Summary:
This need a bunch of work, but is a sort of minimum viable product for the hgdaemon.
The two ProtocolChannels implement the client and server halves of the protocol.
The Server implements the server logic, the Client implements the client logic.
Test Plan: Launched a server and client on the same repo, got hg output in ~2-3ms instead of 100ms+.
Reviewers: csilvers, btrahan, vrana
Reviewed By: csilvers
CC: aran
Differential Revision: https://secure.phabricator.com/D2665
Summary:
Currently, when a file has a syntax error and you run "arc liberate", the symbol analyzer will fail and throw, which will make the mapper fail and throw, which will make arc fail and throw. This gives you a stack trace pile three scripts deep which is a giant pain to analyze visually.
Instead, raise a clear message.
Test Plan: Ran "arc liberate" with a syntax error. Got useful diagnostic output instead of 30 pages of stack mess.
Reviewers: vrana, btrahan
Reviewed By: vrana
CC: aran
Differential Revision: https://secure.phabricator.com/D2659
Summary:
We added "repeat" to PhutilArgumentParser a while ago, so we can modernize the rest of the argument parsing (allow multiple --load-phutil-library flags).
Add a "--conduit-timeout" flag to allow users to set the timeout. See D2602.
Test Plan:
$ arc diff --conduit-timeout=0.01
Exception
[cURL/28] <CURLE_OPERATION_TIMEOUTED> The request took too long to complete.
(Run with --trace for a full exception trace.)
$ arc diff --conduit-version 33
Exception
ERR-BAD-VERSION: Your 'arc' client version is '33', which is newer than the server version, '5'. Upgrade your Phabricator install.
(Run with --trace for a full exception trace.)
$ arc diff --conduit-uri http://derp.derp/
Usage Exception: YOU NEED TO INSTALL A CERTIFICATE TO LOGIN TO PHABRICATOR
You are trying to connect to 'http://derp.derp/api/' but do not have a certificate installed for this host. Run:
$ arc install-certificate
...to install one.
$ arc diff --load-phutil-library src --load-phutil-library ../phabricator/src --trace
Loading phutil library '0' from '/INSECURE/devtools/arcanist/src'...
Loading phutil library '1' from '/INSECURE/devtools/phabricator/src'...
Reviewers: phleet, vrana, btrahan
Reviewed By: btrahan
CC: aran
Differential Revision: https://secure.phabricator.com/D2603
Summary:
Khan Academy is looking into lint configuration, but doesn't use ".arcconfig" because they have a large number of repositories. Making configuration more flexible generally gives us more options for onboarding installs.
- Currently, only project config (".arcconfig") can load libraries. Allow user config ("~/.arcrc") to load libraries as well.
- Currently, only project config can set lint/unit engines. Allow user config to set default lint/unit engines.
- Add some type checking to "arc set-config".
- Add "arc set-config --show".
Test Plan:
- **load**
- Ran `arc set-config load xxx`, got error about format.
- Ran `arc set-config load ["apple"]`, got warning on running 'arc' commands (no such library) but was able to run 'arc set-config' again to clear it.
- Ran `arc set-config load ["/path/to/a/lib/src/"]`, worked.
- Ran `arc list --trace`, verified my library loaded in addition to `.arcconfig` libraries.
- Ran `arc list --load-phutil-library=xxx --trace`, verified only that library loaded.
- Ran `arc list --trace --load-phutil-library=apple --trace`, got hard error about bad library.
- Set `.arcconfig` to point at a bad library, verified hard error.
- **lint.engine** / **unit.engine**
- Removed lint engine from `.arcconfig`, ran "arc lint", got a run with specified engine.
- Removed unit engine from `.arcconfig`, ran "arc unit", got a run with specified engine.
- **--show**
- Ran `arc set-config --show`.
- **misc**
- Ran `arc get-config`.
Reviewers: csilvers, btrahan, vrana
Reviewed By: csilvers
CC: aran
Differential Revision: https://secure.phabricator.com/D2618
Summary:
Adds a linter for v2 libraries which raises the relevant errors.
NOTE: Not hooked up anywhere yet, so this diff has no effect.
