95 lines
3 KiB
Nix
95 lines
3 KiB
Nix
# This file defines various fragments of the blog, such as the header
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# and footer, as functions that receive arguments to be templated into
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# them.
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#
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# An entire post is rendered by `renderPost`, which assembles the
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# fragments together in a runCommand execution.
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{ depot, lib, pkgs, ... }:
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let
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inherit (builtins) filter map hasAttr replaceStrings;
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inherit (pkgs) runCommandNoCC writeText;
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inherit (depot.nix) renderMarkdown;
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staticUrl = "https://static.tvl.fyi/${depot.web.static.drvHash}";
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# Generate a post list for all listed, non-draft posts.
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isDraft = post: (hasAttr "draft" post) && post.draft;
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isUnlisted = post: (hasAttr "listed" post) && !post.listed;
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escape = replaceStrings [ "<" ">" "&" "'" ] [ "<" ">" "&" "'" ];
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header = name: title: ''
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<!DOCTYPE html>
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<head>
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<meta charset="utf-8">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta name="description" content="${escape name}">
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<link rel="stylesheet" type="text/css" href="${staticUrl}/tvl.css" media="all">
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<link rel="icon" type="image/webp" href="/static/favicon.webp">
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<link rel="alternate" type="application/atom+xml" title="Atom Feed" href="https://tvl.fyi/feed.atom">
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<title>${escape name}: ${escape title}</title>
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</head>
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<body class="light">
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<header>
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<h1><a class="blog-title" href="/">${escape name}</a> </h1>
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<hr>
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</header>
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'';
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fullFooter = content: ''
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<hr>
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<footer>
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${content}
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</footer>
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</body>
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'';
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draftWarning = writeText "draft.html" ''
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<p class="cheddar-callout cheddar-warning">
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<b>Note:</b> This post is a <b>draft</b>! Please do not share
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the link to it without asking first.
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</p>
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<hr>
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'';
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unlistedWarning = writeText "unlisted.html" ''
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<p class="cheddar-callout cheddar-warning">
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<b>Note:</b> This post is <b>unlisted</b>! Please do not share
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the link to it without asking first.
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</p>
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<hr>
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'';
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renderPost = { name, footer, ... }: post: runCommandNoCC "${post.key}.html" {} ''
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cat ${writeText "header.html" (header name post.title)} > $out
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# Write the post title & date
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echo '<article><h2 class="inline">${escape post.title}</h2>' >> $out
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echo '<aside class="date">' >> $out
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date --date="@${toString post.date}" '+%Y-%m-%d' >> $out
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${
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if post ? updated
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then ''date --date="@${toString post.updated}" '+ (updated %Y-%m-%d)' >> $out''
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else ""
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}
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echo '</aside>' >> $out
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${
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# Add a warning to draft/unlisted posts to make it clear that
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# people should not share the post.
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if (isDraft post) then "cat ${draftWarning} >> $out"
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else if (isUnlisted post) then "cat ${unlistedWarning} >> $out"
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else "# Your ads could be here?"
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}
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# Write the actual post through cheddar's about-filter mechanism
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cat ${renderMarkdown post.content} >> $out
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echo '</article>' >> $out
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cat ${writeText "footer.html" (fullFooter footer)} >> $out
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'';
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in {
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inherit isDraft isUnlisted renderPost;
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}
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