[languages] contribution point languages provide the ability to extends

[yiliang114]

Type: Feature Request

Sometimes we want to redefine a language to match specific file suffixes. But I also want to directly reuse the grammar and lexical files of some existing language.

For example, I want to recognize all files ending in .sh as a new language and call it shellscript1, but I am not prepared to provide grammar files and lexical files for shellscript1 language, because in fact its configuration is exactly the same asshellscript, I just want to have a new language, which may not be the category of aliases.

The contribution point is roughly configured like this

      {
        "id": "shellscript1",
        "extend": "shellscript",
        "aliases": [
          "shell"
        ],
        "extensions": [
          ".sh"
        ]
      }

VS Code version: Code 1.84.1 (Universal) (2b35e1e, 2023-11-06T12:37:18.666Z)
OS version: Darwin x64 21.3.0
Modes:

[vscodenpa]

Thanks for creating this issue! It looks like you may be using an old version of VS Code, the latest stable release is 1.84.2. Please try upgrading to the latest version and checking whether this issue remains.

Happy Coding!

[FlorentP42]

Gathering interest for Shell Script auto-indent: #199003