Summary:
Update `PhutilInteractiveEditor` to allow specifying a "task message" which will be displayed just prior to launching the user's editor.
Refs T3271
Test Plan: I ran several `arc diff` commands in varying states to invoke my editor and verified that it printed out the text indicating that my editor was being launched.
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Maniphest Tasks: T3271
Differential Revision: https://secure.phabricator.com/D21700
Summary:
After `arc diff` creates a revision in Phabricator it amends the commit to include a link to the revision in the commit message. For Mercurial this is done with `hg commit --amend --logfile` however this will fail when trying to create a diff for a non-head commit.
This updates `ArcanistMercurialAPI::amendCommit()` to allow amending a non-head commit in two ways, depending on whether `evolve` is in use:
No evolve:
1. Rebasing the current commit onto the current commit's parent, using the new commit message
2. Rebasing all children + descendants of the current commit onto the new resulting commit
3. Stripping the original commit
With evolve:
1. Amend the commit with `hg amend --logfile`
2. Run `hg evolve` to tidy up all commits
Test Plan:
I created 6 commits in a row placing a bookmark at commits 2 `bookmark1`, 4 `bookmark2`, and 6 `bookmark3`, and ensured I had `arc:bookmark` in my base ruleset.
No evolve, non-head changeset:
1. I verified I did not have `evolve` enabled by running `hg debugextensions` and did not see `evolve` in the listed active extensions.
2. I updated to `bookmark1` and modified a file to leave a dirty working state.
3. I ran `arc diff` and when prompted to amend my changes I said "yes", and verified a phab revision was created properly.
4. I checked the status of my repository and verified it was still linear and the bookmarks pointed to the proper commits.
5. I ran `hg log -r bookmark1 --template {desc}` to view the full commit message and verified it contained both `Summary: ...` and `Differential Revision: https://...`.
6. I ran `hg diff -c bookmark1` and verified the changes for that commit included the changes I made in step 2.
No evolve, head changeset:
1. I updated to `bookmark3` which is the head commit and modified a file to leave a dirty working state.
2. I ran `arc diff` and when prompted to amend my changes I said "yes", and verified a phab revision was created properly.
3. I checked the status of my repository and verified it was still linear and all the bookmarks pointed to the proper commits.
4. I ran `hg log -r bookmark3 --template {desc}` to view the full commit message and verified it contained both `Summary: ...` and `Differential Revision: https://...`.
5. I ran `hg diff -c bookmar3` and verified the changes for that commit included the changes I made in step 1.
With evolve:
1. I enabled `evolve` and verified it was enabled by running `hg debugextensions` and saw `evolve` in the listed active extensions.
2. I updated to `bookmark2` and modified a file to leave a dirty working state.
3. I ran `arc diff` and when prompted to amend my changes I said "yes", and verified a phab revision was created properly.
4. I checked the status of my repository and verified it was still linear and all the bookmarks pointed to the proper commits.
5. I ran `hg log -r bookmark2 --template {desc}` to view the full commit message and verfieid it contained both `Summary: ...` and `Differential Revision: https://...`.
6. I ran `hg diff -c bookmark2` and verified the changes for that commit included the changes I made in step 2.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin, epriestley
Differential Revision: https://secure.phabricator.com/D21686
Summary:
Refs T13546
**Behavior Changes**
1. Currently, after landing the `--onto` bookmark will not be advanced to the newly pushed commit(s)
- This updates so that after pushing commits upstream, onto-marker bookmarks are pulled back from the server to retrieve their updated state
2. Currently, after landing the working directory will typically be the old `--onto` commit
- This updates the behavior in the following ways
1. If the starting working state is a commit that is part of a revision being landed, the post-land state will be the newly published commit for that revision
2. If the starting working state is a commit for a tip revision being landed and there is only a single `--onto` target, the post-land state will be the newly published commit and the `--onto` bookmark will be activated, if applicable. If there are multiple `--onto` targets defined (uncommon) then the resulting working state will be the same behavior as before, as the desired behavior for this case is ambiguous.
3. If the starting working state is a commit that is not part of any revision being landed, then the post-land state will be that same commit, activating the same previous bookmark if applicable.
**Bugs Fixed**
1. When landing a diff that includes multiple commits, where the non-tip commit adds a file and later commit modifies that file, the land process would fail during rebasing.
2. When landing, the display of what commits are going to be landed only includes the commit hash but should include part of the commit message for easy identification.
3. If errors occur during a rebase while landing, the resulting state is an in-progress rebase. Users will typically not be able to resolve this in-progress rebase and possibly confuse them further as they have to first abort the rebase before trying to clean up. These rebases will now be aborted by arcanist before exiting.
