nekomimi.pet
forked from
tangled.org/core
Monorepo for Tangled
16 kB
588 lines
1package knotserver
2
3import (
4 "context"
5 "encoding/json"
6 "fmt"
7 "log/slog"
8 "net"
9 "net/http"
10 "net/url"
11 "os"
12 "path"
13 "path/filepath"
14 "strings"
15
16 securejoin "github.com/cyphar/filepath-securejoin"
17 "github.com/go-chi/chi/v5"
18 "github.com/go-chi/chi/v5/middleware"
19 "github.com/go-git/go-git/v5/plumbing"
20 "tangled.org/core/api/tangled"
21 "tangled.org/core/eventstream"
22 "tangled.org/core/hook"
23 "tangled.org/core/idresolver"
24 "tangled.org/core/knotserver/config"
25 "tangled.org/core/knotserver/db"
26 "tangled.org/core/knotserver/git"
27 "tangled.org/core/log"
28 "tangled.org/core/notifier"
29 "tangled.org/core/rbac"
30 "tangled.org/core/tid"
31 "tangled.org/core/workflow"
32)
33
34type InternalHandle struct {
35 db *db.DB
36 c *config.Config
37 e *rbac.Enforcer
38 l *slog.Logger
39 n *notifier.Notifier
40 res *idresolver.Resolver
41}
42
43func (h *InternalHandle) PushAllowed(w http.ResponseWriter, r *http.Request) {
44 user := r.URL.Query().Get("user")
45 repo := r.URL.Query().Get("repo")
46
47 if user == "" || repo == "" {
48 w.WriteHeader(http.StatusBadRequest)
49 return
50 }
51
52 ok, err := h.e.IsPushAllowed(user, rbac.ThisServer, repo)
53 if err != nil || !ok {
54 w.WriteHeader(http.StatusForbidden)
55 return
56 }
57
58 w.WriteHeader(http.StatusNoContent)
59}
60
61func (h *InternalHandle) InternalKeys(w http.ResponseWriter, r *http.Request) {
62 keys, err := h.db.GetAllPublicKeys()
63 if err != nil {
64 writeError(w, err.Error(), http.StatusInternalServerError)
65 return
66 }
67
68 data := make([]map[string]interface{}, 0)
69 for _, key := range keys {
70 j := key.JSON()
71 data = append(data, j)
72 }
73 writeJSON(w, data)
74}
75
76// response in text/plain format
77// the body will be qualified repository path on success/push-denied
78// or an error message when process failed
79func (h *InternalHandle) Guard(w http.ResponseWriter, r *http.Request) {
80 l := h.l.With("handler", "Guard")
81
82 var (
83 incomingUser = r.URL.Query().Get("user")
84 repo = r.URL.Query().Get("repo")
85 gitCommand = r.URL.Query().Get("gitCmd")
86 )
87
88 if incomingUser == "" || repo == "" || gitCommand == "" {
89 w.WriteHeader(http.StatusBadRequest)
90 l.Error("invalid request", "incomingUser", incomingUser, "repo", repo, "gitCommand", gitCommand)
91 fmt.Fprintln(w, "invalid internal request")
92 return
93 }
94
95 components := strings.Split(strings.TrimPrefix(strings.Trim(repo, "'"), "/"), "/")
96 l.Info("command components", "components", components)
97
98 var rbacResource string
99 var diskRelative string
100
101 switch {
102 case len(components) == 1 && strings.HasPrefix(components[0], "did:"):
103 repoDid := components[0]
104 repoPath, _, _, lookupErr := h.db.ResolveRepoDIDOnDisk(h.c.Repo.ScanPath, repoDid)
105 if lookupErr != nil {
106 w.WriteHeader(http.StatusNotFound)
107 l.Error("repo DID not found", "repoDid", repoDid, "err", lookupErr)
108 fmt.Fprintln(w, "repo not found")
109 return
110 }
111 rbacResource = repoDid
112 rel, relErr := filepath.Rel(h.c.Repo.ScanPath, repoPath)
113 if relErr != nil {
114 w.WriteHeader(http.StatusInternalServerError)
115 l.Error("failed to compute relative path", "repoPath", repoPath, "err", relErr)
