added rust-tools thanks to bob3000 (#544)

* added rust-tools

* require_plugin has been removed

init.lua

@@ -35,7 +35,10 @@ if O.lang.lua.active then require('lsp.lua-ls') end
 if O.lang.php.active then require('lsp.php-ls') end
 if O.lang.python.active then require('lsp.python-ls') end
 if O.lang.ruby.active then require('lsp.ruby-ls') end
-if O.lang.rust.active then require('lsp.rust-ls') end
+if O.lang.rust.active then
+    require('lsp.rust-ls')
+    require('lv-rust-tools')
+end
 if O.lang.svelte.active then require('lsp.svelte-ls') end
 if O.lang.terraform.active then require('lsp.terraform-ls') end
 if O.lang.tailwindcss.active then require('lsp.tailwindcss-ls') end

lua/default-config.lua

@@ -163,7 +163,17 @@ O = {
         vim = {active = false},
         yaml = {active = false},
         terraform = {active = false},
-        rust = {active = false},
+        rust = {
+            active = false,
+            linter = '',
+            formatter = '',
+            autoformat = false,
+            diagnostics = {
+                virtual_text = {spacing = 0, prefix = ""},
+                signs = true,
+                underline = true
+            }
+        },
         svelte = {active = false},
         php = {active = false},
         latex = {active = false},

lua/lsp/rust-ls.lua

@@ -1,5 +1,6 @@
-require'lspconfig'.rust_analyzer.setup{
-    cmd = {DATA_PATH .. "/lspinstall/rust/rust-analyzer"},
-    on_attach = require'lsp'.common_on_attach
-}
+-- the rust-tools plugin will configure this automatically
+--require'lspconfig'.rust_analyzer.setup{
+--    cmd = {DATA_PATH .. "/lspinstall/rust/rust-analyzer"},
+--    on_attach = require'lsp'.common_on_attach
+--}
 

lua/lv-autocommands/init.lua

@@ -28,6 +28,9 @@ if O.lang.ruby.autoformat then table.insert(auto_formatters, ruby_format) end
 local go_format = {'BufWritePre', '*.go', 'lua vim.lsp.buf.formatting_sync(nil,1000)'}
 if O.lang.go.autoformat then table.insert(auto_formatters, go_format) end
 
+local rust_format = {'BufWritePre', '*.rs', 'lua vim.lsp.buf.formatting_sync(nil,1000)'}
+if O.lang.rust.autoformat then table.insert(auto_formatters, rust_format) end
+
 utils.define_augroups({
     _general_settings = {
         {'TextYankPost', '*', 'lua require(\'vim.highlight\').on_yank({higroup = \'Search\', timeout = 200})'},

lua/lv-rust-tools/init.lua

@@ -0,0 +1,85 @@
+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 = "<-",
+
+            -- prefix for all the other hints (type, chaining)
+            -- default: "=>"
+            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)
+
+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)
+
+

lua/plugins.lua

@@ -330,6 +330,12 @@ return require("packer").startup(function(use)
         requires = 'nvim-lua/plenary.nvim'
 
     }
+    -- Rust tools
+    -- TODO: use lazy loading maybe?
+    use {
+        "simrat39/rust-tools.nvim",
+        disable = not O.lang.rust.active
+    }
     -- Lazygit
     use {
         "kdheepak/lazygit.nvim",

lv-config.lua

@@ -80,6 +80,9 @@ O.lang.ruby.autoformat = true
 
 -- go
 O.lang.go.autoformat = true
+
+-- rust
+O.lang.rust.autoformat = true
 -- create custom autocommand field (This would be easy with lua)
 
 -- Turn off relative_numbers