4. If using evolve, landing a non-tip revision would leave behind orphaned commits.
Test Plan:
Bookmark test
- I created a diff with bookmark `test`, as a branch from before the `master` commit
- I updated working state to activate `test`
- I landed that diff
- I verified that the resulting working state was on the newly published `master` commit
Non-bookmark test
- I created a diff with bookmark `test`, as a branch from before the `master` commit
- I updated working state to be the new commit, but not activate `test` even though it points to that same commit
- I landed that diff
- I verified that the resulting working state was on the newly published `master` commit
Not-working state test
- I created a diff with bookmark `test`, as a branch from before the `master` commit
- I updated working state to an older commit not related to the one being landed
- I landed that diff
- I verified the ending resulting working state was on the older commit I was on prior to landing
Multiple commits test
- Using `test` bookmark I created a commit that added a new file, made a diff, made another new commit on top of it which modified that file, then updated the diff
- I updated my working state to the first commit for the diff (non-head)
- I ran `arc land test` to land the diff
- I verified that the resulting working state was on the newly published `master` commit
Landing while on `master`
- I created a diff with a bookmark `test`, as a branch from before the `master` commit
- I updated working state to the `master` bookmark
- I landed that diff
- I verified that the resulting working state was on the newly published `master` commit
Landing with no local `master` bookmark
- I created a diff consisting of two commits with bookmark `test`, as a branch from before the `master` commit
- I left working state on `test` and deleted my local `master` bookmark
- I landed that diff
- I verified that the resulting working state was on the newly published `master` commit and the `master` bookmark was pulled and active
Cascading diffs while on an earlier diff changeset
- I setup two diffs, each consisting of two commits, one depending on the other
- I put the working state onto a commit from the earlier diff
- I landed the later diff
- I verified that the resulting working state was on the newly published commit associated with the earlier diff, which is not the new `master` commit so there was no active bookmark
Cascading diffs while on the later diff changeset
- I setup two diffs, each consisting of two commits, one depending on the other
- I put the working state into a commit from the later diff
- I landed the later diff
- I verified that the resulting working state was on the newly published commit for the later diff which was `master` and `master` was active
Landing a non-tip revision, with evolve
- I setup three diffs, each consisting of two commits, creating a dependency chain
- I verified I had the evolve extension enabled via `hg debugextensions`
- I put the working state on a commit in the first revision
- I landed the second revision
- I verified that the resulting working state was clean, that revisions 1 and 2 were properly landed and published, and the resulting working state was on the published commit for the first revision.
Landing a non-tip revision, without evolve
- I setup three diffs, each consisting of two commits, creating a dependency chain
- I verified I did not have the evolve extension enabled via `hg debugextensions`
- I put the working state on a commit in the first revision
- I landed the second revision
- I verified that the resulting working state was clean, that revisions 1 and 2 were properly landed and published, and the resulting working state was on the published commit for the first revision.
Landing a non-tip revision, while the non-landing revision is active
- I setup three diffs, each consisting of two commits, creating a dependency chain
- I put the working state on the latest tip revision commit and its bookmark
- I landed the second revision
- I verified that revisions 1 and 2 were properly landed and published, and the resulting working state was still on the latest tip revision commit and its bookmark was active.
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin, epriestley
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21680
Summary:
Refs D21679 (phabricator changes)
This updates Arcanist to be able to check whether the version of Mercurial supports using `{p1.node}` template format vs. `{p1node}`.
Test Plan: Tested under coverage from D21679
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin, epriestley
Differential Revision: https://secure.phabricator.com/D21681
Summary:
When non-ascii characters appear in revision titles/summaries the `patch` and `diff` (to update) commands will fail on Windows systems. This often occurs due to “smart quotes” or "em—dash" characters being inserted into commit messages by editors on "user-friendly" operating systems like macOS.
This can be worked around by forcing all mercurial commands to use the global option `--encoding utf-8` which applies for any mercurial command. This option was [[ https://www.mercurial-scm.org/repo/hg/rev/a88e02081a88 | added in ~2006 ]] so this should work across all supported versions of mercurial.
Refs T13649
Test Plan:
I created a diff on a mercurial repository using smart quotes in the "Title" and "Summary" fields as well as in the content of a file being changed. Then on macOS, Windows (PowerShell), and Windows (cmd.exe) I was able to `patch` down the revision, make a modification, and `diff` the change back up to Phabricator, as well as `land` the change. I verified the commit and content looked correct on macOS as well as on Windows by using `nvim` which seems to properly detect and render the encoding, whereas mercurial displays the smart quotes and em-dashes with odd characters instead.
I did a grep through Arcanist codebase to find other places where `--encoding` might be specified for mercurial commands and could not find any. In the event that somehow this argument is added elsewhere I verified that multiple specifications of `--encoding utf-8` does not cause any issues and the later specification of `--encoding` appears to "win".
```lang=console
$ hg --encoding utf-8 --encoding utf-8 log -r tip
# prints out results in UTF-8 without issue
$ hg --encoding utf-8 log --encoding latin-1 -r tip
# prints out results in latin-1 without issue
```
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Maniphest Tasks: T13649
Differential Revision: https://secure.phabricator.com/D21676
Summary:
Ref T13649. Currently, "arc" may leave stdin nonblocking after showing a prompt. This can cause various odd behaviors down the line.
I can't immediately reproduce this behavior on macOS in "zsh" or "bash" (I'm unable to get stdin to remain nonblocking beyond the process lifespan), and also don't have pcntl locally so there's a fair amount of handwaving here.
Test Plan: This is somewhat speculative since I can't immediately reproduce the behavior. I tested the locally-reachable paths (no pcntl) but they're not interesting.
Maniphest Tasks: T13649
Differential Revision: https://secure.phabricator.com/D21666
Summary:
Ref T13562. Currently, "Filesystem::copyFile()" uses "copy", which doesn't work now that we no longer invoke "cmd.exe" by default.
Use "copy()" instead.
Note that this whole function is probably nonsense, but I'll follow up on T13562.
Test Plan:
- Created a standalone script which runs "Filesystem::copyFile()".
- Before: failed to copy any file.
- After: succesfully copied normal files.
- After: failed to copy a file over an existing directory with a reasonable error.
- After: failed to copy a file over itself with a reasonable error.
Maniphest Tasks: T13562
Differential Revision: https://secure.phabricator.com/D21643
Summary: See PHI2027. This example command is missing "--", but it's required.
Test Plan: Ran the new command, no longer got an error about "--".
Differential Revision: https://secure.phabricator.com/D21623
Summary: See PHI2022. This link is missing the `/u/` part and currently 404's.
Test Plan: Followed the new link, got documentation.
Differential Revision: https://secure.phabricator.com/D21611
Summary:
Ref T13635. PHP native JSON functions sometimes represent JSON objects as PHP "stdClass" objects.
Accept this representation and emit it correctly in "PhutilJSON".
Test Plan: Added a test, made it pass.
Maniphest Tasks: T13635
Differential Revision: https://secure.phabricator.com/D21604
Summary: The ".git/arc" directory may need to be created when writing to working copy configuration.
