| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "encoding/json" |
| 6 | "fmt" |
| 7 | "os" |
| 8 | "strings" |
| 9 | |
| 10 | "github.com/carlosframework/platform/internal/provision" |
| 11 | "github.com/carlosframework/platform/internal/release" |
| 12 | ) |
| 13 | |
| 14 | // Legacy migrations retain their create-only bytes. A populated sequence |
| 15 | // cannot be transplanted into another key as a new incarnation; that needs |
| 16 | // the claim create protocol, not a raw copy of archived authority. |
| 17 | func putMigrationObject(ctx context.Context, store release.Store, key string, body []byte) (string, error) { |
| 18 | if !hostClaimEnabled(os.Getenv("CARLOS_HOST_CLAIM")) { |
| 19 | return store.Put(ctx, key, body, "") |
| 20 | } |
| 21 | if provision.IsRecordKey(key) { |
| 22 | if err := migrationRecordBytes(key, body); err != nil { |
| 23 | return "", err |
| 24 | } |
| 25 | if _, _, err := provision.RecordSequence(body); err != nil { |
| 26 | // Main copied bodies that are not strict JSON objects verbatim; |
| 27 | // with no sequence in them there is nothing to advance. |
| 28 | return store.Put(ctx, key, body, "") |
| 29 | } |
| 30 | tag, _, err := provision.WriteRecord(ctx, store, key, []byte(`{}`), body, "") |
| 31 | return tag, err |
| 32 | } |
| 33 | return store.Put(ctx, key, body, "") |
| 34 | } |
| 35 | |
| 36 | // Preflight precedes every copy and also runs for --dry-run. The write helper |
| 37 | // repeats the check because a source can change after preflight. |
| 38 | func validateMigrationRecords(ctx context.Context, store release.Store, plan []copyOp) error { |
| 39 | if !hostClaimEnabled(os.Getenv("CARLOS_HOST_CLAIM")) { |
| 40 | return nil |
| 41 | } |
| 42 | for _, c := range plan { |
| 43 | if !provision.IsRecordKey(c.to) { |
| 44 | continue |
| 45 | } |
| 46 | raw, _, err := store.Get(ctx, c.from) |
| 47 | if err != nil { |
| 48 | return err |
| 49 | } |
| 50 | if err = migrationRecordBytes(c.from, raw); err != nil { |
| 51 | return err |
| 52 | } |
| 53 | } |
| 54 | return nil |
| 55 | } |
| 56 | |
| 57 | func migrationRecordBytes(key string, body []byte) error { |
| 58 | if !migrationHasSequence(body) { |
| 59 | return nil |
| 60 | } |
| 61 | return fmt.Errorf("accounts migrate: %s has a host-claim sequence; use the claim create protocol to create a new incarnation: %w", key, provision.ErrRecordSequence) |
| 62 | } |
| 63 | |
| 64 | // Only a present record_seq refuses: main copied malformed bodies, non-objects |
| 65 | // and duplicate keys verbatim, so those still pass. A body no JSON reader can |
| 66 | // parse carries no sequence; one that parses leniently is refused if any key |
| 67 | // could be read as the sequence. |
| 68 | func migrationHasSequence(body []byte) bool { |
| 69 | if fields, _, err := provision.RecordSequence(body); err == nil { |
| 70 | _, present := fields["record_seq"] |
| 71 | return present |
| 72 | } |
| 73 | var loose map[string]json.RawMessage |
| 74 | if json.Unmarshal(body, &loose) != nil { |
| 75 | return false |
| 76 | } |
| 77 | for name := range loose { |
| 78 | if strings.EqualFold(name, "record_seq") { |
| 79 | return true |
| 80 | } |
| 81 | } |
| 82 | return false |
| 83 | } |
| 84 | |
amadan