srpmproc/internal/git.go

317 lines
8.4 KiB
Go

// Copyright (c) 2021 The Srpmproc Authors
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package internal
import (
"fmt"
"git.rockylinux.org/release-engineering/public/srpmproc/internal/data"
"github.com/go-git/go-billy/v5/memfs"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/config"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/object"
"github.com/go-git/go-git/v5/storage/memory"
"io/ioutil"
"log"
"net/http"
"path/filepath"
"sort"
"strings"
"time"
)
type remoteTarget struct {
remote string
when time.Time
}
type remoteTargetSlice []remoteTarget
func (p remoteTargetSlice) Len() int {
return len(p)
}
func (p remoteTargetSlice) Less(i, j int) bool {
return p[i].when.Before(p[j].when)
}
func (p remoteTargetSlice) Swap(i, j int) {
p[i], p[j] = p[j], p[i]
}
type GitMode struct{}
func (g *GitMode) RetrieveSource(pd *data.ProcessData) *data.ModeData {
repo, err := git.Init(memory.NewStorage(), memfs.New())
if err != nil {
log.Fatalf("could not init git Repo: %v", err)
}
w, err := repo.Worktree()
if err != nil {
log.Fatalf("could not get Worktree: %v", err)
}
refspec := config.RefSpec("+refs/heads/*:refs/remotes/*")
remote, err := repo.CreateRemote(&config.RemoteConfig{
Name: "upstream",
URLs: []string{pd.RpmLocation},
Fetch: []config.RefSpec{refspec},
})
if err != nil {
log.Fatalf("could not create remote: %v", err)
}
err = remote.Fetch(&git.FetchOptions{
RefSpecs: []config.RefSpec{refspec},
Tags: git.AllTags,
Force: true,
})
if err != nil {
log.Fatalf("could not fetch upstream: %v", err)
}
var branches remoteTargetSlice
latestTags := map[string]*remoteTarget{}
tagAdd := func(tag *object.Tag) error {
if strings.HasPrefix(tag.Name, fmt.Sprintf("imports/%s%d", pd.ImportBranchPrefix, pd.Version)) {
refSpec := fmt.Sprintf("refs/tags/%s", tag.Name)
if tagImportRegex.MatchString(refSpec) {
match := tagImportRegex.FindStringSubmatch(refSpec)
exists := latestTags[match[2]]
if exists != nil && exists.when.After(tag.Tagger.When) {
return nil
}
latestTags[match[2]] = &remoteTarget{
remote: refSpec,
when: tag.Tagger.When,
}
}
}
return nil
}
tagIter, err := repo.TagObjects()
if err != nil {
log.Fatalf("could not get tag objects: %v", err)
}
_ = tagIter.ForEach(tagAdd)
list, err := remote.List(&git.ListOptions{})
if err != nil {
log.Fatalf("could not list upstream: %v", err)
}
for _, ref := range list {
if ref.Hash().IsZero() {
continue
}
commit, err := repo.CommitObject(ref.Hash())
if err != nil {
log.Printf("could not get commit object for ref %s: %v", ref.Name().String(), err)
continue
}
_ = tagAdd(&object.Tag{
Name: strings.TrimPrefix(string(ref.Name()), "refs/tags/"),
Tagger: commit.Committer,
})
}
for _, branch := range latestTags {
log.Printf("tag: %s", strings.TrimPrefix(branch.remote, "refs/tags/"))
branches = append(branches, *branch)
}
sort.Sort(branches)
var sortedBranches []string
for _, branch := range branches {
sortedBranches = append(sortedBranches, branch.remote)
}
return &data.ModeData{
Repo: repo,
Worktree: w,
RpmFile: createPackageFile(filepath.Base(pd.RpmLocation)),
FileWrites: nil,
Branches: sortedBranches,
}
}
func (g *GitMode) WriteSource(pd *data.ProcessData, md *data.ModeData) {
remote, err := md.Repo.Remote("upstream")
if err != nil {
log.Fatalf("could not get upstream remote: %v", err)
}
var refspec config.RefSpec
var branchName string
if strings.HasPrefix(md.TagBranch, "refs/heads") {
refspec = config.RefSpec(fmt.Sprintf("+%s:%s", md.TagBranch, md.TagBranch))
branchName = strings.TrimPrefix(md.TagBranch, "refs/heads/")
} else {
match := tagImportRegex.FindStringSubmatch(md.TagBranch)
branchName = match[2]
refspec = config.RefSpec(fmt.Sprintf("+refs/heads/%s:%s", branchName, md.TagBranch))
}
log.Printf("checking out upstream refspec %s", refspec)
err = remote.Fetch(&git.FetchOptions{
RemoteName: "upstream",
RefSpecs: []config.RefSpec{refspec},
Tags: git.AllTags,
Force: true,
})
if err != nil && err != git.NoErrAlreadyUpToDate {
log.Fatalf("could not fetch upstream: %v", err)
}
err = md.Worktree.Checkout(&git.CheckoutOptions{
Branch: plumbing.ReferenceName(md.TagBranch),
Force: true,
})
if err != nil {
log.Fatalf("could not checkout source from git: %v", err)
}
_, err = md.Worktree.Add(".")
