Cache issue with ?pdf about marp-cli HOT 3 CLOSED

// engine.config.js
const crypto = require('crypto')

const imageUniqParameterPlugin = (markdownIt) => {
  const imageRuleIndex = markdownIt.inline.ruler.__find__('image')
  if (imageRuleIndex === -1) throw new Error('Parser rule not found: image')

  const originalImageRule = {
    ...markdownIt.inline.ruler.__rules__[imageRuleIndex],
  }

  // Replace existing markdown-it image rule to add unique parameter
  markdownIt.inline.ruler.at(
    'image',
    (state) => {
      const originalNormalizeLink = state.md.normalizeLink

      try {
        // Override normalizeLink to add unique parameter while parsing image
        state.md.normalizeLink = (url) => {
          try {
            const urlObj = new URL(url, 'dummy://dummy.dummy/')

            // Add unique parameter to avoid cache
            urlObj.searchParams.set('__marp_v__', crypto.randomUUID())
            let normalizedUrl = urlObj.toString()

            if (normalizedUrl.startsWith('dummy://dummy.dummy/')) {
              // Remove dummy protocol and host
              normalizedUrl = normalizedUrl.slice(20)
            }

            return originalNormalizeLink(normalizedUrl)
          } catch (e) {
            console.warn(e)

            // Fallback to original normalizeLink if URL parsing failed
            return originalNormalizeLink(url)
          }
        }

        return originalImageRule.fn(state)
      } finally {
        // Restore original normalizeLink
        state.md.normalizeLink = originalNormalizeLink
      }
    },
    { alt: originalImageRule.alt }
  )
}

module.exports = {
  engine: ({ marp }) => marp.use(imageUniqParameterPlugin),
}