9ed439bfbd
Couldn't sleep, so I made a surprisingly neat way to render HTML
documents in Nix using our favorite feature __findFile:
let
inherit (depot.users.sterni.nix.html) __findFile esc;
in
<html> {} [
(<head> {} [
(<meta> { charset = "utf-8"; } null)
(<title> {} (esc "hello"))
])
(<body> {} [
(<h1> {} (esc "hello world"))
])
]
=> "<html><head><meta charset=\"utf-8\"/><title>hello</title></head><body><h1>hello world</h1></body></html>"
Change-Id: Id36808a56ae3da3b5263c06f29342fc22d105c21
Reviewed-on: https://cl.tvl.fyi/c/depot/+/3410
Tested-by: BuildkiteCI
Reviewed-by: tazjin <mail@tazj.in>
84 lines
2.1 KiB
Nix
84 lines
2.1 KiB
Nix
{ depot, pkgs, ... }:
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let
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inherit (depot.users.sterni.nix.html)
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__findFile
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esc
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withDoctype
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;
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exampleDocument = withDoctype (<html> { lang = "en"; } [
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(<head> {} [
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(<meta> { charset = "utf-8"; } null)
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(<title> {} "html.nix example document")
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(<link> {
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rel = "license";
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href = "https://code.tvl.fyi/about/LICENSE";
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type = "text/html";
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} null)
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(<style> {} (esc ''
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hgroup h2 {
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font-weight: normal;
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}
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dd {
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margin: 0;
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}
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''))
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])
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(<body> {} [
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(<main> {} [
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(<hgroup> {} [
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(<h1> {} (esc "html.nix"))
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(<h2> {} [
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(<em> {} "the")
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(esc " most cursed HTML DSL ever!")
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])
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])
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(<dl> {} [
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(<dt> {} [
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(esc "Q: Wait, it's all ")
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(<a> {
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href = "https://cl.tvl.fyi/q/hashtag:cursed";
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} (esc "cursed"))
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(esc " nix hacks?")
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])
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(<dd> {} (esc "A: Always has been. 🔫"))
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(<dt> {} (esc "Q: Why does this work?"))
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(<dd> {} [
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(esc "Because nix ")
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(<a> {
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href = "https://github.com/NixOS/nix/blob/293220bed5a75efc963e33c183787e87e55e28d9/src/libexpr/parser.y#L410-L416";
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} (esc "translates "))
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(<a> {
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href = "https://github.com/NixOS/nix/blob/293220bed5a75efc963e33c183787e87e55e28d9/src/libexpr/lexer.l#L100";
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} (esc "SPATH tokens"))
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(esc " like ")
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(<code> {} (esc "<nixpkgs>"))
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(esc " into calls to ")
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(<code> {} (esc "__findFile"))
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(esc " in the ")
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(<em> {} (esc "current"))
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(esc " scope.")
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])
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])
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])
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])
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]);
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in
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pkgs.runCommandNoCC "html.nix.html" {
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passAsFile = [ "exampleDocument" ];
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inherit exampleDocument;
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nativeBuildInputs = [ pkgs.html5validator ];
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} ''
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set -x
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test "${esc "<> && \" \'"}" = "<> && " '"
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# slow as hell unfortunately
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html5validator "$exampleDocumentPath"
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mv "$exampleDocumentPath" "$out"
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set +x
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''
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