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git.js

const Fetcher = require('./fetcher.js')
const FileFetcher = require('./file.js')
const RemoteFetcher = require('./remote.js')
const DirFetcher = require('./dir.js')
const hashre = /^[a-f0-9]{40}$/
const git = require('@npmcli/git')
const pickManifest = require('npm-pick-manifest')
const npa = require('npm-package-arg')
const { Minipass } = require('minipass')
const cacache = require('cacache')
const { log } = require('proc-log')
const npm = require('./util/npm.js')

const _resolvedFromRepo = Symbol('_resolvedFromRepo')
const _resolvedFromHosted = Symbol('_resolvedFromHosted')
const _resolvedFromClone = Symbol('_resolvedFromClone')
const _tarballFromResolved = Symbol.for('pacote.Fetcher._tarballFromResolved')
const _addGitSha = Symbol('_addGitSha')
const addGitSha = require('./util/add-git-sha.js')
const _clone = Symbol('_clone')
const _cloneHosted = Symbol('_cloneHosted')
const _cloneRepo = Symbol('_cloneRepo')
const _setResolvedWithSha = Symbol('_setResolvedWithSha')
const _prepareDir = Symbol('_prepareDir')
const _readPackageJson = Symbol.for('package.Fetcher._readPackageJson')

// get the repository url.
// prefer https if there's auth, since ssh will drop that.
// otherwise, prefer ssh if available (more secure).
// We have to add the git+ back because npa suppresses it.
const repoUrl = (h, opts) =>
  h.sshurl && !(h.https && h.auth) && addGitPlus(h.sshurl(opts)) ||
  h.https && addGitPlus(h.https(opts))

// add git+ to the url, but only one time.
const addGitPlus = url => url && `git+${url}`.replace(/^(git\+)+/, 'git+')

class GitFetcher extends Fetcher {
  constructor (spec, opts) {
    super(spec, opts)

// we never want to compare integrity for git dependencies: npm/rfcs#525
    if (this.opts.integrity) {
      delete this.opts.integrity
      log.warn(`skipping integrity check for git dependency ${this.spec.fetchSpec}`)
    }

this.resolvedRef = null
    if (this.spec.hosted) {
      this.from = this.spec.hosted.shortcut({ noCommittish: false })
    }

// shortcut: avoid full clone when we can go straight to the tgz
    // if we have the full sha and it's a hosted git platform
    if (this.spec.gitCommittish && hashre.test(this.spec.gitCommittish)) {
      this.resolvedSha = this.spec.gitCommittish
      // use hosted.tarball() when we shell to RemoteFetcher later
      this.resolved = this.spec.hosted
        ? repoUrl(this.spec.hosted, { noCommittish: false })
        : this.spec.rawSpec
    } else {
      this.resolvedSha = ''
    }

this.Arborist = opts.Arborist || null
  }

// just exposed to make it easier to test all the combinations
  static repoUrl (hosted, opts) {
    return repoUrl(hosted, opts)
  }

get types () {
    return ['git']
  }

resolve () {
    // likely a hosted git repo with a sha, so get the tarball url
    // but in general, no reason to resolve() more than necessary!
    if (this.resolved) {
      return super.resolve()
    }

// fetch the git repo and then look at the current hash
    const h = this.spec.hosted
    // try to use ssh, fall back to git.
    return h ? this[_resolvedFromHosted](h)
      : this[_resolvedFromRepo](this.spec.fetchSpec)
  }

// first try https, since that's faster and passphrase-less for
  // public repos, and supports private repos when auth is provided.
  // Fall back to SSH to support private repos
  // NB: we always store the https url in resolved field if auth
  // is present, otherwise ssh if the hosted type provides it
  [_resolvedFromHosted] (hosted) {
    return this[_resolvedFromRepo](hosted.https && hosted.https())
      .catch(er => {
        // Throw early since we know pathspec errors will fail again if retried
        if (er instanceof git.errors.GitPathspecError) {
          throw er
        }
        const ssh = hosted.sshurl && hosted.sshurl()
        // no fallthrough if we can't fall through or have https auth
        if (!ssh || hosted.auth) {
          throw er
        }
        return this[_resolvedFromRepo](ssh)
      })
  }

