Feature request - Quote-type single should allow double-quoted strings with escape sequences

[o-l-a-v]

Feature request

Yamllint has the same issue:

• 2023-11-17: quote-type: single should (maybe?) allow double-quoted strings with escape sequences adrienverge/yamllint#609
• 2025-05-08: allow double quotes for continuation, even if quote-type is ‘single’ adrienverge/yamllint#753

And unmerged suggestions for a fix:

• 2025-09-15: quoted-strings: Add allow-double-quotes-for-escaping adrienverge/yamllint#777

Would be neat if ryl added support for this. :)

Reproduce

Sample config TOML:

[rules]
trailing-spaces = "enable"
[rules.quoted-strings]
quote-type = "single"
required = "only-when-needed"

Sample YAML:

---
# Ref: https://yamlscript.org/blog/2025-07-20/yaml-best-practices/
test:
  should-be-unquoted:
    - "double quotes"
    - 'single quotes'
  should-be-changed-to-single-quote:
    - "{double quote}"
  should-remain-double-quote:
    - "double\nquote"

Output from ryl v0.6.0:

PS > ryl "C:\Users\<redacted>\OneDrive\IT\Code\YAML\yaml string quoting test.yml" --config-file "C:\Users\<redacted>\OneDrive\IT\Code\.config\ryl.toml"
C:\Users\<redacted>\OneDrive\IT\Code\YAML\yaml string quoting test.yml
  5:7       error    string value is redundantly quoted with single quotes  (quoted-strings)
  6:7       error    string value is redundantly quoted with single quotes  (quoted-strings)
  8:7       error    string value is redundantly quoted with single quotes  (quoted-strings)
  10:7      error    string value is not quoted with single quotes  (quoted-strings)

PS > ryl --version
ryl 0.6.0
PS >

[owenlamont]

Thanks for raising, yeah I was keen to look for any open yamllint issues that were frustrating it's user I could potentially solve to grow adoption of ryl.

I'll try to look into this within a week or so.

[o-l-a-v]

Hi @owenlamont.

With this config:

[rules]
trailing-spaces = "enable"
[rules.quoted-strings]
quote-type = "single"
required = "only-when-needed"

And this example YAML:

---
# Ref: https://yamlscript.org/blog/2025-07-20/yaml-best-practices/
test:
  should-be-unquoted:
    - "double quotes"
    - 'single quotes'
  should-be-changed-to-single-quote:
    - "{double quote}"
  should-remain-double-quote:
    - "double\nquote"

I'd expect ryl v0.9.2 to detect the three first cases?

PS > uvx ryl ".\YAML\yaml string quoting test.yml"
PS > uvx ryl --version                            
ryl 0.9.2
PS >

[owenlamont]

Oh... weird, I did mainly test the auto fixes. Might have neglected the no fix option. I'll check this. Thanks for raising!

[owenlamont]

Hi @o-l-a-v

I suspect a config discover problem - but also you need:

allow-double-quotes-for-escaping = true

In your config.

Also is your config in a ryl.toml / .ryl.toml in the same directory or higher parent relative to yaml string quoting test.yml? If not you have to pass the --config-file option with the path to your config file.

[o-l-a-v]

Config is located in ./.config/ryl.toml.

Config now looks like this:

# ryl is a Rust reimplementation of yamllint
# * yamllint documentation: <https://yamllint.readthedocs.io/en/stable/>
# Schema: https://raw.githubusercontent.com/owenlamont/ryl/refs/heads/main/ryl.toml.schema.json
#:schema https://raw.githubusercontent.com/owenlamont/ryl/refs/heads/main/ryl.toml.schema.json
# $schema: https://raw.githubusercontent.com/owenlamont/ryl/refs/heads/main/ryl.toml.schema.json

[rules]
trailing-spaces = "enable"
[rules.quoted-strings]
allow-double-quotes-for-escaping = true
quote-type = "single"
required = "only-when-needed"

Made no difference.

[owenlamont]

🤔

Just to be real sure can you pass the full absolute path to your config file via --config-file like you did in the original description of this issue?

[o-l-a-v]

PS > ryl '.\YAML\yaml string quoting test.yml' --config-file '.\.config\ryl.toml'
.\YAML\yaml string quoting test.yml
  5:7       error    string value is redundantly quoted with single quotes  (quoted-strings)
  6:7       error    string value is redundantly quoted with single quotes  (quoted-strings)
  8:7       error    string value is not quoted with single quotes  (quoted-strings)

PS >

Success.

Sorry, I thought .config/ was supported.