1 files changed, 152 insertions, 0 deletions
diff --git a/.config/nvim/lua/lang/rust.lua b/.config/nvim/lua/lang/rust.lua
new file mode 100644
index 0000000..8726059
--- /dev/null
+++ b/.config/nvim/lua/lang/rust.lua
@@ -0,0 +1,152 @@
+local M = {}
+
+M.config = function()
+  O.lang.rust = {
+    rust_tools = {
+      active = false,
+      parameter_hints_prefix = "<-",
+      other_hints_prefix = "=>", -- prefix for all the other hints (type, chaining)
+    },
+    -- @usage can be clippy
+    formatter = {
+      exe = "rustfmt",
+      args = { "--emit=stdout", "--edition=2018" },
+      stdin = true,
+    },
+    linter = "",
+    diagnostics = {
+      virtual_text = { spacing = 0, prefix = "" },
+      signs = true,
+      underline = true,
+    },
+  }
+end
+
+M.format = function()
+  O.formatters.filetype["rust"] = {
+    function()
+      return {
+        exe = O.lang.rust.formatter.exe,
+        args = O.lang.rust.formatter.args,
+        stdin = O.lang.rust.formatter.stdin,
+      }
+    end,
+  }
+
+  require("formatter.config").set_defaults {
+    logging = false,
+    filetype = O.formatters.filetype,
+  }
+end
+
+M.lint = function()
+  -- TODO: implement linters (if applicable)
+  return "No linters configured!"
+end
+
+M.lsp = function()
+  if require("utils").check_lsp_client_active "rust_analyzer" then
+    return
+  end
+
+  if O.lang.rust.rust_tools.active then
+    local opts = {
+      tools = { -- rust-tools options
+        -- automatically set inlay hints (type hints)
+        -- There is an issue due to which the hints are not applied on the first
+        -- opened file. For now, write to the file to trigger a reapplication of
+        -- the hints or just run :RustSetInlayHints.
+        -- default: true
+        autoSetHints = true,
+
+        -- whether to show hover actions inside the hover window
+        -- this overrides the default hover handler
+        -- default: true
+        hover_with_actions = true,
+
+        runnables = {
+          -- whether to use telescope for selection menu or not
+          -- default: true
+          use_telescope = true,
+
+          -- rest of the opts are forwarded to telescope
+        },
+
+        inlay_hints = {
+          -- wheter to show parameter hints with the inlay hints or not
+          -- default: true
+          show_parameter_hints = true,
+
+          -- prefix for parameter hints
+          -- default: "<-"
+          parameter_hints_prefix = O.lang.rust.rust_tools.parameter_hints_prefix,
+
+          -- prefix for all the other hints (type, chaining)
+          -- default: "=>"
+          other_hints_prefix = O.lang.rust.rust_tools.other_hints_prefix,
+
+          -- whether to align to the lenght of the longest line in the file
+          max_len_align = false,
+
+          -- padding from the left if max_len_align is true
+          max_len_align_padding = 1,
+
+          -- whether to align to the extreme right or not
+          right_align = false,
+
+          -- padding from the right if right_align is true
+          right_align_padding = 7,
+        },
+
+        hover_actions = {
+          -- the border that is used for the hover window
+          -- see vim.api.nvim_open_win()
+          border = {
+            { "╭", "FloatBorder" },
+            { "─", "FloatBorder" },
+            { "╮", "FloatBorder" },
+            { "│", "FloatBorder" },
+            { "╯", "FloatBorder" },
+            { "─", "FloatBorder" },
+            { "╰", "FloatBorder" },
+            { "│", "FloatBorder" },
+          },
+        },
+      },
+
+      -- all the opts to send to nvim-lspconfig
+      -- these override the defaults set by rust-tools.nvim
+      -- see https://github.com/neovim/nvim-lspconfig/blob/master/CONFIG.md#rust_analyzer
+      server = {
+        cmd = { DATA_PATH .. "/lspinstall/rust/rust-analyzer" },
+        on_attach = require("lsp").common_on_attach,
+      }, -- rust-analyser options
+    }
+    require("rust-tools").setup(opts)
+  else
+    require("lspconfig").rust_analyzer.setup {
+      cmd = { DATA_PATH .. "/lspinstall/rust/rust-analyzer" },
+      on_attach = require("lsp").common_on_attach,
+      filetypes = { "rust" },
+      root_dir = require("lspconfig.util").root_pattern("Cargo.toml", "rust-project.json"),
+    }
+  end
+
+  -- TODO: fix these mappings
+  vim.api.nvim_exec(
+    [[
+    autocmd Filetype rust nnoremap <leader>lm <Cmd>RustExpandMacro<CR>
+    autocmd Filetype rust nnoremap <leader>lH <Cmd>RustToggleInlayHints<CR>
+    autocmd Filetype rust nnoremap <leader>le <Cmd>RustRunnables<CR>
+    autocmd Filetype rust nnoremap <leader>lh <Cmd>RustHoverActions<CR>
+    ]],
+    true
+  )
+end
+
+M.dap = function()
+  -- TODO: implement dap
+  return "No DAP configured!"
+end
+
+return M