initial home-manager setup with neovim and starship

neovim/coc.part.lua

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+-- https://raw.githubusercontent.com/neoclide/coc.nvim/master/doc/coc-example-config.lua
+
+-- Some servers have issues with backup files, see #649
+vim.opt.backup = false
+vim.opt.writebackup = false
+
+-- Having longer updatetime (default is 4000 ms = 4s) leads to noticeable
+-- delays and poor user experience
+vim.opt.updatetime = 300
+
+-- Always show the signcolumn, otherwise it would shift the text each time
+-- diagnostics appeared/became resolved
+vim.opt.signcolumn = "yes"
+
+local keyset = vim.keymap.set
+-- Autocomplete
+function _G.check_back_space()
+    local col = vim.fn.col('.') - 1
+    return col == 0 or vim.fn.getline('.'):sub(col, col):match('%s') ~= nil
+end
+
+-- Use Tab for trigger completion with characters ahead and navigate
+-- NOTE: There's always a completion item selected by default, you may want to enable
+-- no select by setting `"suggest.noselect": true` in your configuration file
+-- NOTE: Use command ':verbose imap <tab>' to make sure Tab is not mapped by
+-- other plugins before putting this into your config
+local opts = {silent = false, noremap = true, expr = true, replace_keycodes = false}
+keyset("i", "<TAB>", 'coc#pum#visible() ? coc#pum#next(1) : v:lua.check_back_space() ? "<TAB>" : coc#refresh()', opts)
+keyset("i", "<S-TAB>", [[coc#pum#visible() ? coc#pum#prev(1) : "\<C-h>"]], opts)
+
+-- Make <CR> to accept selected completion item or notify coc.nvim to format
+-- <C-g>u breaks current undo, please make your own choice
+keyset("i", "<cr>", [[coc#pum#visible() ? coc#pum#confirm() : "\<C-g>u\<CR>\<c-r>=coc#on_enter()\<CR>"]], opts)
+
+-- Use <c-space> to trigger completion
+keyset("i", "<c-space>", "coc#refresh()", {silent = true, expr = true})