dirstate-v2: Store unsigned integers inside DirstateEntry
The negative marker values are not used anymore.
Differential Revision: https://phab.mercurial-scm.org/D11634
dirstate-v2: Truncate directory mtimes to 31 bits of seconds
… instead of 64 bits, while keeping the sub-second presision.
This brings the size of one timestamp from 12 bytes to 8 bytes.
31 bits is chosen instead of 32 because that’s already what happens for the
mtime of files and symlinks, because dirstate-v1 uses negative i32 values as
markers.
Later we’ll add sub-second precision for file/symlink mtimes, making their
dirstate-v2 representation the same as for directories.
Differential Revision: https://phab.mercurial-scm.org/D11633
dirstate-v2: Separate Rust structs for Timestamp and PackedTimestamp
PackedTimestamp is now exclusively for dirstate-v2 serialization purpose.
It contains unaligned big-endian integers. Timestamp is used everywhere else
and contains native Rust integers.
Differential Revision: https://phab.mercurial-scm.org/D11632
dirstate-v2: Change the representation of negative directory mtime
Change it from how I previously thought C’s `timespec` works
to how it actually works.
The previous behavior was also buggy for timestamps strictly before the
epoch but less than one second away from it, because two’s complement
does not distinguish negative zero from positive zero.
Differential Revision: https://phab.mercurial-scm.org/D11629
dirstate-v2: Only convert from SystemTime to Timestamp and not back
Converting from Timestamp back to SystemTime was only used for equality
comparison, but this can also be done on Timestamp values.
Differential Revision: https://phab.mercurial-scm.org/D11631
dirstate-v2: Swap the order of size and mtime on disk
This makes the dirstate-v2 file format match dirstate-v1 for the order of
`mode`, `size`, and `mtime`. This order does not matter as long as these
components are handled through named fields/attributes in code, but in a few
places we still have tuples so having the same order everywhere might help
avoid a bug that might not be obvious since those components have the same type.
Differential Revision: https://phab.mercurial-scm.org/D11620
dirstate-v2: Document flags/mode/size/mtime fields of tree nodes
This file format modification was previously left incomplete because of
planned upcoming changes. Not all of these changes have been made yet,
but documenting what exists today will help talking more widely about it.
Differential Revision: https://phab.mercurial-scm.org/D11625
help: update help text for debug-repair-
issue6528
The changegroup fix was put in 5.9.1, this is now out of date. Alson, this can
maybe encourage people to upgrade?
Differential Revision: https://phab.mercurial-scm.org/D11392