Test Plan:
Switched the ModuleLinter to LibraryLinter and ran it with a junk block to trigger errors:
>>> Lint for src/lint/linter/phutillibrary/ArcanistPhutilLibraryLinter.php:
Error (PHL3) One Class Per File
File 'lint/linter/phutillibrary/ArcanistPhutilLibraryLinter.php' mixes
function (id) and class/interface (ArcanistPhutilLibraryLinter)
definitions in the same file. A file which declares a class or an
interface MUST declare nothing else.
190 }
191
192 if (false) {
193 function id() { }
194 new XYZ();
195 }
Error (PHL2) Duplicate Symbol
Definition of function 'id' in
'lint/linter/phutillibrary/ArcanistPhutilLibraryLinter.php' in library
'arcanist' duplicates prior definition in 'utils/utils.php' in library
'phutil'.
190 }
191
192 if (false) {
193 function id() { }
194 new XYZ();
195 }
Error (PHL1) Unknown Symbol
Use of unknown class 'XYZ'. This symbol is not defined in any loaded
libphutil library.
191
192 if (false) {
193 function id() { }
194 new XYZ();
195 }
Reviewers: vrana, btrahan
Reviewed By: vrana
CC: aran
Maniphest Tasks: T1103
Differential Revision: https://secure.phabricator.com/D2597
Summary:
For `PhutilSymbolLoader` queries which include `setAncestorClass()`, we need the map of which classes/interfaces things extend/implement to issue the query efficiently.
Without this map, we need to load //every// class/interface and then do `is_subclass_of()`. This is doable, but not very performant if we don't have php-fpm warmup. There are a few performance-sensitive interfaces where we run queries like this, including some in Arcanist, where we'll never have warmup.
This map isn't particularly difficult to generate or maintain, so just include it in symbol generation and in the library map.
Also set parallelism with a flag, since it was arbitrarily hard-coded and adding flags is easy. 8 actually seems approximately optimal on my machine at least, though.
Test Plan: Ran "phutil_rebuild_map.php", opened library map, got a reasonable extension map.
Reviewers: vrana, btrahan
Reviewed By: vrana
CC: aran
Maniphest Tasks: T1103
Differential Revision: https://secure.phabricator.com/D2585
Summary:
Modernize `phutil_mapper.php` to prepare for killing `__init__.php`.
The current mapper is module-oriented and complex. Instead, make the mapper file-oriented and simpler.
We build a one-to-one cache of file content to symbols (built with `phutil_symbols.php`) and then write a simpler map. See some discussion in D2561.
Also make the script less messy/bad in general. It may be useful to compare this to phutil_mapper.php.
(Additionally, we now write versions into the library map and cache.)
NOTE: Nothing can read this new map right now, of course.
Test Plan: Ran "phutil_rebuild_map.php src/" in phabricator/ with --quiet, --drop-caches, etc. Verified cache file, cache behavior, and generated map output.
Reviewers: vrana, nh, btrahan
Reviewed By: vrana
CC: aran
Maniphest Tasks: T1103
Differential Revision: https://secure.phabricator.com/D2562
Summary:
With the current order of the include_path (checking in the parent dir of
arcanist last), it is possible to load the wrong libphutil which can have
bad side effects. Instead, the first place we check in include_path should
be the parent dir of arcanist.
(The issue I ran into is that I had a checkout of libphutil in my homedir,
and I was running arc from my homedir with --load-phutil-library to load
the libraries, and since ./ is the default value for include_path, we were
loading libphutil from my homedir instead of from alongside the copy of arc
that I was running. The libphutil alongside that copy of arc worked, but my
checkout of libphutil had D2545 in it, so it was broken.)
Test Plan:
ran arc (not in my homedir) with a broken libphutil in my homedir in my homedir
and it worked (before this change it didn't)
Reviewers: jungejason, vrana, epriestley
Reviewed By: vrana
CC: aran, Koolvin
Differential Revision: https://secure.phabricator.com/D2576
Summary: Git supports this feature (https://git.wiki.kernel.org/index.php/Aliases), it's fairly simple to implement, and gives us a little more ammunition to dissuade users with unusual workflow requirements from actually requesting features.
Test Plan: Defined the alias described in the documentation. Ran "arc ls", "arc ls -alh", etc.
Reviewers: btrahan, csilvers
Reviewed By: csilvers
CC: aran
Differential Revision: https://secure.phabricator.com/D2552
Summary:
Several related changes:
- Add a "--conduit-version" flag, so you can actually diff conduit version bumps. Otherwise, the server rejects you.
