Added ldap import controller
Simplify build file from data-or-hash code

Summary:
We have a bit more copy-paste than we need, consolidate a bit.

(Also switch Mercurial to download git diffs, which it handles well; we use them in "arc patch".)

Test Plan:
  - Downloaded a raw diff from Differential.
  - Downloaded a raw change from Diffusion.
  - Downloaded a raw file from Diffusion.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D2942
Update GitHub oauth docs

Summary: GitHub moved these pages around and made it easier to find your application list.

Test Plan: Read docs, verified links are correct.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D2941
Add a generic object for unit tests

Summary:
A later diff adds unit tests against edges, but we need real objects to connect with edges. Add some trivial objects to the Harbormaster database to compliment the similar HarbormasterScratchTable.
On its own, this does nothing interesting.

Test Plan: Built unit tests on this in a followup.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1162

Differential Revision: https://secure.phabricator.com/D2937
Store forced connections in the Lisk connection cache

Summary:
In unit tests which use fixtures, we open transactions on every connection we establish. However, since we don't track connections that are established with "$force_new" (currently, only GlobalLock connections) we never close these transactions normally.

Instead of not tracking these connections, track them using unique keys so we'll never get a cache hit on them.

Test Plan: Built unit tests on top of this, had them stop dying from unclosed transactions.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1162

Differential Revision: https://secure.phabricator.com/D2938
Namespace GlobalLocks to storage namespaces

Summary:
Currently, multiple unit tests that acquire global locks will interfere with each other. Namespace the locks so they don't.

(Possibly we should also rename this to PhabricatorStorageNamespaceLock or something since it's not really global any more, but that's kind of unwieldy...)

Test Plan: Acquired locks with --trace and verified they were namespaced properly.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1162

Differential Revision: https://secure.phabricator.com/D2939
Allow edges to be configured to prevent cycles

Summary:
Certain types of things we should be storing in edges (notably, Task X depends on Task Y) should always be acyclic. Allow `PhabricatorEdgeEditor` to enforce this, since we can't correctly enforce it outside of the editor without being vulnerable to races.

Each edge type can be marked acyclic. If an edge type is acyclic, we perform additional steps when writing new edges of that type:

  - We acquire a global lock on the edge type before performing any reads or writes. This ensures we can't produce a cycle as a result of a race where two edits add edges which independently do not produce a cycle, but do produce a cycle when combined.
  - After performing writes but before committing transactions, we load the edge graph for each acyclic type and verify that it is, in fact, acyclic. If we detect cycles, we abort the edit.
  - When we're done, we release the edge type locks.

This is a relatively high-complexity change, but gives us a simple way to flag an edge type as acyclic in a robust way.

Test Plan: Ran unit tests.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1162

Differential Revision: https://secure.phabricator.com/D2940
Limit maximum size of Owners package queries

Summary:
Currently, a change may affect a very large number of paths. When we run the OwnersWorker on it, we'll execute a query which looks up packages for the paths. This may exceed "max_allowed_packet". Instead, break the list of paths into smaller chunks.

This is mostly to unblock r4nt / llvm, I'm going to add a more finessed approach to array_chunk() shortly.

Test Plan: Ran `reparse.php --owners` on a revision which affected packages, verified results are the same before and after the change. Set chunk size to 1, verified query results aggregated properly.

Reviewers: btrahan, jungejason, nh

Reviewed By: jungejason

CC: aran

Differential Revision: https://secure.phabricator.com/D2943
Add a generic multistep Markup cache

Summary:
The immediate issue this addresses is T1366, adding a rendering cache to Phriction. For wiki pages with code blocks especially, rerendering them each time is expensive.

The broader issue is that out markup caches aren't very good right now. They have three major problems:

**Problem 1: the data is stored in the wrong place.** We currently store remarkup caches on objects. This means we're always loading it and passing it around even when we don't need it, can't genericize cache management code (e.g., have one simple script to drop/GC caches), need to update authoritative rows to clear caches, and can't genericize rendering code since each object is different.

To solve this, I created a dedicated cache database that I plan to move all markup caches to use.

**Problem 2: time-variant rules break when cached.** Some rules like `**bold**` are time-invariant and always produce the same output, but some rules like `{Tnnn}` and `@username` are variant and may render differently (because a task was closed or a user is on vacation). Currently, we cache the raw output, so these time-variant rules get locked at whatever values they had when they were first rendered. This is the main reason Phriction doesn't have a cache right now -- I wanted `{Tnnn}` rules to reflect open/closed tasks.

