Add treesitter AST semantic highlighting

home/.config/nvim/lua/plugins/settings/polyglot.lua

@@ -1,8 +0,0 @@
-local vim = require("vim")
-local g = vim.g
-
--- Disable polyglot's "sensible" settings, while there are some nice things it
--- does, I set these manually in my default config and I don't like depending
--- on single plugin for so many things, doing it manually doing it manually is
--- also more explicit making it obvious what's happening
-g.polyglot_disabled = {'sensible'}

home/.config/nvim/lua/plugins/settings/treesitter.lua

@@ -0,0 +1,28 @@
+local vim = require("vim")
+local g = vim.g
+
+-- Enable treesitter highlight for all languages
+require'nvim-treesitter.configs'.setup {
+    -- Always automatically install parsers for these languages
+    ensure_installed = {
+        "bash", "python", "lua", "rust", "go", "haskell",
+        "c", "cpp", "cmake", "c_sharp", "java", "dockerfile",
+        "json", "toml", "yaml", "regex", "vim", "html", "css",
+        "typescript", "javascript",
+    },
+    highlight = {
+        enable = true,
+        -- Setting this to true will run `:h syntax` and tree-sitter at the same time.
+        -- Set this to `true` if you depend on 'syntax' being enabled (like for indentation).
+        -- Using this option may slow down your editor, and you may see some duplicate highlights.
+        -- Instead of true it can also be a list of languages
+        additional_vim_regex_highlighting = false,
+  },
+}
+
+-- Use git instead of curl for downloading parsers
+require("nvim-treesitter.install").prefer_git = true
+
+-- Use treesitter for syntax-aware folding
+g.foldmethod = "expr"
+g.foldexpr = "nvim_treesitter#foldexpr()"