global: add completion capabilites

- Add completion capabilities for paths.
- Add to the pandoc filetype the markdown snippets.
- Add a markdown template for new files created inside mkdnflow.
- Add all useful filetypes for mkdnflow.
- Add a keymap to fuzzy search open buffers (<leader>sb).
- Removes the `vim.env.HOME` variable in the python3 provider, as it is
  not working properly.

Co-Authored-by: iGor milhit <igor.milhit@unige.ch>

init.lua

@@ -96,6 +96,7 @@ require('lazy').setup({
 
   {
     -- Autocompletion
+    --   See Configure nvim-cmp at the end of this file
     'hrsh7th/nvim-cmp',
     dependencies = {
       -- Snippet Engine & its associated nvim-cmp source
@@ -105,6 +106,9 @@ require('lazy').setup({
       -- Adds LSP completion capabilities
       'hrsh7th/cmp-nvim-lsp',
 
+      -- Adds path completion capabilities
+      'hrsh7th/cmp-path',
+
       -- Adds a number of user-friendly snippets
       'rafamadriz/friendly-snippets',
     },
@@ -277,7 +281,7 @@ vim.opt.foldlevel = 1
 
 -- Set a python virtualenv as python3 provider.
 --   `vim.env.HOME` uses the neovim API to fetch the $HOME env.
-vim.g.python3_host_prog = 'vim.env.HOME/.pyenv/versions/neovim3/bin/python'
+vim.g.python3_host_prog = '/home/igor/.pyenv/versions/neovim3/bin/python'
 
 -- [[ Basic Keymaps ]]
 
@@ -333,6 +337,7 @@ vim.keymap.set('n', '<leader>sh', require('telescope.builtin').help_tags, { desc
 vim.keymap.set('n', '<leader>sw', require('telescope.builtin').grep_string, { desc = '[S]earch current [W]ord' })
 vim.keymap.set('n', '<leader>sg', require('telescope.builtin').live_grep, { desc = '[S]earch by [G]rep' })
 vim.keymap.set('n', '<leader>sd', require('telescope.builtin').diagnostics, { desc = '[S]earch [D]iagnostics' })
+vim.keymap.set('n', '<leader>sb', require('telescope.builtin').buffers, { desc = '[S]earch [B]uffers' })
 
 -- [[ Configure Treesitter ]]
 -- See `:help nvim-treesitter`
@@ -507,7 +512,14 @@ mason_lspconfig.setup_handlers {
 local cmp = require 'cmp'
 local luasnip = require 'luasnip'
 require('luasnip.loaders.from_vscode').lazy_load()
-luasnip.config.setup {}
+luasnip.config.setup {
+  -- Extend markdown snippets to pandoc filetype
+  --   https://github.com/L3MON4D3/LuaSnip/issues/132#issuecomment-1101710309
+  snippets = {
+    markdown = {},
+  },
+  luasnip.filetype_extend("pandoc", {"markdown"})
+}
 
 cmp.setup {
   snippet = {
@@ -547,6 +559,7 @@ cmp.setup {
   sources = {
     { name = 'nvim_lsp' },
     { name = 'luasnip' },
+    { name = 'path' },
   },
 }
 

lua/custom/plugins/mkdnflow.lua

@@ -16,10 +16,37 @@ return {
     lazy = true,
     config = function ()
       require('mkdnflow').setup({
+        filetypes = {
+          md = true,
+          rmd = true,
+          markdown = true,
+          pandoc = true
+        },
         links = {
           conceal = true,
+        },
+        new_file_template = {
+          use_template = true,
+          template = [[
+ ---
+ title:
+ date: {{ date }}
+ id: {{ id }}
+ tags: []
+ ---
+]],
+          placeholders = {
+            before = {
+              date = function ()
+                return os.date("%Y-%m-%dT%H:%M:%S%z")
+              end,
+              id = function ()
+                return os.date("%Y%m%d%H%M%S")
+              end
+            },
+          }
         }
-    })
+      })
     end
   }
 }