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cpplint.py is BSD licensed, everything else is CC-by-3.0 licensed.

Bug: 69320067
Bug: 68951293
Change-Id: I7bd40c561430d597bf69a358d2a1e634a40eed38

Bug: 68951293
Change-Id: I5b61c58c90caeb373b2e50466db08da2584998ce

Change-Id: I9d4f9397214a9a9957490bf843f2e07cb16db0f4
Bug: 68951293

cpplint: add --quiet flag to suppress all output when there's no errors

Example:

   cpplint.py --quiet <file-names>

Will now return with an exit code of 0 and return empty output if there
were no errors. This makes it particularly useful to be driven by a build system
such as makefiles or gradle.

In particular, these messages are now suppressed:

  Ignoring <filename>, excluded by CPPLINT.cfg, ...
  Done processing <filename>
  Total errors found: 0

If there were any errors, the above messages are printed nevertheless.

There is no behavior change if --quiet is not passed in.

CPPLINT.cfg root=setting is now relative to CFG file.

Also further improve the documentation and testing around --root.

Previously the root=setting in the CFG file was treated identically
to passing --root=setting on the command line, which seems undesirable
since it depends on were cpplint.cfg was invoked from (for relative
paths).

Judging on settings such as 'exclude_files' it seems within the spirit
to make the settings 'current working directory' contextual to the
same directory that CPPLINT.cfg is in.

This also makes execution consistent (picking up the "correct" settings)
regardless of the CWD when executing cpplint.py.

Example:

  echo 'root=..' >> /a/b/c/CPPLINT.cfg
  cd /
  cpplint.py /a/b/c/source_file.h
  # expects header guard of C_SOURCE_FILE_H_

However the old behavior would use '/../' = '/'
and incorrectly think the root was 'A_B_C_SOURCE_FILE_H_'.

cpplint: --root now supports non-subdirectories

Using cpplint.py --root with directories at a more outer level
will now prepend the header guard with all the directories from the
root to the file.

For example given

  ls /a/b/c # /a/b/c/.git /a/b/c/filename.h
  cpplint.py --root=/a/b /a/b/c/filename.h   # C_FILENAME_H_

  # no root behavior:
  cpplint.py /a/b/c/filename.h               # FILENAME_H_

Also supports relative paths:

  cd /a/b/c
  cpplint.py --root=.. filename.h            # C_FILENAME_H_

Note that the old usage is still supported:

  cd /a/b/c
  mkdir -p d/e/f
  touch /a/b/c/d/e/f/filename.h
  cpplint.py --root=d/e/f d/e/f/filename.h   # FILENAME_H_

which would "strip" the prefix rather than prepend an extra prefix.

(Invalid root prefixes are as before also ignored)

Revert "cpplint: Fix --root for non-subdirectories"

cpplint: Fix --root for non-subdirectories

Using cpplint.py --root with directories at a more outer level
than the repository would not work.

For example given

  /a/b/c/.git/filename.cpp

Trying to use --root=/a/b would get ignored, and it would
ask for a headerguard of FILENAME_H_ instead of C_FILENAME_H_
as expected.

Now --root will always use the "full name" and then strip off --root
prefix, giving us the desired effect.

[objc] Update the Objective-C style guide 

Revision Date: 10/16/2017

Fixes #252
Fixes #253

Remove blank lines between import groups to use [code style] (https://google.github.io/styleguide/javaguide.html#s3.3.3-import-ordering-and-spacing).

Fixes #270

[objc] Make objcguide.xml link to objcguide.md 

The link can't be relative because the new style guide is served as markdown and the endpoint serving the XML file serves raw content.

[objc] Update the Objective-C style guide 

Revision Date: 8/23/2017

There are links out in the wild to the old XML style guide. An XML file that links to the new style guide location ensures that those links are not completely broken.

[objc] Update the Objective-C style guide 

Revision Date: 8/16/2017

Enabling formatter on/off tags

Update broken link