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