From 45aeddb69b8d7b2fdf35c8b2903e757ee94f9865 Mon Sep 17 00:00:00 2001
From: Eduardo Cueto-Mendoza <eduardo.cueto@adaptcentre.ie>
Date: Mon, 23 Dec 2024 17:10:03 +0000
Subject: [PATCH] Modified neovim for better Rust auto complete

---
 .config/nvim/after/plugin/04_lspconfig.lua  | 26 ++-------------------
 .config/nvim/after/plugin/05_completion.lua | 10 ++++----
 .config/nvim/after/plugin/07_rust.lua       | 18 ++++++++++++++
 .config/nvim/lua/eddie/lazy.lua             | 13 ++++++++---
 .config/nvim/lua/eddie/options.lua          |  9 +++++++
 5 files changed, 44 insertions(+), 32 deletions(-)
 create mode 100644 .config/nvim/after/plugin/07_rust.lua

diff --git a/.config/nvim/after/plugin/04_lspconfig.lua b/.config/nvim/after/plugin/04_lspconfig.lua
index e45d587..31ba2eb 100644
--- a/.config/nvim/after/plugin/04_lspconfig.lua
+++ b/.config/nvim/after/plugin/04_lspconfig.lua
@@ -3,6 +3,7 @@ local lspconfig = require 'lspconfig'
 -- local on_attach = function(client)
 --     require 'completion'.on_attach(client)
 -- end
+vim.lsp.inlay_hint.enable(true)
 
 local capabilities = require('cmp_nvim_lsp').default_capabilities()
 
@@ -64,7 +65,7 @@ lspconfig.lua_ls.setup {
        },
         diagnostics = {
           -- Get the language server to recognize the `vim` global
-          globals = { 'vim', 'require' },
+          globals = { 'vim', 'require', 'select_opts' },
         },
         format = {
            -- Put format options here
@@ -109,26 +110,3 @@ lspconfig.pylsp.setup {
     },
 }
 
--- RUST
-lspconfig.rust_analyzer.setup({
-    -- on_attach = on_attach,
-    capabilities = capabilities,
-    settings = {
-        ["rust-analyzer"] = {
-            imports = {
-                granularity = {
-                    group = "module",
-                },
-                prefix = "self",
-            },
-            cargo = {
-                buildScripts = {
-                    enable = true,
-                },
-            },
-            procMacro = {
-                enable = true
-            },
-        }
-    }
-})
diff --git a/.config/nvim/after/plugin/05_completion.lua b/.config/nvim/after/plugin/05_completion.lua
index fb254af..f27c85d 100644
--- a/.config/nvim/after/plugin/05_completion.lua
+++ b/.config/nvim/after/plugin/05_completion.lua
@@ -22,9 +22,13 @@ cmp.setup({
     mapping = cmp.mapping.preset.insert({
         ['<C-b>'] = cmp.mapping.scroll_docs(-4),
         ['<C-f>'] = cmp.mapping.scroll_docs(4),
+        -- Allows selection with tab and shift-tab
+        ['<S-Tab>'] = cmp.mapping.select_prev_item(select_opts),
+        ['<Tab>'] = cmp.mapping.select_next_item(select_opts),
         ['<C-Space>'] = cmp.mapping.complete(),
         ['<C-e>'] = cmp.mapping.abort(),
-        ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
+        -- ['<CR>'] = cmp.mapping.confirm({ select = true }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
+        ['<CR>'] = cmp.mapping.confirm({ select = false }), -- Accept currently selected item. Set `select` to `false` to only confirm explicitly selected items.
     }),
     sources = cmp.config.sources({
         { name = 'nvim_lsp' },
@@ -100,7 +104,3 @@ require('lspconfig')['pylsp'].setup {
     capabilities = capabilities
 }
 
--- RUST
-require('lspconfig')['rust_analyzer'].setup {
-    capabilities = capabilities
-}
diff --git a/.config/nvim/after/plugin/07_rust.lua b/.config/nvim/after/plugin/07_rust.lua
new file mode 100644
index 0000000..85fbc7d
--- /dev/null
+++ b/.config/nvim/after/plugin/07_rust.lua
@@ -0,0 +1,18 @@
+local bufnr = vim.api.nvim_get_current_buf()
+vim.keymap.set(
+  "n",
+  "<leader>a",
+  function()
+    vim.cmd.RustLsp('codeAction') -- supports rust-analyzer's grouping
+    -- or vim.lsp.buf.codeAction() if you don't want grouping.
+  end,
+  { silent = true, buffer = bufnr }
+)
+vim.keymap.set(
+  "n",
+  "K",  -- Override Neovim's built-in hover keymap with rustaceanvim's hover actions
+  function()
+    vim.cmd.RustLsp({'hover', 'actions'})
+  end,
+  { silent = true, buffer = bufnr }
+)
diff --git a/.config/nvim/lua/eddie/lazy.lua b/.config/nvim/lua/eddie/lazy.lua
index 2677154..7497c8a 100755
--- a/.config/nvim/lua/eddie/lazy.lua
+++ b/.config/nvim/lua/eddie/lazy.lua
@@ -36,6 +36,12 @@ local plugins = {
     { 'hrsh7th/cmp-buffer' },
     { 'hrsh7th/cmp-path' },
     { 'hrsh7th/cmp-cmdline' },
+    -- Rust cmp & lsp
+    {
+        'mrcjkb/rustaceanvim',
+        version = '^5', -- Recommended
+        lazy = false, -- This plugin is already lazy
+    },
 
     -- -- For luasnip users
     {
@@ -49,8 +55,7 @@ local plugins = {
         'nvim-lua/plenary.nvim',
     },
     { 'echasnovski/mini.nvim', version = '*' },
-    -- Rust & vim auxiliary packages
-    { "simrat39/rust-tools.nvim" },
+    -- vim auxiliary packages
     {
         "lervag/vimtex",
         lazy = false,     -- we don't want to lazy load VimTeX
@@ -151,7 +156,7 @@ local plugins = {
             { 'nvim-telescope/telescope.nvim' },
         },
     },
-    'jinh0/eyeliner.nvim',
+    { 'jinh0/eyeliner.nvim' },
     {
         "anuvyklack/windows.nvim",
         dependencies = {
@@ -193,6 +198,8 @@ local plugins = {
     {
         'sakhnik/nvim-gdb',
     },
+    -- Rust debug
+    { 'mfussenegger/nvim-dap' },
     -- Compiler
     { -- This plugin
         "Zeioth/compiler.nvim",
diff --git a/.config/nvim/lua/eddie/options.lua b/.config/nvim/lua/eddie/options.lua
index f4b3350..6512e4e 100755
--- a/.config/nvim/lua/eddie/options.lua
+++ b/.config/nvim/lua/eddie/options.lua
@@ -206,6 +206,15 @@ then
     -- optionally enable 24-bit colour
     -- vim.opt.termguicolors = true
 
+    -- Folds
+    vim.opt.foldmethod = "expr"
+    vim.opt.foldexpr = "v:lua.vim.treesitter.foldexpr()"
+    vim.opt.foldcolumn = "0"
+    vim.opt.foldtext = ""
+    vim.opt.foldlevel = 99
+    vim.opt.foldlevelstart = 1
+    vim.opt.foldnestmax = 4
+
     vim.opt.scrolloff = 8
     vim.opt.signcolumn = "yes"
     vim.opt.isfname:append("@-@")