@zazuko/vocabularies/bin/vocab.js

Access most commonly used RDF ontologies/schemas/vocabularies as datasets or n-quads

#!/usr/bin/env node
/* eslint-disable no-console */
import { promisify } from 'util'
import { program } from 'commander'
import stream from 'readable-stream'
import { loadDatasetStream } from '@zazuko/vocabulary-loader/lib/loadDataset.js'
import prefixes from '../prefixes.js'

const finished = promisify(stream.finished)

async function forwardStream(prefix) {
  const vocabStream = await loadDatasetStream(prefix)
  vocabStream.pipe(process.stdout)

  return finished(vocabStream)
    .catch(e => {
      console.error('Failed to load vocabulary. Is the prefix correct?')
      throw e
    })
}

program
  .command('namespace <namespace>')
  .action((namespace) => {
    const [prefix] = Object.entries(prefixes.default)
      .find(([, ns]) => ns === namespace)

    if (!prefix) {
      console.error('Failed to load vocabulary. Namespace not found')
      process.exit(1)
    }

    return forwardStream(prefix)
  })

program
  .command('prefix <prefix>')
  .action(forwardStream)

program.parseAsync(process.argv).catch(() => process.exit(1))