[PATCH v8 4/8] env: Allow U-Boot scripts to be placed in a .env file
sjg at chromium.org
Tue Oct 19 18:24:25 CEST 2021
On Tue, 19 Oct 2021 at 10:20, Wolfgang Denk <wd at denx.de> wrote:
> Dear Simon,
> In message <CAPnjgZ1p6ueRhDsgBZGMXFhgv7UhRFA1UfvoHGGd0-136oTgvA at mail.gmail.com> you wrote:
> > But how do we handle this?
> > var+=fred
> > Is this appending to var or assigning to var+ ?
> It is assigning to "var+".
> > var++=fred
> > is unambiguous but very confusing. I think it would be better to disallow +
> It's neither unambiguous nor confusing. It is assigning to "var++".
What? Can you read that again?
> I think we should not change what is old and might be in use.
> It is much easier to change what is new and can be defined at will.
> If we define for example that "<name>=+<value>" appends, then we can
> also define our own escape rules, for example:
> var=fred assigns
> var=+fred appends "fred"
> var=\+fred assignes the value "+fred"
> var=++fred appends "+fred"
I don't like that at all. It requires an escape for a common case and
is very confusing.
Since people will be converting their out-of-tree scripts anyway, they
can check for this sort of madness at the time. There should be no
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