On Thu, Oct 19, 2023 at 01:46:36PM +0100, Conor Dooley wrote:
> On Thu, Oct 19, 2023 at 01:27:09PM +0100, Russell King (Oracle) wrote:
> > On Thu, Oct 19, 2023 at 12:58:46PM +0100, Conor Dooley wrote:
> > > On Thu, Oct 19, 2023 at 11:58:49AM +0100, Russell King (Oracle) wrote:
> > > > On Wed, Oct 18, 2023 at 01:11:45PM +0200, Linus Walleij wrote:
> > > > > On Wed, Oct 18, 2023 at 12:32 PM Rob Herring <robh@xxxxxxxxxx> wrote:
> > > > > > On Wed, 18 Oct 2023 11:03:40 +0200, Linus Walleij wrote:
> > > > >
> > > > > > > Bindings using dsa.yaml#/$defs/ethernet-ports specify that
> > > > > > > a DSA switch node need to have a ports or ethernet-ports
> > > > > > > subnode, and that is actually required, so add requirements
> > > > > > > using oneOf.
> > > > > > >
> > > > > > > Suggested-by: Rob Herring <robh@xxxxxxxxxx>
> > > > > > > Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
> > > > > > > ---
> > > > > > > Documentation/devicetree/bindings/net/dsa/dsa.yaml | 6 ++++++
> > > > > > > 1 file changed, 6 insertions(+)
> > > > > > >
> > > > > >
> > > > > > My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
> > > > > > on your patch (DT_CHECKER_FLAGS is new in v5.13):
> > > > > >
> > > > > > yamllint warnings/errors:
> > > > > > ./Documentation/devicetree/bindings/net/dsa/dsa.yaml:60:7: [warning] wrong indentation: expected 8 but found 6 (indentation)
> > > > > > ./Documentation/devicetree/bindings/net/dsa/dsa.yaml:62:7: [warning] wrong indentation: expected 8 but found 6 (indentation)
> > > > >
> > > > > Really?
> > > > >
> > > > > + oneOf:
> > > > > + - required:
> > > > > + - ports
> > > > > + - required:
> > > > > + - ethernet-ports
> > > > >
> > > > > Two spaces after the oneOf, 2 spaces after a required as usual.
> > > > > I don't get it.
Either way is valid. It's just 2 different common styles and I picked
the other way. The reason is to look different for a sequence vs.
mapping:
- required:
- ethernet-ports
- required:
ethernet-ports
It's easy to miss the missing '-'.
> > > > Given the other python errors spat out in Rob's report, I would suggest
> > > > that the "bot" is running a development version that hasn't been fully
> > > > tested, so anything it spits out is suspect. Maybe Rob can comment on
> > > > the validity of the warnings in the report.
> > >
> > > In this case, I think it is correct.
> > > 2 spaces for the oneOf, 2 spaces the start of the required for the
> > > nested list, so:
> > > oneOf:
> > > - required:
> >
> > This is a total of two spaces indentation.
> >
> > > - ports
> >
> > This is a total of six spaces indentation.
> >
> > You mention 2 spaces for the oneOf, which explains why the "- required"
> > needs to be indented by two spaces. You also say 2 spaces for the
> > required nested list, but what about the other two spaces?
>
> I a word that might've made it more clear.
> It is 2 spaces for the oneOf and 2 spaces _from_ the start of the
> required for the nested list.
Yes, 'oneOf' here is not a json-schema keyword, but a key under $defs
because it is indented.
'$defs' entries must be a schema/dict/mapping (json-schema/python/yaml
terms).
>
> In theory you might have a contrived example that looks like:
>
> oneOf:
> - required:
> - ports
> properties:
> ethernet-ports: false
>
> - required:
> - ethernet-ports
> properties:
> ports: false
>
> Maybe with that example you can see that each option of the oneOf
> contains a `required` and a `properties` component at 4 spaces of
> indent, and then in turn the required properties, being sub-components
> of `required` grow 2 more spaces for 6.
>
> > I guess if you're a YAML expert, this all makes sense, but to those of
> > us who aren't, these quirky "features" of it just seem totally
> > illogical.
Indentation being significant is not quirky. Languages choose either
indentation or brackets of some form. YAML uses one and JSON uses the
other.
> If I were a yaml expert, I would probably be able to use the correct
> terminology to explain this better, but hopefully the example is useful.
It has little to do with YAML other than indentation is *very*
significant in YAML. It's actually valid YAML. It's probably valid
json-schema, but questionable use in terms of how $defs is typically
used.
Anyways, I'm working on a fix for the meta-schema.
Rob
