[Slackbuilds-users] Possible typo in python3.SlackBuild
chris.willing at iinet.net.au
Sat Jan 10 04:18:20 UTC 2015
On 01/10/2015 04:45 AM, Audrius Kažukauskas wrote:
> On Fri, 2015-01-09 at 13:34:03 -0400, Jim Diamond wrote:
>> On Fri, Jan 9, 2015 at 17:09 (+1000), Christoph Willing wrote:
>>> On 01/09/2015 04:35 PM, Niki Kovacs wrote:
>>>> I just noticed a strange line in python3.SlackBuild:
>>>> I only know this kind of notation:
>>>> Is this an error or some special syntax I don't know?
>>> From the Parameter Expansion section of the bash manpage:
>>> Substring Expansion. Expands to up to length characters of the
>>> value of parameter starting at the character specified by off-set.
>>> Its not stated there but I presume a blank offset defaults it to 0,
>>> therefore for a VERSION of 3.4.2, PYVER would be set to 3.4
>> That is fragile code. If VERSION got as high as 3.10.x, Bad Things
>> would happen.
> Agreed, although very unlikely, according to one of Python
> My current expectation is that Python 4.0 will merely be "the release
> that comes after Python 3.9". <...>
> At the current rate of language feature releases (roughly every 18
> months), that means we would likely see Python 4.0 some time in 2023,
> rather than seeing Python 3.10.
> But I'm still going to future-proof the code by changing the offending
> line to
> PYVER=$(cut -d. -f1,2 <<< "$VERSION")
> unless someone has a better suggestion.
That would work but, just for fun, also:
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