sshpeer: add a configurable hint for the ssh error message Adding a possibility to configure error hint to be shown in the case of problems with SSH. Example of such hint can be "Please see http://company/internalwiki/ssh.html". Test Plan: - Ran hg pull with broken link and verified the output has no hint by default: ``` pulling from ssh://brokenrepository.com//repo remote: ssh: Could not resolve hostname brokenrepository.com: Name or service not known abort: no suitable response from remote hg! ``` - Run hg pull --config ui.ssherrorhint="Please see http://company/internalwiki/ssh.html": ``` pulling from ssh://brokenrepository.com//repo remote: ssh: Could not resolve hostname brokenrepository.com: Name or service not known abort: no suitable response from remote hg! (Please see http://company/internalwiki/ssh.html) ``` Differential Revision: https://phab.mercurial-scm.org/D1431

docs: add args/returns docs for some cmdutil, context, and registrar functions When writing my first extension, I found it hard to figure out these functions. I figured documenting their inputs/outputs would help future authors who are new to the codebase. Differential Revision: https://phab.mercurial-scm.org/D1440

commands: add value for cmdtype argument for read only commands In the previous release we added an argument `cmdtype` to registrar.command() which is a enum and tells whether the command is read only, recoverable write or unrecoverable write command. This patch add the value of cmdtype argument for commands which are read only. Differential Revision: https://phab.mercurial-scm.org/D1468

error: add InMemoryMergeConflictsError We'll raise this exception in the merge code, and in-memory users like rebase can catch it and retry without IMM. Differential Revision: https://phab.mercurial-scm.org/D1210

lfs: generate a large file by using `python` instead of yes | head yes(1) on some systems (like gcc112) feels compelled to inform you of broken pipes, such as those triggered by head(1). This works around the problem portably.

setup: add hgext.lfs to list of Python packages This is needed for lfs to get installed. Probably could stand to go into an earlier patch, but I just want to get this stuff pushed.

test-lfs: add tests demonstrating the interaction with largefiles Obviously the original series needs to be accepted first, but there are concerns about how well these extensions will play together before proceeding. It looks like the answer is surprisingly well. There are some merge surprises (largefiles seems to combine the choice of "keep tracking as a large/normal file" with taking the content of the large/normal file) and some existing diff weirdness (largefiles diffs the standins, not the large file). Converting the repo to normal files seemlessly transitions to lfs on the fly. I didn't test going the other way, because I'm not sure why anyone would want to do that. I flagged the lack of a repo requirement after converting, because some of the unsubmitted changes I have add a requirement on commit, but this somehow misses the convert case. I flagged an issue where devel-warnings are emitted on convert, which is a separate issue.

test-lfs: cast the flags printed to an int On Windows, the flag values in the subsequent tests were printing with a 'L' suffix.