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Touch up docs for adding new language (#1002)

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Gokul Soumya 2021-11-08 06:22:51 +05:30 committed by GitHub
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19
book/src/guides/adding_languages.md
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@ -2,13 +2,14 @@ # Adding languages
## Submodules ## Submodules
To add a new langauge, you should first add a tree-sitter submodule. To do this, you can run the command To add a new langauge, you should first add a tree-sitter submodule. To do this,
you can run the command
```sh ```sh
$ git submodule add -f <repository> helix-syntax/languages/tree-sitter-<name> git submodule add -f <repository> helix-syntax/languages/tree-sitter-<name>
``` ```
For example, to add tree-sitter-ocaml you would run For example, to add tree-sitter-ocaml you would run
```sh ```sh
$ git submodule add -f https://github.com/tree-sitter/tree-sitter-ocaml helix-syntax/languages/tree-sitter-ocaml git submodule add -f https://github.com/tree-sitter/tree-sitter-ocaml helix-syntax/languages/tree-sitter-ocaml
``` ```
Make sure the submodule is shallow by doing Make sure the submodule is shallow by doing
```sh ```sh
@ -19,7 +20,10 @@ ## Submodules
## languages.toml ## languages.toml
Next, you need to add the language to the `languages.toml` found in the root of the repository; this `languages.toml` file is included at compilation time, and is distinct from the `language.toml` file in the user's [configuration directory](../configuration.md). Next, you need to add the language to the [`languages.toml`][languages.toml] found in the root of
the repository; this `languages.toml` file is included at compilation time, and
is distinct from the `language.toml` file in the user's [configuration
directory](../configuration.md).
These are the available keys and descriptions for the file. These are the available keys and descriptions for the file.
@ -27,7 +31,7 @@ ## languages.toml
| ---- | ----------- | | ---- | ----------- |
| name | The name of the language | | name | The name of the language |
| scope | A string like `source.js` that identifies the language. Currently, we strive to match the scope names used by popular TextMate grammars and by the Linguist library. Usually `source.<name>` or `text.<name>` in case of markup languages | | scope | A string like `source.js` that identifies the language. Currently, we strive to match the scope names used by popular TextMate grammars and by the Linguist library. Usually `source.<name>` or `text.<name>` in case of markup languages |
| injection-regex | regex pattern that will be tested against a language name in order to determine whether this language should be used for a potential language injection site. [link](https://tree-sitter.github.io/tree-sitter/syntax-highlighting#language-injection) | | injection-regex | regex pattern that will be tested against a language name in order to determine whether this language should be used for a potential [language injection][treesitter-language-injection] site. |
| file-types | The filetypes of the language, for example `["yml", "yaml"]` | | file-types | The filetypes of the language, for example `["yml", "yaml"]` |
| roots | A set of marker files to look for when trying to find the workspace root. For example `Cargo.lock`, `yarn.lock` | | roots | A set of marker files to look for when trying to find the workspace root. For example `Cargo.lock`, `yarn.lock` |
| auto-format | Whether to autoformat this language when saving | | auto-format | Whether to autoformat this language when saving |
@ -43,10 +47,13 @@ ## Common Issues
- If you get errors when building after switching branches, you may have to remove or update tree-sitter submodules. You can update submodules by running - If you get errors when building after switching branches, you may have to remove or update tree-sitter submodules. You can update submodules by running
```sh ```sh
$ git submodule sync; git submodule update --init git submodule sync; git submodule update --init
``` ```
- Make sure to not use the `--remote` flag. To remove submodules look inside the `.gitmodules` and remove directories that are not present inside of it. - Make sure to not use the `--remote` flag. To remove submodules look inside the `.gitmodules` and remove directories that are not present inside of it.
- If a parser is segfaulting or you want to remove the parser, make sure to remove the submodule *and* the compiled parser in `runtime/grammar/<name>.so` - If a parser is segfaulting or you want to remove the parser, make sure to remove the submodule *and* the compiled parser in `runtime/grammar/<name>.so`
- The indents query is `indents.toml`, *not* `indents.scm`. See [this](https://github.com/helix-editor/helix/issues/114) issue for more information. - The indents query is `indents.toml`, *not* `indents.scm`. See [this](https://github.com/helix-editor/helix/issues/114) issue for more information.
[treesitter-language-injection]: https://tree-sitter.github.io/tree-sitter/syntax-highlighting#language-injection
[languages.toml]: https://github.com/helix-editor/helix/blob/master/languages.toml

2
book/src/guides/textobject.md
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@ -5,7 +5,7 @@ # Adding Textobject Queries
to work properly. Tree-sitter allows us to query the source code syntax tree to work properly. Tree-sitter allows us to query the source code syntax tree
and capture specific parts of it. The queries are written in a lisp dialect. and capture specific parts of it. The queries are written in a lisp dialect.
More information on how to write queries can be found in the [official tree-sitter More information on how to write queries can be found in the [official tree-sitter
documentation](tree-sitter-queries). documentation][tree-sitter-queries].
Query files should be placed in `runtime/queries/{language}/textobjects.scm` Query files should be placed in `runtime/queries/{language}/textobjects.scm`
when contributing. Note that to test the query files locally you should put when contributing. Note that to test the query files locally you should put