Mercurial > hg
view tests/test-revisions.t @ 44143:7f86426fdd2c
rust-node: binary Node ID and conversion utilities
The choice of type makes sure that a `Node` has the exact
wanted size. We'll use a different type for prefixes.
Added dependency: hexadecimal conversion relies on the
`hex` crate.
The fact that sooner or later Mercurial is going to need
to change its hash sizes has been taken strongly in
consideration:
- the hash length is a constant, but that is not directly
exposed to callers. Changing the value of that constant
is the only thing to do to change the hash length (even
in unit tests)
- the code could be adapted to support several sizes of hashes,
if that turned out to be useful. To that effect, only the
size of a given `Node` is exposed in the public API.
- callers not involved in initial computation, I/O and FFI
are able to operate without a priori assumptions on the hash
size. The traits `FromHex` and `ToHex` have not been directly
implemented, so that the doc-comments explaining these
restrictions would stay really visible in `cargo doc`
Differential Revision: https://phab.mercurial-scm.org/D7788
author | Georges Racinet <georges.racinet@octobus.net> |
---|---|
date | Wed, 22 Jan 2020 16:37:05 +0100 |
parents | d916ed3ca951 |
children | 95c4cca641f6 |
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$ hg init repo $ cd repo $ echo 0 > a $ hg ci -qAm 0 $ for i in 5 8 14 43 167; do > hg up -q 0 > echo $i > a > hg ci -qm $i > done $ cat <<EOF >> .hg/hgrc > [alias] > l = log -T '{rev}:{shortest(node,1)}\n' > EOF $ hg l 5:00f 4:7ba5d 3:7ba57 2:72 1:9 0:b $ cat <<EOF >> .hg/hgrc > [experimental] > revisions.disambiguatewithin=not 4 > EOF $ hg l 5:00 4:7ba5d 3:7b 2:72 1:9 0:b 9 was unambiguous and still is $ hg l -r 9 1:9 7 was ambiguous and still is $ hg l -r 7 abort: 00changelog.i@7: ambiguous identifier! [255] 7b is no longer ambiguous $ hg l -r 7b 3:7b $ cd ..