Test Plan:
- Tried to store an answer to a prompt in a new working copy.
- Before: error that ".git/arc" does not exist.
- After: prompt saved to working copy configuration.
Differential Revision: https://secure.phabricator.com/D21588
Summary:
Ref T13576. See that task for discussion.
When a user runs `arc land --pick A`, they may be selecting a range of commits ("X..Y") which have ancestors ("V..W") that should NOT land.
We must slice "X..Y" out of history before we can merge it, to avoid landing changes from "V..W".
When "X..Y" is simple and linear, we can rebase the range to pick our desired slice out of history.
When "X..Y" includes merge commits, we frequently can not, and I could not identify any simple alternative. The best alternative I came up with is this "reduce" operation:
- squash "into" onto Y, producing S, to guarantee there are no natural conflicts;
- squash S onto X^, producing T, to get rid of the merge commits;
- rebase T onto "into", producing R, to slice "X..Y" out of history;
- squash R onto "into", producing Q. (R and Q will be the same, but this simplies the code.)
This feels flimsy and fragile, but I can't immediately find a way to break it. See T13576 for more discussion.
Test Plan:
- Applied conflicting changes to `example.txt` in `master` and `feature1`.
- Ran `arc land`, got a merge conflict.
- Resolved the conflict with `git merge master`.
- Ran `arc land`.
- Before: merge conflict.
- After: `arc land` resolves the merge correctly.
- Stacked `feature2` on `feature1`, and made various mutations to `feature1` and `feature2`, then ran `arc land --pick feature2`. Changes made in `feature1` should not land, and they mostly do not. See T13576.
Maniphest Tasks: T13576
Differential Revision: https://secure.phabricator.com/D21590
Summary:
Ref T13576. The "implicit commits" prompt in "arc land" shows a list of implicit and non-implicit commits.
The implicit commits are marked with a background color, but this doesn't survive if you copy/paste the output into a support ticket.
Make my life easier by also marking commits so the marker survives copy/paste.
Test Plan: Ran "arc land" with implicit commits, saw a copy-pastable indicator.
Maniphest Tasks: T13576
Differential Revision: https://secure.phabricator.com/D21589
Summary:
Ref T13624. If we want to send PHP errors to a log, using the "error_log" configuration option catches the broadest set of errors across versions of PHP.
Configuring this disables errors on `stderr`, since they're sent to the log instead. We'd like them to go to both places; provide a simple wrapper for this. Also do a bit of writability testing.
Test Plan: Wrote errors to a new log, see followup changes.
Maniphest Tasks: T13624
Differential Revision: https://secure.phabricator.com/D21578
Summary: Ref T13608. Ref T13100. Ref T13586. Properly checking "preg_match()" and similar calls for failure and raising useful exceptions is complicated and error-prone. Provide wrapper functions with an API that's more consistent with the rest of the codebase: matches are returned; and errors raise detailed exceptions.
Test Plan: See next change.
Maniphest Tasks: T13608, T13586, T13100
Differential Revision: https://secure.phabricator.com/D21561
Summary:
These are the instructions from https://github.com/golang/lint.
The fetch location changed to `golang.org/x/lint/golint` from `github.com/golang/lint/golint`.
`-u` tells go to update the package and its deps if they exist.
`-u` Shouldn't strictly be necessary, but figured we might as well follow the instructions from `golint`.
Test Plan:
Enable golint without having it installed.
Ensure that the install instructions now show the new location.
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D21552
Summary:
Ref T13588. For consistency of behavior between versions on either side of PHP7, any "catch (Exception)" block should generally have a "catch (Throwable)" block in the same catch list.
Raise a lint warning when "Exception" is caught without also catching "Throwable", since this is almost certainly not desired.
Test Plan: Added tests.
Maniphest Tasks: T13588
Differential Revision: https://secure.phabricator.com/D21542
Summary: Ref T13588. See D21500. This syntax is unusual and there are some hidden complexities involved; annotate them. See D21500 for more discussion.
Test Plan: Read text, reviewed D21500.
Maniphest Tasks: T13588
Differential Revision: https://secure.phabricator.com/D21541
Summary:
Ref T13588. Marking a method "final private" has never been meaningful, and is an error in PHP8.
Add static analysis to detect (and correct) this issue.
Test Plan: Added unit tests, will lint "phabricator/".
Maniphest Tasks: T13588
Differential Revision: https://secure.phabricator.com/D21539
Summary: Ref T13598. This builds on D21537 and adds support for correcting the capitalization of builtin systems.
Test Plan:
- Linted a file that uses "ExCePtIoN", got a lint correction.
Maniphest Tasks: T13598
Differential Revision: https://secure.phabricator.com/D21538
Summary:
Ref T13598. If you spell a symbol like "Polygon" as "PoLyGoN", you currently get an "unknown symbol" lint message. However, provided "Polygon" is a valid symbol, we can unambiguously correct the spelling of the symbol.
Note that this patch can only correct the spelling of application symbols, not builtin symbols (since none of the library maps contain builtin symbols).
Test Plan: {F8374599}
Maniphest Tasks: T13598
Differential Revision: https://secure.phabricator.com/D21537
Summary: Ref T13589. See that task for discussion.
Test Plan:
- Created this diff, ran most commands in isolation.
- This change is difficult to test extensively.
Maniphest Tasks: T13589
Differential Revision: https://secure.phabricator.com/D21509
Summary:
Since 2.1.0 (commit 75bc0c03c145), pyflakes has included the Python
version and platform in its version output, so ignore it if present.
Since 2.2.0 (commit 6ba3f8e0b59b), pyflakes has included the column
number in its messages, so update the parser to include it and drop the
column number from the (only) test in order to work with both old and
new versions. Whilst here, assign names to the capture groups to make
the code clearer.
Test Plan: Ran arc unit
Reviewers: epriestley, joshuaspence, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D21504
Summary:
Recent JSHint improves the warning and attributes it to the equals sign
rather than the end of the expression (changed in 897e0359ce19, first
released in 2.11.0-rc1).
