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Monorepo for Tangled
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Go
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import ( "archive/tar" "bytes" "compress/gzip" "context" "encoding/json" "fmt" "io" "io/fs" "os" "path/filepath" "strings"
indigoxrpc "github.com/bluesky-social/indigo/xrpc" "tangled.org/core/api/tangled" "tangled.org/core/appview/cloudflare" "tangled.org/core/appview/config" "tangled.org/core/appview/models")
// DomainMapping is the value stored in Workers KV, keyed by the bare domain.// Repos maps repo name → RepoEntry; at most one repo may have IsIndex = true.type DomainMapping struct { Did string `json:"did"` Repos map[string]RepoEntry `json:"repos"`}
// RepoEntry is the per-repo value within a DomainMapping. Rkey is the// repository's atproto record key, which identifies the {did}/{rkey}/// prefix in R2 where the site's objects live.type RepoEntry struct { Rkey string `json:"rkey"` IsIndex bool `json:"is_index"`}
// UnmarshalJSON makes DomainMapping tolerant of the legacy KV shape where// repos was map[string]bool (keyed by rkey, value = is_index). For each// entry it tries the new {rkey, is_index} struct first; if that fails it// falls back to a bare bool, using the map key itself as the rkey.func (m *DomainMapping) UnmarshalJSON(data []byte) error { var raw struct { Did string `json:"did"` Repos map[string]json.RawMessage `json:"repos"` } if err := json.Unmarshal(data, &raw); err != nil { return err } m.Did = raw.Did m.Repos = make(map[string]RepoEntry, len(raw.Repos)) for name, val := range raw.Repos { var entry RepoEntry if err := json.Unmarshal(val, &entry); err == nil { m.Repos[name] = entry continue } // legacy shape: value is a bare bool; map key is the rkey var isIndex bool if err := json.Unmarshal(val, &isIndex); err != nil { return fmt.Errorf("unsupported repo entry for %q: %w", name, err) } m.Repos[name] = RepoEntry{Rkey: name, IsIndex: isIndex} } return nil}
// getOrNewMapping fetches the existing KV entry for domain, or returns a// fresh empty mapping for the given did if none exists yet.func getOrNewMapping(ctx context.Context, cf *cloudflare.Client, domain, did string) (DomainMapping, error) { raw, err := cf.KVGet(ctx, domain) if err != nil { return DomainMapping{}, fmt.Errorf("reading domain mapping for %q: %w", domain, err) } if raw == nil { return DomainMapping{Did: did, Repos: make(map[string]RepoEntry)}, nil } var m DomainMapping if err := json.Unmarshal(raw, &m); err != nil { return DomainMapping{}, fmt.Errorf("unmarshalling domain mapping for %q: %w", domain, err) } if m.Repos == nil { m.Repos = make(map[string]RepoEntry) } return m, nil}
// PutDomainMapping adds or updates a single repo entry within the per-domain// KV record. If isIndex is true, any previously indexed repo is demoted first.func PutDomainMapping(ctx context.Context, cf *cloudflare.Client, domain, did, repoName, repoRkey string, isIndex bool) error { m, err := getOrNewMapping(ctx, cf, domain, did) if err != nil { return err }
m.Did = did
if isIndex { for name, entry := range m.Repos { if name == repoName { continue } if entry.IsIndex { entry.IsIndex = false m.Repos[name] = entry } } }
m.Repos[repoName] = RepoEntry{Rkey: repoRkey, IsIndex: isIndex}
val, err := json.Marshal(m) if err != nil { return fmt.Errorf("marshalling domain mapping: %w", err) } if err := cf.KVPut(ctx, domain, val); err != nil { return fmt.Errorf("putting domain mapping for %q: %w", domain, err) } return nil}
// DeleteDomainMapping removes a single repo from the per-domain KV record.// If it was the last repo, the key is deleted entirely.func DeleteDomainMapping(ctx context.Context, cf *cloudflare.Client, domain, repoName string) error { m, err := getOrNewMapping(ctx, cf, domain, "") if err != nil { return err }
delete(m.Repos, repoName)
if len(m.Repos) == 0 { if err := cf.KVDelete(ctx, domain); err != nil { return fmt.Errorf("deleting domain mapping for %q: %w", domain, err) } return nil }