116 fmt.Fprintln(w, "internal error")
117 return
118 }
119 diskRelative = rel
120
121 case len(components) == 2:
122 repoOwner := components[0]
123 ownerIdent, resolveErr := h.res.ResolveAtIdentifier(r.Context(), repoOwner)
124 if resolveErr != nil {
125 l.Error("error resolving owner", "owner", repoOwner, "err", resolveErr)
126 w.WriteHeader(http.StatusInternalServerError)
127 fmt.Fprintf(w, "error resolving owner: invalid did or handle\n")
128 return
129 }
130 ownerDid := ownerIdent.DID
131 repoName := components[1]
132 repoDid, didErr := h.db.GetRepoDid(ownerDid.String(), repoName)
133 var repoPath string
134 if didErr == nil {
135 var lookupErr error
136 repoPath, _, _, lookupErr = h.db.ResolveRepoDIDOnDisk(h.c.Repo.ScanPath, repoDid)
137 if lookupErr != nil {
138 w.WriteHeader(http.StatusNotFound)
139 l.Error("repo not found on disk", "repoDid", repoDid, "err", lookupErr)
140 fmt.Fprintln(w, "repo not found")
141 return
142 }
143 rbacResource = repoDid
144 } else {
145 legacyPath, joinErr := securejoin.SecureJoin(h.c.Repo.ScanPath, filepath.Join(ownerDid.String(), repoName))
146 if joinErr != nil {
147 w.Header().Set("Content-Type", "text/plain; charset=UTF-8")
148 w.WriteHeader(http.StatusNotFound)
149 fmt.Fprint(w, "repo not found\n")
150 return
151 }
152 if _, statErr := os.Stat(legacyPath); statErr != nil {
153 l.Info("legacy repo path missing, checking rename history", "owner", ownerDid, "name", repoName)
154 w.Header().Set("Content-Type", "text/plain; charset=UTF-8")
155 w.WriteHeader(http.StatusNotFound)
156 fmt.Fprint(w, "repo not found\n")
157 return
158 }
159 repoPath = legacyPath
160 rbacResource = ownerDid.String() + "/" + repoName
161 }
162 rel, relErr := filepath.Rel(h.c.Repo.ScanPath, repoPath)
163 if relErr != nil {
164 w.WriteHeader(http.StatusInternalServerError)
165 l.Error("failed to compute relative path", "repoPath", repoPath, "err", relErr)
166 fmt.Fprintln(w, "internal error")
167 return
168 }
169 diskRelative = rel
170
171 default:
172 w.WriteHeader(http.StatusBadRequest)
173 l.Error("invalid repo format", "components", components)
174 fmt.Fprintln(w, "invalid repo format, needs <user>/<repo>, /<user>/<repo>, or <repo-did>")
175 return
176 }
177
178 if gitCommand == "git-receive-pack" {
179 ok, err := h.e.IsPushAllowed(incomingUser, rbac.ThisServer, rbacResource)
180 if err != nil || !ok {
181 w.WriteHeader(http.StatusForbidden)
182 fmt.Fprint(w, repo)
183 return
184 }
185 }
186
187 w.WriteHeader(http.StatusOK)
188 fmt.Fprint(w, diskRelative)
189}
190
191func (h *InternalHandle) PostReceiveHook(w http.ResponseWriter, r *http.Request) {
192 l := h.l.With("handler", "PostReceiveHook")
193
194 gitAbsoluteDir := r.Header.Get("X-Git-Dir")
195 gitRelativeDir, err := filepath.Rel(h.c.Repo.ScanPath, gitAbsoluteDir)
196 if err != nil {
197 l.Error("failed to calculate relative git dir", "scanPath", h.c.Repo.ScanPath, "gitAbsoluteDir", gitAbsoluteDir)
198 w.WriteHeader(http.StatusInternalServerError)
199 return
200 }
201
202 var repoDid string
203 var ownerDid, repoName string
204
205 if strings.HasPrefix(gitRelativeDir, "did:") {
206 repoDid = gitRelativeDir
207 var err error
208 ownerDid, repoName, err = h.db.GetRepoKeyOwner(repoDid)
209 if err != nil {
210 l.Error("failed to resolve repo DID from git dir", "repoDid", repoDid, "err", err)
