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Monorepo for Tangled
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Go
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import ( "context" "database/sql" "encoding/json" "errors" "fmt" "net/http" "strings" "time"
"tangled.org/core/api/tangled" "tangled.org/core/appview/db" "tangled.org/core/appview/knotcompat" "tangled.org/core/appview/models" "tangled.org/core/appview/oauth" "tangled.org/core/appview/reporesolver" "tangled.org/core/appview/xrpcclient" "tangled.org/core/patchutil" "tangled.org/core/tid" "tangled.org/core/types" "tangled.org/core/xrpc"
comatproto "github.com/bluesky-social/indigo/api/atproto" "github.com/bluesky-social/indigo/atproto/syntax" lexutil "github.com/bluesky-social/indigo/lex/util")
func (s *Pulls) handleBranchBasedPull( w http.ResponseWriter, r *http.Request, repo *models.Repo, userDid syntax.DID, title, body, targetBranch, sourceBranch string, isStacked bool, stackTitles, stackBodies map[string]string,) { l := s.logger.With("handler", "handleBranchBasedPull", "user", userDid, "target_branch", targetBranch, "source_branch", sourceBranch, "is_stacked", isStacked)
xrpcc := s.knotClient(repo.Knot)
xrpcBytes, err := tangled.RepoCompare(r.Context(), xrpcc, repo.RepoIdentifier(), targetBranch, sourceBranch) if err != nil { if xrpcerr := xrpcclient.HandleXrpcErr(err); xrpcerr != nil { l.Error("failed to call XRPC repo.compare", "xrpcerr", xrpcerr, "err", err) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return } l.Error("failed to compare", "err", err) s.pages.Notice(w, "pull", err.Error()) return }
var comparison types.RepoFormatPatchResponse if err := json.Unmarshal(xrpcBytes, &comparison); err != nil { l.Error("failed to decode XRPC compare response", "err", err) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return }
if len(comparison.FormatPatch) == 0 { s.pages.Notice(w, "pull", "No commits between target and source.") return }
sourceRev := comparison.Rev2 patch := comparison.FormatPatchRaw combined := comparison.CombinedPatchRaw
if err := validatePatch(&patch); err != nil { s.logger.Error("failed to validate patch", "err", err) s.pages.Notice(w, "pull", "Invalid patch format. Please provide a valid diff.") return }
pullSource := &models.PullSource{ Branch: sourceBranch, }
s.createPullRequest(w, r, repo, userDid, title, body, targetBranch, patch, combined, sourceRev, pullSource, isStacked, stackTitles, stackBodies)}
func (s *Pulls) handlePatchBasedPull(w http.ResponseWriter, r *http.Request, repo *models.Repo, userDid syntax.DID, title, body, targetBranch, patch string, isStacked bool, stackTitles, stackBodies map[string]string) { if err := validatePatch(&patch); err != nil { s.logger.Error("patch validation failed", "err", err) s.pages.Notice(w, "pull", "Invalid patch format. Please provide a valid diff.") return }
s.createPullRequest(w, r, repo, userDid, title, body, targetBranch, patch, "", "", nil, isStacked, stackTitles, stackBodies)}
func (s *Pulls) handleForkBasedPull(w http.ResponseWriter, r *http.Request, repo *models.Repo, userDid syntax.DID, forkRepoDid string, title, body, targetBranch, sourceBranch string, isStacked bool, stackTitles, stackBodies map[string]string) { l := s.logger.With("handler", "handleForkBasedPull", "user", userDid, "fork_repo_did", forkRepoDid, "target_branch", targetBranch, "source_branch", sourceBranch, "is_stacked", isStacked)
if forkRepoDid == "" { s.pages.Notice(w, "pull", "No such fork.") return } fork, err := db.GetForkByRepoDid(s.db, forkRepoDid) if errors.Is(err, sql.ErrNoRows) { s.pages.Notice(w, "pull", "No such fork.") return } else if err != nil { l.Error("failed to fetch fork", "err", err, "fork_repo_did", forkRepoDid) s.pages.Notice(w, "pull", "Failed to fetch fork.") return }
client, err := s.oauth.ServiceClient( r, oauth.WithService(fork.Knot), oauth.WithLxm(tangled.RepoHiddenRefNSID), oauth.WithDev(s.config.Core.Dev), )
resp, err := tangled.RepoHiddenRef( r.Context(), client, &tangled.RepoHiddenRef_Input{ ForkRef: sourceBranch, RemoteRef: targetBranch, Repo: fork.RepoAt().String(), }, ) if xrpcerr := xrpcclient.HandleXrpcErr(err); xrpcerr != nil { s.logger.Error("failed to set hidden ref", "xrpcerr", xrpcerr, "err", err) s.pages.Notice(w, "pull", xrpcerr.Error()) return }
if !resp.Success { errorMsg := "Failed to create pull request" if resp.Error != nil { errorMsg = fmt.Sprintf("Failed to create pull request: %s", *resp.Error) } s.pages.Notice(w, "pull", errorMsg) return }
hiddenRef := fmt.Sprintf("hidden/%s/%s", sourceBranch, targetBranch) // We're now comparing the sourceBranch (on the fork) against the hiddenRef which is tracking // the targetBranch on the target repository. This code is a bit confusing, but here's an example: // hiddenRef: hidden/feature-1/main (on repo-fork) // targetBranch: main (on repo-1) // sourceBranch: feature-1 (on repo-fork) forkXrpcc := s.knotClient(fork.Knot)