- Make "arc upgrade" upgrade both libphutil and arcanist, not just arcanist.
- Bump the version number to 5. See D2527.
Test Plan:
- Ran "arc upgrade".
- Ran "arc diff". Got told there was a version issue.
- Ran "arc diff --conduit-version=4" to create this diff.
Reviewers: indiefan, nh, vrana, btrahan, jungejason, Makinde
Reviewed By: vrana
CC: aran
Differential Revision: https://secure.phabricator.com/D2528
Summary:
This is mostly an onboarding thing, but also allows "arc upload", "arc download", and "arc paste" to work anywhere on the system.
- Try to read the Phabricator install URI from arc global config if we can't find ".arcconfig".
- Build a WorkingCopy anyway if we can't find ".arcconfig", as long as we can find ".svn", ".git", or ".hg".
- Make all the workflows handle "no project ID" at least somewhat gracefully.
Test Plan:
- Ran "arc diff" in .arcconfig-less Mercurial, Git, and Subversion working copies.
- Ran "arc upload" and "arc download" from my desktop.
- Ran "arc paste" from somewhere random.
- Cleared my config and hit the error, got useful instructions.
Reviewers: btrahan, csilvers
Reviewed By: csilvers
CC: aran
Differential Revision: https://secure.phabricator.com/D2424
Summary: We do this in Windows, but it's not available by default in Ubuntu
Test Plan: Ran "arc" after faking the function name, got a reasonable error.
Reviewers: btrahan, jungejason
Reviewed By: btrahan
CC: aran
Differential Revision: https://secure.phabricator.com/D2404
Summary:
rPHUf9ba25d188c1dcf39e4454b2c6bb058e0beeaa3e adds
global function phutil_is_hiphop_runtime() to
__phutil_library_init__.php. This diff helps lint files that call that
function.
Test Plan: Lint D2365.
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, Koolvin
Differential Revision: https://secure.phabricator.com/D2366
Summary:
For Objective-C repositories, we want to provide aliases to
arc diff --amend-autofixes by default.
This adds the ability to define aliases in .arcconfig (overridden
by any specified in the user config, of course).
Test Plan:
Tested defining alias with nothing in .arcconfig, with
an alias in .arcconfig. Tested arc alias outside of working
repository.
Reviewers: epriestley
Reviewed By: epriestley
CC: aran
Differential Revision: https://secure.phabricator.com/D2191
Summary:
Missed this when I moved the document a while ago. See <https://github.com/facebook/arcanist/issues/21>.
NOTE: The actual document isn't very helpful in figuring out the error. I'll address this in a followup.
Test Plan: Hit error, clicked link, got docs.
Reviewers: btrahan
Reviewed By: btrahan
CC: jmhsieh, aran, epriestley
Differential Revision: https://secure.phabricator.com/D1989
Summary:
See D1950, same patch for arc/.
NOTE: I'm moving the ob_get_level() stuff to libphuil.
Test Plan: Ran "arc".
Reviewers: btrahan, killermonk
Reviewed By: btrahan
CC: aran, epriestley
Differential Revision: https://secure.phabricator.com/D1951
Summary:
Although we currently forbid anonymous functions, some day we will likely permit them, and our behavior for them is wrong.
Handle them correctly rather than throwing an exception because we should be covered by D1846 against accidental use, and we won't be on PHP 5.2 forever.
Test Plan: Ran against a test file with anonymous functions. Before, it emitted a declaration of a nameless function; afterward, it did not.
Reviewers: btrahan, edward
Reviewed By: btrahan
CC: aran, epriestley
Maniphest Tasks: T963
Differential Revision: https://secure.phabricator.com/D1847
Summary: `arc which` and related workflows have supplanted these now-unused mechanisms.
Test Plan: Grepped for chooseRevision() and DifferentialRevisionRef.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran, epriestley
Differential Revision: https://secure.phabricator.com/D1841
Summary:
Instead of doing custom parsing for --trace and --no-ansi, use builtin parsing.
This also gives us access to xprofile.
I eventually want to fully switch over, but that'll take some work.
Test Plan: Ran `arc list --trace`, `arc list --no-ansi`, etc.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran, epriestley
Differential Revision: https://secure.phabricator.com/D1827
Summary:
- When altering the include_path(), use PATH_SEPARATOR (";" on Windows, ":" elsewhere) instead of hard-coded ":".
