初始提交: Gitea 项目代码

modules/git/repo_branch_nogogit.go

@@ -0,0 +1,184 @@
+// Copyright 2015 The Gogs Authors. All rights reserved.
+// Copyright 2018 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build !gogit
+
+package git
+
+import (
+	"bufio"
+	"context"
+	"io"
+	"strings"
+
+	"gitea.dev/modules/git/gitcmd"
+	"gitea.dev/modules/log"
+)
+
+// IsObjectExist returns true if the given object exists in the repository.
+// FIXME: this function doesn't seem right, it is only used by GarbageCollectLFSMetaObjectsForRepo
+func (repo *Repository) IsObjectExist(name string) bool {
+	if name == "" {
+		return false
+	}
+
+	batch, cancel, err := repo.CatFileBatch(repo.Ctx)
+	if err != nil {
+		log.Debug("Error opening CatFileBatch %v", err)
+		return false
+	}
+	defer cancel()
+	info, err := batch.QueryInfo(name)
+	if err != nil {
+		log.Debug("Error checking object info %v", err)
+		return false
+	}
+	return strings.HasPrefix(info.ID, name) // FIXME: this logic doesn't seem right, why "HasPrefix"
+}
+
+// IsReferenceExist returns true if given reference exists in the repository.
+func (repo *Repository) IsReferenceExist(name string) bool {
+	if name == "" {
+		return false
+	}
+
+	batch, cancel, err := repo.CatFileBatch(repo.Ctx)
+	if err != nil {
+		log.Error("Error opening CatFileBatch %v", err)
+		return false
+	}
+	defer cancel()
+	_, err = batch.QueryInfo(name)
+	return err == nil
+}
+
+// IsBranchExist returns true if given branch exists in current repository.
+func (repo *Repository) IsBranchExist(name string) bool {
+	if repo == nil || name == "" {
+		return false
+	}
+
+	return repo.IsReferenceExist(BranchPrefix + name)
+}
+
+// GetBranchNames returns branches from the repository, skipping "skip" initial branches and
+// returning at most "limit" branches, or all branches if "limit" is 0.
+func (repo *Repository) GetBranchNames(skip, limit int) ([]string, int, error) {
+	return callShowRef(repo.Ctx, repo.Path, BranchPrefix, gitcmd.TrustedCmdArgs{BranchPrefix, "--sort=-committerdate"}, skip, limit)
+}
+
+// WalkReferences walks all the references from the repository
+// refType should be empty, ObjectTag or ObjectBranch. All other values are equivalent to empty.
+func (repo *Repository) WalkReferences(refType ObjectType, skip, limit int, walkfn func(sha1, refname string) error) (int, error) {
+	var args gitcmd.TrustedCmdArgs
+	switch refType {
+	case ObjectTag:
+		args = gitcmd.TrustedCmdArgs{TagPrefix, "--sort=-taggerdate"}
+	case ObjectBranch:
+		args = gitcmd.TrustedCmdArgs{BranchPrefix, "--sort=-committerdate"}
+	}
+
+	return WalkShowRef(repo.Ctx, repo.Path, args, skip, limit, walkfn)
+}
+
+// callShowRef return refs, if limit = 0 it will not limit
+func callShowRef(ctx context.Context, repoPath, trimPrefix string, extraArgs gitcmd.TrustedCmdArgs, skip, limit int) (branchNames []string, countAll int, err error) {
+	countAll, err = WalkShowRef(ctx, repoPath, extraArgs, skip, limit, func(_, branchName string) error {
+		branchName = strings.TrimPrefix(branchName, trimPrefix)
+		branchNames = append(branchNames, branchName)
+
+		return nil
+	})
+	return branchNames, countAll, err
+}
+
+func WalkShowRef(ctx context.Context, repoPath string, extraArgs gitcmd.TrustedCmdArgs, skip, limit int, walkfn func(sha1, refname string) error) (countAll int, err error) {
+	i := 0
+	args := gitcmd.TrustedCmdArgs{"for-each-ref", "--format=%(objectname) %(refname)"}
+	args = append(args, extraArgs...)
+	cmd := gitcmd.NewCommand(args...)
+	stdoutReader, stdoutReaderClose := cmd.MakeStdoutPipe()
+	defer stdoutReaderClose()
+	cmd.WithDir(repoPath).
+		WithPipelineFunc(func(gitcmd.Context) error {
+			bufReader := bufio.NewReader(stdoutReader)
+			for i < skip {
+				_, isPrefix, err := bufReader.ReadLine()
+				if err == io.EOF {
+					return nil
+				}
+				if err != nil {
+					return err
+				}
+				if !isPrefix {
+					i++
+				}
+			}
+			for limit == 0 || i < skip+limit {
+				// The output of show-ref is simply a list:
+				// <sha> SP <ref> LF
+				sha, err := bufReader.ReadString(' ')
+				if err == io.EOF {
+					return nil
+				}
+				if err != nil {
+					return err
+				}
+
+				branchName, err := bufReader.ReadString('\n')
+				if err == io.EOF {
+					// This shouldn't happen... but we'll tolerate it for the sake of peace
+					return nil
+				}
+				if err != nil {
+					return err
+				}
+
+				if len(branchName) > 0 {
+					branchName = branchName[:len(branchName)-1]
+				}
+
+				if len(sha) > 0 {
+					sha = sha[:len(sha)-1]
+				}
+
+				err = walkfn(sha, branchName)
+				if err != nil {
+					return err
+				}
+				i++
+			}
+			// count all refs
+			for limit != 0 {
+				_, isPrefix, err := bufReader.ReadLine()
+				if err == io.EOF {
+					return nil
+				}
+				if err != nil {
+					return err
+				}
+				if !isPrefix {
+					i++
+				}
+			}
+			return nil
+		})
+	err = cmd.RunWithStderr(ctx)
+	if errPipeline, ok := gitcmd.UnwrapPipelineError(err); ok {
+		return i, errPipeline // keep the old behavior: return pipeline error directly
+	}
+	return i, err
+}
+
+// GetRefsBySha returns all references filtered with prefix that belong to a sha commit hash
+func (repo *Repository) GetRefsBySha(sha, prefix string) ([]string, error) {
+	var revList []string
+	_, err := WalkShowRef(repo.Ctx, repo.Path, nil, 0, 0, func(walkSha, refname string) error {
+		if walkSha == sha && strings.HasPrefix(refname, prefix) {
+			revList = append(revList, refname)
+		}
+		return nil
+	})
+	return revList, err
+}