grab.js

'use strict'
const paths = require('path')
const mvn = require('./mvn')
const buck = require('./buck')
const syms = require('./syms')
const ops = require('./ops')

const byTarget = {}
const byPath = {}
const GEN_BANNER = '# generated by `node up --grab`, manual edits will be overridden'
// simple session-level (single cli execution) memoization of what have been generated
const wasGenerated = {}

function toBuckRule(g) {
  return buck.ruleRemoteFile(g.target, g.coords, g.type, g.ext, g.ext + mvn.EXT.sum)
}

module.exports = {
  stage(target, coords, options) {
    options = options || {}
    target = buck.target(target)
    coords = mvn.coords(coords, options)
    let ext = options.ext || paths.extname(target.goal) || mvn.EXT.jar
    let type = options.type || 'data'
    let key = String(target)

    let grabee = byTarget[key] || (byTarget[key] = {
      target, coords, options, ext, type
    })
    ;(byPath[target.path] || (byPath[target.path] = [])).push(grabee)
  },

  genBuckfiles() {
    for (let p in byPath) this.genBuckfile(p)
  },

  genBuckfile(path) {
    if (path in wasGenerated) return
    let content = [
        GEN_BANNER,
        ...(byPath[path] || []).map(toBuckRule)
    ].join('\n')
    ops.write(paths.join(path, 'BUCK'), content)
    wasGenerated[path] = true
  },

  get(target) {
    let r = buck.info(target)[0]
    return r && syms.outputOf(r)
  }
}