nvim: Switch deprecated nvim-compe

Switched out the deprecated nvim-compe for nvim-cmp and re-added most of
the plugins that the earlier one supported.

The handling is very similar and it supports the same snippet engine
(vsnip in this case).

nvim/.config/nvim/lua/plug/_autopair.lua

@@ -1,8 +1,4 @@
 require('nvim-autopairs').setup({check_ts = true})
-require("nvim-autopairs.completion.compe").setup({
-    map_cr = true, --  map <CR> on insert mode
-    map_complete = true -- it will auto insert `(` after select function or method item
-})
 
 --- Auto-space rules
 local npairs = require 'nvim-autopairs'
@@ -14,3 +10,9 @@ npairs.add_rules {
         return vim.tbl_contains({'()', '[]', '{}'}, pair)
     end)
 }
+local cmp_autopairs = require('nvim-autopairs.completion.cmp')
+local cmp = require('cmp')
+cmp.event:on('confirm_done',
+             cmp_autopairs.on_confirm_done({map_char = {tex = ''}}))
+-- add a lisp filetype (wrap my-function), FYI: Hardcoded = { "clojure", "clojurescript", "fennel", "janet" }
+cmp_autopairs.lisp[#cmp_autopairs.lisp + 1] = "racket"

nvim/.config/nvim/lua/plug/_indent-blankline.lua

@@ -1,14 +1,11 @@
 -- Settings for indentBlankline
 -- turn off for diff views since we want to compare directly
-if vim.wo.diff then
-  vim.g["indent_blankline_enabled"] = false
-end
+if vim.wo.diff then vim.g["indent_blankline_enabled"] = false end
 
 vim.g.indent_blankline_char = "▏"
 
 vim.g.indent_blankline_filetype_exclude = {
-    "help", "undotree",
-    "markdown", "text", "pandoc", "rst", "asciidoc",
+    "help", "undotree", "markdown", "text", "pandoc", "rst", "asciidoc",
     "vim-plug"
 }
 vim.g.indent_blankline_buftype_exclude = {"terminal"}

nvim/.config/nvim/lua/plug/_lsp.lua

@@ -2,7 +2,23 @@ local api = vim.api
 
 local saga = require 'lspsaga'
 local lspcfg = require 'lspconfig'
-local compe = require 'compe'
+local cmp = require 'cmp'
+local lspkind = require 'lspkind'
+
+require"lsp_signature".setup()
+
+local has_words_before = function()
+    local line, col = unpack(vim.api.nvim_win_get_cursor(0))
+    return col ~= 0 and
+               vim.api.nvim_buf_get_lines(0, line - 1, line, true)[1]:sub(col,
+                                                                          col)
+                   :match("%s") == nil
+end
+
+local feedkey = function(key, mode)
+    vim.api.nvim_feedkeys(vim.api.nvim_replace_termcodes(key, true, true, true),
+                          mode, true)
+end
 
 -- Enable the following language servers
 local servers = {
@@ -10,35 +26,77 @@ local servers = {
     -- sumneko_lua further down, needs more setup
 }
 
-vim.o.completeopt = "menuone,noselect"
--- completion sources, higher priority = closer to the top?
-compe.setup({
-    source = {
-        nvim_lsp = {kind = ""},
-        nvim_treesitter = {kind = "⧻"},
-        buffer = {kind = ""},
-        path = {kind = ""},
-        calc = {kind = ""},
-        nvim_lua = true,
-        emoji = {
-            kind = "ﲃ",
-            filetypes = {"markdown", "text", "pandoc", "rst", "asciidoc"}
-        },
-        latex_symbols = {
-            kind = "λ",
-            filetypes = {"markdown", "text", "pandoc", "rst", "asciidoc"}
-        },
-        tmux = {kind = "τ"},
-        spell = {kind = "", priority = 0},
-        vsnip = true
-    }
+vim.o.completeopt = "menu,menuone,noselect"
+
+-- completion items
+require('cmp').register_source('vCard', require('completion_vcard').setup_cmp(
+                                   '~/documents/contacts/myconts'))
+vim.g.vsnip_snippet_dir = (vim.env.XDG_DATA_HOME or "~/.local/share") ..
+                              "/nvim/snippets"
+cmp.setup({
+    snippet = {expand = function(args) vim.fn["vsnip#anonymous"](args.body) end},
+    mapping = {
+        ['<C-b>'] = cmp.mapping(cmp.mapping.scroll_docs(-4), {'i', 'c'}),
+        ['<C-f>'] = cmp.mapping(cmp.mapping.scroll_docs(4), {'i', 'c'}),
+        ['<C-Space>'] = cmp.mapping(cmp.mapping.complete(), {'i', 'c'}),
+        ['<C-y>'] = cmp.config.disable, -- Specify `cmp.config.disable` if you want to remove the default `<C-y>` mapping.
+        ['<C-e>'] = cmp.mapping({
+            i = cmp.mapping.abort(),
+            c = cmp.mapping.close()
+        }),
+        -- Accept currently selected item. If none selected, `select` first item.
+        -- Set `select` to `false` to only confirm explicitly selected items.
+        ['<CR>'] = cmp.mapping.confirm({select = false}),
+        ["<C-n>"] = cmp.mapping(function(fallback)
+            if cmp.visible() then
+                cmp.select_next_item()
+            elseif vim.fn["vsnip#available"](1) == 1 then
+                feedkey("<Plug>(vsnip-expand-or-jump)", "")
+            elseif has_words_before() then
+                cmp.complete()
+            else
+                fallback()
+            end
+        end, {"i", "s"}),
+
+        ["<C-p>"] = cmp.mapping(function()
+            if cmp.visible() then
+                cmp.select_prev_item()
+            elseif vim.fn["vsnip#jumpable"](-1) == 1 then
+                feedkey("<Plug>(vsnip-jump-prev)", "")
+            end
+        end, {"i", "s"})
+    },
+    formatting = {
+        format = lspkind.cmp_format({
+            with_text = false,
+            menu = ({
+                buffer = "B",
+                nvim_lua = "NLua",
+                tmux = "τ",
+                vCard = "VCARD"
+            })
+        })
+    },
+    sources = cmp.config.sources({
+        {name = 'path'}, {name = 'nvim_lsp'}, {name = 'treesitter'},
+        {name = 'tmux'}, {name = 'vsnip'}, {name = 'latex_symbols'},
+        {name = 'pandoc_references'}, {name = 'vCard'}
+    }, {{name = 'buffer'}, {name = 'spell'}})
 })
 