Test Plan: Ran arc unit with JSHint 2.12.0
Reviewers: epriestley, joshuaspence, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D21503
Summary:
PHP 8 deprecates openssl_free_key as the key is automatically freed, so
silence the warning in PhutilOAuth1Future::signString.
Test Plan: Ran arc lint --everything
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Maniphest Tasks: T13588
Differential Revision: https://secure.phabricator.com/D21502
Summary:
In PHP 8 passing an invalid encoding to mb_convert_encoding raises a
ValueError (which extends Error not Exception), so fix the test to also
catch Throwable (but leave the explicit Exception case for PHP 5, which
lacks Throwable).
Test Plan: Ran arc unit --everything
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Maniphest Tasks: T13588
Differential Revision: https://secure.phabricator.com/D21501
Summary:
Calling 'Foo::bar' is only supported since PHP 7, whereas the array form
is supported since PHP 5.4, which is below our PHP 5.5 baseline.
Test Plan: No regressions under PHP 8 and snippet tested on 3v4l
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D21505
Summary:
PHP 8's sprintf raises a ValueError when encountering unknown format
specifiers (previously it would eat the argument and print nothing), so
linting format strings like %Ls dies with an uncaught ValueError.
Fix this by using a custom callback during linting to turn all format
specifiers into %s and replace the dummy null argument with the original
format specifier, ensuring we always end up providing valid input to the
sprintf at the end. This has the nice property that the output of the
call to xsprintf is the original format string, though any
transformation into valid input would do.
Test Plan: Ran arc lint
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Maniphest Tasks: T13588
Differential Revision: https://secure.phabricator.com/D21500
Summary:
In previous versions, passing the wrong type to preg_match would give a
warning that could be suppressed by @ and caught by set_error_handler,
but as of PHP 8 this raises a TypeError and so remains uncaught. Thus
check up-front whether the provided value is a string.
This fixes linting arc itself when run with PHP 8, as includes and
excludes use "optional regex | list<regex>", so would previously try to
pass an array to preg_match for the first alternative and die.
Test Plan: Ran arc lint
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Maniphest Tasks: T13588
Differential Revision: https://secure.phabricator.com/D21499
Summary:
PHP 7.2.0 deprecated the 5th parameter and PHP 8 removed it, so stop
using it and provide a default value to avoid erroring with:
```
Too few arguments to function PhutilErrorHandler::handleError(), 4 passed and exactly 5 expected
```
Test Plan: Used to create this revision with PHP 8 on macOS
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Maniphest Tasks: T13588
Differential Revision: https://secure.phabricator.com/D21498
Summary:
This combination does not make sense and PHP 8 errors with:
```
Private methods cannot be final as they are never overridden by other classes
```
Thus remove the redundant final from all such functions.
Test Plan: Used to create this revision with PHP 8 on macOS
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D21496
Summary:
See <https://discourse.phabricator-community.org/t/search-by-name-in-files-doesnt-support-number/4300>.
I can't exactly reproduce the original issue, but when a query like "quack 1234" is tokenized, we end up calling "phutil_utf8v(1234)", where the argument is an integer.
At least in recent versions of PHP, this fatals ("trying to access an offset of an integer"). Cast the argument first.
Test Plan: Searched for "quack 1234" in Files. Before: fatal accessing offset of integer; after: correct results.
Differential Revision: https://secure.phabricator.com/D21477
Summary: Fix tests to work with rubocop 0.92.0 released on September 25, 2020
Test Plan: Unit tests pass
Reviewers: #blessed_reviewers, epriestley
Reviewed By: #blessed_reviewers, epriestley
Subscribers: Korvin, epriestley
Differential Revision: https://secure.phabricator.com/D21474
Summary:
We are having issues where people run out of file descriptors and the first `git push` will succeed, but the
second one will not. We'd like the diff to not be created in this case as it leads to weird behavior like our tests
running against 0 changed files.
Test Plan: none
Reviewers: epriestley, #blessed_reviewers
Reviewed By: epriestley, #blessed_reviewers
Subscribers: Korvin
Differential Revision: https://secure.phabricator.com/D21471
Summary:
See PHI1862. This code calls "execute()" on the future directly, but that skips some steps -- notably, ServiceProfiler hooks.
Call "resolve()", which has the same effect but includes desirable/expected side effects.
Test Plan: Changed a workflow to run "phutil_passthru('ls')", ran it with "--trace". Before: no execution in trace; after: execution in trace.
Differential Revision: https://secure.phabricator.com/D21470
Summary: Ref T13582. When this code is reached with a raw HTTP exception, it currently fatals.
Test Plan:
- Ran `arc branches --conduit-uri=http://example.org` (a bad Conduit URI).
- Before: hard fatal with a bad method call.
- After: non-Conduit exception raised to user. Not ideal, but a step forward.
Maniphest Tasks: T13582
Differential Revision: https://secure.phabricator.com/D21467
Summary:
See T13572. FutureIterator does not release futures, so long-lived iterators (like the one that FuturePool may build) can end up leaking memory.
This affects the FuturePool used by the daemon overseer.
See T13572 for more discussion.
Test Plan:
- Ran the simple FutureIterator script from T13572. Before: memory held during iteration, script grows without bound. After: memory released, script uses stable memory.
- Ran the overseer with memory logging and an immediate wakeup from hibernation. Before: saw memory usage grow without bound at a rate of ~300MB/day. After: saw memory usage stable.
Differential Revision: https://secure.phabricator.com/D21466
Summary: Ref T13581. This message can be slightly more helpful in some cases by showing which method call failed.
Test Plan: Ran `arc branches` under the error condition in D21462, got a more useful error.
Maniphest Tasks: T13581
Differential Revision: https://secure.phabricator.com/D21463
Summary:
Ref T13577. After the lint rule fix in D21453, it can identify more errors. Fix the errors it identifies in "arcanist/".
