Re: A brief look at deprecating our JSON extensions over RFC 8259

[Paolo Bonzini]

On 22/02/21 16:24, Daniel P. Berrangé wrote:
> This problem isn't unique to QEMU. Any app using JSON from the
> shell will have the tedium of quote escaping. JSON is incredibly
> widespread and no other apps felt it neccessary to introduce single
> quoting support, because the benefit doesn't outweigh the interop
> problem it introduces.

The quotes were introduced for C code (and especially qtest), not for 
the shell.  We have something like

    response = qmp("{ 'execute': 'qom-get', 'arguments': { 'path': %s, "
                   "'property': 'temperature' } }", id);

These are sent to QEMU as double-quoted strings (the single-quoted JSON 
is parsed to get interpolation and printed back; commit 563890c7c7, 
"libqtest: escape strings in QMP commands, fix leak", 2014-07-01). 
However, doing the interpolation requires a parser that recognizes the 
single-quoted strings.

Markus, did you rebuild the qtests after disabling single-quoted 
strings?  "make check-qtest-x86_64" would have rebuilt them, but I'm 
confused by the results.

Paolo