view README.rst @ 50244:07d030b38097 stable

rust-dirstate-v2: don't write dirstate if data file has changed

This fixes the following race:
    - process A reads the dirstate
    - process B reads and writes the dirstate
    - process A writes the dirstate

This either resulted in losing what process B had just written or a crash
because the `uuid` had changed and we were trying to write to a file that
doesn't exist. More explanations inside.

This doesn't fix the issue for dirstate-v1, a later patch addresses it.

Mercurial
=========

Mercurial is a fast, easy to use, distributed revision control tool
for software developers.

Basic install::

 $ make            # see install targets
 $ make install    # do a system-wide install
 $ hg debuginstall # sanity-check setup
 $ hg              # see help

Running without installing::

 $ make local      # build for inplace usage
 $ ./hg --version  # should show the latest version

See https://mercurial-scm.org/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.

Notes for packagers
===================

Mercurial ships a copy of the python-zstandard sources. This is used to
provide support for zstd compression and decompression functionality. The
module is not intended to be replaced by the plain python-zstandard nor
is it intended to use a system zstd library. Patches can result in hard
to diagnose errors and are explicitly discouraged as unsupported
configuration.