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Go
at master
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import ( "context" "encoding/json" "fmt" "log/slog" "net/http" "os" "path/filepath" "strings"
securejoin "github.com/cyphar/filepath-securejoin" "github.com/go-chi/chi/v5" "github.com/go-chi/chi/v5/middleware" "github.com/go-git/go-git/v5/plumbing" "tangled.org/core/api/tangled" "tangled.org/core/hook" "tangled.org/core/idresolver" "tangled.org/core/knotserver/config" "tangled.org/core/knotserver/db" "tangled.org/core/knotserver/git" "tangled.org/core/log" "tangled.org/core/notifier" "tangled.org/core/rbac" "tangled.org/core/workflow")
type InternalHandle struct { db *db.DB c *config.Config e *rbac.Enforcer l *slog.Logger n *notifier.Notifier res *idresolver.Resolver}
func (h *InternalHandle) PushAllowed(w http.ResponseWriter, r *http.Request) { user := r.URL.Query().Get("user") repo := r.URL.Query().Get("repo")
if user == "" || repo == "" { w.WriteHeader(http.StatusBadRequest) return }
ok, err := h.e.IsPushAllowed(user, rbac.ThisServer, repo) if err != nil || !ok { w.WriteHeader(http.StatusForbidden) return }
w.WriteHeader(http.StatusNoContent)}
func (h *InternalHandle) InternalKeys(w http.ResponseWriter, r *http.Request) { keys, err := h.db.GetAllPublicKeys() if err != nil { writeError(w, err.Error(), http.StatusInternalServerError) return }
data := make([]map[string]interface{}, 0) for _, key := range keys { j := key.JSON() data = append(data, j) } writeJSON(w, data)}
// response in text/plain format// the body will be qualified repository path on success/push-denied// or an error message when process failedfunc (h *InternalHandle) Guard(w http.ResponseWriter, r *http.Request) { l := h.l.With("handler", "Guard")
var ( incomingUser = r.URL.Query().Get("user") repo = r.URL.Query().Get("repo") gitCommand = r.URL.Query().Get("gitCmd") )
if incomingUser == "" || repo == "" || gitCommand == "" { w.WriteHeader(http.StatusBadRequest) l.Error("invalid request", "incomingUser", incomingUser, "repo", repo, "gitCommand", gitCommand) fmt.Fprintln(w, "invalid internal request") return }
components := strings.Split(strings.TrimPrefix(strings.Trim(repo, "'"), "/"), "/") l.Info("command components", "components", components)
var rbacResource string var diskRelative string
switch { case len(components) == 1 && strings.HasPrefix(components[0], "did:"): repoDid := components[0] repoPath, _, _, lookupErr := h.db.ResolveRepoDIDOnDisk(h.c.Repo.ScanPath, repoDid) if lookupErr != nil { w.WriteHeader(http.StatusNotFound) l.Error("repo DID not found", "repoDid", repoDid, "err", lookupErr) fmt.Fprintln(w, "repo not found") return } rbacResource = repoDid rel, relErr := filepath.Rel(h.c.Repo.ScanPath, repoPath) if relErr != nil { w.WriteHeader(http.StatusInternalServerError) l.Error("failed to compute relative path", "repoPath", repoPath, "err", relErr) fmt.Fprintln(w, "internal error") return } diskRelative = rel
case len(components) == 2: repoOwner := components[0] ownerIdent, resolveErr := h.res.ResolveAtIdentifier(r.Context(), repoOwner) if resolveErr != nil { l.Error("error resolving owner", "owner", repoOwner, "err", resolveErr) w.WriteHeader(http.StatusInternalServerError) fmt.Fprintf(w, "error resolving owner: invalid did or handle\n") return } ownerDid := ownerIdent.DID repoName := components[1] repoDid, didErr := h.db.GetRepoDid(ownerDid.String(), repoName) var repoPath string if didErr == nil { var lookupErr error repoPath, _, _, lookupErr = h.db.ResolveRepoDIDOnDisk(h.c.Repo.ScanPath, repoDid) if lookupErr != nil { w.WriteHeader(http.StatusNotFound) l.Error("repo not found on disk", "repoDid", repoDid, "err", lookupErr) fmt.Fprintln(w, "repo not found") return } rbacResource = repoDid } else { legacyPath, joinErr := securejoin.SecureJoin(h.c.Repo.ScanPath, filepath.Join(ownerDid.String(), repoName)) if joinErr != nil { w.WriteHeader(http.StatusNotFound) fmt.Fprintln(w, "repo not found") return } if _, statErr := os.Stat(legacyPath); statErr != nil { w.WriteHeader(http.StatusNotFound) l.Error("repo not found on disk (legacy)", "owner", ownerDid, "name", repoName) fmt.Fprintln(w, "repo not found") return } repoPath = legacyPath rbacResource = ownerDid.String() + "/" + repoName } rel, relErr := filepath.Rel(h.c.Repo.ScanPath, repoPath) if relErr != nil { w.WriteHeader(http.StatusInternalServerError) l.Error("failed to compute relative path", "repoPath", repoPath, "err", relErr) fmt.Fprintln(w, "internal error") return } diskRelative = rel
