Mercurial > public > mercurial-scm > hg-stable
diff mercurial/debugcommands.py @ 47676:096ee2e260a3
dirstate-v2: Rename Header to Root, move it to the end of the data file
Now that they don?t have to be at the start, a given data file may contain
multiple "roots". A docket only points to one of them, and previous ones
are left unused to allow allow append-only in-place writing to an existing
data file.
Differential Revision: https://phab.mercurial-scm.org/D11090
| author | Simon Sapin <simon.sapin@octobus.net> |
|---|---|
| date | Mon, 12 Jul 2021 23:05:56 +0200 |
| parents | ff97e793ed36 |
| children | 78f7f0d490ee |
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--- a/mercurial/debugcommands.py Mon Jul 12 22:46:52 2021 +0200 +++ b/mercurial/debugcommands.py Mon Jul 12 23:05:56 2021 +0200 @@ -997,11 +997,13 @@ or nothing for dirstate-v2 """ if repo.dirstate._use_dirstate_v2: - hash_offset = 16 # Four 32-bit integers before this field + docket = repo.dirstate._map.docket hash_len = 20 # 160 bits for SHA-1 - data_filename = repo.dirstate._map.docket.data_filename() + hash_offset = docket.data_size - hash_len # hash is at the end + data_filename = docket.data_filename() with repo.vfs(data_filename) as f: - hash_bytes = f.read(hash_offset + hash_len)[-hash_len:] + f.seek(hash_offset) + hash_bytes = f.read(hash_len) ui.write(binascii.hexlify(hash_bytes) + b'\n')