Bug 114506 – [ẁebkitpy] Executive.cpu_count() ignores $NUMBER_OF_PROCESSORS

• Component: Tools / Tests
• Status: RESOLVED FIXED

[Philippe Normand]

$NUMBER_OF_PROCESSORS is used in webkitperl, it'd be nice to have support for it in webkitpy too.

[Manuel Rego Casasnovas]

Created attachment 197852 [details]
Patch

[Philippe Normand]

Comment on attachment 197852 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=197852&action=review

> Tools/Scripts/webkitpy/common/system/executive.py:145
> +        if 'NUMBER_OF_PROCESSORS' in os.environ:

This test can be removed. os.environ.get() will return None if the env var is not set, I think.

> Tools/Scripts/webkitpy/common/system/executive.py:150
> +            except:

please explicitely catch ValueError :)

[Manuel Rego Casasnovas]

Created attachment 198023 [details]
Patch

os.environ.get() returns None, but None has type NoneType and if you use it in int() it raises a TypeError exception instead of a ValueError. So, I've kept the if checking that the environment variable is defined and then I've added ValueError in the catch clause.

[Philippe Normand]

(In reply to comment #3)
> Created an attachment (id=198023) [details]
> Patch
> 
> os.environ.get() returns None, but None has type NoneType and if you use it in int() it raises a TypeError exception instead of a ValueError. So, I've kept the if checking that the environment variable is defined and then I've added ValueError in the catch clause.

Well, it's possible to catch multiple exceptions with a single except or even multiple except statements :)

[Manuel Rego Casasnovas]

Created attachment 198048 [details]
Patch

[Zan Dobersek]

(In reply to comment #3)
> Created an attachment (id=198023) [details]
> Patch
> 
> os.environ.get() returns None, but None has type NoneType and if you use it in int() it raises a TypeError exception instead of a ValueError. So, I've kept the if checking that the environment variable is defined and then I've added ValueError in the catch clause.

It's possible to define the default value that's to be returned when the searched item is not present in the dictionary. In this case it would probably be 0.
http://docs.python.org/2/library/stdtypes.html#dict.get

Also, mildly interesting, the ẁ (U+1E81) in the [ẁebkitpy] tag in the title does not get reflected in the changelog.

[WebKit Commit Bot]

Comment on attachment 198048 [details]
Patch

Clearing flags on attachment: 198048

Committed r148429: <http://trac.webkit.org/changeset/148429>

[WebKit Commit Bot]

All reviewed patches have been landed.  Closing bug.