default: w.WriteHeader(http.StatusBadRequest) l.Error("invalid repo format", "components", components) fmt.Fprintln(w, "invalid repo format, needs <user>/<repo>, /<user>/<repo>, or <repo-did>") return }
if gitCommand == "git-receive-pack" { ok, err := h.e.IsPushAllowed(incomingUser, rbac.ThisServer, rbacResource) if err != nil || !ok { w.WriteHeader(http.StatusForbidden) fmt.Fprint(w, repo) return } }
w.WriteHeader(http.StatusOK) fmt.Fprint(w, diskRelative)}
type PushOptions struct { skipCi bool verboseCi bool}
func (h *InternalHandle) PostReceiveHook(w http.ResponseWriter, r *http.Request) { l := h.l.With("handler", "PostReceiveHook")
gitAbsoluteDir := r.Header.Get("X-Git-Dir") gitRelativeDir, err := filepath.Rel(h.c.Repo.ScanPath, gitAbsoluteDir) if err != nil { l.Error("failed to calculate relative git dir", "scanPath", h.c.Repo.ScanPath, "gitAbsoluteDir", gitAbsoluteDir) w.WriteHeader(http.StatusInternalServerError) return }
var repoDid string var ownerDid, repoName string
if strings.HasPrefix(gitRelativeDir, "did:") { repoDid = gitRelativeDir var err error ownerDid, repoName, err = h.db.GetRepoKeyOwner(repoDid) if err != nil { l.Error("failed to resolve repo DID from git dir", "repoDid", repoDid, "err", err) w.WriteHeader(http.StatusBadRequest) return } } else { components := strings.SplitN(gitRelativeDir, "/", 2) if len(components) != 2 { l.Error("invalid git dir, expected repo DID or owner/repo", "gitRelativeDir", gitRelativeDir) w.WriteHeader(http.StatusBadRequest) return } ownerDid = components[0] repoName = components[1] var didErr error repoDid, didErr = h.db.GetRepoDid(ownerDid, repoName) if didErr != nil { l.Error("failed to resolve repo DID from legacy path", "gitRelativeDir", gitRelativeDir, "err", didErr) w.WriteHeader(http.StatusBadRequest) return } }
gitUserDid := r.Header.Get("X-Git-User-Did")
lines, err := git.ParsePostReceive(r.Body) if err != nil { l.Error("failed to parse post-receive payload", "err", err) // non-fatal }
// extract any push options pushOptionsRaw := r.Header.Values("X-Git-Push-Option") pushOptions := PushOptions{} for _, option := range pushOptionsRaw { if option == "skip-ci" || option == "ci-skip" { pushOptions.skipCi = true } if option == "verbose-ci" || option == "ci-verbose" { pushOptions.verboseCi = true } }
resp := hook.HookResponse{ Messages: make([]string, 0), }
for _, line := range lines { err := h.insertRefUpdate(line, gitUserDid, ownerDid, repoName, repoDid) if err != nil { l.Error("failed to insert op", "err", err, "line", line, "did", gitUserDid, "repo", gitRelativeDir) }
err = h.emitCompareLink(&resp.Messages, line, ownerDid, repoName, repoDid) if err != nil { l.Error("failed to reply with compare link", "err", err, "line", line, "did", gitUserDid, "repo", gitRelativeDir) }
err = h.triggerPipeline(&resp.Messages, line, gitUserDid, ownerDid, repoName, repoDid, pushOptions) if err != nil { l.Error("failed to trigger pipeline", "err", err, "line", line, "did", gitUserDid, "repo", gitRelativeDir) } }
writeJSON(w, resp)}
func (h *InternalHandle) insertRefUpdate(line git.PostReceiveLine, gitUserDid, ownerDid, repoName, repoDid string) error { repoPath, _, _, resolveErr := h.db.ResolveRepoDIDOnDisk(h.c.Repo.ScanPath, repoDid) if resolveErr != nil { return fmt.Errorf("failed to resolve repo on disk: %w", resolveErr) }
gr, err := git.Open(repoPath, line.Ref) if err != nil { return fmt.Errorf("failed to open git repo at ref %s: %w", line.Ref, err) }
meta, err := gr.RefUpdateMeta(line) if err != nil { return fmt.Errorf("failed to get ref update metadata: %w", err) }
metaRecord := meta.AsRecord()
refUpdate := tangled.GitRefUpdate{ OldSha: line.OldSha.String(), NewSha: line.NewSha.String(), Ref: line.Ref, CommitterDid: gitUserDid, OwnerDid: &ownerDid, RepoName: repoName, RepoDid: &repoDid, Meta: &metaRecord, }