forkXrpcBytes, err := tangled.RepoCompare(r.Context(), forkXrpcc, fork.RepoIdentifier(), hiddenRef, sourceBranch) if err != nil { if xrpcerr := xrpcclient.HandleXrpcErr(err); xrpcerr != nil { l.Error("failed to call XRPC repo.compare for fork", "xrpcerr", xrpcerr, "err", err, "hidden_ref", hiddenRef) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return } l.Error("failed to compare across branches", "err", err, "hidden_ref", hiddenRef) s.pages.Notice(w, "pull", err.Error()) return }
var comparison types.RepoFormatPatchResponse if err := json.Unmarshal(forkXrpcBytes, &comparison); err != nil { l.Error("failed to decode XRPC compare response for fork", "err", err) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return }
if len(comparison.FormatPatch) == 0 { s.pages.Notice(w, "pull", "No commits between target and source.") return }
sourceRev := comparison.Rev2 patch := comparison.FormatPatchRaw combined := comparison.CombinedPatchRaw
if err := validatePatch(&patch); err != nil { s.logger.Error("failed to validate patch", "err", err) s.pages.Notice(w, "pull", "Invalid patch format. Please provide a valid diff.") return }
forkDid := syntax.DID(fork.RepoDid) pullSource := &models.PullSource{ Branch: sourceBranch, RepoDid: &forkDid, }
s.createPullRequest(w, r, repo, userDid, title, body, targetBranch, patch, combined, sourceRev, pullSource, isStacked, stackTitles, stackBodies)}
func (s *Pulls) createPullRequest( w http.ResponseWriter, r *http.Request, repo *models.Repo, userDid syntax.DID, title, body, targetBranch string, patch string, combined string, sourceRev string, pullSource *models.PullSource, isStacked bool, stackTitles, stackBodies map[string]string,) { l := s.logger.With("handler", "createPullRequest", "user", userDid, "target_branch", targetBranch, "is_stacked", isStacked)
if isStacked { // creates a series of PRs, each linking to the previous, identified by jj's change-id s.createStackedPullRequest( w, r, repo, userDid, targetBranch, patch, sourceRev, pullSource, stackTitles, stackBodies, ) return }
client, err := s.oauth.AuthorizedClient(r) if err != nil { l.Error("failed to get authorized client", "err", err) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return }
tx, err := s.db.BeginTx(r.Context(), nil) if err != nil { l.Error("failed to start tx", "err", err) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return } defer tx.Rollback()
// We've already checked earlier if it's diff-based and title is empty, // so if it's still empty now, it's intentionally skipped owing to format-patch. if title == "" || body == "" { formatPatches, err := patchutil.ExtractPatches(patch) if err != nil { s.pages.Notice(w, "pull", fmt.Sprintf("Failed to extract patches: %v", err)) return } if len(formatPatches) == 0 { s.pages.Notice(w, "pull", "No patches found in the supplied format-patch.") return }
if title == "" { title = formatPatches[0].Title } if body == "" { body = formatPatches[0].Body } }
mentions, references := s.mentionsResolver.Resolve(r.Context(), body)
rkey := tid.TID()
blob, err := xrpc.RepoUploadBlob(r.Context(), client, gz(patch), ApplicationGzip) if err != nil { l.Error("failed to upload patch", "err", err) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return }
now := time.Now()
pull := &models.Pull{ Title: title, Body: body, TargetBranch: targetBranch, OwnerDid: userDid.String(), RepoDid: syntax.DID(repo.RepoDid), Rkey: rkey, Mentions: mentions, References: references, Submissions: []*models.PullSubmission{ { Patch: patch, Combined: combined, SourceRev: sourceRev, Blob: *blob.Blob, Created: now, }, }, PullSource: pullSource, State: models.PullOpen, Created: now, Repo: repo, }
record := pull.AsRecord() _, err = comatproto.RepoPutRecord(r.Context(), client, &comatproto.RepoPutRecord_Input{ Collection: tangled.RepoPullNSID, Repo: userDid.String(), Rkey: rkey, Record: knotcompat.Pull(&record), }) if err != nil { l.Error("failed to create pull request", "err", err) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return }
err = db.PutPull(tx, pull) if err != nil { l.Error("failed to create pull request in database", "err", err) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return } pullId, err := db.NextPullId(tx, repo.RepoDid) if err != nil { s.logger.Error("failed to get pull id", "err", err) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return }
if err = tx.Commit(); err != nil { l.Error("failed to commit transaction for pull request", "err", err) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return }
s.notifier.NewPull(r.Context(), pull)
s.applyCreationLabels(r.Context(), client, userDid, []*models.Pull{pull}, r.Form, repo)
