checkexec: create destination directory if necessary
Since 460733327640, a "share" use the cache of the source repository. A side
effect is that no `.hg/cache` directory exists in the "share" anymore. As a
result, the checkexec logic can't use it to create its temporary file and have
to use the working copy for that.
This is suboptimal, it pollutes the working copy and prevents them to keep the
file around in cache. We do not want to use the cache directory for the share
target, it might be on a different file system.
So instead, we (try to) create the directory if it is missing. This is a
simple change that fixes the current behavior regression on stable.
On default, we should probably ensure the proper directories are created when
initializing the repository. We should also introduce a 'wcache' directory to
hold cache file related to the working copy. This would clarify the cache
situation regarding shares.
The tests catch a couple of other affected cases.
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.