Function explain

deps/npm/lib/utils/explain-eresolve.js:7–39

(expl, chalk, depth)

// Depth is how far we want to want to descend into the object making a report.
// The full report (ie, depth=Infinity) is always written to the cache folder at ${cache}/eresolve-report.txt along with full json.
const explain = (expl, chalk, depth) => {
  const { edge, dep, current, peerConflict, currentEdge } = expl

  const out = []
  const whileInstalling = dep && dep.whileInstalling ||
    current && current.whileInstalling ||
    edge && edge.from && edge.from.whileInstalling
  if (whileInstalling) {
    out.push('While resolving: ' + printNode(whileInstalling, chalk))
  }

  // it "should" be impossible for an ERESOLVE explanation to lack both current and currentEdge, but better to have a less helpful error than a crashing failure.
  if (current) {
    out.push('Found: ' + explainNode(current, depth, chalk))
  } else if (peerConflict && peerConflict.current) {
    out.push('Found: ' + explainNode(peerConflict.current, depth, chalk))
  } else if (currentEdge) {
    out.push('Found: ' + explainEdge(currentEdge, depth, chalk))
  } else /* istanbul ignore else - should always have one */ if (edge) {
    out.push('Found: ' + explainEdge(edge, depth, chalk))
  }

  out.push('\nCould not resolve dependency:\n' +
    explainEdge(edge, depth, chalk))

  if (peerConflict) {
    const heading = '\nConflicting peer dependency:'
    const pc = explainNode(peerConflict.peer, depth, chalk)
    out.push(heading + ' ' + pc)
  }

  return out.join('\n')
}

// generate a full verbose report and tell the user how to fix it
const report = (expl, chalk, noColorChalk) => {