revlog: refactor out the rev-oriented part of commonancestorheads We plan to use this in a function taking revs as argument. Round trips to nodes seem silly.

revlog: do inclusive descendant testing (API) In many other places, a revision is considered a descendant of itself. We update the behavior of `revlog.descendant()` to match this. (for example. `revlog.isancestor` does inclusive testing). No tests break, so it seems safe to do so. This will make it easier to use a more efficient implementation in a later changeset.

manifest: make cachesize a private attribute AFAICT this isn't accessed outside the class. It is a private attribute and its naming should reflect that. Differential Revision: https://phab.mercurial-scm.org/D3868

repository: document that file() return value conforms to interface Differential Revision: https://phab.mercurial-scm.org/D3867

cleanup: pass in overwrite flag to hg.updaterepo() as named argument For clarity.

histedit: use self.stateobj to check whether interrupted histedit exists self.stateobj is an instance of state.cmdstate() class which has an .exists() function which is used to check whether there exists an interrupted statefile or not. Differential Revision: https://phab.mercurial-scm.org/D3865

histedit: add a stateobj variable to histeditstate class The stateobj variable will be an instance of state.cmdstate() class. The stateobj variable will be used in upcoming patches to simplify the code a bit and start using cbor to write state files. Differential Revision: https://phab.mercurial-scm.org/D3864

histedit: factor out logic of processing state data in separate fn The new function will serve as the point from where we always get a dictionary of data stored in the statefile and will be helpful in integrating state.cmdstate.read() to write statefile in cbor. Differential Revision: https://phab.mercurial-scm.org/D3863

histedit: use hg.updaterepo() to avoid ui.{push|pop}buffer() hack In some parts of code, we call hg.update() and surround that with ui.pushbuffer() and ui.popbuffer() to suppress the output returned by hg.update(). We have hg.updaterepo() which does not writes to UI and can be used instead. Differential Revision: https://phab.mercurial-scm.org/D3862

scmutil: fix __enter__ in progress context manager Differential Revision: https://phab.mercurial-scm.org/D3861

httppeer: fix use of uninitialized variable with devel logging If the request fails, "res" was uninitialized. Differential Revision: https://phab.mercurial-scm.org/D3860

rebase: convert opts dict to bytes at once

rebase: isolate command options from internal flags I want to get rid of per-function byteskwargs(opts).

rebase: suppress warning thrown when aborting rebase in case of dryrun Before this patch dryrun output contained "rebase aborted" every time we run rebase in dryrun mode and this warning does not sound safe from a user prespective. Differential Revision: https://phab.mercurial-scm.org/D3857

rebase: no need to store backup in case of dryrun While aborting an unfinished rebase in case of dryrun there is no need to store backup for those rebased csets. Differential Revision: https://phab.mercurial-scm.org/D3827

rebase: split _origrebase() for conveniece in dryrun This patch split _origrebase() method by extracting rbsrt part from that to make it easy to implement dryrun in more elegant way than before. Differential Revision: https://phab.mercurial-scm.org/D3856

rebase: extract dryrun as a function To avoid more number of indented blocks and make it easier to add additional functionality in dryrun, extracted as a function. Differential Revision: https://phab.mercurial-scm.org/D3855

rebase: add lock to cover whole dryrun process Before this patch it is easy for another hg to interrupt the dryrun. This patch make sure that dryrun will complete without any interruption. Differential Revision: https://phab.mercurial-scm.org/D3854

merge: add a 'keepconflictparent' argument to graft Before this change, `merge.graft` was always dropping the "grafted" changeset from the parent. This is impractical in case of conflict as the second parent can be useful to help with conflict resolution. We add a new boolean parameter to control this behavior. This will make using `merge.graft` directly in shelve practicable. Differential Revision: https://phab.mercurial-scm.org/D3692

unlinkpath: make empty directory removal optional (issue5901) (issue5826) There are known cases where performing operations such as rebase from a directory that is newly created can fail or at least lead to being in a directory handle that no longer exists. This is even reproducible by just doing something as simple as: cd foo; hg rm * The behavior is different if you use `hg addremove`, the directory is not removed until we attempt to go back to the node after committing it: cd foo; rm *; hg addremove; hg ci -m'bye foo'; hg co .^; hg co tip Differential Revision: https://phab.mercurial-scm.org/D3859

py3: convert opts keys to bytes using pycompat.byteskwargs() This fixes the py3 build broken due to 56b2074114b19e12abd9cd4c378d58b702232705. Differential Revision: https://phab.mercurial-scm.org/D3853

procutil: add a shim for translating shell commands to native commands

revset: move lookup of first ancestor() candidate out of the loop

revset: leverage orset() to flatten ancestor() arguments This also makes orset() accept an empty argument because nullary ancestor() call is valid. That's not the case for orset(), but should be okay.

