Syntax for opam-repositories ?

[fblanqui]

Hello. Could you please describe the syntax to use for opam-repositories, and give some examples?

[smorimoto]

It's expected to be the YAML mapping: https://yaml.org/spec/1.2.2/#nodes

default: https://github.com/ocaml/opam-repository.git

or

default: https://github.com/ocaml/opam-repository.git
beta: https://github.com/ocaml/ocaml-beta-repository.git

[fblanqui]

I see. Thank you. Is https://github.com/ocaml/opam-repository.git used even if not mentioned?

[fblanqui]

Note that in README.md it is written that it is of type string, which is a little confusing (I'm not super familiar with yaml).

[smorimoto]

Is https://github.com/ocaml/opam-repository.git used even if not mentioned?

Yes, it's the default opam repository.

Note that in README.md it is written that it is of type string, which is a little confusing (I'm not super familiar with yaml).

Although it's actually technically just string, because of GHA restrictions, its actual content is the YAML mapping...

[fblanqui]

Sorry but I still have some syntactic issue: "A mapping was not expected". What is wrong with the following?

      - name: Install ocaml and opam
        uses: ocaml/setup-ocaml@v2
        with:
          ocaml-compiler: 4.14.0
          opam-repositories:
            default: https://github.com/ocaml/opam-repository.git
            beta: https://github.com/ocaml/ocaml-beta-repository.git

[smorimoto]

Try this:

       - name: Install ocaml and opam
         uses: ocaml/setup-ocaml@v2
         with:
           ocaml-compiler: 4.14.0
-          opam-repositories:
+          opam-repositories: |
             default: https://github.com/ocaml/opam-repository.git
             beta: https://github.com/ocaml/ocaml-beta-repository.git

[fblanqui]

It works. Thank you!

[smorimoto]

Note that, in general, you do not have to add or change the repository. Addition, the higher item has higher priority.