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package helper
import (
"bufio"
"context"
"fmt"
"io"
"path"
"strings"
"time"
"github.com/npfaro/dumbforge/internal/gitutil"
"github.com/npfaro/dumbforge/internal/publish"
"github.com/npfaro/dumbforge/internal/remoteurl"
"github.com/npfaro/dumbforge/internal/s3store"
"github.com/npfaro/dumbforge/internal/site"
)
func Run(ctx context.Context, rawURL string, stdin io.Reader, stdout, stderr io.Writer) error {
spec, err := remoteurl.Parse(rawURL)
if err != nil {
return err
}
store, err := s3store.New(ctx, spec)
if err != nil {
return err
}
publisher := &publish.Publisher{
Store: store,
Git: gitutil.Git{},
Progress: func(format string, args ...any) {
fmt.Fprintf(stderr, "dumbforge: "+format+"\n", args...)
},
}
publisher.AfterPublish = func(ctx context.Context, result publish.Result) {
publishSite(ctx, publisher, result, stderr)
}
defer func() {
if err := publisher.Abort(context.WithoutCancel(ctx)); err != nil {
fmt.Fprintf(stderr, "dumbforge: warning: release unused push lock: %v\n", err)
}
}()
scanner := bufio.NewScanner(stdin)
writer := bufio.NewWriter(stdout)
var advertised map[string]string
for scanner.Scan() {
line := scanner.Text()
switch {
case line == "capabilities":
fmt.Fprintln(writer, "push")
fmt.Fprintln(writer, "option")
fmt.Fprintln(writer)
if err := writer.Flush(); err != nil {
return err
}
case line == "list" || line == "list for-push":
var metadata publish.Metadata
var err error
if line == "list for-push" {
metadata, err = publisher.Prepare(ctx)
} else {
metadata, err = publisher.List(ctx)
}
if err != nil {
return err
}
advertised = make(map[string]string, len(metadata.Refs))
for name, ref := range metadata.Refs {
advertised[name] = ref.OID
}
writeRefList(writer, metadata, line == "list")
if err := writer.Flush(); err != nil {
return err
}
case strings.HasPrefix(line, "option "):
name := strings.Fields(line)
if len(name) >= 2 && (name[1] == "verbosity" || name[1] == "progress") {
fmt.Fprintln(writer, "ok")
} else {
fmt.Fprintln(writer, "unsupported")
}
if err := writer.Flush(); err != nil {
return err
}
case strings.HasPrefix(line, "push "):
lines := []string{strings.TrimPrefix(line, "push ")}
for scanner.Scan() {
next := scanner.Text()
if next == "" {
break
}
if !strings.HasPrefix(next, "push ") {
return fmt.Errorf("unexpected command in push batch %q", next)
}
lines = append(lines, strings.TrimPrefix(next, "push "))
}
updates, err := parsePushes(lines)
if err == nil {
_, err = publisher.Push(ctx, updates, advertised)
}
if err != nil {
message := strings.NewReplacer("\n", " ", "\r", " ").Replace(err.Error())
for _, update := range updates {
fmt.Fprintf(writer, "error %s %s\n", update.Dst, message)
}
if len(updates) == 0 {
return err
}
} else {
for _, update := range updates {
fmt.Fprintf(writer, "ok %s\n", update.Dst)
}
}
fmt.Fprintln(writer)
if err := writer.Flush(); err != nil {
return err
}
case line == "":
// Empty lines terminate command batches and need no response here.
default:
return fmt.Errorf("unsupported remote-helper command %q", line)
}
}
return scanner.Err()
}
func publishSite(ctx context.Context, publisher *publish.Publisher, result publish.Result, stderr io.Writer) {
spec := publisher.Store.Spec()
if spec.PublicRepoURL() == "" {
return
}
owner := spec.Bucket
prefixDir := path.Dir(spec.Prefix)
if prefixDir != "." && prefixDir != "/" {
owner = path.Base(prefixDir)
}
generator, err := site.New(publisher.Git, spec.PublicRepoURL(), path.Base(spec.Prefix), owner)
if err != nil {
fmt.Fprintf(stderr, "dumbforge: warning: generate site: %v\n", err)
return
}
generator.Progress = func(format string, args ...any) {
fmt.Fprintf(stderr, "dumbforge: "+format+"\n", args...)
}
generator.SetBranches(result.Branches, strings.TrimPrefix(result.Head, "refs/heads/"))
generator.SetAssetsCurrent(result.SiteVersion == generator.AssetVersion())
var deletedBranches []string
navigationChanged := false
for _, update := range result.Updates {
if !strings.HasPrefix(update.Dst, "refs/heads/") {
continue
}
branch := strings.TrimPrefix(update.Dst, "refs/heads/")
if update.NewOID == "" {
deletedBranches = append(deletedBranches, branch)
navigationChanged = true
continue
}
if update.OldOID == "" {
navigationChanged = true
}
generatedAt := time.Now()
build, err := generator.BuildBranch(ctx, branch, update.OldOID, update.NewOID, update.Dst == result.Head)
generationTime := time.Since(generatedAt)
if err == nil {
publishedAt := time.Now()
err = generator.Publish(ctx, publisher.Store, build)
if err == nil {
generator.SetAssetsCurrent(true)
fmt.Fprintf(stderr, "dumbforge: site generated in %s, uploaded in %s\n", generationTime.Round(time.Millisecond), time.Since(publishedAt).Round(time.Millisecond))
}
}
if err != nil {
fmt.Fprintf(stderr, "dumbforge: warning: site publication failed: %v\n", err)
}
}
if navigationChanged {
navigation, err := generator.RepositoryNavigationBuild(deletedBranches)
if err == nil {
err = generator.Publish(ctx, publisher.Store, navigation)
}
if err != nil {
fmt.Fprintf(stderr, "dumbforge: warning: repository navigation publication failed: %v\n", err)
}
}
}
func parsePushes(specs []string) ([]publish.Update, error) {
updates := make([]publish.Update, 0, len(specs))
for _, spec := range specs {
force := strings.HasPrefix(spec, "+")
spec = strings.TrimPrefix(spec, "+")
parts := strings.SplitN(spec, ":", 2)
if len(parts) != 2 || parts[1] == "" {
return nil, fmt.Errorf("invalid push refspec %q", spec)
}
updates = append(updates, publish.Update{Src: parts[0], Dst: parts[1], Force: force})
}
return updates, nil
}
func sortedRefNames(refs map[string]publish.Ref) []string {
result := make([]string, 0, len(refs))
for name := range refs {
result = append(result, name)
}
for i := 1; i < len(result); i++ {
for j := i; j > 0 && result[j] < result[j-1]; j-- {
result[j], result[j-1] = result[j-1], result[j]
}
}
return result
}
func writeRefList(writer io.Writer, metadata publish.Metadata, includeHead bool) {
if includeHead && metadata.Head != "" {
fmt.Fprintf(writer, "@%s HEAD\n", metadata.Head)
}
for _, name := range sortedRefNames(metadata.Refs) {
fmt.Fprintf(writer, "%s %s\n", metadata.Refs[name].OID, name)
}
fmt.Fprintln(writer)
}
|