These all seem fairly obscure/benign.
Test Plan: Ran `arc lint` on the files before and after these changes. Did not specifically re-test these particular messages, but they mostly very obscure.
Maniphest Tasks: T13577
Differential Revision: https://secure.phabricator.com/D21456
Summary:
Ref T13577. I'd like to `arc lint --everything` to find other bad calls to `pht()` and similar functions, but `n_HEREDOC` nodes currently can not generate a response to "getStringLiteralValue()".
Support literal extraction from heredocs.
Test Plan: Added a test, made it pass. Will lint everything.
Maniphest Tasks: T13577
Differential Revision: https://secure.phabricator.com/D21455
Summary: Ref T13577. This call is missing a parameter. After D21453, this is detected properly by lint. Provide the parameter.
Test Plan: Ran `arc lint` on HTTPSFuture before and after the change.
Maniphest Tasks: T13577
Differential Revision: https://secure.phabricator.com/D21454
Summary:
Ref T13577. This lint rule correctly detects the error in `pht('x %s y')` but the narrow test for `n_STRING_SCALAR` prevents it from detecting the error in `pht('x %s y'.'z')`.
Make the test broader.
Test Plan:
- Ran `arc lint` on `HTTPSFuture.php`, got a detection of the issue in T13577.
- Added a failing test and made it pass.
Maniphest Tasks: T13577
Differential Revision: https://secure.phabricator.com/D21453
Summary:
Ref T13555. Currently:
- If an exception is raised in "start()", the exception state is not set on the future.
- Futures do not always call "startFuture()" before starting, and do not always call "endFuture()" once they become resolvable.
- If you start an ExecFuture which immediately fails and then call "getPID()" on it, you get an unclear exception.
Simplify these behaviors:
- In FutureIterator, only start futures which have not already started.
- When starting a future on any pathway, run start code.
- When a future becomes resolvable on any pathway, run end code.
- Raise a more clear exception when calling "getPID()" on a future with no subprocess.
Test Plan: Faked a failing subprocess with "$proc = null", ran "bin/phd debug taskmaster" etc. Got clearer errors and more consistent future lifecycle workflows.
Maniphest Tasks: T13555
Differential Revision: https://secure.phabricator.com/D21423
Summary:
See PHI1808. Currently, "arc land <some bookmark>" does not destroy the bookmark in Mercurial. There are three issues here:
- "hg rebase --keep --collapse" moves bookmarks to the rewritten commits;
- "hg strip" moves bookmarks backwards;
- "hg prune" moves bookmarks backwards.
To get around "hg rebase", save and restore bookmark state.
To get around "hg strip" and "hg prune", explicitly destroy bookmarks pointing at commits before we strip/prune those commits.
Test Plan:
- Ran "arc land <some bookmark> --trace". Saw arc reset the bookmark position after rebasing, and destroy the bookmark explicitly before stripping.
- When the workflow exited, saw no more bookmark (previously: bookmark existed and pointed at a possibly-intermediate state).
Differential Revision: https://secure.phabricator.com/D21397
Summary:
Ref PHI1808. In Mercurial, we must save and restore bookmark state explicitly.
- Save and restore bookmarks.
- Clean up concepts in "arc-ls-markers" slightly, so we don't need separate "isCurrent" and "isActive" flags, hopefully.
I believe the totality of Mercurial state is:
- A (non-bare) working copy points at exactly one commit (which might be the empty/null commit, in an empty repository).
- A working copy has exactly one active branch.
- Each branch has zero or more heads.
- Each head may be closed.
- Each (non-null) commit belongs to exactly one branch.
- Note that the active branch may have zero heads and zero commits which belong to it!
- A working copy has zero or one active bookmark.
To capture this, we now emit:
- A list of branch heads. If a branch head is a working copy commit, that head is flagged as active.
- A list of bookmarks. If a bookmark is the current bookmark, that bookmark is flagged as active.
- A single "branch-state" virtual marker. This covers the case where you have run "hg branch X" to create X, but no objects in the working copy actually correspond to X yet. It also covers the case where you are on a concrete branch, but not any head of that branch.
- A single "commit-state" virtual marker. This always shows the current commit in the working copy.
Test Plan:
- Useful states to test are:
- Empty repository (not all commands currently work here).
- Normal repository, on a bookmark.
- Normal repository, no bookmark.
- "hg up 123" to update to somewhere in history.
- "hg branch X", to start a new branch with no commits.
- Ran "arc branches" and "arc bookmarks" in various states. Saw generally sensible output.
- Ran "arc land --hold ..." in various states against a failing remote. Saw generally sensible output, and saw working properly restored to the original state.
Differential Revision: https://secure.phabricator.com/D21396
Summary: Ref PHI1808. Currently, push failures are messaged awkwardly. Make this exception handling more selective and the user-facing behavior more readable.
Test Plan: Ran "arc land" against a failing remote, saw a human-readable message instead of a stack trace.
Differential Revision: https://secure.phabricator.com/D21395
Summary: See PHI1808. Some refactoring of the "passthru" API resulted in error conditinos here being dropped. Instead, raise them as exceptions.
Test Plan: Forced "hg push" to fail, used "arc land" against a failed push, saw error behavior instead of "success" feedback.
Differential Revision: https://secure.phabricator.com/D21394
Summary:
Ref PHI1805. Under some combination of versions (Python 3.8?), "arc-ls-markers" is running into additional Python runtime issues.
Sprinkle more "b" around to resolve them? Also clean up a couple of plain "arc" issues.
Test Plan:
Landed a change in Mercurial.
Some of this works fine without changes in Python 3.7/2.7 against Mercurial 4.7/5.4, so this may not be exhaustive.
Differential Revision: https://secure.phabricator.com/D21393
Summary: See PHI1805. This call is constructed improperly and can lead to a fatal in `arc patch` under Mercurial.