To solve this, I split markup into a "preprocessing" phase (which does all the parsing and evaluates all time-invariant rules) and a "postprocessing" phase (which evaluates time-variant rules only). The preprocessing phase is most of the expense (and, notably, includes syntax highlighting) so this is nearly as good as caching the final output. I did most of the work here in D737 / D738, but we never moved to use it in Phabricator -- we currently just do the two operations serially in all cases.

This diff splits them apart and caches the output of preprocessing only, so we benefit from caching but also get accurate time-variant rendering.

**Problem 3: cache access isn't batched/pipelined optimally.** When we're rendering a list of markup blocks, we should be able to batch datafetching better than we do. D738 helped with this (fetching is batched within a single hunk of markup) and this improves batching on cache access. We could still do better here, but this is at least a step forward.

Also fixes a bug with generating a link in the Phriction history interface ($uri gets clobbered).

I'm using PHP serialization instead of JSON serialization because Remarkup does some stuff with non-ascii characters that might not survive JSON.

Test Plan:
  - Created a Phriction document and verified that previews don't go to cache (no rows appear in the cache table).
  - Verified that published documents come out of cache.
  - Verified that caches generate/regenerate correctly, time-variant rules render properly and old documents hit the right caches.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1366

Differential Revision: https://secure.phabricator.com/D2945
Fix symbol handling in symbol query and IRC "Where is x?" handler

Summary: If a symbol's project has no linked repository, we currently explode. Instead, decline to generate a URI and fall back gracefully.

Test Plan: https://secure.phabricator.com/chatlog/channel/%23phabricator/?at=22345

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1465

Differential Revision: https://secure.phabricator.com/D2948
Refactor methods, fix style issues
Fix some mercurial edge cases

Summary:
  - Old versions of Mercurial give different output for `hg log -- ''` and `hg log`. Just use `hg log`.
  - Branch names with spaces can't be specified in `--rev`. I talked with hstuart in #mercurial and apparently am not crazy.

Test Plan:
  - Viewed history of a repository.
  - Viewed history of a file.
  - Viewed branch `m m m m m 2:ffffffffffff (inactive)`
  - Learned that you checkout this branch with `hg checkout ':m m m m m 2:ffffffffffff (inactive)'`

Reviewers: dschleimer, btrahan

Reviewed By: dschleimer

CC: aran

Maniphest Tasks: T1268

Differential Revision: https://secure.phabricator.com/D2950
Support postponed lint status in creatediff conduit call

Test Plan:
Created diff with a postponed linter and the lint status set to such
via arcanist.  Verified lint status showed as postponed in diff view.

Reviewers: epriestley, vrana

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1332

Differential Revision: https://secure.phabricator.com/D2932
Fixed 'Sever' Typo
Use the unified markup cache for Maniphest

Summary:
  - See D2945.
  - Drop `cache` field from ManiphestTransaction.
  - Render task descriptions and transactions through PhabricatorMarkupEngine.
  - Also pull the list of macros more lazily.

Test Plan:
  - Verified transactions and transaction preview work correctly and interact with cache correctly.
  - Verified tasks descriptions and task preview work correctly.
  - Verified we don't hit the imagemacro table when we're rendering everything from cache anymore.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D2946
Add markup cache collection to the GC daemon

Summary: Allow the GC daemon to collect the new markup cache.

Test Plan: Ran gc daemon in "debug" mode, saw it collect cache entries.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D2947
Make IRC Bot connect on both successful end of MOTD (376) and non-successful MOTD (422)

Summary: http://www.networksorcery.com/enp/protocol/irc.htm

Test Plan: augment code with an additional debug line (phlog('hi');) so I can see my case was trigged and it will fall through. setup an ill-configured IRC server with ngircd. Configure an ircbot to connect to said ill-configured IRC server. verify ircbot connected to channel. verify in irc bot logs that debug line was invoked.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1452

Differential Revision: https://secure.phabricator.com/D2962
Don't fatal on missing commit in DiffusionBrowseFileController

Summary:
Still not 100% sure what the repro case here is, but we do something similar on line 438 above. One case could be an SVN repo with a subpath specified, I think.

In any case, don't fatal if we're missing the commit.

Test Plan: Loaded some browse views, although I don't have a repro.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Differential Revision: https://secure.phabricator.com/D2959
Improve Windows editor documentation with specific examples for popular editors

Summary: See D2955, D2956, D2957.

Test Plan: Read documentation. Ran all these commands from Git Bash and cmd.exe and used the specified editors to edit blocks of text.

Reviewers: btrahan, jungejason

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T1309

Differential Revision: https://secure.phabricator.com/D2958
Merge pull request #151 from flxf/sever_typo

Fixed 'Sever' Typo