Properly handle file moves in `arc patch` under SVN

Summary:
If the file has no changes (probably because it has been moved or copied) then we fail.

Fixes T1708, fixes T1559.

Test Plan:
  $ svn mv a b
  $ arc diff --only
  $ svn revert a b
  $ arc patch --diff # of created diff

Reviewers: epriestley, btrahan

Reviewed By: btrahan

CC: aran, Korvin

Maniphest Tasks: T1559, T1708

Differential Revision: https://secure.phabricator.com/D3526
Handle empty file add in Git export

Summary: Fixes T1555.

Test Plan: Added empty file, diffed it, exported and patched. Also manually created diff in Differential.

Reviewers: btrahan, epriestley

Reviewed By: btrahan

CC: aran, Korvin

Maniphest Tasks: T1555

Differential Revision: https://secure.phabricator.com/D3536
Add git-repo-based bundle tests

Summary:
Adds a test which goes through a git repository commit by commit and applies them (in effect) via "arc patch", verifying that the results match the actual commit.

See D3439 for the fixture stuff.

The git repo archive has a couple of trivial commits in it:

  $ ../libphutil/scripts/utils/directory_fixture.php src/parser/__tests__/bundle.git.tgz
  Spawning an interactive shell. Exit when complete.

  sh-3.2$ git log
  commit f19fb9fa1385c01b53bdb6d8842dd154e47151ec
  Author: epriestley <git@epriestley.com>
  Date:   Wed Sep 5 14:30:28 2012 -0700

      Edit a text file.

  commit 228d7be4840313ed805c25c15bba0f7b188af3e6
  Author: epriestley <git@epriestley.com>
  Date:   Wed Sep 5 14:30:11 2012 -0700

      Add a text file.

Test Plan: Ran tests.

Reviewers: edward

Reviewed By: edward

CC: aran

Maniphest Tasks: T866

Differential Revision: https://secure.phabricator.com/D3440
Reformat lint severities for readability

Summary: See D3482.

Test Plan: `arc lint`

Reviewers: vrana

Reviewed By: vrana

CC: aran

Differential Revision: https://secure.phabricator.com/D3501
fix a bug in ArcanistXHPLinter

Summary: $param is null here. it should be $node.

Test Plan: arc lint no longer barfed on me!

Reviewers: vrana, epriestley

Reviewed By: vrana

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3540
Make `arc diff --background 1` default and disable it on Windows

Summary:
I am using it for about a month.
It works even in Facebook www.

Test Plan:
  $ arc diff --background 1 # hundreds of times

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3495
Flush output before printing lint and unit results in diff

Summary:
Under HPHP, output buffer size is ignored.
Flush any buffered output before printing anything from `arc diff` to reduce user's confusion.

Test Plan:
  $ arc diff --preview --background 1
  $ arc diff --preview --background 0

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3543
Step towards working `arc diff --background 1` on Windows

Summary:
Running `a.php` from command line doesn't work on Windows, we need to run `php a.php`.
This shouldn't break other OSes.

Test Plan:
  $ arc diff --background 1

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3544
Unuse $argv in `arc diff --background`

Test Plan: This diff.

Reviewers: epriestley

Reviewed By: epriestley

CC: zeeg, aran, Korvin

Differential Revision: https://secure.phabricator.com/D3550
Don't run background process with raw diff source

Test Plan:
  $ arc diff

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3553
Patch 'unix:filemode' property as 'svn:executable' in SVN

Summary: Patch created on Git contains 'unix:filemode' property which is useless in SVN.

Test Plan: Exported a bundle changing a file to executable in Git, applied it in SVN, verified that the file is executable.

Reviewers: epriestley

Reviewed By: epriestley

CC: ptarjan, aran, Korvin, digoangeline

Differential Revision: https://secure.phabricator.com/D3554
Delete flushing moved to libphutil

Test Plan:
  $ arc diff # under HPHP

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3563
Search for SVN commit in Git SVN repository

Summary: `arc patch` currently warns about "This diff is against commit svn+ssh://... but the commit is nowhere in the working copy" in Git SVN repository.

Test Plan:
  $ arc patch # in Git SVN repository
  $ svn find-rev r121212112 # invalid revision

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3539
Search for more test locations in PHPUnitTestEngine

Summary:
See https://github.com/facebook/arcanist/pull/53

  - Work correctly for directories with `%` in their name; this breaks under sprintf().
  - Search for `src/` -> `tests/` style directories.
  - Add coverage for search paths.

Test Plan:
Ran unit tests.

I don't have a working test case for PHPUnit tests, can one of you guys apply this and verify I didn't break your setups?

