1-- This script may be used with the email-filter or repo.email-filter settings in cgitrc.
 2-- It adds gravatar icons to author names. It is designed to be used with the lua:
 3-- prefix in filters. It is much faster than the corresponding python script.
 4--
 5-- Requirements:
 6-- 	luacrypto >= 0.3
 7-- 	<http://mkottman.github.io/luacrypto/>
 8--
 9
10local crypto = require("crypto")
11
12function filter_open(email, page)
13	buffer = ""
14	md5 = crypto.digest("md5", email:sub(2, -2):lower())
15end
16
17function filter_close()
18	html("<img src='//www.gravatar.com/avatar/" .. md5 .. "?s=13&amp;d=retro' width='13' height='13' alt='Gravatar' /> " .. buffer)
19	return 0
20end
21
22function filter_write(str)
23	buffer = buffer .. str
24end
25
26