--- /dev/null
+-- Copyright (C) 2015 all contributors <meta@public-inbox.org>
+-- License: GPLv2 or later (https://www.gnu.org/licenses/gpl-2.0.txt)
+-- This commit filter maps a subject line to a search URL of a public-inbox
+-- disclaimer: written by someone who does not know Lua.
+--
+-- This requires cgit linked with Lua
+-- Usage (in your cgitrc(5) config file):
+--
+-- commit-filter=lua:/path/to/this/script.lua
+--
+-- Example: http://bogomips.org/public-inbox.git/
+
+local urls = {}
+urls['public-inbox.git'] = 'http://public-inbox.org/meta/'
+-- additional URLs here...
+
+function filter_open(...)
+ lineno = 0
+ buffer = ""
+ subject = ""
+end
+
+function filter_close()
+ if lineno == 1 and string.find(buffer, "\n") == nil then
+ u = urls[os.getenv('CGIT_REPO_URL')]
+ if u == nil then
+ html(buffer)
+ else
+ html('<a href="' .. u .. '?x=t&q=')
+ html_url_arg('"' .. buffer .. '"')
+ html('"><tt>')
+ html_txt(buffer)
+ html('</tt></a>')
+ end
+ else
+ html(buffer)
+ end
+ return 0
+end
+
+function filter_write(str)
+ lineno = lineno + 1
+ buffer = buffer .. str
+end