Test Plan: In Mercurial, ran a valid `arc patch` operation.
Differential Revision: https://secure.phabricator.com/D21391
Summary:
Ref T13546. Try using unicode box drawing characters to render a more obvious tree struture in "arc branches".
Unclear if this has enough support to use, but seems okay so far.
Test Plan: Ran "arc branches", saw a nicer tree display.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21390
Summary:
Correct two minor Conduit future issues:
- FutureAgent shows up in the trace log as "<mystery>". Since it isn't doing anything useful, solve the mystery and drop it from the log.
- Simply the ConduitFuture code for interacting with the service profiler now that a more structured integration is available.
Test Plan: Ran "arc branches --trace", saw conduit calls and no more "<mystery>" clutter.
Differential Revision: https://secure.phabricator.com/D21388
Summary:
See PHI1802. After D21384, "arc land" and similar with no credentials now properly raise a useful exception, but it isn't formatted readably.
Update the display code to make it look prettier.
Test Plan: Ran "arc land" with no and invalid credentials, got properly formatted output.
Differential Revision: https://secure.phabricator.com/D21387
Summary:
Currently, modern "arc" workflows accept and parse "--anonymous" but don't do anything with it.
I intend to move away from anonymous workflows, which only really supported a tiny subset of unusual workflows on open source installs but added significant complexity to login/auth behavior.
Drop support for this flag.
Test Plan: Grepped for "anonymous", didn't turn up any relevant hits.
Differential Revision: https://secure.phabricator.com/D21386
Summary:
Currently, if you type "arc upload <tab>", we do not autocomplete the working directory. We should, but the "current argument" is the empty string and that's technically a prefix of every flag, so we suggest that you might want a flag instead.
You probably don't. Suggest paths in this case.
Test Plan:
- Ran "arc upload <tab>", saw path completions.
- Ran "arc land <tab>" (this workflow does NOT take paths as arguments), saw flag completions.
Differential Revision: https://secure.phabricator.com/D21385
Summary:
See PHI1802. Currently, we can't raise a "you must login" error in a generic way at the beginning of a workflow because we don't know if a workflow needs credentials or not.
For example, "arc help" does not need credentials but "arc diff" does.
Additionally, some actual Conduit calls do not need credentials ("conduit.ping", "conduit.getcapabilities") and others do.
Although I'd like to simplify this eventually and move away from anonymous/unauthenticated "arc", this isn't trivial today. It's also possible for third-party code to add authenticated calls to "arc help", etc., so even if we could execute these tests upfront it's not obvious we'd want to.
So, for now, we raise "you must login" at runtime, when we receive an authentication error from Conduit.
This got implemented for Toolsets in a well-intentioned but not-so-great way somewhere in wilds/experimental, with an "ArcanistConduitCall" that behaves a bit like a future but is not really a future. This implementation made more sense when ConduitEngine was serving as a future engine, and FutureProxy could not rewrite exceptions.
After the Toolsets code was first written, ConduitEngine has stopped serving as a future engine (this is now in "HardpointEngine"). Since HardpointEngine needs a real future, this "show the user a login message" code gets bypassed. This results in user-visible raw authentication exceptions on some workflows:
```
[2020-06-30 21:39:53] EXCEPTION: (ConduitClientException) ERR-INVALID-SESSION: Session key is not present. at [<arcanist>/src/conduit/ConduitFuture.php:76]
```
To fix this:
- Allow FutureProxy to rewrite exceptions (see D21383).
- Implement "ArcanistConduitCall" as a FutureProxy, not a future-like object.
- Collapse the mixed-mode future/not-quite-a-future APIs into a single "real future" API.
Test Plan:
- Created a paste with "echo hi | arc paste --".
- Uploaded a file with "arc upload".
- Called a raw method with "echo {} | arc call-conduit conduit.ping --".
- Invoked hardpoint behavior with "arc branches".
- Grepped for calls to either "resolveCall()" method, found none.
- Grepped for calls to "newCall()", found none.
- Grepped for "ArcanistConduitCall", found no references.
Then:
- Removed my "~/.arcrc", ran "arc land", got a sensible and human-readable (but currently ugly) exception instead of a raw authentication stack trace.
Differential Revision: https://secure.phabricator.com/D21384
Summary:
See PHI1764. See PHI1802. Address two resolution behaviors for FutureProxy:
- FutureProxy may throw an exception directly from iteration via "FutureIterator" (see PHI1764). This is wrong: futures should throw only when resolved.
- FutureProxy can not change an exception into a result, or a result into an exception, or an exception into a different exception. Being able to proxy the full range of result and exception behavior is useful, particularly for Conduit (see PHI1802).
Make "FutureProxy" more robust in how it handles exceptions from proxied futures.
Test Plan:
Used this script to raise an exception during result processing:
```
<?php
require_once 'support/init/init-script.php';
final class ThrowingFutureProxy
extends FutureProxy {
protected function didReceiveResult($result) {
throw new Exception('!');
}
}
$future = new ImmediateFuture('quack');
$proxy = new ThrowingFutureProxy($future);
$iterator = new FutureIterator(array($proxy));
foreach ($iterator as $resolved) {
try {
$resolved->resolve();
} catch (Exception $ex) {
echo "Caught exception properly on resolution.\n";
}
}
```
Before this change, the exception is raised in the `foreach()` loop. After this change, the exception is raised at resolution time.
Differential Revision: https://secure.phabricator.com/D21383
Summary: This method is private and has no callers. The code has moved to "FileUploader" in a prior change.
Test Plan: Grepped for callers, found none.
Differential Revision: https://secure.phabricator.com/D21382
Summary: Ref T13546. Fixes some issues where marker selection in Mercurial didn't work, and selects "draft()" as the set of commits to show, which is at least somewhat reasonable.
