.htaccess

RewriteEngine On

# Common errors
RewriteRule ^ga.js$ / [R=404,L,NC]

# Jekyll: home page
RewriteCond %{REQUEST_URI} ^index\.html$ [NC]
RewriteRule . / [R=301,L,NC]

# Jekyll: demo page
RewriteCond %{REQUEST_URI} ^demos/ [NC]
RewriteCond %{REQUEST_FILENAME} -f
RewriteRule . - [L]

# Jekyll: tags page
RewriteCond %{REQUEST_URI} ^tag/(index\.html)?$ [NC]
RewriteRule . /tag [R=301,L,NC]
RewriteRule ^tag$ /tag/index.html [L,NC]

# Jekyll: tag page
RewriteCond %{REQUEST_URI} ^tag/[^/]+/(index\.html)?$ [NC]
RewriteRule ^(tag/[^/]+)/index\.html$ $1 [R=301,L,NC]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^tag/([^/]+)$ /tag/$1/index.html [L,NC]

# Jekyll: post page
RewriteCond %{REQUEST_URI} ^[^/]+(/|\.html)$ [NC]
RewriteRule ^([^/]+)\.html$ $1 [R=301,L,NC]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^([^/]+)$ $1\.html [L,NC]