revset: remove orphan i18n comment from ancestor()

grep: deprecates `--all` flag As the name "all" is a misnomer for an option that searches on diffs of revisions, we are moving to diff flag from all, deprecating it in the process. Differential Revision: https://phab.mercurial-scm.org/D3825

namespaces: let namespaces override singlenode() definition Some namespaces have multiple nodes per name (meaning that their namemap() returns multiple nodes). One such namespace is the "topics" namespace (from the evolve repo). We also have our own internal namespace at Google (for review units) that has multiple nodes per name. These namespaces may not want to use the default "pick highest revnum" resolution that we currently use when resolving a name to a single node. As an example, they may decide that `hg co <name>` should check out a commit that's last in some sense even if an earlier commit had just been amended and thus had a higher revnum [1]. This patch gives the namespace the option to continue to return multiple nodes and to override how the best node is picked. Allowing namespaces to override that may also be useful as an optimization (it may be cheaper for the namespace to find just that node). I have been arguing (in D3715) for using all the nodes returned from namemap() when resolving the symbol to a revset, so e.g. `hg log -r stable` would resolve to *all* nodes on stable, not just the one with the highest revnum (except that I don't actually think we should change it for the branch namespace because of BC). Most people seem opposed to that. If we decide not to do it, I think we can deprecate the namemap() function in favor of the new singlenode() (I find it weird to have namespaces, like the branch namespace, where namemap() isn't nodemap()'s inverse). I therefore think this patch makes sense regardless of what we decide on that issue. [1] Actually, even the branch namespace would have wanted to override singlenode() if it had supported multiple nodes. That's because closes branch heads are mostly ignored, so "hg co default" will not check out the highest-revnum node if that's a closed head. Differential Revision: https://phab.mercurial-scm.org/D3852

rebase: refactor dryrun implementation This patch refactor dry-run code to make it easy to add additional functionality in dryrun. Otherwise we had to add every functionality through _origrebase() which does not seem a good implementation. Differential Revision: https://phab.mercurial-scm.org/D3849

hooks: allow Unix style environment variables on external Windows hooks This will help making common hooks between Windows and non-Windows platforms. Having to build the shellenviron dict here and in procutil.system() is a bit unfortunate, but the only other option is to fix up the command inside procutil.system(). It seems more important that the note about the hook being run reflects what is actually run. The patch from last summer added the hooks on the command line, but it looks like HG_ARGS has since learned about --config args, and the output was just confusing. Therefore, it's now loaded from a file in the histedit test for clarity.

windows: add a method to convert Unix style command lines to Windows style This started as a copy/paste of `os.path.expandvars()`, but limited to a given dictionary of variables, converting `foo = foo + bar` to `foo += bar`, and adding 'b' string prefixes. Then code was added to make sure that a value being substituted in wouldn't itself be expanded by cmd.exe. But that left inconsistent results between `$var1` and `%var1%` when its value was '%foo%'- since neither were touched, `$var1` wouldn't expand but `%var1%` would. So instead, this just converts the Unix style to Windows style (if the variable exists, because Windows will leave `%missing%` as-is), and lets cmd.exe do its thing. I then dropped the %% -> % conversion (because Windows doesn't do this), and added the ability to escape the '$' with '\'. The escape character is dropped, for consistency with shell handling. After everything seemed stable and working, running the whole test suite flagged a problem near the end of test-bookmarks.t:1069. The problem is cmd.exe won't pass empty variables to its child, so defined but empty variables are now skipped. I can't think of anything better, and it seems like a pre-existing violation of the documentation, which calls out that HG_OLDNODE is empty on bookmark creation. Future additions could potentially be replacing strong quotes with double quotes (cmd.exe doesn't know what to do with the former), escaping a double quote, and some tilde expansion via os.path.expanduser(). I've got some doubts about replacing the strong quotes in case sh.exe is run, but it seems like the right thing to do the vast majority of the time. The original form of this was discussed about a year ago[1]. [1] https://www.mercurial-scm.org/pipermail/mercurial-devel/2017-July/100735.html