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  __  __    __   __  _____      _            _          _____ _          _ _ 
 |  \/  |   \ \ / / |  __ \    (_)          | |        / ____| |        | | |
 | \  / |_ __\ V /  | |__) | __ ___   ____ _| |_ ___  | (___ | |__   ___| | |
 | |\/| | '__|> <   |  ___/ '__| \ \ / / _` | __/ _ \  \___ \| '_ \ / _ \ | |
 | |  | | |_ / . \  | |   | |  | |\ V / (_| | ||  __/  ____) | | | |  __/ | |
 |_|  |_|_(_)_/ \_\ |_|   |_|  |_| \_/ \__,_|\__\___| |_____/|_| |_|\___V 2.1
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const { resolve } = require('node:path')
const semver = require('semver')
const libnpmdiff = require('libnpmdiff')
const npa = require('npm-package-arg')
const pacote = require('pacote')
const pickManifest = require('npm-pick-manifest')
const { log, output } = require('proc-log')
const pkgJson = require('@npmcli/package-json')
const BaseCommand = require('../base-cmd.js')

class Diff extends BaseCommand {
  static description = 'The registry diff command'
  static name = 'diff'
  static usage = [
    '[...<paths>]',
  ]

  static params = [
    'diff',
    'diff-name-only',
    'diff-unified',
    'diff-ignore-all-space',
    'diff-no-prefix',
    'diff-src-prefix',
    'diff-dst-prefix',
    'diff-text',
    'global',
    'tag',
    'workspace',
    'workspaces',
    'include-workspace-root',
  ]

  static workspaces = true
  static ignoreImplicitWorkspace = false

  async exec (args) {
    const specs = this.npm.config.get('diff').filter(d => d)
    if (specs.length > 2) {
      throw this.usageError(`Can't use more than two --diff arguments.`)
    }

    // execWorkspaces may have set this already
    if (!this.prefix) {
      this.prefix = this.npm.prefix
    }

    // this is the "top" directory, one up from node_modules
    // in global mode we have to walk one up from globalDir because our
    // node_modules is sometimes under ./lib, and in global mode we're only ever
    // walking through node_modules (because we will have been given a package
    // name already)
    if (this.npm.global) {
      this.top = resolve(this.npm.globalDir, '..')
    } else {
      this.top = this.prefix
    }

    const [a, b] = await this.retrieveSpecs(specs)
    log.info('diff', { src: a, dst: b })

    const res = await libnpmdiff([a, b], {
      ...this.npm.flatOptions,
      diffFiles: args,
      where: this.top,
    })
    return output.standard(res)
  }

  async execWorkspaces (args) {
    await this.setWorkspaces()
    for (const workspacePath of this.workspacePaths) {
      this.top = workspacePath
      this.prefix = workspacePath
      await this.exec(args)
    }
  }

  // get the package name from the packument at `path`
  // throws if no packument is present OR if it does not have `name` attribute
  async packageName () {
    let name
    try {
      const { content: pkg } = await pkgJson.normalize(this.prefix)
      name = pkg.name
    } catch (e) {
      log.verbose('diff', 'could not read project dir package.json')
    }

    if (!name) {
      throw this.usageError('Needs multiple arguments to compare or run from a project dir.')
    }

    return name
  }

  async retrieveSpecs ([a, b]) {
    if (a && b) {
      const specs = await this.convertVersionsToSpecs([a, b])
      return this.findVersionsByPackageName(specs)
    }

    // no arguments, defaults to comparing cwd
    // to its latest published registry version
    if (!a) {
      const pkgName = await this.packageName()
      return [
        `${pkgName}@${this.npm.config.get('tag')}`,
        `file:${this.prefix}`,
      ]
    }

    // single argument, used to compare wanted versions of an
    // installed dependency or to compare the cwd to a published version
    let noPackageJson
    let pkgName
    try {
      const { content: pkg } = await pkgJson.normalize(this.prefix)
      pkgName = pkg.name
    } catch (e) {
      log.verbose('diff', 'could not read project dir package.json')
      noPackageJson = true
    }

    const missingPackageJson =
      this.usageError('Needs multiple arguments to compare or run from a project dir.')

    // using a valid semver range, that means it should just diff
    // the cwd against a published version to the registry using the
    // same project name and the provided semver range
    if (semver.validRange(a)) {
      if (!pkgName) {
        throw missingPackageJson
      }
      return [
        `${pkgName}@${a}`,
        `file:${this.prefix}`,
      ]
    }

    // when using a single package name as arg and it's part of the current
    // install tree, then retrieve the current installed version and compare
    // it against the same value `npm outdated` would suggest you to update to
    const spec = npa(a)
    if (spec.registry) {
      let actualTree
      let node
      const Arborist = require('@npmcli/arborist')
      try {
        const opts = {
          ...this.npm.flatOptions,
          path: this.top,
        }
        const arb = new Arborist(opts)
        actualTree = await arb.loadActual(opts)
        node = actualTree &&
          actualTree.inventory.query('name', spec.name)
            .values().next().value
      } catch (e) {
        log.verbose('diff', 'failed to load actual install tree')
      }

      if (!node || !node.name || !node.package || !node.package.version) {
        if (noPackageJson) {
          throw missingPackageJson
        }
        return [
          `${spec.name}@${spec.fetchSpec}`,
          `file:${this.prefix}`,
        ]
      }

      const tryRootNodeSpec = () =>
        (actualTree && actualTree.edgesOut.get(spec.name) || {}).spec

      const tryAnySpec = () => {
        for (const edge of node.edgesIn) {
          return edge.spec
        }
      }

      const aSpec = `file:${node.realpath}`

      // finds what version of the package to compare against, if a exact
      // version or tag was passed than it should use that, otherwise
      // work from the top of the arborist tree to find the original semver
      // range declared in the package that depends on the package.
      let bSpec
      if (spec.rawSpec !== '*') {
        bSpec = spec.rawSpec
      } else {
        const bTargetVersion =
          tryRootNodeSpec()
          || tryAnySpec()

