Add Astro language support

Register Astro files with the bundled tree-sitter parser, language detection, LSP, and Prettier plugin formatter metadata.

Fixes #720

Author: mehmetozguldev

bun.lock

@@ -0,0 +1,32 @@
+{
+  "$schema": "https://athas.dev/schemas/extension.json",
+  "id": "athas.astro",
+  "name": "Astro",
+  "displayName": "Astro",
+  "version": "1.0.0",
+  "description": "Astro language support with LSP and formatting",
+  "publisher": "Athas",
+  "categories": ["Language"],
+  "languages": [
+    {
+      "id": "astro",
+      "extensions": [".astro"],
+      "aliases": ["Astro"]
+    }
+  ],
+  "capabilities": {
+    "lsp": {
+      "name": "astro-ls",
+      "runtime": "bun",
+      "package": "@astrojs/language-server",
+      "args": ["--stdio"]
+    },
+    "formatter": {
+      "name": "prettier",
+      "runtime": "bun",
+      "package": "prettier",
+      "packages": ["prettier-plugin-astro"],
+      "args": ["--plugin", "prettier-plugin-astro", "--stdin-filepath", "${file}"]
+    }
+  }
+}

extensions/official/astro/extension.json

@@ -0,0 +1,12 @@
+(tag_name) @tag
+(erroneous_end_tag_name) @tag.error
+(doctype) @constant
+(attribute_name) @attribute
+(attribute_value) @string
+(comment) @comment
+
+[
+  "<"
+  ">"
+  "</"
+] @punctuation.bracket

extensions/official/astro/highlights.scm

@@ -131,6 +131,7 @@
     "concurrently": "^10.0.3",
     "simple-git-hooks": "^2.13.1",
     "tailwindcss": "^4.3.1",
+    "tree-sitter-astro": "github:virchau13/tree-sitter-astro",
     "tree-sitter-bash": "^0.25.1",
     "tree-sitter-c": "^0.24.1",
     "tree-sitter-c-sharp": "^0.23.5",

package.json

@@ -0,0 +1,12 @@
+(tag_name) @tag
+(erroneous_end_tag_name) @tag.error
+(doctype) @constant
+(attribute_name) @attribute
+(attribute_value) @string
+(comment) @comment
+
+[
+  "<"
+  ">"
+  "</"
+] @punctuation.bracket

public/tree-sitter/parsers/astro/highlights.scm

@@ -57,6 +57,7 @@ interface ParserSource {
 
 // All bundled parsers — built from source using tree-sitter-cli.
 const BUNDLED_PARSERS: Record<string, ParserSource> = {
+  astro: { package: "tree-sitter-astro" },
   bash: { package: "tree-sitter-bash" },
   c: { package: "tree-sitter-c" },
   c_sharp: { package: "tree-sitter-c-sharp" },

public/tree-sitter/parsers/astro/parser.wasm

@@ -80,6 +80,12 @@ describe("extension-assets", () => {
       wasmPath: "/tree-sitter/parsers/elisp/parser.wasm",
       highlightQueryUrl: "/tree-sitter/parsers/elisp/highlights.scm",
     });
+    expect(getLanguageAssetConfig("astro")).toMatchObject({
+      parserLanguageId: "astro",
+      queryLanguageId: "astro",
+      wasmPath: "/tree-sitter/parsers/astro/parser.wasm",
+      highlightQueryUrl: "/tree-sitter/parsers/astro/highlights.scm",
+    });
   });
 
   it("prefers registered manifest asset URLs", () => {

scripts/postinstall.ts

@@ -68,6 +68,7 @@ describe("getLanguageIdFromPath", () => {
     expect(getLanguageIdFromPath("/tmp/message.proto")).toBe("protobuf");
     expect(getLanguageIdFromPath("/tmp/query.ql")).toBe("ql");
     expect(getLanguageIdFromPath("/tmp/main.tf")).toBe("terraform");
+    expect(getLanguageIdFromPath("/tmp/page.astro")).toBe("astro");
     expect(getLanguageIdFromPath("/tmp/icon.svg")).toBe("xml");
     expect(getLanguageIdFromPath("/tmp/project.csproj")).toBe("xml");
     expect(getLanguageDisplayName("diff")).toBe("Diff");
@@ -78,6 +79,7 @@ describe("getLanguageIdFromPath", () => {
     expect(getLanguageDisplayName("r")).toBe("R");
     expect(getLanguageDisplayName("rmarkdown")).toBe("R Markdown");
     expect(getLanguageDisplayName("jupyter-notebook")).toBe("Jupyter Notebook");
+    expect(getLanguageDisplayName("astro")).toBe("Astro");
   });
 
   it("maps Monaco-highlighted extensions to registered Monaco language ids", () => {

src/features/editor/tests/extension-assets.test.ts

@@ -68,6 +68,7 @@ export function detectLanguageFromPath(filePath: string): string {
     lua: "lua",
     vim: "vim",
     elm: "elm",
+    astro: "astro",
   };
 
   return languageMap[extension] || "text";