Add support for reStructuredText (helix-editor#6180)

book/src/generated/lang-support.md

@@ -114,6 +114,7 @@
 | rescript | ✓ | ✓ |  | `rescript-language-server` |
 | rmarkdown | ✓ |  | ✓ | `R` |
 | ron | ✓ |  | ✓ |  |
+| rst | ✓ |  |  |  |
 | ruby | ✓ | ✓ | ✓ | `solargraph` |
 | rust | ✓ | ✓ | ✓ | `rust-analyzer` |
 | sage | ✓ | ✓ |  |  |

languages.toml

@@ -2244,3 +2244,14 @@ indent = { tab-width = 8, unit = "        " }
 [[grammar]]
 name = "nasm"
 source = { git = "https://github.com/naclsn/tree-sitter-nasm", rev = "a0db15db6fcfb1bf2cc8702500e55e558825c48b" }
+
+[[language]]
+name = "rst"
+scope = "source.rst"
+comment-token = ".."
+file-types = ["rst"]
+roots = []
+
+[[grammar]]
+name = "rst"
+source = { git = "https://github.com/stsewd/tree-sitter-rst", rev = "25e6328872ac3a764ba8b926aea12719741103f1" }

runtime/queries/rst/highlights.scm

@@ -0,0 +1,38 @@
+(comment) @comment
+
+[
+  (title)
+] @markup.heading.1
+
+[
+  "adornment"
+] @markup.heading.marker
+
+[
+  (target)
+  (reference)
+] @markup.link.url
+
+[
+  "bullet"
+] @markup.list.unnumbered
+
+(strong) @markup.bold
+(emphasis) @markup.italic
+(literal) @markup.raw.inline
+
+(list_item
+  (term) @markup.bold
+  (classifier)? @markup.italic)
+
+(directive
+  [".." (type) "::"] @function
+)
+
+(field
+  [":" (field_name) ":"] @variable.other.member
+)
+
+(interpreted_text) @markup.raw.inline
+
+(interpreted_text (role)) @keyword