lua: move digraph handling to separate 'plugin'

Load a standard plugins directly from vis-std.lua.

lua/plugins/digraph.lua

@@ -0,0 +1,23 @@
+-- insert digraphs using vis-digraph(1)
+
+vis:map(vis.modes.INSERT, "<C-k>", function(keys)
+	if #keys < 2 then
+		return -1 -- need more input
+	end
+	local file = io.popen(string.format("vis-digraph '%s' 2>&1", keys:gsub("'", "'\\''")))
+	local output = file:read('*all')
+	local success, msg, status = file:close()
+	if success then
+		if vis.mode == vis.modes.INSERT then
+			vis:insert(output)
+		elseif vis.mode == vis.modes.REPLACE then
+			vis:replace(output)
+		end
+	elseif msg == 'exit' then
+		if status == 2 then
+			return -1 -- prefix need more input
+		end
+		vis:info(output)
+	end
+	return #keys
+end, "Insert digraph")

lua/vis-std.lua

@@ -123,26 +123,8 @@ vis.events.subscribe(vis.events.WIN_STATUS, function(win)
 	win:status(left, right);
 end)
 
--- additional default keybindings
+-- default plugins
 
-vis:map(vis.modes.INSERT, "<C-k>", function(keys)
-	if #keys < 2 then
-		return -1 -- need more input
-	end
-	local file = io.popen(string.format("vis-digraph '%s' 2>&1", keys:gsub("'", "'\\''")))
-	local output = file:read('*all')
-	local success, msg, status = file:close()
-	if success then
-		if vis.mode == vis.modes.INSERT then
-			vis:insert(output)
-		elseif vis.mode == vis.modes.REPLACE then
-			vis:replace(output)
-		end
-	elseif msg == 'exit' then
-		if status == 2 then
-			return -1 -- prefix need more input
-		end
-		vis:info(output)
-	end
-	return #keys
-end, "Insert digraph")
+require('plugins/filetype')
+require('plugins/textobject-lexer')
+require('plugins/digraph')

lua/visrc.lua

@@ -1,7 +1,5 @@
 -- load standard vis module, providing parts of the Lua API
 require('vis')
-require('plugins/filetype')
-require('plugins/textobject-lexer')
 
 vis.events.subscribe(vis.events.INIT, function()
 	-- Your global configuration options