I also write my blog in plain text, using a markup language I created and call incipit.
I then use an awk script to convert the txts to a body-only html.
Then, I use m4 to envelope the body into a full html with head tag.
Everything is coordinated with BSD makefiles.

All pages, except the index, are written manually in txt.
The index.txt, however is generated by m4 after collecting the names of all the other pages. It then goes by the process of txt→body (via that awk script) and body→html (via m4).

The feed.xml is also created with m4.

I use openrsync (OpenBSD's implementation of rsync(1)) to send the files to my remote server.

Here is the source of my website