ownerSlashRepo := reporesolver.GetBaseRepoPath(r, repo) s.pages.HxRedirect(w, fmt.Sprintf("/%s/pulls/%d", ownerSlashRepo, pullId))}
func (s *Pulls) createStackedPullRequest( w http.ResponseWriter, r *http.Request, repo *models.Repo, userDid syntax.DID, targetBranch string, patch string, sourceRev string, pullSource *models.PullSource, stackTitles, stackBodies map[string]string,) { l := s.logger.With("handler", "createStackedPullRequest", "user", userDid, "target_branch", targetBranch, "source_rev", sourceRev)
// run some necessary checks for stacked-prs first
formatPatches, err := patchutil.ExtractPatches(patch) if err != nil { l.Error("failed to extract patches", "err", err) s.pages.Notice(w, "pull", fmt.Sprintf("Failed to extract patches: %v", err)) return }
// must have atleast 1 patch to begin with if len(formatPatches) == 0 { l.Error("empty patches") s.pages.Notice(w, "pull", "No patches found in the generated format-patch.") return }
client, err := s.oauth.AuthorizedClient(r) if err != nil { l.Error("failed to get authorized client", "err", err) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return }
// first upload all blobs blobs := make([]*lexutil.LexBlob, len(formatPatches)) for i, p := range formatPatches { blob, err := xrpc.RepoUploadBlob(r.Context(), client, gz(p.Raw), ApplicationGzip) if err != nil { l.Error("failed to upload patch blob", "err", err, "patch_index", i) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return } l.Info("uploaded blob", "idx", i+1, "total", len(formatPatches)) blobs[i] = blob.Blob }
// build a stack out of this patch stack, err := s.newStack(r.Context(), repo, userDid, targetBranch, pullSource, formatPatches, blobs, stackTitles, stackBodies) if err != nil { l.Error("failed to create stack", "err", err) s.pages.Notice(w, "pull", fmt.Sprintf("Failed to create stack: %v", err)) return }
// apply all record creations at once var writes []*comatproto.RepoApplyWrites_Input_Writes_Elem for _, p := range stack { record := p.AsRecord() writes = append(writes, &comatproto.RepoApplyWrites_Input_Writes_Elem{ RepoApplyWrites_Create: &comatproto.RepoApplyWrites_Create{ Collection: tangled.RepoPullNSID, Rkey: &p.Rkey, Value: knotcompat.Pull(&record), }, }) } _, err = comatproto.RepoApplyWrites(r.Context(), client, &comatproto.RepoApplyWrites_Input{ Repo: userDid.String(), Writes: writes, }) if err != nil { l.Error("failed to create stacked pull request", "err", err) s.pages.Notice(w, "pull", "Failed to create stacked pull request. Try again later.") return }
// create all pulls at once tx, err := s.db.BeginTx(r.Context(), nil) if err != nil { l.Error("failed to start tx", "err", err) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return } defer tx.Rollback()
for _, p := range stack { err = db.PutPull(tx, p) if err != nil { l.Error("failed to create pull request in database", "err", err, "pull_rkey", p.Rkey) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return }
}
if err = tx.Commit(); err != nil { l.Error("failed to commit transaction for pull requests", "err", err) s.pages.Notice(w, "pull", "Failed to create pull request. Try again later.") return }
// notify about each pull // // this is performed after tx.Commit, because it could result in a locked DB otherwise for _, p := range stack { s.notifier.NewPull(r.Context(), p) }
s.applyCreationLabels(r.Context(), client, userDid, stack, r.Form, repo)
ownerSlashRepo := reporesolver.GetBaseRepoPath(r, repo) s.pages.HxRedirect(w, fmt.Sprintf("/%s/pulls", ownerSlashRepo))}
func (s *Pulls) newStack( ctx context.Context, repo *models.Repo, userDid syntax.DID, targetBranch string, pullSource *models.PullSource, formatPatches []types.FormatPatch, blobs []*lexutil.LexBlob, stackTitles, stackBodies map[string]string,) (models.Stack, error) { var stack models.Stack var parentAtUri *syntax.ATURI for i, fp := range formatPatches { // all patches must have a jj change-id cid, err := fp.ChangeId() if err != nil { return nil, fmt.Errorf("Stacking is only supported if all patches contain a change-id commit header.") }
title := fp.Title body := fp.Body if override, ok := stackTitles[cid]; ok && strings.TrimSpace(override) != "" { title = override } if override, ok := stackBodies[cid]; ok { body = override } rkey := tid.TID()
mentions, references := s.mentionsResolver.Resolve(ctx, body)
now := time.Now()
pull := models.Pull{ Title: title, Body: body, TargetBranch: targetBranch, OwnerDid: userDid.String(), RepoDid: syntax.DID(repo.RepoDid), Rkey: rkey, Mentions: mentions, References: references, Submissions: []*models.PullSubmission{ { Patch: fp.Raw, SourceRev: fp.SHA, Combined: fp.Raw, Blob: *blobs[i], Created: now, }, }, PullSource: pullSource, Created: now, State: models.PullOpen,
DependentOn: parentAtUri, Repo: repo, }
stack = append(stack, &pull)
parent := pull.AtUri() parentAtUri = &parent }
return stack, nil}