Test Plan: Ran "arc branches" and "arc bookmarks" in Mercurial, got more reasonable output.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21380
Summary: Ref T13546. Allow the commit graph to be queried by date range, and Git to be queried for multiple disjoint commits.
Test Plan: Ran "arc branches" and future code which searches for alternate commit ranges for revisions.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21379
Summary: Ref T13546. If your history includes a long linear sequence of published revisions, summarize them.
Test Plan: Ran "arc branches", saw better summarization of linear published revision sequences.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21367
Summary: Ref T13546. In cases where a given set has a large number of commits, summarize them in the output.
Test Plan: Ran "arc branches", saw long lists of commits (like the history of "stable" summarized).
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21366
Summary: Ref T13546. Make "arc branches" use a flexible grid width and try to match the content to the display width in a reasonable way.
Test Plan: Ran "arc branches" at various terminal widths, got generally sensible output.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21365
Summary: Ref T13546. This is no longer necessary after the introduction of "msortv_natural()", which can handle natural string sorting.
Test Plan: Ran "arc branches", saw the same sorting applied.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21364
Summary:
Ref T13546. Currently, each "land" workflow executes custom graph queries to find commits: move toward abstracting this logic.
The "land" workflow also has a potentially dangerous behavior: if you have "master > A > B > C" and "arc land C", it will land A, B, and C. However, an updated version of A or B may exist elsewhere in the working copy. If it does, "arc land" will incorrectly land an out-of-date set of changes.
To find newer versions of "A" and "B", we need to search backwards from all local markers to the nearest outgoing marker, then compare the sets of changes we find to the sets of changes selected by "arc land".
This is also roughly the workflow that "arc branches", etc., need to show local markers as a tree, and starting in "arc branches" allows the process to be visualized.
As implemented here ,this rendering is still somewhat rough, and the selection of "outgoing markers" isn't good. In Mercurial, we may plausibly be able to use phase markers, but in Git we likely can't guess the right behavior automatically and probably need additional configuration.
Test Plan: Ran "arc branches" and "arc bookmarks" in Git and Mercurial.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21363
Summary:
Ref T13546. When running "arc branches", we want to show all unpublished commits. This is often a different set of commits than "commits not present in any remote".
Attempt to identify published commits by using the permanent ref rules in Phabricator.
Test Plan: Ran "arc look published", saw sensible published commits in Git.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21378
Summary:
Ref T13546. Query and associate known Phabricator repositories to working copy remotes by normalizing and comparing URIs.
This primarily gives us access to "permanentRefRules" so we can tell which branches have published changes.
Test Plan: Ran "arc look remotes" in Git and Mercurial working copies, saw repositories map properly.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21377
Summary:
Ref T13546. Currently, "arc which" provides some amount of inspection but it generally isn't very helpful to users and is too limited and inflexible. "arc inspect" is an internal/debugging workflow.
The new "arc look" is much more aggressively unhelpful.
Test Plan: I'm not sure if this command should allow you to continue at night, because it's too dark.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21376
Summary: Ref T13546. Allow construction of remote refs in Git; previously they were only supported in Mercurial.
Test Plan: Ran "arc inspect remote(origin)" in Git, got a ref.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21375
Summary: Ref T13546. Expose remote refs for inspection via "arc inspect". For now, this only works in Mercurial.
Test Plan: Ran "arc inspect remote(default)" in Mercurial, got a ref out.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21374
Summary: Ref T13546. Move toward smarter remote repository lookup by providing URI normalization code in Arcanist. This diff duplicates code from Phabricator; the next change will collapse it.
Test Plan: Ran unit tests.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21372
Summary:
Ref T13546. Pull some small utility changes out of the deeper stack of "land/markers" changes.
"phutil_partition()" makes it easier to write code that loops over a list grouping elements, then acts on each group. This kind of code is not terribly common, but often feels awkward when implemented with raw primitives.
"msortv()" can support "natural" sorting, which sorts "feature1", "feature2", ..., "feature10" in a more human-readable order.
Test Plan: Ran unit tests, used new behaviors elsewhere in "arc markers" workflows.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21371
Summary:
Ref T13546. In a future change, I'm providing a fancier version of "arc branches" that requires more sophisticated table rendering.
Implement a new view which can do some fancier things, like handle alignment of multi-line table cells.
Test Plan: See future changes.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21360
Summary: Ref T13546. The old "differential.query" call is still used to fill refs when all we have locally is hashes. Add some mappings to improve the resulting refs.
Test Plan: Viewed "arc branches", saw statuses colored more consistently.
Reviewers: ptarjan
Reviewed By: ptarjan
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21355
Summary: Ref T13546. If "arc land" would create a branch, warn the user before it does.
Test Plan: Ran "arc land --onto mtarse", a typo of "master".
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21354
Summary: Ref T13546. All of LandEngine, LocalState, and RepositoryAPI implement "getDisplayHash()". Always use the RepositoryAPI implementation.
Test Plan: Grepped for symbols.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21353
Summary:
Ref T13546. Show ongoing and failed builds more clearly in "arc land" output.
Also rename "DisplayRef" (which is not a "Ref") to "RefView" with the goal of improving clarity, and let callers "build...()" it so they can add more status, etc., information.
Get rid of "[DisplayRef|RefView]Interface". In theory, future refs (say, in Phabricator) might not do anything here, but every Ref just ends up implementing it. This could perhaps be subclassed more narrowly in the future if necessary.
Test Plan: Ran "arc land", grepped for various symbols.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21352
Summary:
See PHI1782. If a linter raises a message at a line which does not exist in the file, render a confused warning rather than fataling.
This is a long-existing issue which was exacerbated by D21044.
Test Plan: Modified a linter to raise issues at line 99999. Before change: fatal in console rendering. After change: reasonable rendering.
Differential Revision: https://secure.phabricator.com/D21357
Summary:
Ref T13546. Ref T9948.
- Make "--hold" show the same set of commands to manually push that the normal workflow would use.
- Make save/restore state work.
