some experiments with completion

config/vis/visrc.lua

@@ -43,5 +43,33 @@ end)
 vis:map(vis.modes.NORMAL, ";;", "<vis-window-next>")
 
 vis:map(vis.modes.NORMAL, ";i", function()
-	vis:command("!python -i $vis_filename")
+	if vis.win.syntax == "python" then
+		vis:command("!python -i $vis_filename")
+	end
 end)
+
+lines = nil
+index = 1
+
+vis:map(vis.modes.INSERT, "<Tab>", function()
+	local win = vis.win
+	local pos = win.selection.pos
+	local word = win.file:content(win.file:text_object_word(pos - 1))
+	if word:gsub("%s+", "") == "" then
+		vis:insert("	")
+		return pos+1
+	end
+
+	lines = {}
+	local nlines = 0
+	local handle = io.popen(string.format("cut -f1 tags | uniq | grep '^%s'", word))
+	for line in handle:lines() do
+		table.insert(lines, line)
+		nlines = nlines + 1
+	end
+
+	if nlines == 0 then
+		lines = nil
+	end
+end)
+-- Rec