feat(core): support filetype syntax and lsp

Add a compiled Tree-sitter language registry for common file types and select highlighting by buffer extension.

Extend LSP configuration with document selectors while preserving existing single-language server configs.

Author: fcoury

Cargo.lock

@@ -30,9 +30,15 @@ textwrap = "0.16"
 thiserror = "1.0"
 tokio = { version = "1.41.0", features = ["full"] }
 toml = "0.8.10"
-tree-sitter = "0.20.10"
-tree-sitter-rust = "0.20.4"
+tree-sitter = "0.25"
+tree-sitter-javascript = "0.25.0"
+tree-sitter-json = "0.24.8"
+tree-sitter-md = "0.5.3"
+tree-sitter-python = "0.25.0"
+tree-sitter-rust = "0.24.2"
+tree-sitter-toml-ng = "0.7.0"
+tree-sitter-typescript = "0.23.2"
+tree-sitter-yaml = "0.7.2"
 unicode-segmentation = "1.12.0"
 unicode-width = "0.2"
 uuid = { version = "1.12.0", features = ["v4"] }
-

Cargo.toml

@@ -89,12 +89,26 @@ cursor_line = true
 [lsp]
 enabled = true
 
+# Built-in syntax highlighting covers Rust, Markdown, JavaScript,
+# TypeScript/TSX, JSON, TOML, YAML, and Python. LSP defaults are provided for
+# those file types and start only when a matching file is opened.
+
 [lsp.servers.typescript]
 command = "typescript-language-server"
 args = ["--stdio"]
+root_markers = ["package.json", "tsconfig.json", "jsconfig.json", ".git"]
+
+[[lsp.servers.typescript.documents]]
 language_id = "typescript"
-file_extensions = ["ts", "tsx"]
-root_markers = ["package.json", ".git"]
+file_extensions = ["ts"]
+
+[[lsp.servers.typescript.documents]]
+language_id = "typescriptreact"
+file_extensions = ["tsx"]
+
+[[lsp.servers.typescript.documents]]
+language_id = "javascript"
+file_extensions = ["js", "mjs", "cjs"]
 
 # Plugin settings
 [plugins]

README.md

@@ -24,6 +24,32 @@ log_file = "/tmp/red.log"
 # them.
 #show_diagnostics = false 
 
+# Language servers are selected by file extension. The built-in defaults cover
+# Rust, Markdown, JavaScript/TypeScript, JSON, TOML, YAML, and Python. You can
+# override or add servers here. Existing single-language configs still work:
+#
+# [lsp.servers.rust]
+# command = "rust-analyzer"
+# args = ["-v"]
+# language_id = "rust"
+# file_extensions = ["rs"]
+# root_markers = ["Cargo.toml", ".git"]
+#
+# Servers that handle multiple language ids can use document selectors:
+#
+# [lsp.servers.typescript]
+# command = "typescript-language-server"
+# args = ["--stdio"]
+# root_markers = ["package.json", "tsconfig.json", "jsconfig.json", ".git"]
+#
+# [[lsp.servers.typescript.documents]]
+# language_id = "typescript"
+# file_extensions = ["ts"]
+#
+# [[lsp.servers.typescript.documents]]
+# language_id = "javascript"
+# file_extensions = ["js", "mjs", "cjs"]
+
 [keys.insert]
 Enter = "InsertNewLine"
 Backspace = "DeletePreviousChar"