On 10/04/2016 03:10 PM, Nick Coghlan wrote:
On 3 October 2016 at 23:36, Tomas Orsava <tors...@redhat.com> wrote:
On 09/27/2016 08:43 AM, Nick Coghlan wrote:
P.P.S. I realize rh-python34 is available on RHSCL, but it didn't seem to
support "python3" in scripts...
Script shebang lines can be supported via SCLs, but they need to run a
wrapper script that implicitly enables the SCL, rather than just being
a symlink to the SCL's Python executable. I don't recall the exact
incantation myself, but hopefully someone else will be able to chime
in with that.
Right now you need to create and use a wrapper script that contains:
#!/bin/bash
/usr/bin/scl enable rh-python34 -- python3 "$@"
However, when this BZ [0] gets into RHEL 7.4 (there's also talk of 7.3
Z-stream), you'll be able to enable the collection right in the shebang like
so:
#!/usr/bin/scl enable rh-python34 -- python3
Nice. Would that come with a corresponding update to the pip and
setuptools versions in RHSCL such that their wrapper script generators
did the right thing?
I bring that up, as one of the other challenges with the way SCLs
currently work is that the upstream convention of copying
"sys.executable" into the shebang to generate a script that runs in
the current Python doesn't work as expected.
That would be cool, but it's not planned as of yet. Maybe we should
create an RFE for it?
Tomas
Cheers,
Nick.
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