py3: fix test-propertycache.py on Windows

commands: adjust metavariables as appropriate Apart from looking better in hg help command, these strings are also helpful when generating shell completions programmatically.

match: fix up a repr to not crash on Python 3 Differential Revision: https://phab.mercurial-scm.org/D5120

narrow: when widening, don't include manifests the client already has When widening, we already don't include the changelog (since f1844a10ee19) and files that the client already has (since c73c7653dfb9). However, we still include all manifests needed for the new narrowspec. When using flat manifests, that means we resend all the manifests even though the client necessarily has all of them. For tree manifests, we unnecessarily resend the root manifests and any subdirectory manifests that the client already has. This patch makes it so we no longer resend manifests that the client already has. It does so by passing an extra matcher to the changegroup packer and it uses that for filtering out directories matching the old matcher's visitdir(). For consistency between directories and files, it also makes the filtering of files look at both old and new matcher rather than passing in a diff matcher as we did before. Differential Revision: https://phab.mercurial-scm.org/D4895

tests: add test for widening from an empty clone Narrow clones that track no paths currently don't even include the root manifest (which is the only manifest when using flat manifests). That means that when we widen from such a clone, we need to make sure that we send the root manifest (and other manifests if using tree manifests). That currently works because we always resend all manifest that match the new narrowspec. However, we're about to stop resending manifests that the client already has and there's a risk of this breaking then, so let's add a test. Differential Revision: https://phab.mercurial-scm.org/D5143

subrepo: access status members by name instead of by position Taking my first Mercurial project closer to completion. Differential Revision: https://phab.mercurial-scm.org/D5144

revisions: when using prefixhexnode, ensure we prefix "0" Previously, if using `experimental.revisions.disambiguatewithin` (and it didn't include rev0), and '0' was the shortest identifier in that disambiguation set, we printed it as the shortest *without* a prefix. This was because we had logic to determine "if the prefix is a pure integer, but starts with 0, we don't need to prefix with 'x': 01 is not a synonym for revision #1", but didn't handle the case where prefix == 0 (which is a pure integer, and starts with 0... but it *is* "rev0"). Differential Revision: https://phab.mercurial-scm.org/D5113

store: pass matcher to store.datafiles() To get narrow stream clones working, we need a way to filter the storage files using a matcher. This patch adds matcher as an argument to store.walk() and store.datafiles() so that we can filter the files returned according to the matcher. Differential Revision: https://phab.mercurial-scm.org/D4850

streamclone: pass narrowing related info in _walkstreamfiles() This patch build a matcher using the include and exclude arguments we have in generatev2() and pass that matcher into _walkstreamfiles(). This will help us in filtering files we stream depending on the includes and excludes passed in by the user. Differential Revision: https://phab.mercurial-scm.org/D4851

streamclone: new server config and some API changes for narrow stream clones This patch introduces a new server config `experimental.server.stream-narrow-clones` which if set to True will advertise that the server supports narrow stream clones. This patch also pass on the includes and excludes from getbundle command to streamclone generation code. There is a test added to show that the includepats and excludepats are correctly passed. Upcoming patches will implement storage layer filtering for streamclones and then we can remove the temporary error and plug in the whole logic together to make narrow stream clones working. Differential Revision: https://phab.mercurial-scm.org/D5137