eventJson, err := json.Marshal(refUpdate) if err != nil { return err }
event := db.Event{ Rkey: TID(), Nsid: tangled.GitRefUpdateNSID, EventJson: string(eventJson), }
return h.db.InsertEvent(event, h.n)}
func (h *InternalHandle) triggerPipeline( clientMsgs *[]string, line git.PostReceiveLine, gitUserDid string, ownerDid string, repoName string, repoDid string, pushOptions PushOptions,) error { if pushOptions.skipCi { return nil }
repoPath, _, _, resolveErr := h.db.ResolveRepoDIDOnDisk(h.c.Repo.ScanPath, repoDid) if resolveErr != nil { return fmt.Errorf("failed to resolve repo on disk: %w", resolveErr) }
gr, err := git.Open(repoPath, line.Ref) if err != nil { return err }
workflowDir, err := gr.FileTree(context.Background(), workflow.WorkflowDir) if err != nil { return err }
var pipeline workflow.RawPipeline for _, e := range workflowDir { if !e.IsFile() { continue }
fpath := filepath.Join(workflow.WorkflowDir, e.Name) contents, err := gr.RawContent(fpath) if err != nil { continue }
pipeline = append(pipeline, workflow.RawWorkflow{ Name: e.Name, Contents: contents, }) }
trigger := tangled.Pipeline_PushTriggerData{ Ref: line.Ref, OldSha: line.OldSha.String(), NewSha: line.NewSha.String(), }
triggerRepo := &tangled.Pipeline_TriggerRepo{ Did: ownerDid, Knot: h.c.Server.Hostname, Repo: &repoName, RepoDid: &repoDid, }
compiler := workflow.Compiler{ Trigger: tangled.Pipeline_TriggerMetadata{ Kind: string(workflow.TriggerKindPush), Push: &trigger, Repo: triggerRepo, }, }
cp := compiler.Compile(compiler.Parse(pipeline)) eventJson, err := json.Marshal(cp) if err != nil { return err }
for _, e := range compiler.Diagnostics.Errors { *clientMsgs = append(*clientMsgs, e.String()) }
if pushOptions.verboseCi { if compiler.Diagnostics.IsEmpty() { *clientMsgs = append(*clientMsgs, "success: pipeline compiled with no diagnostics") }
for _, w := range compiler.Diagnostics.Warnings { *clientMsgs = append(*clientMsgs, w.String()) } }
// do not run empty pipelines if cp.Workflows == nil { return nil }
event := db.Event{ Rkey: TID(), Nsid: tangled.PipelineNSID, EventJson: string(eventJson), }
return h.db.InsertEvent(event, h.n)}
func (h *InternalHandle) emitCompareLink( clientMsgs *[]string, line git.PostReceiveLine, ownerDid string, repoName string, repoDid string,) error { // this is a second push to a branch, don't reply with the link again if !line.OldSha.IsZero() { return nil }
// the ref was not updated to a new hash, don't reply with the link // // NOTE: do we need this? if line.NewSha.String() == line.OldSha.String() { return nil }
pushedRef := plumbing.ReferenceName(line.Ref)
userIdent, err := h.res.ResolveIdent(context.Background(), ownerDid) user := ownerDid if err == nil { user = userIdent.Handle.String() }
repoPath, _, _, resolveErr := h.db.ResolveRepoDIDOnDisk(h.c.Repo.ScanPath, repoDid) if resolveErr != nil { return fmt.Errorf("failed to resolve repo on disk: %w", resolveErr) }
gr, err := git.PlainOpen(repoPath) if err != nil { return err }
defaultBranch, err := gr.FindMainBranch() if err != nil { return err }
// pushing to default branch if pushedRef == plumbing.NewBranchReferenceName(defaultBranch) { return nil }
// pushing a tag, don't prompt the user the open a PR if pushedRef.IsTag() { return nil }
ZWS := "\u200B" *clientMsgs = append(*clientMsgs, ZWS) *clientMsgs = append(*clientMsgs, fmt.Sprintf("Create a PR pointing to %s", defaultBranch)) *clientMsgs = append(*clientMsgs, fmt.Sprintf("\t%s/%s/%s/compare/%s...%s", h.c.AppViewEndpoint, user, repoName, defaultBranch, strings.TrimPrefix(line.Ref, "refs/heads/"))) *clientMsgs = append(*clientMsgs, ZWS) return nil}
func Internal(ctx context.Context, c *config.Config, db *db.DB, e *rbac.Enforcer, n *notifier.Notifier, res *idresolver.Resolver) http.Handler { r := chi.NewRouter() l := log.FromContext(ctx) l = log.SubLogger(l, "internal")
h := InternalHandle{ db: db, c: c, e: e, l: l, n: n, res: res, }
r.Get("/push-allowed", h.PushAllowed) r.Get("/keys", h.InternalKeys) r.Get("/guard", h.Guard) r.Post("/hooks/post-receive", h.PostReceiveHook) r.Mount("/debug", middleware.Profiler())
return r}