init.vim

" Author: Robert A. Enzmann
" License: Do anything you like.
"
" =============================================================================
"                             Source ~/.vim/vimrc
" =============================================================================
set runtimepath^=~/.vim runtimepath+=~/.vim/after
let &packpath=&runtimepath
source ~/.vim/vimrc
let g:python3_host_prog = '~/.nvim.venv/bin/python'

" =============================================================================
"                              Plugin Management
" =============================================================================
call plug#begin('~/.config/nvim/plugged')
Plug 'neovim/nvim-lspconfig'
Plug 'folke/lsp-colors.nvim'
Plug 'morhetz/gruvbox'
Plug 'cocopon/iceberg.vim'
Plug 'doums/darcula'
Plug 'psf/black'
Plug 'rust-lang/rust.vim'
Plug 'cespare/vim-toml'
Plug '~/.fzf'
Plug 'junegunn/fzf.vim'
Plug 'tpope/vim-commentary'
Plug 'tpope/vim-surround'
Plug 'tpope/vim-dadbod'
Plug 'tpope/vim-sensible'
Plug 'tpope/vim-fugitive'
Plug 'nvim-treesitter/nvim-treesitter', {'branch': '0.5-compat'}
Plug 'hrsh7th/cmp-nvim-lsp'
Plug 'hrsh7th/cmp-buffer'
Plug 'hrsh7th/nvim-cmp'
Plug 'hrsh7th/cmp-vsnip'
Plug 'hrsh7th/vim-vsnip'
Plug 'jpalardy/vim-slime'
call plug#end()

" Overriding settings in my own plugins
" -------------------------------------
" Don't pop up the quickfix menu automatically - we have the language server
let g:py_nolint=1

" =============================================================================
"                        Language Server Configuration
" =============================================================================
" Copied from the suggestions in the nvim-lspconfig README:
" https://github.com/neovim/nvim-lspconfig
lua << EOF
local nvim_lsp = require('lspconfig')

-- 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)
  local function buf_set_keymap(...) vim.api.nvim_buf_set_keymap(bufnr, ...) end
  local function buf_set_option(...) vim.api.nvim_buf_set_option(bufnr, ...) end

  --Enable completion triggered by <c-x><c-o>
  --commenting out while trying nvim-compe
  --buf_set_option('omnifunc', 'v:lua.vim.lsp.omnifunc')

  -- Mappings.
  local opts = { noremap=true, silent=true }

  -- See `:help vim.lsp.*` for documentation on any of the below functions
  buf_set_keymap('n', 'gD', '<CMD>lua vim.lsp.buf.declaration()<CR>', opts)
  buf_set_keymap('n', 'gd', '<CMD>lua vim.lsp.buf.definition()<CR>', opts)
  buf_set_keymap('n', 'K', '<CMD>lua vim.lsp.buf.hover()<CR>', opts)
  buf_set_keymap('n', 'gi', '<CMD>lua vim.lsp.buf.implementation()<CR>', opts)
  buf_set_keymap('n', '<C-k>', '<CMD>lua vim.lsp.buf.signature_help()<CR>', opts)
  buf_set_keymap('n', '<leader>wa', '<CMD>lua vim.lsp.buf.add_workspace_folder()<CR>', opts)
  buf_set_keymap('n', '<leader>wr', '<CMD>lua vim.lsp.buf.remove_workspace_folder()<CR>', opts)
  buf_set_keymap('n', '<leader>wl', '<CMD>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>', opts)
  buf_set_keymap('n', '<leader>D', '<CMD>lua vim.lsp.buf.type_definition()<CR>', opts)
  buf_set_keymap('n', '<leader>rn', '<CMD>lua vim.lsp.buf.rename()<CR>', opts)
  buf_set_keymap('n', '<leader>ca', '<CMD>lua vim.lsp.buf.code_action()<CR>', opts)
  buf_set_keymap('n', 'gr', '<CMD>lua vim.lsp.buf.references()<CR>', opts)
  buf_set_keymap('n', '<leader>e', '<CMD>lua vim.lsp.diagnostic.show_line_diagnostics()<CR>', opts)
  buf_set_keymap('n', '[d', '<CMD>lua vim.lsp.diagnostic.goto_prev()<CR>', opts)
  buf_set_keymap('n', ']d', '<CMD>lua vim.lsp.diagnostic.goto_next()<CR>', opts)
  buf_set_keymap('n', '<leader>q', '<CMD>lua vim.lsp.diagnostic.set_loclist()<CR>', opts)
  buf_set_keymap("n", "<leader>f", "<CMD>lua vim.lsp.buf.formatting()<CR>", opts)
end

