Use native git variants by default with go-git variants as build tag (#13673)

* Move last commit cache back into modules/git Signed-off-by: Andrew Thornton <art27@cantab.net> * Remove go-git from the interface for last commit cache Signed-off-by: Andrew Thornton <art27@cantab.net> * move cacheref to last_commit_cache Signed-off-by: Andrew Thornton <art27@cantab.net> * Remove go-git from routers/private/hook Signed-off-by: Andrew Thornton <art27@cantab.net> * Move FindLFSFiles to pipeline Signed-off-by: Andrew Thornton <art27@cantab.net> * Make no-go-git variants Signed-off-by: Andrew Thornton <art27@cantab.net> * Submodule RefID Signed-off-by: Andrew Thornton <art27@cantab.net> * fix issue with GetCommitsInfo Signed-off-by: Andrew Thornton <art27@cantab.net> * fix GetLastCommitForPaths Signed-off-by: Andrew Thornton <art27@cantab.net> * Improve efficiency Signed-off-by: Andrew Thornton <art27@cantab.net> * More efficiency Signed-off-by: Andrew Thornton <art27@cantab.net> * even faster Signed-off-by: Andrew Thornton <art27@cantab.net> * Reduce duplication * As per @lunny Signed-off-by: Andrew Thornton <art27@cantab.net> * attempt to fix drone Signed-off-by: Andrew Thornton <art27@cantab.net> * fix test-tags Signed-off-by: Andrew Thornton <art27@cantab.net> * default to use no-go-git variants and add gogit build tag Signed-off-by: Andrew Thornton <art27@cantab.net> * placate lint Signed-off-by: Andrew Thornton <art27@cantab.net> * as per @6543 Signed-off-by: Andrew Thornton <art27@cantab.net> Co-authored-by: 6543 <6543@obermui.de> Co-authored-by: techknowlogick <techknowlogick@gitea.io>
2020-12-17 14:00:47 +00:00 · 2020-12-17 14:00:47 +00:00 · 511f6138d4
commit 511f6138d4
parent 0851a89581
81 changed files with 3952 additions and 1492 deletions
--- a/modules/git/pipeline/lfs.go
+++ b/modules/git/pipeline/lfs.go
@ -0,0 +1,159 @@
+// Copyright 2020 The Gitea Authors. All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+
+// +build gogit
+
+package pipeline
+
+import (
+	"bufio"
+	"fmt"
+	"io"
+	"sort"
+	"strings"
+	"sync"
+	"time"
+
+	"code.gitea.io/gitea/modules/git"
+	gogit "github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/plumbing/object"
+)
+
+// LFSResult represents commits found using a provided pointer file hash
+type LFSResult struct {
+	Name           string
+	SHA            string
+	Summary        string
+	When           time.Time
+	ParentHashes   []git.SHA1
+	BranchName     string
+	FullCommitName string
+}
+
+type lfsResultSlice []*LFSResult
+
+func (a lfsResultSlice) Len() int           { return len(a) }
+func (a lfsResultSlice) Swap(i, j int)      { a[i], a[j] = a[j], a[i] }
+func (a lfsResultSlice) Less(i, j int) bool { return a[j].When.After(a[i].When) }
+
+// FindLFSFile finds commits that contain a provided pointer file hash
+func FindLFSFile(repo *git.Repository, hash git.SHA1) ([]*LFSResult, error) {
+	resultsMap := map[string]*LFSResult{}
+	results := make([]*LFSResult, 0)
+
+	basePath := repo.Path
+	gogitRepo := repo.GoGitRepo()
+
+	commitsIter, err := gogitRepo.Log(&gogit.LogOptions{
+		Order: gogit.LogOrderCommitterTime,
+		All:   true,
+	})
+	if err != nil {
+		return nil, fmt.Errorf("Failed to get GoGit CommitsIter. Error: %w", err)
+	}
+
+	err = commitsIter.ForEach(func(gitCommit *object.Commit) error {
+		tree, err := gitCommit.Tree()
+		if err != nil {
+			return err
+		}
+		treeWalker := object.NewTreeWalker(tree, true, nil)
+		defer treeWalker.Close()
+		for {
+			name, entry, err := treeWalker.Next()
+			if err == io.EOF {
+				break
+			}
+			if entry.Hash == hash {
+				result := LFSResult{
+					Name:         name,
+					SHA:          gitCommit.Hash.String(),
+					Summary:      strings.Split(strings.TrimSpace(gitCommit.Message), "\n")[0],
+					When:         gitCommit.Author.When,
+					ParentHashes: gitCommit.ParentHashes,
+				}
+				resultsMap[gitCommit.Hash.String()+":"+name] = &result
+			}
+		}
+		return nil
+	})
+	if err != nil && err != io.EOF {
+		return nil, fmt.Errorf("Failure in CommitIter.ForEach: %w", err)
+	}
+
+	for _, result := range resultsMap {
+		hasParent := false
+		for _, parentHash := range result.ParentHashes {
+			if _, hasParent = resultsMap[parentHash.String()+":"+result.Name]; hasParent {
+				break
+			}
+		}
+		if !hasParent {
+			results = append(results, result)
+		}
+	}
+
+	sort.Sort(lfsResultSlice(results))
+
+	// Should really use a go-git function here but name-rev is not completed and recapitulating it is not simple
+	shasToNameReader, shasToNameWriter := io.Pipe()
+	nameRevStdinReader, nameRevStdinWriter := io.Pipe()
+	errChan := make(chan error, 1)
+	wg := sync.WaitGroup{}
+	wg.Add(3)
+
+	go func() {
+		defer wg.Done()
+		scanner := bufio.NewScanner(nameRevStdinReader)
+		i := 0
+		for scanner.Scan() {
+			line := scanner.Text()
+			if len(line) == 0 {
+				continue
+			}
+			result := results[i]
+			result.FullCommitName = line
+			result.BranchName = strings.Split(line, "~")[0]
+			i++
+		}
+	}()
+	go NameRevStdin(shasToNameReader, nameRevStdinWriter, &wg, basePath)
+	go func() {
+		defer wg.Done()
+		defer shasToNameWriter.Close()
+		for _, result := range results {
+			i := 0
+			if i < len(result.SHA) {
+				n, err := shasToNameWriter.Write([]byte(result.SHA)[i:])
+				if err != nil {
+					errChan <- err
+					break
+				}
+				i += n
+			}
+			n := 0
+			for n < 1 {
+				n, err = shasToNameWriter.Write([]byte{'\n'})
+				if err != nil {
+					errChan <- err
+					break
+				}
+
+			}
+
+		}
+	}()
+
+	wg.Wait()
+
+	select {
+	case err, has := <-errChan:
+		if has {
+			return nil, fmt.Errorf("Unable to obtain name for LFS files. Error: %w", err)
+		}
+	default:
+	}
+
+	return results, nil
+}