large changes

lib/util.lua

@@ -3,12 +3,33 @@ local symbol = require("lib.symbol")
 
 local M = {}
 
-function M.cc(tbl)
-	return table.concat(tbl)
+function M.cc(tbl, sep)
+	return table.concat(tbl, sep or "")
 end
 
-function M.copyright(link, holder)
-	return symbol.copyright .. " " .. std.external(link, holder)
+function M.year(y)
+	return y or os.date("%Y")
+end
+
+function M.copyright(link, holder, year)
+	return symbol.legal.copyright .. " " .. M.year(year) .. " " .. std.external(link, holder)
+end
+
+function M.license(name)
+	return symbol.legal.registered .. " " .. name
+end
+
+function M.ls(dir)
+	local p = io.popen('ls -A -1 -- ' .. string.format('%q', dir))
+	if not p then
+		return nil
+	end
+	local t = {}
+	for line in p:lines() do
+		t[#t + 1] = line
+	end
+	p:close()
+	return t
 end
 
 return M