-local capabilities = vim.lsp.protocol.make_client_capabilities()
-capabilities.textDocument.completion.completionItem.snippetSupport = true
-capabilities.textDocument.completion.completionItem.resolveSupport = {
-    properties = {'documentation', 'detail', 'additionalTextEdits'}
-}
+-- Use buffer source for `/` search
+cmp.setup.cmdline('/', {sources = {{name = 'buffer'}}})
+
+-- Use cmdline & path source for ':' in vim
+cmp.setup.cmdline(':', {
+    sources = cmp.config.sources({{name = 'path'}}, {{name = 'cmdline'}})
+})
+
+-- Setup lspconfig.
+local capabilities = require('cmp_nvim_lsp').update_capabilities(vim.lsp
+                                                                     .protocol
+                                                                     .make_client_capabilities())
 
 local on_attach = function(_, _)
     -- Keybindings for LSPs
@@ -109,7 +167,9 @@ local on_attach = function(_, _)
 end
 
 -- set up simple servers
-for _, lsp in ipairs(servers) do lspcfg[lsp].setup {on_attach = on_attach} end
+for _, lsp in ipairs(servers) do
+    lspcfg[lsp].setup {on_attach = on_attach, capabilities = capabilities}
+end
 
 lspcfg.efm.setup {
     on_attach = on_attach,

nvim/.config/nvim/lua/plugins.lua

@@ -26,9 +26,10 @@ require("packer").startup(function()
     use 'jeffkreeftmeijer/vim-numbertoggle' -- toggles numbers to absolute for all buffers but the current which is relative
     use 'RRethy/vim-illuminate' -- highlight other occurences of the word under cursor
     use 'ggandor/lightspeed.nvim' -- jump between letters with improved fFtT quicksearch, mimics sneak
-    use 'lukas-reineke/indent-blankline.nvim' -- show a vertical line for each indentation
-    require('plug._indent-blankline')
-
+    -- use { -- weird errors currently
+    --     'lukas-reineke/indent-blankline.nvim', -- show a vertical line for each indentation
+    --     config = function() require('plug._indent-blankline') end
+    -- }
     -- files
     use 'vifm/vifm.vim' -- integrate file manager
     use {
@@ -125,7 +126,6 @@ require("packer").startup(function()
 
     --
     -- nvim plugs
-
     use 'Iron-E/nvim-cartographer' -- makes it easier to set mappings through lua
     use 'marty-oehme/zettelkasten.nvim' -- simple static markdown linking
     use {
@@ -145,12 +145,21 @@ require("packer").startup(function()
 
     -- lsp
     use 'neovim/nvim-lspconfig' -- some commong language server configurations
-    use 'tami5/lspsaga.nvim' -- nice and fast ui for lsp actions
+    use 'tami5/lspsaga.nvim' -- nice and fast ui for lsp actions WILL HAVE TO BE REPLACED SOON
     use 'simrat39/symbols-outline.nvim' -- vista-like outline view for code
+    use 'ray-x/lsp_signature.nvim'
     -- and completion
-    use 'hrsh7th/nvim-compe' -- simple completion engine built specifically for nvim and lsp
-    use 'GoldsteinE/compe-latex-symbols' -- adding unicode symbols for latex (/pandoc) files
-    use {'andersevenrud/compe-tmux', branch = 'compe' } -- completion source from adjacent tmux panes
+    use {
+        'hrsh7th/nvim-cmp', -- simple completion engine built specifically for nvim and lsp
+        requires = {
+            'onsails/lspkind-nvim', 'andersevenrud/cmp-tmux', -- completion source from adjacent tmux panes
+            'hrsh7th/cmp-nvim-lsp', 'hrsh7th/cmp-buffer', 'hrsh7th/cmp-path',
+            'hrsh7th/cmp-cmdline', 'hrsh7th/cmp-vsnip',
+            'kdheepak/cmp-latex-symbols', 'ray-x/cmp-treesitter',
+            'f3fora/cmp-spell', 'jc-doyle/cmp-pandoc-references',
+            'cbarrete/completion-vcard'
+        }
+    }
     -- snippeting
     use {"hrsh7th/vim-vsnip", event = "InsertEnter"} -- snippet engine
     use {"rafamadriz/friendly-snippets", event = "InsertEnter"} -- many snippets
@@ -181,5 +190,9 @@ require("packer").startup(function()
     }
     use 'p00f/nvim-ts-rainbow' -- rainbow brackets using treesitter
     use 'JoosepAlviste/nvim-ts-context-commentstring' -- improves commenting plugin above by using ts
+    use {
+        'lewis6991/spellsitter.nvim', -- uses treesitter to highlight spelling errors
+        config = function() require('spellsitter').setup() end
+    }
 
 end)