I've finally made a proper start on the planned migration to webp for images. I did consider writing a tool that would go through and migrate the files, and update the Markdown, all in one go, but something about that makes me kind of nervous. While it wouldn't be a destructive approach (the whole blog is under version control after all), I just have this niggling feeling that I'd miss something and it would sit broken, unnoticed, for ages.

So instead I've decided to take a one-post-at-a-time approach, making the migration by hand. As well as having the benefit of letting me go slowly and check my work as I go, I can also do some tidying up of old posts. So while I do this I'm also going to tidy up obviously broken links when I notice them, and also remove embedded tweets (swapping to the simple blockquote version).

Another thing I'm doing is adding cover images where possible. I'd been running this blog for a long time before I started to use cover (it might be that I didn't start until I moved to Pelican). Since then I've tried to use it any time there's an appropriate image in a post. More recently, I added cover images to the graph view so they're even more useful now. Back-adding a cover to older posts will make them more appealing to discover in the graph because those older notes will acquire attention-grabbing thumbnails too.

One thing I wanted to do was have an easy way to keep track of where I'm up to in the migration. It's going to be a steady process that's going to take a few days, doing a few posts at a time. So to aid this I've added this to the Makefile of the blog:

cd content/extras/attachments
find -E ./ -iregex '.*\.(png|jpg|jpeg)$' | cut -d'/' -f2,3,4 | sort -u

With this I get a handy list of dates of posts that still have unconverted png or jpeg files.

Of course, for a wee while, this will not get to an empty list because I want to make sure some of the more recent posts still have their older images available as they might be in feeds out there. More recently I've only been using webp for images, so once the webp-using posts fill the main RSS and Atom feeds I can clean out the last of the bulkier images.