Reviewers: quard, aurelijus

Reviewed By: aurelijus

CC: aran

Differential Revision: https://secure.phabricator.com/D3558
Make `arc tasks` print output in a unicode-aware and console-width-aware way

Summary:
Currently, we print `arc tasks` in a console-agnostic and unicode-unaware way, so:

  - Tasks with multibyte characters get aligned incorrectly (see T1831); and
  - narrow terminals plus long task names results in a broken display.

Test Plan: Ran `arc tasks`. Will post screenshots.

Reviewers: btrahan, vrana, Korvin

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T749, T1831

Differential Revision: https://secure.phabricator.com/D3568
Amend commit after editing the message in diff

Summary:
We store the message to a scratch file.
But if I need to switch context, commit something else and then go back then I'll lose the message.
Amend the repository commit by it instead.
This also removes the annoying question "Do you want to use this message?".

Test Plan: Made an error in message, verified Git log.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3561
Improve handling of `--background` with `--base`

Summary:
Currently, we run `runDiffSetupBasics()` //after// splitting off background lint and unit tests. However, this means `--base` and any explicit revision name (like "HEAD^") will not be parsed, so the call to `getRelativeCommit()` in order to generate `arc lint --rev XXX` will fail or not work as expected, because it will ignore any arguments.

Instead, parse `--base`, explicit revisions, and other repository API arguments before doing lint and unit tests.

Test Plan:
  - Set global config for `base` to `arc:amended, git:branch-unique(origin/master)`.
  - Created a commit on master.
  - Ran `arc diff HEAD^`.
    - Before this change, the command fails with "Usage Exception: None of the rules in your 'base' configuration matched a valid commit. Adjust rules or specify which commit you want to use explicitly." when it attempts to run lint, because the `HEAD^` argument is never parsed. After
    - After this change, the command succeeds.

Reviewers: vrana

Reviewed By: vrana

CC: aran

Differential Revision: https://secure.phabricator.com/D3574
Correctly mark patched text in lint console renderer

Summary:
Before:
`    >>> -      4 `**1**`* Copyright 2011 Facebook, Inc.`

After:
`    >>> -      4  * Copyright 201`**1**` Facebook, Inc.`

Test Plan: Rendered patchable message, multiline patchable message, unpatchable message.

Reviewers: andrewjcg, epriestley

Reviewed By: epriestley

CC: aran, Korvin

Differential Revision: https://secure.phabricator.com/D3604
make arc commit work on windows with multiline messages

Summary: cd && cmd won't work so use chdir; -m $multiline_message won't work so use -F $tmp_file

Test Plan: this is actually un-tested at the moment.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T1617

Differential Revision: https://secure.phabricator.com/D3592
Retain newline style when generating diffs

Summary: Builds on D3441, D3440. Instead of exploding on "\r?\n" and then imploding on "\n", retain newline style throughout parsing.

Test Plan:
All unit tests pass (the parser has substantial existing coverage). These new tests pass in the git commit-by-commit test case:

  commit 176a4c2c3fd88b2d598ce41a55d9c3958be9fd2d
  Author: epriestley <git@epriestley.com>
  Date:   Wed Sep 5 14:56:08 2012 -0700

      Convert \r\n newlines to \n newlines.

  commit a73b28e139296d23ade768f2346038318b331f94
  Author: epriestley <git@epriestley.com>
  Date:   Wed Sep 5 14:55:31 2012 -0700

      Add text with \r\n newlines.

  commit 337ccec314075a2bdb4a912ef467d35d04a713e4
  Author: epriestley <git@epriestley.com>
  Date:   Wed Sep 5 14:55:13 2012 -0700

      Convert \n newlines to \r\n newlines.

  commit 6d5e64a4a7a6a036c53b1d087184cb2c70099f2c
  Author: epriestley <git@epriestley.com>
  Date:   Wed Sep 5 14:53:39 2012 -0700

      Remove tabs.

  commit 49395994a1a8a06287e40a3b318be4349e8e0288
  Author: epriestley <git@epriestley.com>
  Date:   Wed Sep 5 14:53:33 2012 -0700

      Add tabs.

  commit a5a53c424f3c2a7e85f6aee35e834c8ec5b3dbe3
  Author: epriestley <git@epriestley.com>
  Date:   Wed Sep 5 14:52:57 2012 -0700

      Add trailing newline.

  commit d53dc614090c6c7d6d023e170877d7f611f18f5a
  Author: epriestley <git@epriestley.com>
  Date:   Wed Sep 5 14:52:41 2012 -0700

      Remove trailing newline.

Previously, the newline-related tests failed.

Reviewers: vrana, btrahan

Reviewed By: vrana

CC: aran

Maniphest Tasks: T866

Differential Revision: https://secure.phabricator.com/D3442