Insane mod_rewrite gymnastics for my blog setup.

.htaccess

RewriteEngine On

# Map http://henrik.nyh.se to /jekyll.
RewriteRule ^$ /jekyll/ [L]

# Map http://henrik.nyh.se/x to /jekyll/x unless there is a x in the web root.
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_URI} !^/jekyll/
RewriteRule ^(.*)$  /jekyll/$1

# Add trailing slash to directories without them so DirectoryIndex works.
# This does not expose the internal URL.
RewriteCond %{REQUEST_FILENAME} -d
RewriteCond %{REQUEST_FILENAME} !/$
RewriteRule ^(.*)$  $1/

.htaccess

# Disable auto-adding slashes to directories without them, since this happens
# after mod_rewrite and exposes the rewritten internal URL, e.g. turning
# http://henrik.nyh.se/about into http://henrik.nyh.se/jekyll/about.
DirectorySlash off