From 8f4019443d8a9427bbae9ad03385a8917d91ceb9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kier=C3=A1n=20Meinhardt?= <kmein@posteo.de>
Date: Mon, 6 Mar 2023 22:01:58 +0100
Subject: [PATCH] feat(neovim): hello lsp

---
 configs/neovim.nix |  7 +++-
 lib/vim/init.lua   | 86 ++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 92 insertions(+), 1 deletion(-)
 create mode 100644 lib/vim/init.lua

diff --git a/configs/neovim.nix b/configs/neovim.nix
index e4313c2..3394c0d 100644
--- a/configs/neovim.nix
+++ b/configs/neovim.nix
@@ -12,7 +12,11 @@
     (pkgs.writers.writeDashBin "vim" ''neovim "$@"'')
     (pkgs.neovim.override {
       configure = {
-        customRC = builtins.readFile ../lib/vim/init.vim;
+        customRC = ''
+          source ${../lib/vim/init.vim}
+
+          luafile ${../lib/vim/init.lua}
+        '';
         packages.nvim = with pkgs.vimPlugins; {
           start = [
             ale
@@ -23,6 +27,7 @@
             tabular
             # vimwiki
             niveumPackages.vimPlugins-vim-colors-paramount
+            nvim-lspconfig
             vim-commentary
             vim-css-color
             vim-eunuch
diff --git a/lib/vim/init.lua b/lib/vim/init.lua
new file mode 100644
index 0000000..8721f82
--- /dev/null
+++ b/lib/vim/init.lua
@@ -0,0 +1,86 @@
+local opts = { noremap=true, silent=true }
+vim.keymap.set('n', '<space>e', vim.diagnostic.open_float, opts)
+vim.keymap.set('n', '[d', vim.diagnostic.goto_prev, opts)
+vim.keymap.set('n', ']d', vim.diagnostic.goto_next, opts)
+vim.keymap.set('n', '<space>q', vim.diagnostic.setloclist, opts)
+
+-- Use an on_attach function to only map the following keys
+-- after the language server attaches to the current buffer
+local on_attach = function(client, bufnr)
+  -- Enable completion triggered by <c-x><c-o>
+  vim.api.nvim_buf_set_option(bufnr, 'omnifunc', 'v:lua.vim.lsp.omnifunc')
+
+  -- Mappings.
+  -- See `:help vim.lsp.*` for documentation on any of the below functions
+  local bufopts = { noremap=true, silent=true, buffer=bufnr }
+  vim.keymap.set('n', 'gD', vim.lsp.buf.declaration, bufopts)
+  vim.keymap.set('n', 'gd', vim.lsp.buf.definition, bufopts)
+  vim.keymap.set('n', 'K', vim.lsp.buf.hover, bufopts)
+  vim.keymap.set('n', 'gi', vim.lsp.buf.implementation, bufopts)
+  vim.keymap.set('n', '<C-k>', vim.lsp.buf.signature_help, bufopts)
+  vim.keymap.set('n', '<space>wa', vim.lsp.buf.add_workspace_folder, bufopts)
+  vim.keymap.set('n', '<space>wr', vim.lsp.buf.remove_workspace_folder, bufopts)
+  vim.keymap.set('n', '<space>wl', function()
+    print(vim.inspect(vim.lsp.buf.list_workspace_folders()))
+  end, bufopts)
+  vim.keymap.set('n', '<space>D', vim.lsp.buf.type_definition, bufopts)
+  vim.keymap.set('n', '<space>rn', vim.lsp.buf.rename, bufopts)
+  vim.keymap.set('n', '<space>ca', vim.lsp.buf.code_action, bufopts)
+  vim.keymap.set('n', 'gr', vim.lsp.buf.references, bufopts)
+  vim.keymap.set('n', '<space>f', function() vim.lsp.buf.format { async = true } end, bufopts)
+end
+
+local lsp_flags = {
+  -- This is the default in Nvim 0.7+
+  debounce_text_changes = 150,
+}
+
+language_servers = {
+  pyright = {}, -- pyright
+  tsserver = {}, -- typescript-language-server
+  elmls = {}, -- elm-language-server
+  denols = {}, -- deno built in
+  bashls = {}, -- bash-language-server
+  hls = {}, -- haskell-language-server
+  html = {}, -- vscode-langservers-extracted
+  jsonls = {}, -- vscode-langservers-extracted
+  nil_ls = {}, -- github:oxalica/nil
+  rnix = {}, -- rnix-lsp
+  -- jqls = {}, -- jq-lsp
+  rust_analyzer = { ["rust-analyzer"] = {} },
+  -- eslint?
+  -- volar? vls?
+  texlab = {
+    texlab = {
+      auxDirectory = ".",
+      bibtexFormatter = "texlab",
+      build = {
+        args = { "-pdf", "-interaction=nonstopmode", "-synctex=1", "%f" },
+        executable = "latexmk",
+        forwardSearchAfter = false,
+        onSave = false
+      },
+      chktex = {
+        onEdit = false,
+        onOpenAndSave = false
+      },
+      diagnosticsDelay = 300,
+      formatterLineLength = 80,
+      forwardSearch = {
+        args = {}
+      },
+      latexFormatter = "latexindent",
+      latexindent = {
+        modifyLineBreaks = false
+      }
+    }
+  }
+}
+
+for server, settings in pairs(language_servers) do
+  require('lspconfig')[server].setup{
+    on_attach = on_attach,
+    flags = lsp_flags,
+    settings = settings,
+  }
+end