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