if err != nil {
log.Fatalf("could not add Worktree: %v", err)
}
metadataFile, err := md.Worktree.Filesystem.Open(fmt.Sprintf(".%s.metadata", md.RpmFile.Name()))
if err != nil {
log.Printf("warn: could not open metadata file, so skipping: %v", err)
return
}
fileBytes, err := ioutil.ReadAll(metadataFile)
if err != nil {
log.Fatalf("could not read metadata file: %v", err)
}
client := &http.Client{
Transport: &http.Transport{
DisableCompression: false,
},
}
fileContent := strings.Split(string(fileBytes), "\n")
for _, line := range fileContent {
if strings.TrimSpace(line) == "" {
continue
}
lineInfo := strings.SplitN(line, " ", 2)
hash := strings.TrimSpace(lineInfo[0])
path := strings.TrimSpace(lineInfo[1])
var body []byte
if md.BlobCache[hash] != nil {
body = md.BlobCache[hash]
log.Printf("retrieving %s from cache", hash)
} else {
fromBlobStorage := pd.BlobStorage.Read(hash)
if fromBlobStorage != nil && !pd.NoStorageDownload {
body = fromBlobStorage
log.Printf("downloading %s from blob storage", hash)
} else {
url := fmt.Sprintf("https://git.centos.org/sources/%s/%s/%s", md.RpmFile.Name(), branchName, hash)
log.Printf("downloading %s", url)
req, err := http.NewRequest("GET", url, nil)
if err != nil {
log.Fatalf("could not create new http request: %v", err)
}
req.Header.Set("Accept-Encoding", "*")
resp, err := client.Do(req)
if err != nil {
log.Fatalf("could not download dist-git file: %v", err)
}
body, err = ioutil.ReadAll(resp.Body)
if err != nil {
log.Fatalf("could not read the whole dist-git file: %v", err)
}
err = resp.Body.Close()
if err != nil {
log.Fatalf("could not close body handle: %v", err)
}
}
md.BlobCache[hash] = body
}
f, err := md.Worktree.Filesystem.Create(path)
if err != nil {
log.Fatalf("could not open file pointer: %v", err)
}
hasher := data.CompareHash(body, hash)
if hasher == nil {
log.Fatal("checksum in metadata does not match dist-git file")
}
md.SourcesToIgnore = append(md.SourcesToIgnore, &data.IgnoredSource{
Name: path,
HashFunction: hasher,
})
_, err = f.Write(body)
if err != nil {
log.Fatalf("could not copy dist-git file to in-tree: %v", err)
}
_ = f.Close()
}
}
func (g *GitMode) PostProcess(md *data.ModeData) {
for _, source := range md.SourcesToIgnore {
_, err := md.Worktree.Filesystem.Stat(source.Name)
if err == nil {
err := md.Worktree.Filesystem.Remove(source.Name)
if err != nil {
log.Fatalf("could not remove dist-git file: %v", err)
}
}
}
_, err := md.Worktree.Add(".")
if err != nil {
log.Fatalf("could not add git sources: %v", err)
}
}
func (g *GitMode) ImportName(_ *data.ProcessData, md *data.ModeData) string {
if tagImportRegex.MatchString(md.TagBranch) {
match := tagImportRegex.FindStringSubmatch(md.TagBranch)
return match[3]
}
return strings.TrimPrefix(md.TagBranch, "refs/heads/")
}