Adding autoformat of = with autopairs

nvim/nvim/config/new/lua/treesitter/npairs.lua

@@ -12,3 +12,59 @@ 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 = '' } }))
 
+local Rule   = require'nvim-autopairs.rule'
+local cond = require'nvim-autopairs.conds'
+
+npairs.add_rules {
+	Rule(' ', ' ')
+		:with_pair(function (opts)
+			local pair = opts.line:sub(opts.col - 1, opts.col)
+			return vim.tbl_contains({ '()', '[]', '{}' }, pair)
+	end),
+	Rule('( ', ' )')
+		:with_pair(function() return false end)
+		:with_move(function(opts)
+			return opts.prev_char:match('.%)') ~= nil
+		end)
+		:use_key(')'),
+	Rule('{ ', ' }')
+		:with_pair(function() return false end)
+		:with_move(function(opts)
+			return opts.prev_char:match('.%}') ~= nil
+		end)
+		:use_key('}'),
+	Rule('[ ', ' ]')
+		:with_pair(function() return false end)
+		:with_move(function(opts)
+			return opts.prev_char:match('.%]') ~= nil
+		end)
+		:use_key(']'),
+
+	Rule('=', '')
+		:with_pair(cond.not_inside_quote())
+		:with_pair(function(opts)
+			local last_char = opts.line:sub(opts.col - 1, opts.col - 1)
+			if last_char:match('[%w%=%s]') then
+				return true
+			end
+			return false
+		end)
+		:replace_endpair(function(opts)
+			local prev_2char = opts.line:sub(opts.col - 2, opts.col - 1)
+			local next_char = opts.line:sub(opts.col, opts.col)
+			next_char = next_char == ' ' and '' or ' '
+			if prev_2char:match('%w$') then
+				return '<bs> =' .. next_char
+			end
+			if prev_2char:match('%=$') then
+				return next_char
+			end
+			if prev_2char:match('=') then
+				return '<bs><bs>=' .. next_char
+			end
+			return ''
+		end)
+		:set_end_pair_length(0)
+		:with_move(cond.none())
+		:with_del(cond.none())
+}