[Scons-dev] SCons 3.0, sconsign files and Py2 vs Py3.. how to handle sconsign imcompatabilities

[Bill Deegan]

One thought would be to allow annotating the function with a specified
csig. and/or version #.
This would help (at least) for internal action functions (built in to
scons).

On Mon, Sep 11, 2017 at 10:23 AM, Tim Jenness <tjenness at lsst.org> wrote:

>
> > On Sep 11, 2017, at 06:24, Bill Deegan <bill at baddogconsulting.com>
> wrote:
> >
> > Likely the rebuild py2 vs py3 is the action signature for functions now
> uses the bytecode. The bytecode is different between py2 and py3.
> >
> > Previously it was either pickling the function (which didn't adequately
> check for changes in the python functions), or dumping the string
> representation :
> > <function a at 0x10e88fc80>
> > For example.
> >
> >
>
> Sounds like this can’t be solved then. Release v3.0 with pickle 2 and tell
> people there will be rebuilding if you flit between versions.
>
> —
> Tim Jenness
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