211 w.WriteHeader(http.StatusBadRequest)
212 return
213 }
214 } else {
215 components := strings.SplitN(gitRelativeDir, "/", 2)
216 if len(components) != 2 {
217 l.Error("invalid git dir, expected repo DID or owner/repo", "gitRelativeDir", gitRelativeDir)
218 w.WriteHeader(http.StatusBadRequest)
219 return
220 }
221 ownerDid = components[0]
222 repoName = components[1]
223 var didErr error
224 repoDid, didErr = h.db.GetRepoDid(ownerDid, repoName)
225 if didErr != nil {
226 l.Error("failed to resolve repo DID from legacy path", "gitRelativeDir", gitRelativeDir, "err", didErr)
227 w.WriteHeader(http.StatusBadRequest)
228 return
229 }
230 }
231
232 gitUserDid := r.Header.Get("X-Git-User-Did")
233
234 lines, err := git.ParsePostReceive(r.Body)
235 if err != nil {
236 l.Error("failed to parse post-receive payload", "err", err)
237 // non-fatal
238 }
239
240 // extract max 50 push options
241 pushOptions := r.Header.Values("X-Git-Push-Option")
242 if len(pushOptions) > 50 {
243 pushOptions = pushOptions[:50]
244 }
245
246 repoPath, _, _, resolveErr := h.db.ResolveRepoDIDOnDisk(h.c.Repo.ScanPath, repoDid)
247 if resolveErr != nil {
248 l.Error("failed to resolve repo on disk", "repoDid", repoDid, "err", resolveErr)
249 w.WriteHeader(http.StatusInternalServerError)
250 return
251 }
252
253 resp := hook.HookResponse{
254 Messages: make([]string, 0),
255 }
256
257 for _, line := range lines {
258 err := h.insertRefUpdate(line, gitUserDid, ownerDid, repoDid, repoPath, pushOptions)
259 if err != nil {
260 l.Error("failed to insert op", "err", err, "line", line, "did", gitUserDid, "repo", gitRelativeDir)
261 }
262
263 err = h.emitPullRequestLink(&resp.Messages, line, ownerDid, repoName, repoDid)
264 if err != nil {
265 l.Error("failed to reply with pull request link", "err", err, "line", line, "did", gitUserDid, "repo", gitRelativeDir)
266 }
267
268 if !git.HasSkipCIPushOption(pushOptions) {
269 verbose := hasVerboseCIPushOption(pushOptions)
270 if err := h.emitCiDiagnostics(&resp.Messages, line, ownerDid, repoName, repoDid, repoPath, verbose); err != nil {
271 l.Error("failed to emit ci diagnostics", "err", err, "line", line, "did", gitUserDid, "repo", gitRelativeDir)
272 }
273 }
274
275 // emit pipeline logs link
276 if h.c.LogsAddr != "" {
277 host, port, err := net.SplitHostPort(h.c.LogsAddr)
278 if err == nil {
279 resp.Messages = append(resp.Messages, "→ Browse CI logs in your terminal:")
280 resp.Messages = append(resp.Messages, fmt.Sprintf(" ssh -t -p %s %s %s %s", port, host, repoDid, line.NewSha))
281 }
282 }
283 }
284
285 writeJSON(w, resp)
286}
287
288func (h *InternalHandle) insertRefUpdate(line git.PostReceiveLine, gitUserDid, ownerDid, repoDid string, repoPath string, pushOptions []string) error {
289 refUpdate := tangled.GitRefUpdate{
290 OldSha: line.OldSha.String(),
291 NewSha: line.NewSha.String(),
292 Ref: line.Ref,
293 CommitterDid: gitUserDid,
294 OwnerDid: &ownerDid,
295 Repo: repoDid,
296 Meta: nil,
297 PushOptions: pushOptions,
298 }
299
300 if !line.NewSha.IsZero() {
301
302 gr, err := git.Open(repoPath, line.Ref)
303 if err != nil {
304 return fmt.Errorf("failed to open git repo at ref %s: %w", line.Ref, err)
305 }
306
307 changedFiles, err := gr.ChangedFilesBetween(line.OldSha.String(), line.NewSha.String())
308 if err != nil {