- Detect missing php_curl.dll extension.
- Use APPDATA instead of HOME for storing .arcrc (the internet implies this is correct?)
- Don't try to do chmod() stuff on Windows; it's not critical and I don't want to figure out how it works.
Test Plan: Was able to run part of some arc commands on Windows.
Reviewers: btrahan, Makinde, Koolvin
Reviewed By: btrahan
CC: aran, epriestley
Maniphest Tasks: T124
Differential Revision: https://secure.phabricator.com/D1756
Summary:
Allow users to easily define aliased arc commands. This is easier than making
them muck around with shell stuff, and lets me do stuff like "arc alias adiff
diff -- --auto" so I can test --auto more easily.
There are some limitations here (for example, you can't put --trace in an alias
because it gets parsed too early) but I think it's a reasonable starting point.
Test Plan: Set, listed, removed and used aliases.
Reviewers: btrahan
Reviewed By: btrahan
CC: aran, epriestley
Maniphest Tasks: T896
Differential Revision: https://secure.phabricator.com/D1653
Summary:
See T762. Currently, some externals functions (recaptcha, xhprof) raise errors
and prevent clean runs of "arc liberate" without --force-update or a forced
cache.
Allow such symbols to be declared:
/**
* @phutil-external-symbol function some_function
*/
This prevents them from being treated as dependencies.
Test Plan: Ran "arc liberate src/ --all" on Phabricator, fixed all the warnings
by adding @phutil-external-symbol declarations.
Reviewers: btrahan, jungejason
Reviewed By: jungejason
CC: aran, jungejason
Maniphest Tasks: T762
Differential Revision: https://secure.phabricator.com/D1381
Summary: See T645. These commands take inconsistent and overly-magical arguments
right now. Instead, make them behave consistently and allow them both to operate
on "arc <workflow> path path2 path3 ...", which is a generally useful workflow.
Test Plan: Ran "arc lint <path>", "arc unit <path>", "arc lint --rev
HEAD^^^^^^", "arc unit --rev HEAD^^^^^^^^^^^^", etc. Ran "arc diff --trace" and
verified --rev argument to child workflows.
Reviewers: btrahan, jungejason
Reviewed By: btrahan
CC: aran, epriestley, btrahan
Maniphest Tasks: T645
Differential Revision: https://secure.phabricator.com/D1348
Summary:
in arcanist we are using $_SERVER['PWD'], but in some cases it
is not returning the correct result. For example, when I'm using
PhpStorm (an php IDE) to launch the script, $_SERVER['PWD'] returns the
path of the binary of the IDE:
/home/jungejason/tools/PhpStorm-107.658/bin, not the path where arcanist
is at. getcwd() returns the correct value.
One difference between getcwd() and $_SERVER['PWD'] is that getcwd()
resolves symlink where $_SERVER['PWD'] does not. From what I can see,
using realpath should work.
Test Plan:
* ran arcanist as normal and it worked;
* run arcanist in PhpStorm and it worked.
* created a symlink pointing to the repository inside which
I ran the arc command, and it worked.
* created a symlink pointing to arcanist project, run `.
* resources/shell/bash-completion` and it worked
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, epriestley
Differential Revision: https://secure.phabricator.com/D1285
Summary:
A user filed an issue on GitHub about not having 'json_decode()':
https://github.com/facebook/arcanist/issues/10
Detect this issue and raise a detailed error message.
Test Plan:
- Set minimum version to 6.0.0, arc told me to upgrade.
- Changed function/flag configuration and hit the flag and no-flag error
pathways.
Reviewers: btrahan, jungejason, rm
Reviewed By: rm
CC: aran, rm, epriestley
Differential Revision: https://secure.phabricator.com/D1267
Test Plan:
Added a test event listener, added an event dispatch in diff workflow, run the
workflow, the listener was called.
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, jungejason, epriestley
Differential Revision: 1102
(Committing on behalf of @cpiro)
Summary: there's a check beneath to see if it worked, but @require_once will
fail silently if libphutil isn't available
Test Plan: tried it with libphutil findable and not findable, got expected
behavior
Reviewers: epriestley
Reviewed By: epriestley
CC: aran, epriestley
Differential Revision: 1018
Summary:
Use $interface_name instead of $class_name when dealing with
interfaces. Problem happens when you extend an interface:
interface SubIface extends SuperIface { ...
