README

Task

• Find out whether images in the content/galleries galleries have changed.
• Updates the lastmod property in the front matter of the respective index.md.

In detail

• Scan the image files for each galleries/gallery-1 (bundle directory).
• For each bundle:
  • Compare image inventory with last run (cache)
  • Count changes: + added, ~ changed, − deleted
  • Insert or Update lastmod Property in index.md Frontmatter.
• Output:
  • Per bundle: Status + image diffs
  • Global: Total number of bundles and image changes
  • Writes a .hugo-update-lastmod.cache.json file in your projekt root folder.

Important features:

• No Git necessary – everything is based on the file system (hash, size).

Install

npm i -D hugo-update-lastmod
# or
npm install --save-dev hugo-update-lastmod
# or
yarn add --dev hugo-update-lastmod
# or
pnpm add -D hugo-update-lastmod

Setup

Create a hugo-update-lastmod.config.json in the root folder of your project:

{
  "targetDirs": [
    "content/galleries/*/",
    "content/stories/*/"
  ],
  "extensions": ["jpg", "jpeg", "png", "webp", "avif"],
  "maxDepth": 1,
  "frontmatterDelim": "---",
  "gitAdd": true
}

Add hugo-update-lastmod skript in your workflow:

"scripts": {
  "predev": "hugo-update-lastmod",
  "dev": "hugo server --disableFastRender --noHTTPCache",

  "prebuild": "hugo-update-lastmod",
  "build": "hugo --minify --gc",

  "clean": "find . -type f -name .DS_Store -delete && rm -rf public",
  "cleanbuild": "npm run clean && npm run build",
}

Enjoy :-)

The file hugo-update-lastmod.mjs is pure JavaScript, not TypeScript. Node.js can execute it directly as long as "type": "module" is in package.json or the file has the extension .mjs.

Links

• https://github.com/cnichte/hugo-update-lastmod
• https://www.npmjs.com/package/hugo-update-lastmod