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explain-dep.js3.0 KB · 104 lines
const { relative } = require('node:path') const explainNode = (node, depth, chalk) =>  printNode(node, chalk) +  explainDependents(node, depth, chalk) +  explainLinksIn(node, depth, chalk) const colorType = (type, chalk) => {  const style = type === 'extraneous' ? chalk.red    : type === 'dev' ? chalk.blue    : type === 'optional' ? chalk.magenta    : type === 'peer' ? chalk.magentaBright    : type === 'bundled' ? chalk.underline.cyan    : type === 'workspace' ? chalk.blueBright    : type === 'overridden' ? chalk.dim    : /* istanbul ignore next */ s => s  return style(type)} const printNode = (node, chalk) => {  const extra = []   for (const meta of ['extraneous', 'dev', 'optional', 'peer', 'bundled', 'overridden']) {    if (node[meta]) {      extra.push(` ${colorType(meta, chalk)}`)    }  }   const pkgid = node.isWorkspace    ? chalk.blueBright(`${node.name}@${node.version}`)    : `${node.name}@${node.version}`   return `${pkgid}${extra.join('')}` +    (node.location ? chalk.dim(`\n${node.location}`) : '')} const explainLinksIn = ({ linksIn }, depth, chalk) => {  if (!linksIn || !linksIn.length || depth <= 0) {    return ''  }   const messages = linksIn.map(link => explainNode(link, depth - 1, chalk))  const str = '\n' + messages.join('\n')  return str.split('\n').join('\n  ')} const explainDependents = ({ dependents }, depth, chalk) => {  if (!dependents || !dependents.length || depth <= 0) {    return ''  }   const max = Math.ceil(depth / 2)  const messages = dependents.slice(0, max)    .map(edge => explainEdge(edge, depth, chalk))   // show just the names of the first 5 deps that overflowed the list  if (dependents.length > max) {    let len = 0    const maxLen = 50    const showNames = []    for (let i = max; i < dependents.length; i++) {      const { from: { name: depName = 'the root project' } } = dependents[i]      len += depName.length      if (len >= maxLen && i < dependents.length - 1) {        showNames.push('...')        break      }      showNames.push(depName)    }    const show = `(${showNames.join(', ')})`    messages.push(`${dependents.length - max} more ${show}`)  }   const str = '\n' + messages.join('\n')  return str.split('\n').join('\n  ')} const explainEdge = ({ name, type, bundled, from, spec, rawSpec, overridden }, depth, chalk) => {  let dep = type === 'workspace'    ? chalk.bold(relative(from.location, spec.slice('file:'.length)))    : `${name}@"${spec}"`  if (overridden) {    dep = `${colorType('overridden', chalk)} ${dep} (was "${rawSpec}")`  }   const fromMsg = ` from ${explainFrom(from, depth, chalk)}`   return (type === 'prod' ? '' : `${colorType(type, chalk)} `) +    (bundled ? `${colorType('bundled', chalk)} ` : '') +    `${dep}${fromMsg}`} const explainFrom = (from, depth, chalk) => {  if (!from.name && !from.version) {    return 'the root project'  }   return printNode(from, chalk) +    explainDependents(from, depth - 1, chalk) +    explainLinksIn(from, depth - 1, chalk)} module.exports = { explainNode, printNode, explainEdge }