Notice: Undefined variable: class_name in ...
Fatal error: Call to a member function getConcreteString() on a
non-object in ...
Test Plan: phutil_mapper.php works!
Summary:
The module analyzer reads "phutil_require_module" in the source of a module as a
dependency, and tries to regenerate __init__.php if symbols from that module
aren't actually used. This creates patches which don't actually resolve the
problem, since changing __init__.php won't change the dependency.
Instead, trust that anyone using phutil_require_module in the source of a module
knows what they're doing and don't mark it as a dependency.
We currently have an issue with this in phabricator's Setup process since I load
some other libraries' modules just to test if they can be loaded
@lesha, this might be the issue you reported a while ago.
Test Plan: Ran "arc lint" on a module which pulls in another module explicitly
in the source, didn't get a no-op lint error.
Reviewed By: jungejason
Reviewers: jungejason, tuomaspelkonen, aran, lesha
CC: aran, epriestley, jungejason
Differential Revision: 770
Summary: See D589. Some environments configure output buffering with a prepend script. This is rather silly, but we can at least recover from it.
Test Plan: Started multiple output buffers with ob_start() and then used phutil_console_confirm() to create a prompt. Verified that 'arc' was broken under output buffering prior to the patch, but now works correctly.
Reviewed By: dreuss
Summary:
The primary goal of this is to allow pre/post workflow hooks to upgrade a
workflow which doesn't require conduit into one which does, or one which doesn't
require authentication into one which does. They do this by calling
$workflow->establishConduit() or $workflow->authenticateConduit() respectively.
It also removes a bunch of dead code and a bunch of now-unnecessary public
interfaces.
Test Plan:
Broke my certificate and ran "arc list", "arc unit", "arc help", "arc
call-conduit".
Restored my certificate and re-ran the commands.
Reviewed By: mgummelt
Reviewers: mgummelt, jungejason, tuomaspelkonen, aran
CC: aran, epriestley, mgummelt
Differential Revision: 664
Summary:
In order to support more flexible post hooks. Also send the
error code to the hook for use by client code.
Test Plan: None
Reviewed By: epriestley
Reviewers: epriestley
CC: dpepper, aran, epriestley
Differential Revision: 656
Summary: This allows us to detect and complain about mismatched client and
server host identities. It causes some subtle and not-so-subtle problems if the
client and server don't agree on the install's primary URI.
Test Plan: Ran "arc install-certificate" and "arc list" against my local host
with intentionally bogus configs and was warned. Ran with normal configs and
everything worked.
Reviewed By: tuomaspelkonen
Reviewers: jungejason, llorca, tuomaspelkonen, aran
CC: aran, tuomaspelkonen
Differential Revision: 591
Summary:
We currently look:
- In the working copy
- Alongside libphutil/
- In PHP include_path
Before checking next to libphutil/, check next to the working copy. The problem
right now is that javelin/ references diviner/, but it won't find it next to
javelin/, only next to the libphutil/ instance which is loaded off
/home/engshare/devtools.
Test Plan: Moved javelin to tmp/javelin and diviner to tmp/divinerx. Ran 'arc
list' and got a library load error. Moved 'divinerx' to 'diviner' and ran 'arc
list'. It loaded correctly. Ran '--trace' to verify load location.
Reviewed By: cpojer
Reviewers: cpojer, jungejason
CC: aran, cpojer
Differential Revision: 568
Summary:
We give you a worthless message that doesn't point at "arc install-certificate"
if you don't have an .arcrc right now. Instead, tell the user to run "arc
install-certificate".
Test Plan:
Nuked my ~/.arcrc and tried to run "arc list".
Reviewed By: llorca
Reviewers: codeblock, llorca, jungejason, aran, tuomaspelkonen
CC: aran, llorca
Differential Revision: 538
Summary:
Right now, if you specify "/api" instead of "/api/" the entire world breaks in a
horrible way. Generally, this whole thing is silly. Just use the right path.
Test Plan:
Edited .arcconfig to use the "wrong" path, so this diff demonstrates the change
works.
