mirror of
https://codeberg.org/forgejo/forgejo.git
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## Purpose This is a refactor toward building an abstraction over managing git repositories. Afterwards, it does not matter anymore if they are stored on the local disk or somewhere remote. ## What this PR changes We used `git.OpenRepository` everywhere previously. Now, we should split them into two distinct functions: Firstly, there are temporary repositories which do not change: ```go git.OpenRepository(ctx, diskPath) ``` Gitea managed repositories having a record in the database in the `repository` table are moved into the new package `gitrepo`: ```go gitrepo.OpenRepository(ctx, repo_model.Repo) ``` Why is `repo_model.Repository` the second parameter instead of file path? Because then we can easily adapt our repository storage strategy. The repositories can be stored locally, however, they could just as well be stored on a remote server. ## Further changes in other PRs - A Git Command wrapper on package `gitrepo` could be created. i.e. `NewCommand(ctx, repo_model.Repository, commands...)`. `git.RunOpts{Dir: repo.RepoPath()}`, the directory should be empty before invoking this method and it can be filled in the function only. #28940 - Remove the `RepoPath()`/`WikiPath()` functions to reduce the possibility of mistakes. --------- Co-authored-by: delvh <dev.lh@web.de>
194 lines
5 KiB
Go
194 lines
5 KiB
Go
// Copyright 2015 The Gogs Authors. All rights reserved.
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// Copyright 2018 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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//go:build !gogit
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package git
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import (
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"bufio"
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"bytes"
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"context"
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"io"
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"strings"
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"code.gitea.io/gitea/modules/log"
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)
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// IsObjectExist returns true if given reference exists in the repository.
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func (repo *Repository) IsObjectExist(name string) bool {
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if name == "" {
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return false
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}
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wr, rd, cancel := repo.CatFileBatchCheck(repo.Ctx)
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defer cancel()
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_, err := wr.Write([]byte(name + "\n"))
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if err != nil {
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log.Debug("Error writing to CatFileBatchCheck %v", err)
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return false
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}
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sha, _, _, err := ReadBatchLine(rd)
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return err == nil && bytes.HasPrefix(sha, []byte(strings.TrimSpace(name)))
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}
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// IsReferenceExist returns true if given reference exists in the repository.
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func (repo *Repository) IsReferenceExist(name string) bool {
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if name == "" {
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return false
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}
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wr, rd, cancel := repo.CatFileBatchCheck(repo.Ctx)
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defer cancel()
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_, err := wr.Write([]byte(name + "\n"))
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if err != nil {
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log.Debug("Error writing to CatFileBatchCheck %v", err)
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return false
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}
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_, _, _, err = ReadBatchLine(rd)
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return err == nil
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}
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// IsBranchExist returns true if given branch exists in current repository.
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func (repo *Repository) IsBranchExist(name string) bool {
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if repo == nil || name == "" {
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return false
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}
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return repo.IsReferenceExist(BranchPrefix + name)
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}
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// GetBranchNames returns branches from the repository, skipping "skip" initial branches and
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// returning at most "limit" branches, or all branches if "limit" is 0.
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func (repo *Repository) GetBranchNames(skip, limit int) ([]string, int, error) {
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return callShowRef(repo.Ctx, repo.Path, BranchPrefix, TrustedCmdArgs{BranchPrefix, "--sort=-committerdate"}, skip, limit)
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}
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// WalkReferences walks all the references from the repository
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// refType should be empty, ObjectTag or ObjectBranch. All other values are equivalent to empty.
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func (repo *Repository) WalkReferences(refType ObjectType, skip, limit int, walkfn func(sha1, refname string) error) (int, error) {
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var args TrustedCmdArgs
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switch refType {
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case ObjectTag:
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args = TrustedCmdArgs{TagPrefix, "--sort=-taggerdate"}
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case ObjectBranch:
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args = TrustedCmdArgs{BranchPrefix, "--sort=-committerdate"}
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}
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return WalkShowRef(repo.Ctx, repo.Path, args, skip, limit, walkfn)
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}
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// callShowRef return refs, if limit = 0 it will not limit
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func callShowRef(ctx context.Context, repoPath, trimPrefix string, extraArgs TrustedCmdArgs, skip, limit int) (branchNames []string, countAll int, err error) {
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countAll, err = WalkShowRef(ctx, repoPath, extraArgs, skip, limit, func(_, branchName string) error {
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branchName = strings.TrimPrefix(branchName, trimPrefix)
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branchNames = append(branchNames, branchName)
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return nil
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})
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return branchNames, countAll, err
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}
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func WalkShowRef(ctx context.Context, repoPath string, extraArgs TrustedCmdArgs, skip, limit int, walkfn func(sha1, refname string) error) (countAll int, err error) {
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stdoutReader, stdoutWriter := io.Pipe()
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defer func() {
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_ = stdoutReader.Close()
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_ = stdoutWriter.Close()
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}()
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go func() {
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stderrBuilder := &strings.Builder{}
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args := TrustedCmdArgs{"for-each-ref", "--format=%(objectname) %(refname)"}
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args = append(args, extraArgs...)
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err := NewCommand(ctx, args...).Run(&RunOpts{
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Dir: repoPath,
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Stdout: stdoutWriter,
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Stderr: stderrBuilder,
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})
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if err != nil {
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if stderrBuilder.Len() == 0 {
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_ = stdoutWriter.Close()
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return
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}
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_ = stdoutWriter.CloseWithError(ConcatenateError(err, stderrBuilder.String()))
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} else {
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_ = stdoutWriter.Close()
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}
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}()
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i := 0
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bufReader := bufio.NewReader(stdoutReader)
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for i < skip {
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_, isPrefix, err := bufReader.ReadLine()
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if err == io.EOF {
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return i, nil
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}
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if err != nil {
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return 0, err
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}
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if !isPrefix {
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i++
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}
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}
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for limit == 0 || i < skip+limit {
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// The output of show-ref is simply a list:
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// <sha> SP <ref> LF
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sha, err := bufReader.ReadString(' ')
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if err == io.EOF {
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return i, nil
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}
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if err != nil {
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return 0, err
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}
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branchName, err := bufReader.ReadString('\n')
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if err == io.EOF {
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// This shouldn't happen... but we'll tolerate it for the sake of peace
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return i, nil
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}
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if err != nil {
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return i, err
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}
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if len(branchName) > 0 {
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branchName = branchName[:len(branchName)-1]
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}
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if len(sha) > 0 {
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sha = sha[:len(sha)-1]
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}
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err = walkfn(sha, branchName)
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if err != nil {
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return i, err
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}
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i++
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}
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// count all refs
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for limit != 0 {
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_, isPrefix, err := bufReader.ReadLine()
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if err == io.EOF {
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return i, nil
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}
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if err != nil {
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return 0, err
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}
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if !isPrefix {
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i++
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}
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}
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return i, nil
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}
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// GetRefsBySha returns all references filtered with prefix that belong to a sha commit hash
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func (repo *Repository) GetRefsBySha(sha, prefix string) ([]string, error) {
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var revList []string
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_, err := WalkShowRef(repo.Ctx, repo.Path, nil, 0, 0, func(walkSha, refname string) error {
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if walkSha == sha && strings.HasPrefix(refname, prefix) {
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revList = append(revList, refname)
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}
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return nil
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})
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return revList, err
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}
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