[_resolvedFromRepo] (gitRemote) {
    // XXX make this a custom error class
    if (!gitRemote) {
      return Promise.reject(new Error(`No git url for ${this.spec}`))
    }
    const gitRange = this.spec.gitRange
    const name = this.spec.name
    return git.revs(gitRemote, this.opts).then(remoteRefs => {
      return gitRange ? pickManifest({
        versions: remoteRefs.versions,
        'dist-tags': remoteRefs['dist-tags'],
        name,
      }, gitRange, this.opts)
        : this.spec.gitCommittish ?
          remoteRefs.refs[this.spec.gitCommittish] ||
          remoteRefs.refs[remoteRefs.shas[this.spec.gitCommittish]]
          : remoteRefs.refs.HEAD // no git committish, get default head
    }).then(revDoc => {
      // the committish provided isn't in the rev list
      // things like HEAD~3 or @yesterday can land here.
      if (!revDoc || !revDoc.sha) {
        return this[_resolvedFromClone]()
      }

this.resolvedRef = revDoc
      this.resolvedSha = revDoc.sha
      this[_addGitSha](revDoc.sha)
      return this.resolved
    })
  }

[_setResolvedWithSha] (withSha) {
    // we haven't cloned, so a tgz download is still faster
    // of course, if it's not a known host, we can't do that.
    this.resolved = !this.spec.hosted ? withSha
      : repoUrl(npa(withSha).hosted, { noCommittish: false })
  }

// when we get the git sha, we affix it to our spec to build up
  // either a git url with a hash, or a tarball download URL
  [_addGitSha] (sha) {
    this[_setResolvedWithSha](addGitSha(this.spec, sha))
  }

[_resolvedFromClone] () {
    // do a full or shallow clone, then look at the HEAD
    // kind of wasteful, but no other option, really
    return this[_clone](() => this.resolved)
  }

[_prepareDir] (dir) {
    return this[_readPackageJson](dir).then(mani => {
      // no need if we aren't going to do any preparation.
      const scripts = mani.scripts
      if (!mani.workspaces && (!scripts || !(
        scripts.postinstall ||
          scripts.build ||
          scripts.preinstall ||
          scripts.install ||
          scripts.prepack ||
          scripts.prepare))) {
        return
      }

// to avoid cases where we have an cycle of git deps that depend
      // on one another, we only ever do preparation for one instance
      // of a given git dep along the chain of installations.
      // Note that this does mean that a dependency MAY in theory end up
      // trying to run its prepare script using a dependency that has not
      // been properly prepared itself, but that edge case is smaller
      // and less hazardous than a fork bomb of npm and git commands.
      const noPrepare = !process.env._PACOTE_NO_PREPARE_ ? []
        : process.env._PACOTE_NO_PREPARE_.split('\n')
      if (noPrepare.includes(this.resolved)) {
        log.info('prepare', 'skip prepare, already seen', this.resolved)
        return
      }
      noPrepare.push(this.resolved)

// the DirFetcher will do its own preparation to run the prepare scripts
      // All we have to do is put the deps in place so that it can succeed.
      return npm(
        this.npmBin,
        [].concat(this.npmInstallCmd).concat(this.npmCliConfig),
        dir,
        { ...process.env, _PACOTE_NO_PREPARE_: noPrepare.join('\n') },
        { message: 'git dep preparation failed' }
      )
    })
  }

[_tarballFromResolved] () {
    const stream = new Minipass()
    stream.resolved = this.resolved
    stream.from = this.from

// check it out and then shell out to the DirFetcher tarball packer
    this[_clone](dir => this[_prepareDir](dir)
      .then(() => new Promise((res, rej) => {
        if (!this.Arborist) {
          throw new Error('GitFetcher requires an Arborist constructor to pack a tarball')
        }
        const df = new DirFetcher(`file:${dir}`, {
          ...this.opts,
          Arborist: this.Arborist,
          resolved: null,
          integrity: null,
        })
        const dirStream = df[_tarballFromResolved]()
        dirStream.on('error', rej)
        dirStream.on('end', res)
        dirStream.pipe(stream)
      }))).catch(
      /* istanbul ignore next: very unlikely and hard to test */
      er => stream.emit('error', er)
    )
    return stream
  }