        // figure out what to compare against,
        // follows same logic to npm outdated "Wanted" results
        const packument = await pacote.packument(spec, {
          ...this.npm.flatOptions,
          preferOnline: true,
        })
        bSpec = pickManifest(
          packument,
          bTargetVersion,
          { ...this.npm.flatOptions }
        ).version
      }

      return [
        `${spec.name}@${aSpec}`,
        `${spec.name}@${bSpec}`,
      ]
    } else if (spec.type === 'directory') {
      return [
        `file:${spec.fetchSpec}`,
        `file:${this.prefix}`,
      ]
    } else {
      throw this.usageError(`Spec type ${spec.type} not supported.`)
    }
  }

  async convertVersionsToSpecs ([a, b]) {
    const semverA = semver.validRange(a)
    const semverB = semver.validRange(b)

    // both specs are semver versions, assume current project dir name
    if (semverA && semverB) {
      let pkgName
      try {
        const { content: pkg } = await pkgJson.normalize(this.prefix)
        pkgName = pkg.name
      } catch (e) {
        log.verbose('diff', 'could not read project dir package.json')
      }

      if (!pkgName) {
        throw this.usageError('Needs to be run from a project dir in order to diff two versions.')
      }

      return [`${pkgName}@${a}`, `${pkgName}@${b}`]
    }

    // otherwise uses the name from the other arg to
    // figure out the spec.name of what to compare
    if (!semverA && semverB) {
      return [a, `${npa(a).name}@${b}`]
    }

    if (semverA && !semverB) {
      return [`${npa(b).name}@${a}`, b]
    }

    // no valid semver ranges used
    return [a, b]
  }

  async findVersionsByPackageName (specs) {
    let actualTree
    const Arborist = require('@npmcli/arborist')
    try {
      const opts = {
        ...this.npm.flatOptions,
        path: this.top,
      }
      const arb = new Arborist(opts)
      actualTree = await arb.loadActual(opts)
    } catch (e) {
      log.verbose('diff', 'failed to load actual install tree')
    }

    return specs.map(i => {
      const spec = npa(i)
      if (spec.rawSpec !== '*') {
        return i
      }

      const node = actualTree
        && actualTree.inventory.query('name', spec.name)
          .values().next().value

      const res = !node || !node.package || !node.package.version
        ? spec.fetchSpec
        : `file:${node.realpath}`

      return `${spec.name}@${res}`
    })
  }
}

module.exports = Diff

Filemanager

Name Type Size Permission Actions
access.js File 6.04 KB 0644
adduser.js File 1.29 KB 0644
audit.js File 3.15 KB 0644
bugs.js File 847 B 0644
cache.js File 7.12 KB 0644
ci.js File 4.22 KB 0644
completion.js File 8.9 KB 0644
config.js File 11.18 KB 0644
dedupe.js File 1.41 KB 0644
deprecate.js File 2.13 KB 0644
diff.js File 8 KB 0644
dist-tag.js File 5.52 KB 0644
docs.js File 449 B 0644
doctor.js File 10.1 KB 0644
edit.js File 1.76 KB 0644
exec.js File 3.42 KB 0644
explain.js File 3.58 KB 0644
explore.js File 2.16 KB 0644
find-dupes.js File 634 B 0644
fund.js File 6.46 KB 0644
get.js File 577 B 0644
help-search.js File 5.52 KB 0644
help.js File 3.66 KB 0644
hook.js File 3.37 KB 0644
init.js File 6.85 KB 0644
install-ci-test.js File 373 B 0644
install-test.js File 370 B 0644
install.js File 5.15 KB 0644
link.js File 5.25 KB 0644
ll.js File 234 B 0644
login.js File 1.29 KB 0644
logout.js File 1.42 KB 0644
ls.js File 16.81 KB 0644
org.js File 4.02 KB 0644
outdated.js File 7.7 KB 0644
owner.js File 5.85 KB 0644
pack.js File 2.6 KB 0644
ping.js File 873 B 0644
pkg.js File 3.56 KB 0644
prefix.js File 335 B 0644
profile.js File 10.57 KB 0644
prune.js File 799 B 0644
publish.js File 7.38 KB 0644
query.js File 3.51 KB 0644
rebuild.js File 2.19 KB 0644
repo.js File 1.25 KB 0644
restart.js File 310 B 0644
root.js File 295 B 0644
run-script.js File 6.08 KB 0644
sbom.js File 4.51 KB 0644
search.js File 1.83 KB 0644
set.js File 671 B 0644
shrinkwrap.js File 2.65 KB 0644
star.js File 1.87 KB 0644
stars.js File 1.03 KB 0644
start.js File 300 B 0644
stop.js File 295 B 0644
team.js File 4.36 KB 0644
test.js File 295 B 0644
token.js File 6.02 KB 0644
uninstall.js File 1.52 KB 0644
unpublish.js File 5.27 KB 0644
unstar.js File 183 B 0644
update.js File 1.72 KB 0644
version.js File 3.54 KB 0644
view.js File 12.8 KB 0644
whoami.js File 527 B 0644