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package export
import (
"context"
"fmt"
"log"
"net/url"
"os"
"os/exec"
"path"
"strings"
"git.sr.ht/~emersion/gqlclient"
"git.sr.ht/~xenrox/hut/srht/gitsrht"
)
const gitRepositoryDir = "repository.git"
type GitExporter struct {
client *gqlclient.Client
baseURL string
baseCloneURL string
}
func NewGitExporter(client *gqlclient.Client, baseURL string) *GitExporter {
return &GitExporter{
client: client,
baseURL: baseURL,
}
}
// A subset of gitsrht.Repository which only contains the fields we want to
// export (i.e. the ones filled in by the GraphQL query)
type GitRepoInfo struct {
Info
Description *string `json:"description"`
Visibility gitsrht.Visibility `json:"visibility"`
Readme *string `json:"readme"`
Head *string `json:"head"`
}
func (ex *GitExporter) Export(ctx context.Context, dir string) error {
var cursor *gitsrht.Cursor
for {
repos, err := gitsrht.ExportRepositories(ex.client, ctx, cursor)
if err != nil {
return err
}
for _, repo := range repos.Results {
base := path.Join(dir, repo.Name)
if err := ex.exportRepository(ctx, &repo, base); err != nil {
return err
}
}
cursor = repos.Cursor
if cursor == nil {
break
}
}
return nil
}
func (ex *GitExporter) ExportResource(ctx context.Context, dir, owner, resource string) error {
user, err := gitsrht.ExportRepository(ex.client, ctx, owner, resource)
if err != nil {
return err
}
return ex.exportRepository(ctx, user.Repository, dir)
}
func (ex *GitExporter) exportRepository(ctx context.Context, repo *gitsrht.Repository, base string) error {
// Cache base clone URL in exporter.
if ex.baseCloneURL == "" {
settings, err := gitsrht.SshSettings(ex.client, ctx)
if err != nil {
return err
}
sshUser := settings.Settings.SshUser
baseURL, err := url.Parse(ex.baseURL)
if err != nil {
panic(err)
}
ex.baseCloneURL = fmt.Sprintf("%s@%s", sshUser, baseURL.Host)
}
// TODO: Should we fetch & store ACLs?
infoPath := path.Join(base, infoFilename)
clonePath := path.Join(base, gitRepositoryDir)
cloneURL := fmt.Sprintf("%s:%s/%s", ex.baseCloneURL, repo.Owner.CanonicalName, repo.Name)
if _, err := os.Stat(clonePath); err == nil {
log.Printf("\tSkipping %s (already exists)", repo.Name)
return nil
}
if err := os.MkdirAll(base, 0o755); err != nil {
return err
}
log.Printf("\tCloning %s", repo.Name)
cmd := exec.CommandContext(ctx, "git", "clone", "--mirror", cloneURL, clonePath)
if err := cmd.Run(); err != nil {
return err
}
var head *string
if repo.HEAD != nil {
h := strings.TrimPrefix(repo.HEAD.Name, "refs/heads/")
head = &h
}
repoInfo := GitRepoInfo{
Info: Info{
Service: "git.sr.ht",
Name: repo.Name,
},
Description: repo.Description,
Visibility: repo.Visibility,
Readme: repo.Readme,
Head: head,
}
return writeJSON(infoPath, &repoInfo)
}
func (ex *GitExporter) ImportResource(ctx context.Context, dir string) error {
settings, err := gitsrht.SshSettings(ex.client, ctx)
if err != nil {
return fmt.Errorf("failed to get Git SSH settings: %v", err)
}
sshUser := settings.Settings.SshUser
baseURL, err := url.Parse(ex.baseURL)
if err != nil {
panic(err)
}
var info GitRepoInfo
if err := readJSON(path.Join(dir, infoFilename), &info); err != nil {
return err
}
g, err := gitsrht.CreateRepository(ex.client, ctx, info.Name, info.Visibility, info.Description, nil)
if err != nil {
return fmt.Errorf("failed to create Git repository: %v", err)
}
clonePath := path.Join(dir, gitRepositoryDir)
cloneURL := fmt.Sprintf("%s@%s:%s/%s", sshUser, baseURL.Host, g.Owner.CanonicalName, info.Name)
cmd := exec.Command("git", "-C", clonePath, "push", "--mirror", cloneURL)
if err := cmd.Run(); err != nil {
return fmt.Errorf("failed to push Git repository: %v", err)
}
if _, err := gitsrht.UpdateRepository(ex.client, ctx, g.Id, gitsrht.RepoInput{
Readme: info.Readme,
HEAD: info.Head,
}); err != nil {
return fmt.Errorf("failed to update Git repository: %v", err)
}
return nil
}
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