avoid using default plugin names for plugin configs

lua/compe/lua.lua

@@ -0,0 +1,84 @@
+vim.cmd [[packadd nvim-lspconfig]]
+vim.cmd [[packadd nvim-compe]]
+
+vim.o.completeopt = "menuone,noselect"
+
+require "compe".setup {
+    enabled = true,
+    autocomplete = true,
+    debug = false,
+    min_length = 1,
+    preselect = "enable",
+    throttle_time = 80,
+    source_timeout = 200,
+    incomplete_delay = 400,
+    max_abbr_width = 100,
+    max_kind_width = 100,
+    max_menu_width = 100,
+    documentation = true,
+    source = {
+        path = true,
+        buffer = true,
+        calc = true,
+        vsnip = true,
+        nvim_lsp = true,
+        nvim_lua = true,
+        spell = true,
+        tags = true,
+        snippets_nvim = true,
+        treesitter = true
+    }
+}
+
+local t = function(str)
+    return vim.api.nvim_replace_termcodes(str, true, true, true)
+end
+
+local check_back_space = function()
+    local col = vim.fn.col('.') - 1
+    if col == 0 or vim.fn.getline('.'):sub(col, col):match('%s') then
+        return true
+    else
+        return false
+    end
+end
+
+-- tab completion 
+
+_G.tab_complete = function()
+  if vim.fn.pumvisible() == 1 then
+    return t "<C-n>"
+  elseif check_back_space() then
+    return t "<Tab>"
+  else
+    return vim.fn['compe#complete']()
+  end
+end
+_G.s_tab_complete = function()
+    if vim.fn.pumvisible() == 1 then
+        return t "<C-p>"
+    elseif vim.fn.call("vsnip#jumpable", {-1}) == 1 then
+        return t "<Plug>(vsnip-jump-prev)"
+    else
+        return t "<S-Tab>"
+    end
+end
+
+--  mappings
+
+vim.api.nvim_set_keymap("i", "<Tab>", "v:lua.tab_complete()", {expr = true})
+vim.api.nvim_set_keymap("s", "<Tab>", "v:lua.tab_complete()", {expr = true})
+vim.api.nvim_set_keymap("i", "<S-Tab>", "v:lua.s_tab_complete()", {expr = true})
+vim.api.nvim_set_keymap("s", "<S-Tab>", "v:lua.s_tab_complete()", {expr = true})
+
+function _G.completions()
+    local npairs = require("nvim-autopairs")
+    if vim.fn.pumvisible() == 1 then
+        if vim.fn.complete_info()["selected"] ~= -1 then
+            return vim.fn["compe#confirm"]("<CR>")
+        end
+    end
+    return npairs.check_break_line_char()
+end
+
+vim.api.nvim_set_keymap("i", "<CR>", "v:lua.completions()", {expr = true})