git.r.bdr.sh - rbdr/blog/blob - lib/archivers/gemlog.js

   1 import Dot from 'dot';
   2 import { cp, mkdir, readdir, readFile, writeFile } from 'fs/promises';
   3 import { debuglog } from 'util';
   4 import { join } from 'path';
   5 import { rmIfExists } from '../utils.js';
   6
   7 const internals = {
   8   kIndexName: 'index.gmi',
   9   kGeminiRe: /\.gmi$/i,
  10
  11   debuglog: debuglog('blog'),
  12
  13   buildUrl(id, slug) {
  14
  15     return `./${id}/${slug}`;
  16   },
  17
  18   buildTitle(id, slug) {
  19
  20     const date = new Date(Number(id));
  21     const shortDate = date.toISOString().split('T')[0];
  22     const title = slug.split('-').join(' ');
  23     return `${shortDate} ${title}`;
  24   },
  25
  26   buildLink(id, slug) {
  27
  28     return `=> ${internals.buildUrl(id,slug)} ${internals.buildTitle(id,slug)}`;
  29   }
  30 };
  31
  32 export default async function (templateDirectory, source, target) {
  33
  34   internals.debuglog(`Reading archive ${source}`);
  35   const postIds = (await readdir(source))
  36     .sort((a, b) => Number(b) - Number(a));
  37   const posts = [];
  38   for (const id of postIds) {
  39     const postDirectory = join(source, id);
  40     const slug = (await readdir(postDirectory))
  41       .filter((entry) => internals.kGeminiRe.test(entry))[0];
  42
  43     posts.push({ id, slug });
  44   }
  45
  46   internals.debuglog(`Read ${posts.length} posts`);
  47
  48   internals.debuglog('Generating Archive Index');
  49   const indexLocation = join(templateDirectory, internals.kIndexName);
  50
  51   internals.debuglog(`Reading ${indexLocation}`);
  52   const indexTemplate = await readFile(indexLocation, { encoding: 'utf8' });
  53
  54   internals.debuglog('Writing Archive Index');
  55   const index = Dot.template(indexTemplate, {
  56     ...Dot.templateSettings,
  57     strip: false
  58   })({
  59     posts: posts.map((post) => internals.buildLink(post.id, post.slug)).join('\n')
  60   });
  61
  62   try {
  63     internals.debuglog('Removing index');
  64     await rmIfExists(target);
  65   }
  66   finally {
  67     internals.debuglog('Creating index');
  68     await mkdir(target);
  69     const indexFile = join(target, internals.kIndexName);
  70     await writeFile(indexFile, index);
  71
  72     internals.debuglog('Copying posts to archive');
  73     await cp(source, target, { recursive: true });
  74   }
  75 }