- Make bookmark creation prompt for confirmation.
- Improve / provide some additional warnings and help text.
Test Plan: Ran various increasingly complex "arc land" workflows, e.g. "arc land --hold --onto fauxmark1 --onto fauxmark2 --into default . --revision 118 --trace"
Maniphest Tasks: T13546, T9948
Differential Revision: https://secure.phabricator.com/D21351
Summary: Ref T9948. Ref T13546. Clean up some minor behaviors to allow "arc land" to function in the simplest cases again. Also, do a capability test for "prune" rather than just falling back.
Test Plan: Ran "arc land <mark>" in Mercurial, got changes pushed.
Maniphest Tasks: T13546, T9948
Differential Revision: https://secure.phabricator.com/D21350
Summary:
Ref T9948. Ref T13546. This change moves toward a functional "arc land" in Mercurial.
Because of how "bundlerepo.getremotechanges()" works, "hg arc-ls-markers" does not actually list markers in the remote that aren't different from local markers so it's hard to get anywhere with this.
Test Plan: Got somewhat-encouraging output from "arc land" and "hg arc-ls-markers", but too many things are still broken for this to really work yet.
Maniphest Tasks: T13546, T9948
Differential Revision: https://secure.phabricator.com/D21348
Summary: Ref T13546. In the new "arc land": actually reach build warnings; and show buildable URIs.
Test Plan: Ran "arc land ..." with intentionally broken builds, got more useful build warnings.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21347
Summary: Ref T13546. The modern constant from the modern API method for this state is "published", and this more narrowly covers the desired behavior (notably, excluding "Abandoned" revisions).
Test Plan: Ran "arc land ... --revision X" where "X" is a published revision, got an appropriate prompt.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21345
Summary:
Ref T9948. Ref T13546. We must passthru "hg ls-remote" because it might prompt the user for credentials.
Since "ls-remote" is implemented as an exension and we can't rely on using stdout beacuse of passthru, the actual command we execute is:
```
$ hg --config extensions.arc-hg=<huge long path to extension> arc-ls-remote --output <huge long path to temporary file> -- remote
```
This is meaningless and distracting; show the intent of the command we're executing instead. Users can see the raw command in "--trace" if they're actually debugging behavior.
Test Plan: Ran "arc land" in a Mercurial repository, got a tidier command output.
Maniphest Tasks: T13546, T9948
Differential Revision: https://secure.phabricator.com/D21344
Summary: Ref T13546. Ref T9948. It seems challenging to examine a remote in vanilla Mercurial. Provide an "hg arc-ls-remote" command which functions like "git ls-remote" so we can figure out if "--into X" is a bookmark, branch, both, neither, or a branch with multiple heads without mutating the working copy as a side effect.
Test Plan: Ran various "arc land --into ..." commands in a Mercurial working copy, saw apparently-sensible resolution of remote marker names.
Maniphest Tasks: T13546, T9948
Differential Revision: https://secure.phabricator.com/D21343
Summary: Ref T13546. Parse "hg paths" and validate that the remotes "arc land" plans to interact with actually exist.
Test Plan: Ran "arc land" with good and bad "--into-remote" and "--onto-remote" arguments, got sensible validation behavior.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21342
Summary:
Ref T13546. If the "onto" branch doesn't exist yet and has a "/" in it, we need to preface it with "refs/heads" explicitly.
Fix a "false/null" issue with argument validation.
Possibly, "arc land" should prompt you before creating branches in the remote.
Test Plan: Ran "arc land --onto does-not-exist/1.1" and created a branch.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21341
Summary:
Ref T13546. If you have "feature1", "feature2", etc., "arc land feature4" will now land the entire sequence.
Provide "arc land --pick feature4" to work more like the old "arc land" did. This cherry-picks the commits associated with "feature4", then cascades onto the ancestor of the range.
Test Plan: Ran "arc land --pick land14" to pick a change out of a stack.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21340
Summary:
Ref T13546. When we encounter a merge conflict, suggest "--incremental" if it's likely to help.
When merging multiple changes, rebase ranges before merging them. This reduces conflicts when landing sequences of changes.
Test Plan: Ran "arc land" to land multiple changes. Hit better merge conflict messaging, then survived merge conflicts entirely.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21339
Summary: Ref T13546. Moves away from the older workflows in favor of "arc branches", "arc bookmarks", and "arc work".
Test Plan: Grepped for affected symbols, didn't find any callers.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21337
Summary: Ref T13546. Fixes T2928. Adds a new "arc work" workflow which functions like the older "arc feature" workflow, but with modern infrastructure.
Test Plan: Used "arc work" to begin work on branches, bookmarks, and revisions in Git and Mercurial.
Maniphest Tasks: T13546, T2928
Differential Revision: https://secure.phabricator.com/D21336
Summary: Ref T13546. Update the Mercurial code which finds default targets and maps symbols to targets under "arc land" to use the new MarkerRef workflow.
Test Plan: Ran "arc land" with (and without) various arguments in Mercurial, saw them resolve in a seemingly sensible way.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21335
Summary:
Ref T13546. Various Arcanist workflows, and particularly the MercurialAPI, currently repeat quite a lot of code around parsing branches and bookmarks.
In modern Mercurial, we can generally use the "head()" and "bookmark()" revsets to do this fairly sensibly.
This change mostly adds //more// code (and introduces "arc bookmarks" and "arc branches" as replacements for "arc bookmark" and "arc branch") but followups should be able to mostly delete code.
Test Plan: Ran "arc branches" and "arc bookmarks" in Git and Mercurial.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21333
Summary:
Ref T13546. Practically, this allows "arc branch" to run "arc branches".
(This risks overcorrection to some degree, but command correction only occurs if stdout is a TTY so the risk seems limited.)
Test Plan: Ran "arc branch", got "arc branches" as a correction.
Maniphest Tasks: T13546
Differential Revision: https://secure.phabricator.com/D21338