-- Use a loop to conveniently call 'setup' on multiple servers and
-- map buffer local keybindings when the language server attaches
local servers = { "pyright", "bashls", "yamlls" }
for _, lsp in ipairs(servers) do
  nvim_lsp[lsp].setup { on_attach = on_attach }
end


-- Uncomment to disable diagnostics
-- vim.lsp.handlers["textDocument/publishDiagnostics"] = function() end
EOF

" Uncomment to disable location list of diagnostics
function! LspLocationList()
  lua vim.lsp.diagnostic.set_loclist({open_loclist = false})
endfunction

" Uncomment to enable automatic opening of location list with LSP diagnostics
" augroup lsp_loclist
"   autocmd!
"   autocmd BufWrite,BufEnter,InsertLeave * :call LspLocationList()
" augroup END

" Diagnostics colors
lua << EOF
require("lsp-colors").setup {
  Error = "#db4b4b",
  Warning = "#e0af68",
  Information = "#0db9d7",
  Hint = "#10B981"
}
EOF

" Activate LSP colors
colo gruvbox

" =============================================================================
"                             nvim-cmp
" =============================================================================
set completeopt=menu,menuone,noselect

lua << EOF
  -- Setup nvim-cmp.
  local cmp = require'cmp'

  cmp.setup({
    snippet = {
      expand = function(args)
        vim.fn["vsnip#anonymous"](args.body) -- For `vsnip` users.
        -- require('luasnip').lsp_expand(args.body) -- For `luasnip` users.
        -- vim.fn["UltiSnips#Anon"](args.body) -- For `ultisnips` users.
        -- require'snippy'.expand_snippet(args.body) -- For `snippy` users.
      end,
    },
    mapping = {
      ['<Tab>'] = cmp.mapping(cmp.mapping.select_next_item(), {'i', 's'}),
      ['<C-d>'] = cmp.mapping.scroll_docs(-4),
      ['<C-f>'] = cmp.mapping.scroll_docs(4),
      ['<C-Space>'] = cmp.mapping.complete(),
      ['<C-e>'] = cmp.mapping.close(),
      ['<CR>'] = cmp.mapping.confirm({ select = true }),
    },
    sources = cmp.config.sources({
      { name = 'nvim_lsp' },
      { name = 'vsnip' }, -- For vsnip users.
      -- { name = 'luasnip' }, -- For luasnip users.
      -- { name = 'ultisnips' }, -- For ultisnips users.
      -- { name = 'snippy' }, -- For snippy users.
    }, {
      { name = 'buffer' },
    })
  })

  -- Setup lspconfig.
  local capabilities = require('cmp_nvim_lsp').update_capabilities(vim.lsp.protocol.make_client_capabilities())
  require('lspconfig')['pyright'].setup {
    capabilities = capabilities
  }
EOF


" =============================================================================
"                             fzf customization
" =============================================================================
" [Tags] Command to generate tags file
let g:fzf_tags_command = 'ctags -R --exclude=.venv'
" [Buffers] Jump to the existing window if possible
let g:fzf_buffers_jump = 1
" Highlighting in preview
let $FZF_DEFAULT_OPTS = "--layout=reverse --info=inline --preview 'bat --color=always --style=header,grid --line-range :300 {}'"

" =============================================================================
"                             treesitter modules
" =============================================================================
lua <<EOF
require'nvim-treesitter.configs'.setup {
  -- Modules and its options go here
  highlight = { enable = true },
  incremental_selection = { enable = true },
  textobjects = { enable = true },
}
EOF


" =============================================================================
"                             slime customization
" =============================================================================
let g:slime_target = "tmux"
let g:slime_default_config = {"socket_name": "default", "target_pane": "1"}