// clone a git repo into a temp folder (or fetch and unpack if possible)
  // handler accepts a directory, and returns a promise that resolves
  // when we're done with it, at which point, cacache deletes it
  //
  // TODO: after cloning, create a tarball of the folder, and add to the cache
  // with cacache.put.stream(), using a key that's deterministic based on the
  // spec and repo, so that we don't ever clone the same thing multiple times.
  [_clone] (handler, tarballOk = true) {
    const o = { tmpPrefix: 'git-clone' }
    const ref = this.resolvedSha || this.spec.gitCommittish
    const h = this.spec.hosted
    const resolved = this.resolved

// can be set manually to false to fall back to actual git clone
    tarballOk = tarballOk &&
      h && resolved === repoUrl(h, { noCommittish: false }) && h.tarball

return cacache.tmp.withTmp(this.cache, o, async tmp => {
      // if we're resolved, and have a tarball url, shell out to RemoteFetcher
      if (tarballOk) {
        const nameat = this.spec.name ? `${this.spec.name}@` : ''
        return new RemoteFetcher(h.tarball({ noCommittish: false }), {
          ...this.opts,
          allowGitIgnore: true,
          pkgid: `git:${nameat}${this.resolved}`,
          resolved: this.resolved,
          integrity: null, // it'll always be different, if we have one
        }).extract(tmp).then(() => handler(tmp), er => {
          // fall back to ssh download if tarball fails
          if (er.constructor.name.match(/^Http/)) {
            return this[_clone](handler, false)
          } else {
            throw er
          }
        })
      }

const sha = await (
        h ? this[_cloneHosted](ref, tmp)
        : this[_cloneRepo](this.spec.fetchSpec, ref, tmp)
      )
      this.resolvedSha = sha
      if (!this.resolved) {
        await this[_addGitSha](sha)
      }
      return handler(tmp)
    })
  }

// first try https, since that's faster and passphrase-less for
  // public repos, and supports private repos when auth is provided.
  // Fall back to SSH to support private repos
  // NB: we always store the https url in resolved field if auth
  // is present, otherwise ssh if the hosted type provides it
  [_cloneHosted] (ref, tmp) {
    const hosted = this.spec.hosted
    return this[_cloneRepo](hosted.https({ noCommittish: true }), ref, tmp)
      .catch(er => {
        // Throw early since we know pathspec errors will fail again if retried
        if (er instanceof git.errors.GitPathspecError) {
          throw er
        }
        const ssh = hosted.sshurl && hosted.sshurl({ noCommittish: true })
        // no fallthrough if we can't fall through or have https auth
        if (!ssh || hosted.auth) {
          throw er
        }
        return this[_cloneRepo](ssh, ref, tmp)
      })
  }

[_cloneRepo] (repo, ref, tmp) {
    const { opts, spec } = this
    return git.clone(repo, ref, tmp, { ...opts, spec })
  }

manifest () {
    if (this.package) {
      return Promise.resolve(this.package)
    }

return this.spec.hosted && this.resolved
      ? FileFetcher.prototype.manifest.apply(this)
      : this[_clone](dir =>
        this[_readPackageJson](dir)
          .then(mani => this.package = {
            ...mani,
            _resolved: this.resolved,
            _from: this.from,
          }))
  }

packument () {
    return FileFetcher.prototype.packument.apply(this)
  }
}
module.exports = GitFetcher

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/root	drwxr-xr-x	2024-08-07 05:07:31
..	dir	-	root/root	drwxr-xr-x	2024-08-07 05:07:31
util	dir	-	root/root	drwxr-xr-x	2024-08-07 05:07:31
bin.js	text/plain	3.91 KB	root/root	-rwxr-xr-x	2024-07-17 04:40:36
dir.js	text/plain	2.95 KB	root/root	-rw-r--r--	2024-07-17 04:40:36
fetcher.js	text/plain	16.86 KB	root/root	-rw-r--r--	2024-07-17 04:40:36
file.js	text/plain	2.62 KB	root/root	-rw-r--r--	2024-07-17 04:40:36
git.js	text/plain	11.45 KB	root/root	-rw-r--r--	2024-07-17 04:40:36
index.js	text/plain	826 B	root/root	-rw-r--r--	2024-07-17 04:40:36
registry.js	text/plain	14.04 KB	root/root	-rw-r--r--	2024-07-17 04:40:36
remote.js	text/plain	2.74 KB	root/root	-rw-r--r--	2024-07-17 04:40:36