Fixing links with jekyll and gh-pages

I recently moved my blog to a GitHub project page, and this caused trouble with the links to images. When previewing the blog locally, the jekyll processor wanted to see absolute links like

![png](/assets/images/pic.png)

but when uploaded to GitHub these links didn’t work.

The solution is buried in the jekyll documentation under the heading Project Page URL Structure. The recommendation is:

<!-- For styles with static names... -->
<link href="{{ "/assets/css/style.css" | relative_url }}" rel="stylesheet">
<!-- For documents/pages whose URLs can change... -->
[{{ page.title }}]("{{ page.url | relative_url }}")

The annoying thing was to go back through all my previous posts and change the links. The following little python filter/regexp seems to do the trick.

import re
import sys
    
for x in sys.stdin:
	
	m=re.sub(r'(!\[[A-Za-z0-9\-\_ ]+\])\((\S+)\)','<img src=\"{{ \"\\2\" | relative_url }}\">',x.strip())
	
	print(m)

And one another annoyance: to put code with curly braces into a markdown document that later gets processed with jekyll, you need to enclose it in “raw/endraw” tags:

{% raw %}
{% endraw %}

And as a final remark, I am deeply grateful to Slaks for showing how to solve the incredibly annoying problem of getting the endraw tag properly displayed!