Convert globs into max 800 x 800 png files

convert-to-png.js

const fs = require('fs')
const path = require('path')
const sharp = require('sharp')
const globby = require('globby')
const { trace } = require('xtrace')
const { futurizeWithCancel, tacit } = require('ensorcel')
const { parallel, fork: rawFork, Future, chain } = require('fluture')
const { reduce, mergeRight, objOf, pipe, curryN, __: $, map } = require('ramda')
const yargsParser = require('yargs-parser')
const { writeFile, copyFile } = require('torpor')

const globWithCancel = futurizeWithCancel($, 1, globby)
const fork = tacit(3, rawFork)
const relativePath = curryN(2, path.resolve)

const IMAGE_DEFAULTS = {
  fit: 'outside',
  width: 800,
  height: 800,
  withoutEnlargement: true
}

const imageFuture = (image) => {
  const { dir, name } = path.parse(image)
  const output = path.join(dir, name + '.png')
  return new Future((bad, good) => {
    sharp(image)
      .resize(IMAGE_DEFAULTS)
      .png()
      .toBuffer()
      .catch(bad)
      .then((data) => {
        pipe(map(objOf(output)), fork(bad)(good))(writeFile(output, data, { flag: 'w' }))
      })
    return () => {}
  })
}

const run = (raw) =>
  pipe(
    trace('processing location:'),
    globWithCancel(() => {}),
    chain(pipe(map(imageFuture), parallel(10))),
    map(reduce(mergeRight, {})),
    fork(console.warn, console.log)
  )(raw)

const opts = yargsParser(process.argv.slice(2))
const { _: directoryWithAsterisks } = opts

run(`${directoryWithAsterisks}`)