Hot-wiring the Lisp machine
scheatkode.com> "I'll just read a file, swap out some variables, and write some HTML." – Famous last words
I'm actually living the dream. The key: directly author html. I.e. the above file contains html.
Cool! Also, carrying forward the post author's tongue-in-cheek humour... I see your lua and raise you ~350 lines of Bash (excludes HTML templates). Take a good hard look at this shite [0]. Have you seen anything that is more obviously HTML-about-to-be-expanded-into-a-full-page?
And, unlike PHP or whatever... have you ever seen more composable templating, as in functional programming?shite_template_standard_page_wrapper() { cat <<EOF <!DOCTYPE html> <html lang="en" prefix="og: https://ogp.me/ns#"> $(shite_template_common_head) <body> <div id="the-very-top" class="stack center box"> $(cat -) $(shite_template_common_footer) </div> </body> </html> EOF }
Just imagine all the pipelined pre/post-processor possibilities.cat ./sample/hello.html | shite_template_common_default_page # Or.. cat ./sample/hello.org | pandoc -f org -t html | shite_template_common_default_page[0] project codename `shite`, literally, renders my site https://github.com/adityaathalye/shite
How about one line of POSIX sh with cpp? Though it uses the different approach of SSI instead of templating:
With a little elbow grease, you even get incremental rebuild: https://git.sr.ht/~q3cpma/html-cpp$ cat <<EOF | sed -E 's/^[\t ]*<!--(#.*)-->$/\1/; t; s/^/\a/' | cpp -traditional -nostdinc -P -C | sed -E 's/^\a//' <!DOCTYPE html> <html> <head><title>My site</title></head> <body> <!--#include "navbar.inc.html"--> <p>Foo</p> </body> </html> EOF <!DOCTYPE html> <html> <head><title>My site</title></head> <body> <header> <a href="/">My cool site</a> <nav> <ul> <li><a href="/blog.html">Blog</a></li> <li><a href="/about.html">About</a></li> </ul> </nav> </header> <p>Foo</p> </body> </html>That is... a cool trick! I don't know C, so it would have never occurred to me. (Let's be honest; it would have not occurred to me even if I knew C :))
What I like about the Bash + Heredocs + substitutions approach is that it looks and feels declarative to me. Template "expansion" is just in-place substitutions (parameter expansion, shell substitution, process substitution); no string munging needed to "place" or "inject" content in the HTML tree.
Anyway, I spent way too much time figuring that out, and it works well for me, so I'm going to just roll with the sunk costs :D
Thanks for sharing your approach!
> Within that machine lies Org-mode.
> ...
> Absolute maniacs run their finances, their spreadsheets,
> and their fragile grip on reality out of it.
Also...
OR... you could just use inotify again... Behold this abomination (that works so well (on my machine) I can't believe it):> I have to address the elephant in the room: > hot-rebuilding isn't true hot-reloading. > To get the browser to magically inject CSS without > a refresh requires WebSockets, background Node > processes, and a lot of external baggage.
... and a few functions later ...__shite_hot_cmd_browser_refresh() { local window_id=${1:?"Fail. We expect window ID to be set in scope."} printf "%s\n" \ "key --window ${window_id} --clearmodifiers 'F5'" } __shite_hot_cmd_goto_url() { local window_id=${1} local url=${2} printf "%s\n" \ "key --window ${window_id} --clearmodifiers 'ctrl+l'" \ "type --window ${window_id} --clearmodifiers --delay 1 ${url}" \ "key --window ${window_id} --clearmodifiers 'Return'" }
... and finally ...__shite_hot_cmd_exec() { # In debug mode, only show the actions, don't do them. if [[ ${SHITE_BUILD} == "hot" ]] then stdbuf -oL grep -v '^$' | __tap_stream | xdotool - else cat - fi } shite_hot_browser_reload() { local browser_window_id=${1:?"Fail. Window ID not set."} local base_url=${base_url:?"Fail. Base URL not set."} __shite_hot_cmd_public_events ${browser_window_id} ${base_url} | __shite_hot_cmd_exec }# RUN PIPELINE shite_hot_watch_file_events ${watch_dir} | __shite_events_dedupe | __tap_stream | tee >(shite_hot_build ${base_url}) | # Perform hot-reload actions only against changes to public files tee >(shite_hot_browser_reload ${window_id} ${base_url})
I really enjoyed reading this, the descent into madness sure did make for a fun ride. Lisp + rabbit holes gotta be one of my favourite literary genres. :D