[ews-build] Do not print worker environment variables in each build step

[Aakash Jain]

By default Buildbot prints worker's environment variables in each build step. This is unnecessary and makes the logs hard to read. We should disable printing environment variable in most of the build steps.

example (from https://ews-build.webkit.org/#/builders/9/builds/1071/steps/5/logs/stdio):
environment:
  Apple_PubSub_Socket_Render=/private/tmp/com.apple.launchd.aTwloZVLIM/Render
  HOME=/Users/buildbot
  LOGNAME=buildbot
  OLDPWD=/Users/buildbot
  PATH=/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
  PWD=/Volumes/Data/worker/API-Tests-iOS-Simulator-EWS/build
  PYPI_MIRRORS=pypi.apple.com
  SHELL=/bin/bash
  SHLVL=1
  SSH_AUTH_SOCK=/private/tmp/com.apple.launchd.D4SBJF1v2I/Listeners
  TMPDIR=/var/folders/vr/hgrp98wj6w797xrk_t22t3vh0000gn/T/
  USER=buildbot
  VERSIONER_PYTHON_PREFER_32_BIT=no
  VERSIONER_PYTHON_VERSION=2.7
  XPC_FLAGS=0x0
  XPC_SERVICE_NAME=0
  _=/usr/local/bin/twistd
  __CF_USER_TEXT_ENCODING=0x1F5:0x0:0x0
 using PTY: False

[Aakash Jain]

Created attachment 368335 [details]
Patch

[EWS Watchlist]

Attachment 368335 [details] did not pass style-queue:


ERROR: Tools/BuildSlaveSupport/ews-build/steps.py:128:  [ApplyPatch.__init__] Use of super on an old style class  [pylint/E1002] [5]
ERROR: Tools/BuildSlaveSupport/ews-build/steps.py:687:  [ArchiveBuiltProduct.__init__] Use of super on an old style class  [pylint/E1002] [5]
ERROR: Tools/BuildSlaveSupport/ews-build/steps.py:729:  [DownloadBuiltProduct.__init__] Use of super on an old style class  [pylint/E1002] [5]
ERROR: Tools/BuildSlaveSupport/ews-build/steps.py:742:  [ExtractBuiltProduct.__init__] Use of super on an old style class  [pylint/E1002] [5]
ERROR: Tools/BuildSlaveSupport/ews-build/steps.py:756:  [RunAPITests.__init__] Use of super on an old style class  [pylint/E1002] [5]
Total errors found: 5 in 3 files


If any of these errors are false positives, please file a bug against check-webkit-style.

[Lucas Forschler]

looks good to me, except for the style errors... (not sure if that is avoidable)

[Dean Johnson]

Comment on attachment 368335 [details]
Patch

Maybe it'd be worth setting logEnviron=False in a new base class that inherited from shell.ShellCommand? Such as:

class MinimalLoggingShellCommand(shell.ShellCommand):
    logEnviron = False

[Dean Johnson]

If you decide not to wrap shell.ShellCommand, I think the style errors can be avoided by moving the logEnviron=False to member vars of each class you want them used for. It's also a bit more clear since that's how other (static) step configurations are set.

[Aakash Jain]

> class MinimalLoggingShellCommand(shell.ShellCommand):
>     logEnviron = False

logEnviron can not be a class variable, it has to be passed an instance variable (passed in __init__). We noticed similar behavior with 'timeout' in https://github.com/buildbot/buildbot/issues/3887#issuecomment-356736827

[Aakash Jain]

Created attachment 372993 [details]
Patch

[WebKit Commit Bot]

Comment on attachment 372993 [details]
Patch

Clearing flags on attachment: 372993

Committed r246882: <https://trac.webkit.org/changeset/246882>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.

[Radar WebKit Bug Importer]

<rdar://problem/52263170>