nix lib/erb-to-html

lib/erb-to-html.js

@@ -1,91 +0,0 @@
-/* eslint-disable no-console */
-const visit = require('unist-util-visit')
-const cache = new Map()
-const ERB_BLOCK_PATTERN = /<%=[^%]+%>/g
-
-module.exports = options => {
-  const convert = converter(options)
-  return tree => {
-    visit(tree, 'code', node => {
-      const match = node.lang ? node.lang.match(/^[a-z]+/) : null
-      const lang = match ? match[0] : null
-      if (lang === 'erb' || lang === 'html') {
-        const erb = node.value
-        const html = convert(erb)
-        const remaining = html ? html.match(ERB_BLOCK_PATTERN) : null
-        if (html && !remaining) {
-          node.value = html
-          node.lang = node.lang.replace(/^erb/, 'html')
-        } else if (remaining) {
-          // console.warn(`Unable to convert ${remaining.length} ERB blocks:\n  ${remaining.join('  \n')}`)
-        } else {
-          // console.warn(`No conversions made in: ${erb}`)
-        }
-      } else {
-        // console.warn(`Unknown code block lang: ${node.lang}`)
-      }
-    })
-  }
-}
-
-function converter({methods = {}}) {
-  return erb => {
-    const blocks = erb.match(ERB_BLOCK_PATTERN)
-    if (blocks && blocks.length) {
-      let html = erb
-      // console.warn(`Replacing ${blocks.length} ERB block(s)...`)
-      for (const block of blocks) {
-        const output = convert(block)
-        if (output !== block) {
-          // const count = html.split(block).length - 1
-          // console.warn(`  found ${count} instances of "${block}"`)
-          html = replaceAll(html, block, output)
-          // console.warn(html)
-        }
-      }
-      return html
-    }
-  }
-
-  function convert(block) {
-    if (cache.has(block)) {
-      return cache.get(block)
-    }
-
-    // eslint-disable-next-line no-unused-vars
-    const [_, method, argString] = block.match(/<%= *(\w+)[ (]([^)]+)\)? *%>/)
-    const parts = argString.split(/, */)
-    const args = []
-    const kwargs = {}
-    let match
-    for (const part of parts) {
-      if ((match = part.match(/^:(.+) => (.+)$/))) {
-        kwargs[unquote(match[1])] = unquote(match[2])
-      } else if ((match = part.match(/^(.+): (.+)$/))) {
-        kwargs[unquote(match[1])] = unquote(match[2])
-      } else {
-        args.push(unquote(part))
-      }
-    }
-
-    if (typeof methods[method] === 'function') {
-      let output = methods[method](args, kwargs)
-      console.warn(`converted: ${block} -> ${output}`)
-      const escaped = block.replace('<', '').replace('>', '')
-      output = `<!--${escaped}-->\n${output}`
-      cache.set(block, output)
-      return output
-    } else {
-      console.warn(`No such ERB method implemented: "${method}"`)
-      return block
-    }
-  }
-}
-
-function replaceAll(str, input, output) {
-  return str.split(input).join(output)
-}
-
-function unquote(str) {
-  return str.replace(/^\s*"([^"]+)"\s*$/, (_, value) => value)
-}