> in the same repo. If you have two wikis in one repository, you will need
> to write a post-commit script that calls the post-commit wrappers for each
> wiki.
+
+----
+
+# Regex for Valid Characters in Filenames
+
+I'm sure that this is documented somewhere but I've ransacked the wiki and I can't find it. :-( What are the allowed characters in an ikiwiki page name? I'm writing a simple script to make updating my blog easier and need to filter invalid characters (so far I've found that # and , aren't allowed ;-)). Thanks for any pointers. -- [[AdamShand]]
+
+> The default `wiki_file_regexp` matches filenames containing only
+> `[-[:alnum:]_.:/+]`
+>
+> The IkiWiki::titlepage() function will convert freeform text to a valid
+> page name. See [[todo/should_use_a_standard_encoding_for_utf_chars_in_filenames]]
+> for an example. --[[Joey]]
+
+>> Perfect, thanks!
+>>
+>> In the end I decided that I didn't need any special characters in filenames and replaced everything but alphanumeric characters with underscores. In addition to replacing bad characters I also collapse multiple underscores into a single one, and strip off trailing and leading underscores to make tidy filenames. If it's useful to anybody else here's a sed example:
+>>
+>> # echo "++ Bad: ~@#$%^&*()_=}{[];,? Iki: +_-:./ Num: 65.5 ++" | sed -e 's/[^A-Za-z0-9_]/_/g' -e 's/__*/_/g' -e 's/^_//g' -e 's/_$//g'
+>> Bad_Iki_Num_65_5
+>>
+>>--[[AdamShand]]