309 return fmt.Errorf("failed to get ref update changed files: %w", err)
310 }
311 refUpdate.ChangedFiles = changedFiles
312
313 meta, err := gr.RefUpdateMeta(line)
314 if err != nil {
315 return fmt.Errorf("failed to get ref update metadata: %w", err)
316 }
317
318 refUpdate.Meta = new(tangled.GitRefUpdate_Meta)
319 *refUpdate.Meta = meta.AsRecord()
320 }
321
322 eventJson, err := json.Marshal(refUpdate)
323 if err != nil {
324 return err
325 }
326
327 event := eventstream.Event{
328 Rkey: tid.TID(),
329 Nsid: tangled.GitRefUpdateNSID,
330 EventJson: eventJson,
331 }
332
333 return h.db.InsertEvent(event, h.n)
334}
335
336func hasVerboseCIPushOption(pushOptions []string) bool {
337 for _, opt := range pushOptions {
338 switch opt {
339 case "verbose-ci", "ci-verbose":
340 return true
341 }
342 }
343 return false
344}
345
346func (h *InternalHandle) emitCiDiagnostics(
347 clientMsgs *[]string,
348 line git.PostReceiveLine,
349 ownerDid string,
350 repoName string,
351 repoDid string,
352 repoPath string,
353 verbose bool,
354) error {
355 if line.NewSha.IsZero() {
356 return nil
357 }
358
359 gr, err := git.Open(repoPath, line.Ref)
360 if err != nil {
361 return fmt.Errorf("failed to open git repo at ref %s: %w", line.Ref, err)
362 }
363
364 workflowDir, err := gr.FileTree(context.Background(), workflow.WorkflowDir)
365 if err != nil {
366 return nil
367 }
368
369 var pipeline workflow.RawPipeline
370 for _, e := range workflowDir {
371 if !e.IsFile() {
372 continue
373 }
374
375 fpath := filepath.Join(workflow.WorkflowDir, e.Name)
376 contents, err := gr.RawContent(fpath)
377 if err != nil {
378 continue
379 }
380
381 pipeline = append(pipeline, workflow.RawWorkflow{
382 Name: e.Name,
383 Contents: contents,
384 })
385 }
386
387 defaultBranch, _ := gr.FindMainBranch()
388
389 trigger := tangled.Pipeline_PushTriggerData{
390 Ref: line.Ref,
391 OldSha: line.OldSha.String(),
392 NewSha: line.NewSha.String(),
393 }
394
395 triggerRepo := &tangled.Pipeline_TriggerRepo{
396 Did: ownerDid,
397 Knot: h.c.Server.Hostname,
398 Repo: &repoName,
399 RepoDid: &repoDid,
400 DefaultBranch: defaultBranch,
401 }
402
403 changedFiles, err := gr.ChangedFilesBetween(line.OldSha.String(), line.NewSha.String())
404 if err != nil {
405 return fmt.Errorf("getting changed files: %w", err)
406 }
407
408 compiler := workflow.Compiler{
409 Trigger: tangled.Pipeline_TriggerMetadata{
410 Kind: string(workflow.TriggerKindPush),
411 Push: &trigger,
412 Repo: triggerRepo,
413 },
414 ChangedFiles: changedFiles,
415 }
416
417 compiler.Compile(compiler.Parse(pipeline))
418
419 for _, e := range compiler.Diagnostics.Errors {
420 *clientMsgs = append(*clientMsgs, e.String())
421 }
422 if verbose {
423 if compiler.Diagnostics.IsEmpty() {
424 *clientMsgs = append(*clientMsgs, "success: pipeline compiled with no diagnostics")
425 }
426 for _, w := range compiler.Diagnostics.Warnings {
427 *clientMsgs = append(*clientMsgs, w.String())
428 }
429 }
430
431 return nil
432}
433
434func (h *InternalHandle) emitPullRequestLink(
435 clientMsgs *[]string,
436 line git.PostReceiveLine,
437 ownerDid string,
438 repoName string,
439 repoDid string,
440) error {
441 if line.NewSha.IsZero() {
442 return nil
443 }
444
445 // the ref was not updated to a new hash, don't reply with the link
446 //
447 // NOTE: do we need this?
