Add support for an optional `format` field in external ruleset
definitions so Clash/Mihomo rule-providers can declare their source
format explicitly.
Previously, `type = "clash-domain"`, `type = "clash-ipcidr"`, and
`type = "clash-classic"` only described the provider behavior, while the
provider format was implicitly left as the Clash/Mihomo default YAML
format. This worked for YAML rule-provider files with a top-level
`payload` field, but failed for valid text-format providers such as
domainset files that contain plain domain entries without a `payload`
wrapper.
This change allows users to configure:
[[rulesets]]
group = "Apple CDN"
ruleset = "https://ruleset.skk.moe/Clash/domainset/apple_cdn.txt"
type = "clash-domain"
format = "text"
The generated rule-provider will now include:
format: text
Supported values are:
yaml
text
mrs
The new `format` option is only accepted for Clash/Mihomo native
rule-provider types:
clash-domain
clash-ipcidr
clash-classic
For compatibility, omitting `format` preserves the previous behavior and
does not emit a `format` field, allowing Clash/Mihomo to continue using
its default YAML format.
Validation is also added to reject unsupported format values and to
prevent `format = "mrs"` from being used with `clash-classic`, since MRS
rule-sets only support domain and IP-CIDR behaviors.
Chi Zhang