checknlink: return False if .hgtmp file preexists (issue2517) If os_link fails on Windows, errno is always errno.EINVAL, so we can't really say if the testlink could not be created because (a) the FS doesn't support hardlinks or (b) there is a leaked .hgtmp file lying around from a previous crashed run. So let's err on the safe side, keep the code simple and assume we can't detect hardlinks in both cases.

localrepo: move string formatting out of gettext call

merge with stable

mq: ignore subrepos (issue2499) If MQ allows modifying .hgsub or .hgsubstate in a patch, it can easily lead to an inconsistent subrepo state. This patch prevents qrefresh from adding any modifications to .hgsub or .hgsubstate to a patch. The user is warned that these files are not included in the patch. The tests test both the slightly irrational and the pathological cases.

tests: integrate test-hardlinks-safety.t into test-hardlinks.t Should make running the testsuite a bit faster. Also, test-hardlinks.t and test-hardlinks-safety.t now have enough infrastructure in common.

mq: add an '-e/--exact' option to qpush This patch adds an '--exact/-e' option to qpush that will try to push the patches in the correct location in the DAG. Specifying this option does the following: * If --move is specified, abort. It makes no sense to move a patch to the front of the queue and try to apply it to its parent, because its parent is one of the patches we just moved it in front of! * If patches are already applied, abort. We don't want patch changesets scattered throughout the DAG. * If local changes are present, abort unless --force is used, as usual. * Find the first patch we're going to push (if we're pushing multiple patches with a target or --all). * If that patch doesn't have a parent, abort, obviously. * If the parent doesn't exist in the repo, abort. Something is wrong. * Update to the parent, then continue pushing the patches as normal.

dirstate: warn on invalid parents rather than aborting This allows more graceful recovery from some mangled dirstates

code style: prefer 'is' and 'is not' tests with singletons

polib: remove unnecessary comparisons with True Submitted to upstream repository as changeset f11e0b1b37b0.

subrepo: lazier git push logic Avoids calls to git push when the revision is already known to be in the remote repository. Now, when using a read-only git subrepo, git will never need to talk to its upstream repository.