2020-12-17 07:00:47 -07:00
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// Copyright 2017 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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2021-08-24 09:47:09 -07:00
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//go:build !gogit
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2020-12-17 07:00:47 -07:00
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// +build !gogit
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package git
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import (
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"context"
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"fmt"
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"io"
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"path"
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"sort"
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"code.gitea.io/gitea/modules/log"
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)
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// GetCommitsInfo gets information of all commits that are corresponding to these entries
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func (tes Entries) GetCommitsInfo(ctx context.Context, commit *Commit, treePath string, cache *LastCommitCache) ([]CommitInfo, *Commit, error) {
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entryPaths := make([]string, len(tes)+1)
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// Get the commit for the treePath itself
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entryPaths[0] = ""
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for i, entry := range tes {
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entryPaths[i+1] = entry.Name()
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}
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var err error
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var revs map[string]*Commit
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if cache != nil {
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var unHitPaths []string
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revs, unHitPaths, err = getLastCommitForPathsByCache(ctx, commit.ID.String(), treePath, entryPaths, cache)
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if err != nil {
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return nil, nil, err
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}
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if len(unHitPaths) > 0 {
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sort.Strings(unHitPaths)
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commits, err := GetLastCommitForPaths(ctx, commit, treePath, unHitPaths)
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if err != nil {
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return nil, nil, err
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}
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for pth, found := range commits {
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if err := cache.Put(commit.ID.String(), path.Join(treePath, pth), found.ID.String()); err != nil {
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return nil, nil, err
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}
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revs[pth] = found
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}
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}
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} else {
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sort.Strings(entryPaths)
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revs, err = GetLastCommitForPaths(ctx, commit, treePath, entryPaths)
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}
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if err != nil {
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return nil, nil, err
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}
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commitsInfo := make([]CommitInfo, len(tes))
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for i, entry := range tes {
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commitsInfo[i] = CommitInfo{
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Entry: entry,
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}
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if entryCommit, ok := revs[entry.Name()]; ok {
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commitsInfo[i].Commit = entryCommit
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if entry.IsSubModule() {
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subModuleURL := ""
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var fullPath string
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if len(treePath) > 0 {
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fullPath = treePath + "/" + entry.Name()
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} else {
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fullPath = entry.Name()
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}
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if subModule, err := commit.GetSubModule(fullPath); err != nil {
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return nil, nil, err
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} else if subModule != nil {
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subModuleURL = subModule.URL
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}
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subModuleFile := NewSubModuleFile(entryCommit, subModuleURL, entry.ID.String())
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commitsInfo[i].SubModuleFile = subModuleFile
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}
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} else {
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log.Debug("missing commit for %s", entry.Name())
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}
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}
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// Retrieve the commit for the treePath itself (see above). We basically
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// get it for free during the tree traversal and it's used for listing
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// pages to display information about newest commit for a given path.
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var treeCommit *Commit
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var ok bool
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if treePath == "" {
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treeCommit = commit
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} else if treeCommit, ok = revs[""]; ok {
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treeCommit.repo = commit.repo
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}
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return commitsInfo, treeCommit, nil
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}
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func getLastCommitForPathsByCache(ctx context.Context, commitID, treePath string, paths []string, cache *LastCommitCache) (map[string]*Commit, []string, error) {
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wr, rd, cancel := cache.repo.CatFileBatch()
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defer cancel()
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var unHitEntryPaths []string
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var results = make(map[string]*Commit)
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for _, p := range paths {
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lastCommit, err := cache.Get(commitID, path.Join(treePath, p), wr, rd)
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if err != nil {
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return nil, nil, err
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}
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if lastCommit != nil {
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results[p] = lastCommit.(*Commit)
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continue
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}
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unHitEntryPaths = append(unHitEntryPaths, p)
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}
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return results, unHitEntryPaths, nil
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}
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// GetLastCommitForPaths returns last commit information
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func GetLastCommitForPaths(ctx context.Context, commit *Commit, treePath string, paths []string) (map[string]*Commit, error) {
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// We read backwards from the commit to obtain all of the commits
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revs, err := WalkGitLog(ctx, commit.repo, commit, treePath, paths...)
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if err != nil {
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return nil, err
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}
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batchStdinWriter, batchReader, cancel := commit.repo.CatFileBatch()
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defer cancel()
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commitsMap := map[string]*Commit{}
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commitsMap[commit.ID.String()] = commit
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commitCommits := map[string]*Commit{}
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for path, commitID := range revs {
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c, ok := commitsMap[commitID]
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if ok {
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commitCommits[path] = c
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continue
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}
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if len(commitID) == 0 {
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continue
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}
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_, err := batchStdinWriter.Write([]byte(commitID + "\n"))
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if err != nil {
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return nil, err
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}
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_, typ, size, err := ReadBatchLine(batchReader)
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if err != nil {
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return nil, err
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}
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if typ != "commit" {
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return nil, fmt.Errorf("unexpected type: %s for commit id: %s", typ, commitID)
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}
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c, err = CommitFromReader(commit.repo, MustIDFromString(string(commitID)), io.LimitReader(batchReader, int64(size)))
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if err != nil {
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return nil, err
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}
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if _, err := batchReader.Discard(1); err != nil {
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return nil, err
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}
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commitCommits[path] = c
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}
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return commitCommits, nil
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}
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