Reviewed By: llorca
Reviewers: jungejason, llorca, aran, tuomaspelkonen
CC: aran, llorca, epriestley
Differential Revision: 506
Summary: This once made sense but hasn't been a reasonable default for a long time, get rid of it.
Test Plan: Ran "arc list".
Reviewers: llorca, toulouse
CC:
Differential Revision: 496
Summary:
Provide an "install-certificate" workflow to simplify ~/.arcrc edits. See also
D460.
Test Plan:
Installed certificates via "arc install-certificate".
Reviewed By: aran
Reviewers: aran, jungejason, tuomaspelkonen
CC: aran, epriestley
Differential Revision: 465
Summary:
This is sort of a guess. In D357, arc has gone crazy and removed a bunch of
'utils' dependencies for gc3. I think this is because his HPHP/i has them marked
as builtins.
However, I don't have an HPHP/i build (and probably don't have the fortitude to
build it outside of a Facebook environment, I spent about two hours on it at one
point and got maybe 25% of the way through the build process before running into
things I didn't know how to resolve) so I'm not sure this is the issue. No one
else's diffs have exhibited this problem eitehr, so I'm not confident this is
actually the problem or solution.
gc3, can you apply this locally to a copy of arcanist and then run 'arc lint'
(or 'arc lint --apply-patches') on your commit and see if it restores all the
libphutil/utils requirements?
Test Plan:
unable, see summary
Added 'array_keys' to this blacklist and verified the technical behavior of the
patch is correct by var_dump()'ing builtins.
Reviewed By: gc3
Reviewers: gc3, tuomaspelkonen, jungejason, aran
CC: aran, gc3, epriestley
Differential Revision: 361
Summary:
When you run one copy of arcanist against another copy, you previously got a
meaningless error. After D311 you get a slightly more meaningful error.
Capture the new exception and raise an extremely specific error.
NOTE: Adding arcanist to .arcconfig forces the library conflict error to
trigger; otherwise there's just an implicit conflict because 'arc' reads the
running-copy library amp instead of the working-copy library map. This only
worked before because arcanist includes itself.
Test Plan:
Ran arcanist on a different copy of arcanist, got a good error message.
Reviewed By: jungejason
Reviewers: jungejason, tuomaspelkonen, aran
CC: aran, jungejason, epriestley
Differential Revision: 312
Summary:
The story for creating and maintaining libphutil libraries and modules
is pretty terrible right now: you need to know a bunch of secret scripts and
dark magic. Provide 'arc liberate' which endeavors to always do the right thing
and put a library in the correct state.
Test Plan:
Ran liberate on libphutil, arcanist, phabricator; created new
libphutil libraries, added classes to them, liberated everything, introduced
errors etc and liberated that stuff, nothing was obviously broken in a terrible
way..?
Reviewed By: aran
Reviewers: jungejason, tuomaspelkonen, aran
CC: aran, epriestley
Differential Revision: 269
Summary:
Switch to the new PhutilServiceProfiler API.
Test Plan:
Ran "arc" with "--trace", got mostly reasonable output. I'll clean up conduit
output in a followup.
Reviewed By: aran
Reviewers: aran, jungejason, tuomaspelkonen
CC: aran
Differential Revision: 292
Summary:
display better message about the .arcconfig. The message will
be something like this now:
Usage Exception: Failed to load library "phabricator" at location
"srcaaaaa/". Please check the "phutil_libraries" setting in your
.arcconfig file. Refer to page
http://phabricator.com/docs/arcanist/article/Setting_Up_.arcconfig.html
for more info.
Test Plan:
modify the .arcconfig file to test it. Also make sure it
works for correct settings.
Reviewed By: epriestley
Reviewers: epriestley
CC: jungejason, epriestley
Differential Revision: 99
Summary:
list the hosts for which the .arcrc file have certificate and
which conduit-uri the user is trying to access.
Test Plan:
test the case where a cert is missing.
Reviewed By: epriestley
CC: epriestley
Differential Revision: 76
Summary:
Some PHP installs don't have this by default. Do a conditional check
since this functionality is noncritical.
Test Plan:
will make srash test
Differential Revision: 43
Reviewed By: aran
Reviewers: rash67, aran, jungejason
CC: aran
Summary: Haiping is getting a pretty confusing error message when trying to
commit.
Test Plan: Created a mock repository, installed the hook, made commits against
directories with bad .arcconfigs.
Reviewers:
CC:
