Merging r366811, r366880, r366900, r366991 and r366992:
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Authored by hansw on Jul 25 2019, 8:06 AM.

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Merging r366811, r366880, r366900, r366991 and r366992:

r366811 | sammccall | 2019-07-23 16:30:28 +0200 (Tue, 23 Jul 2019) | 9 lines

[clangd] Log version, cwd, args, and transport on startup. NFC

Reviewers: hokein

Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, kadircet, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D65146

r366880 | sammccall | 2019-07-24 11:33:27 +0200 (Wed, 24 Jul 2019) | 9 lines

[clangd] Reformat use of cl::opt: use unqualified name and don't bin-pack attributes. NFC

Reviewers: kadircet

Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D65154

r366900 | sammccall | 2019-07-24 14:41:52 +0200 (Wed, 24 Jul 2019) | 16 lines

[clangd] Add categories to help options, and only show clangd options.

Summary:
Restricting the categories prevents extra unwanted options from creeping into
help (D60663), and removes a bunch of noise from --help-hidden.

While here, remove static from the opts in favor of an anon namespace, to
reduce the noise level.

Reviewers: hokein

Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, kadircet, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D65200

r366991 | sammccall | 2019-07-25 09:54:48 +0200 (Thu, 25 Jul 2019) | 13 lines

[clangd] Also accept flags from CLANGD_FLAGS variable.

This simplifies various workflows, particularly in debugging/development.
e.g. editors will tend to propagate flags, so you can run
env CLANGD_FLAGS=-input-mirror-file=/tmp/mirror vim foo.cc rather than
change the configuration in a persistent way.
(This also gives us a generic lever when we don't know how to customize
the flags in some particular LSP client).

While here, add a test for this and other startup logging, and fix a
couple of direct writes to errs() that should have been logs.