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

--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

									
										tests/integration/test_fault_injection.py
									
		+1
		-1
	
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				@@ -36,7 +36,7 @@ from common import (  # noqa: E402

				    verify_transfer,

				)

				PROTOCOL_VERSION = b"2.20.0"

				PROTOCOL_VERSION = b"2.21.0"

				STATUS_MANIFEST = 5

				STATUS_OK = 0