ipfs/src/cli/commands/object/patch/append-data.js

JavaScript implementation of the IPFS specification

'use strict'

const bl = require('bl')
const fs = require('fs')
const multibase = require('multibase')
const { print } = require('../../../utils')
const { cidToString } = require('../../../../utils/cid')

module.exports = {
  command: 'append-data <root> [data]',

  describe: 'Append data to the data segment of a dag node',

  builder: {
    'cid-base': {
      describe: 'Number base to display CIDs in. Note: specifying a CID base for v0 CIDs will have no effect.',
      type: 'string',
      choices: multibase.names
    }
  },

  handler (argv) {
    argv.resolve((async () => {
      let data

      if (argv.data) {
        data = fs.readFileSync(argv.data)
      } else {
        data = await new Promise((resolve, reject) => {
          process.stdin.pipe(bl((err, input) => {
            if (err) return reject(err)
            resolve(input)
          }))
        })
      }

      const ipfs = await argv.getIpfs()
      const cid = await ipfs.object.patch.appendData(argv.root, data, {
        enc: 'base58'
      })

      print(cidToString(cid, { base: argv.cidBase, upgrade: false }))
    })())
  }
}