,
repo: repo,
}
refs = append(refs, r)
}
}
return refs, nil
}
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