9e538e7916
With https://github.com/zed-industries/zed/pull/6882 basic syntax highlighting support for Terraform has arrived in Zed. To fully support all features of the language server (when it lands), it's necessary to handle `*.tfvars` slightly differently. TL;DR: [terraform-ls](https://github.com/hashicorp/terraform-ls) expects `terraform` as language id for `*.tf` files and `terraform-vars` as language id for `*.tfvars` files because the allowed configuration inside the files is different. Duplicating the Terraform language configuration was the only way I could see to achieve this. --- In the [LSP](https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#textDocumentItem), text documents have a language identifier to identify a document on the server side to avoid reinterpreting the file extension. The Terraform language server currently uses two different language identifiers: * `terraform` - for `*.tf` files * `terraform-vars` - for `*.tfvars` files Both file types contain HCL and can be highlighted using the same grammar and tree-sitter configuration files. The difference in the file content is that `*.tfvars` files only allow top-level attributes and no blocks. [_So you could argue that `*.tfvars` can use a stripped down version of the grammar_]. To set the right context (which affects completion, hover, validation...) for each file, we need to send a different language id. The only way I could see to achieve this with the current architecture was to copy the Terraform language configuration with a different `name` and different `path_suffixes`. Everything else is the same. A Terraform LSP adapter implementation would then map the language configurations to their specific language ids: ```rust fn language_ids(&self) -> HashMap<String, String> { HashMap::from_iter([ ("Terraform".into(), "terraform".into()), ("Terraform Vars".into(), "terraform-vars".into()), ]) } ``` I think it might be helpful in the future to have another way to map file extensions to specific language ids without having to create a new language configuration. ### UX Before  ### UX After  Release Notes: - N/A --- * Part of https://github.com/zed-industries/zed/issues/5098 |
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