[OE-core] FETCHCMD drop breaks build when append is used (from patch b259bd31eb)

[Adrian Bunk]

On Fri, Aug 30, 2019 at 07:40:51AM -0700, Andre McCurdy wrote:
> On Fri, Aug 30, 2019 at 3:08 AM Andrey Zhizhikin <andrey.z at gmail.com> wrote:
>...
> > This patch would also break several other recipes which are using
> > appends to FETCHCMD, for example for FETCHCMD_wget the libedit would
> > fail since it appends the wget to use different User-Agent.
> >
> > I've copied Raj here since he introduced this recipe in the form it is
> > and would definitely break.
> >
> > Can you please have a look at this and advise on how one can continue
> > to use the FETCHCMD appends for the future?
> 
> One answer could be that modifications of the fetcher command lines
> should be done by completely defining them rather than appending. I'm
> not sure how reasonable that is though.
> 
> In the end the approach to fixing this depends on whether appending to
> the default fetcher commands is considered valid usage or not... and I
> don't know the answer to that.
>...

Disallowing appends could cause huge problems for a user or layer that 
has to append local options (e.g. proxy) building a recipe like libedit 
that has to change the User-Agent.

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed