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feat(dry-run): server-contacting --dry-run (protocol 2.21.0)

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--dry-run now handshakes with a remote/daemon receiver and reports what
WOULD transfer/skip based on receiver state, mutating nothing on either
side.

- Serialize Config.dry_run into the wire config frame and append
  STATUS_DRY_RUN_TRANSFER to the status enum (no renumbering); bump
  PROTOCOL_VERSION/CMake VERSION/CHANGELOG/golden wire to 2.21.0.
- Receiver: receive_incremental_check_ex runs the normal read-only
  decision and answers STATUS_OK (skip) or STATUS_DRY_RUN_TRANSFER
  (would transfer) with no basis materialization/append/delta/full
  transfer.  All mutation sites are guarded by !dry_run: file store,
  manifest deletes, --mkpath root creation, --delay-updates staging,
  publication, directory-time application, and outcome acks.
- Client: send_dry_run_remote connects, sends the config, checks each
  regular file and prints the would-transfer set + trailer; no file data
  or delete manifest is sent.  Plain local destinations keep the
  client-side manifest.
This commit is contained in:
TapTap
2026-09-13 11:56:05 +02:00
parent 72cccaa256
commit 6f974eff19
21 changed files with 632 additions and 46 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/shared/config.c
+6 -6
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@@ -21,7 +21,6 @@ static void config_set_defaults(Config* config) {
config->scanner_threads = 0;
config->metadata_explicitly_disabled = false;
config->show_progress = false;
config->dry_run = false;
config->compression_threads = 0;
config->ssh_port = 22;
config->transport = TRANSPORT_TCP;
@@ -42,6 +41,7 @@ static void config_set_defaults(Config* config) {
config->tls_ca = NULL;
config->server_host = str_dup("127.0.0.1");
config->server_port = 8080;
config->server_port_set = false;
/* 0 means "--timeout not given": the transport keeps its own built-in 30 s
* socket timeout (tcp_set_timeouts ignores non-positive values) and the
* protocol layer keeps its built-in 60 s per-message deadline. A positive
@@ -190,11 +190,11 @@ static bool validate_received_config(const Config* config) {
valid_wire_bool(config->delay_updates) && valid_wire_bool(config->mkpath) &&
valid_wire_bool(config->partial) && valid_wire_bool(config->delete_before) &&
valid_wire_bool(config->checksum) && valid_wire_bool(config->eight_bit_output) &&
checksum_algo_valid(config->checksum_algo) && identity_wire_valid(config) &&
valid_wire_bool(config->preserve_atimes) && valid_wire_bool(config->preserve_crtimes) &&
valid_wire_bool(config->omit_dir_times) && valid_wire_bool(config->omit_link_times) &&
valid_wire_bool(config->munge_links) && valid_wire_bool(config->keep_dirlinks) &&
valid_wire_bool(config->fake_super) &&
valid_wire_bool(config->dry_run) && checksum_algo_valid(config->checksum_algo) &&
identity_wire_valid(config) && valid_wire_bool(config->preserve_atimes) &&
valid_wire_bool(config->preserve_crtimes) && valid_wire_bool(config->omit_dir_times) &&
valid_wire_bool(config->omit_link_times) && valid_wire_bool(config->munge_links) &&
valid_wire_bool(config->keep_dirlinks) && valid_wire_bool(config->fake_super) &&
(!config->copy_as_set || (config->copy_as_uid >= 0 && config->copy_as_gid >= 0)) &&
(!config->use_compression ||
(config->compression_level >= 1 && config->compression_level <= 22)) &&