448 if line.NewSha == line.OldSha {
449 return nil
450 }
451
452 pushedRef := plumbing.ReferenceName(line.Ref)
453 if !pushedRef.IsBranch() {
454 return nil
455 }
456
457 if !line.OldSha.IsZero() {
458 return nil
459 }
460
461 repoPath, _, _, resolveErr := h.db.ResolveRepoDIDOnDisk(h.c.Repo.ScanPath, repoDid)
462 if resolveErr != nil {
463 return fmt.Errorf("failed to resolve repo on disk: %w", resolveErr)
464 }
465
466 gr, err := git.PlainOpen(repoPath)
467 if err != nil {
468 return err
469 }
470
471 remote, err := gr.Remote()
472 if err != nil {
473 return fmt.Errorf("checking for upstream remote: %w", err)
474 }
475
476 defaultBranch, err := gr.FindMainBranch()
477 if err != nil {
478 return err
479 }
480
481 pushedBranch := pushedRef.Short()
482
483 // pushing to default branch
484 if pushedBranch == defaultBranch {
485 return nil
486 }
487
488 userIdent, err := h.res.ResolveIdent(context.Background(), ownerDid)
489 user := ownerDid
490 if err == nil {
491 user = userIdent.Handle.String()
492 }
493
494 pullURL, err := h.createPullURL(h.c.AppViewEndpoint, remote, user, repoDid, repoName, pushedBranch, defaultBranch)
495 if err != nil {
496 return err
497 }
498
499 ZWS := "\u200B"
500 *clientMsgs = append(*clientMsgs, ZWS)
501 *clientMsgs = append(*clientMsgs, "→ Open pull request:")
502 *clientMsgs = append(*clientMsgs, " "+pullURL)
503 *clientMsgs = append(*clientMsgs, ZWS)
504 return nil
505}
506
507func (h *InternalHandle) createPullURL(appviewURL, remote, user, repoDid, repoName, pushedBranch, defaultBranch string) (string, error) {
508 if remote != "" {
509 return h.createForkPullURL(appviewURL, remote, repoDid, pushedBranch, defaultBranch)
510 }
511
512 query := url.Values{}
513
514 query.Set("source", "branch")
515 query.Set("sourceBranch", pushedBranch)
516 query.Set("targetBranch", defaultBranch)
517
518 basePath, err := url.JoinPath(appviewURL, user, repoName, "pulls", "new")
519 if err != nil {
520 return "", err
521 }
522 pullURL := basePath + "?" + query.Encode()
523 return pullURL, nil
524}
525
526func (h *InternalHandle) createForkPullURL(appviewURL, remote, repoDid, pushedBranch, defaultBranch string) (string, error) {
527 query := url.Values{}
528
529 query.Set("fork", repoDid)
530 query.Set("source", "fork")
531 query.Set("sourceBranch", pushedBranch)
532 query.Set("targetBranch", defaultBranch)
533
534 repoPath, err := h.getRemoteOwnerRepoNamePath(remote)
535 if err != nil {
536 return "", err
537 }
538
539 basePath, err := url.JoinPath(appviewURL, repoPath, "pulls", "new")
540 if err != nil {
541 return "", err
542 }
543 pullURL := basePath + "?" + query.Encode()
544 return pullURL, nil
545}
546
547func (h *InternalHandle) getRemoteOwnerRepoNamePath(remote string) (string, error) {
548 u, err := url.Parse(remote)
549 if err != nil {
550 return "", fmt.Errorf("invalid remote: %w", err)
551 }
552
553 if u.Scheme != "file" {
554 return u.Path, nil
555 }
556
557 repoDid := path.Base(u.String())
558
559 owner, name, err := h.db.GetRepoKeyOwner(repoDid)
560 if err != nil {
561 return "", err
562 }
563
564 return fmt.Sprintf("%s/%s", owner, name), nil
565}
566
567func Internal(ctx context.Context, c *config.Config, db *db.DB, e *rbac.Enforcer, n *notifier.Notifier, res *idresolver.Resolver) http.Handler {
568 r := chi.NewRouter()
569 l := log.FromContext(ctx)
570 l = log.SubLogger(l, "internal")
571
572 h := InternalHandle{
573 db: db,
574 c: c,
575 e: e,
576 l: l,
577 n: n,
578 res: res,
579 }
580
581 r.Get("/push-allowed", h.PushAllowed)
582 r.Get("/keys", h.InternalKeys)
583 r.Get("/guard", h.Guard)
584 r.Post("/hooks/post-receive", h.PostReceiveHook)
585 r.Mount("/debug", middleware.Profiler())
586
587 return r
588}