val, err := json.Marshal(m) if err != nil { return fmt.Errorf("marshalling domain mapping: %w", err) } if err := cf.KVPut(ctx, domain, val); err != nil { return fmt.Errorf("putting domain mapping for %q: %w", domain, err) } return nil}
// DeleteAllDomainMappings removes the KV entry for a domain entirely.// Used when a user releases their domain claim.func DeleteAllDomainMappings(ctx context.Context, cf *cloudflare.Client, domain string) error { if err := cf.KVDelete(ctx, domain); err != nil { return fmt.Errorf("deleting all domain mappings for %q: %w", domain, err) } return nil}
// prefix returns the R2 key prefix for a given repo: "{did}/{repo}/".// All site objects live under this prefix.func prefix(repoDid, repoName string) string { return repoDid + "/" + repoName + "/"}
// Deploy fetches the repo archive at the given branch from knotHost, extracts// deployDir from it, and syncs the resulting files to R2 via cf.SyncFiles.// It is the authoritative entry-point for deploying a git site.func Deploy( ctx context.Context, cf *cloudflare.Client, config *config.Config, f *models.Repo, branch string, deployDir string,) error { tmpDir, err := os.MkdirTemp("", "tangled-sites-*") if err != nil { return fmt.Errorf("creating temp dir: %w", err) } defer os.RemoveAll(tmpDir)
if err := extractArchive(ctx, config, f, branch, tmpDir); err != nil { return fmt.Errorf("extracting archive: %w", err) }
// deployDir is absolute within the repo (e.g. "/" or "/docs"). // Map it to a path inside tmpDir. deployRoot := filepath.Join(tmpDir, filepath.FromSlash(deployDir))
files := make(map[string][]byte) err = filepath.WalkDir(deployRoot, func(p string, d fs.DirEntry, err error) error { if err != nil { return err } if d.IsDir() { return nil } content, err := os.ReadFile(p) if err != nil { return err } rel, err := filepath.Rel(deployRoot, p) if err != nil { return err } files[filepath.ToSlash(rel)] = content return nil }) if err != nil { return fmt.Errorf("walking deploy dir: %w", err) }
if err := cf.SyncFiles(ctx, prefix(f.Did, f.Rkey), files); err != nil { return fmt.Errorf("syncing files to R2: %w", err) }
return nil}
// Delete removes all R2 objects for a repo site.func Delete(ctx context.Context, cf *cloudflare.Client, repoDid, repoName string) error { if err := cf.DeleteFiles(ctx, prefix(repoDid, repoName)); err != nil { return fmt.Errorf("deleting site files from R2: %w", err) } return nil}
// extractArchive fetches the tar.gz archive for the given repo+branch from// the knot via XRPC and extracts it into destDir.func extractArchive(ctx context.Context, config *config.Config, f *models.Repo, branch, destDir string) error { scheme := "https" if config.Core.Dev { scheme = "http" } knotHost := fmt.Sprintf("%s://%s", scheme, f.Knot)
xrpcc := &indigoxrpc.Client{Host: knotHost} data, err := tangled.RepoArchive(ctx, xrpcc, "tar.gz", "", branch, f.RepoIdentifier()) if err != nil { return fmt.Errorf("fetching archive: %w", err) }
gz, err := gzip.NewReader(bytes.NewReader(data)) if err != nil { return fmt.Errorf("opening gzip stream: %w", err) } defer gz.Close()
tr := tar.NewReader(gz) for { hdr, err := tr.Next() if err == io.EOF { break } if err != nil { return fmt.Errorf("reading tar: %w", err) }
// The knot always adds a leading prefix dir (e.g. "myrepo-main/"); strip it. name := hdr.Name i := strings.Index(name, "/") if i < 0 { continue } name = name[i+1:] if name == "" { continue }
target := filepath.Join(destDir, filepath.FromSlash(name))
// Guard against zip-slip. if !strings.HasPrefix(target, filepath.Clean(destDir)+string(os.PathSeparator)) { continue }
switch hdr.Typeflag { case tar.TypeDir: if err := os.MkdirAll(target, 0o755); err != nil { return err } case tar.TypeReg: if err := os.MkdirAll(filepath.Dir(target), 0o755); err != nil { return err } f, err := os.OpenFile(target, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, hdr.FileInfo().Mode()) if err != nil { return err } if _, err := io.Copy(f, tr); err != nil { f.Close() return err } f.Close() } }
return nil}