* first action! (#1)

node_modules/pacote/lib/fetchers/git.js

@@ -0,0 +1,178 @@
+'use strict'
+
+const BB = require('bluebird')
+
+const cacache = require('cacache')
+const cacheKey = require('../util/cache-key')
+const Fetcher = require('../fetch')
+const git = require('../util/git')
+const mkdirp = BB.promisify(require('mkdirp'))
+const pickManifest = require('npm-pick-manifest')
+const optCheck = require('../util/opt-check')
+const osenv = require('osenv')
+const packDir = require('../util/pack-dir')
+const PassThrough = require('stream').PassThrough
+const path = require('path')
+const pipe = BB.promisify(require('mississippi').pipe)
+const rimraf = BB.promisify(require('rimraf'))
+const uniqueFilename = require('unique-filename')
+
+// `git` dependencies are fetched from git repositories and packed up.
+const fetchGit = module.exports = Object.create(null)
+
+Fetcher.impl(fetchGit, {
+  packument (spec, opts) {
+    return BB.reject(new Error('Not implemented yet.'))
+  },
+
+  manifest (spec, opts) {
+    opts = optCheck(opts)
+    if (spec.hosted && spec.hosted.getDefaultRepresentation() === 'shortcut') {
+      return hostedManifest(spec, opts)
+    } else {
+      // If it's not a shortcut, don't do fallbacks.
+      return plainManifest(spec.fetchSpec, spec, opts)
+    }
+  },
+
+  tarball (spec, opts) {
+    opts = optCheck(opts)
+    const stream = new PassThrough()
+    this.manifest(spec, opts).then(manifest => {
+      stream.emit('manifest', manifest)
+      return pipe(
+        this.fromManifest(
+          manifest, spec, opts
+        ).on('integrity', i => stream.emit('integrity', i)), stream
+      )
+    }).catch(err => stream.emit('error', err))
+    return stream
+  },
+
+  fromManifest (manifest, spec, opts) {
+    opts = optCheck(opts)
+    let streamError
+    const stream = new PassThrough().on('error', e => { streamError = e })
+    const cacheName = manifest._uniqueResolved || manifest._resolved || ''
+    const cacheStream = (
+      opts.cache &&
+      cacache.get.stream(
+        opts.cache, cacheKey('packed-dir', cacheName), opts
+      ).on('integrity', i => stream.emit('integrity', i))
+    )
+    cacheStream.pipe(stream)
+    cacheStream.on('error', err => {
+      if (err.code !== 'ENOENT') {
+        return stream.emit('error', err)
+      } else {
+        stream.emit('reset')
+        return withTmp(opts, tmp => {
+          if (streamError) { throw streamError }
+          return cloneRepo(
+            spec, manifest._repo, manifest._ref, manifest._rawRef, tmp, opts
+          ).then(HEAD => {
+            if (streamError) { throw streamError }
+            manifest._resolved = spec.saveSpec.replace(/(:?#.*)?$/, `#${HEAD}`)
+            manifest._uniqueResolved = manifest._resolved
+            return packDir(manifest, manifest._uniqueResolved, tmp, stream, opts)
+          })
+        }).catch(err => stream.emit('error', err))
+      }
+    })
+    return stream
+  }
+})
+
+function hostedManifest (spec, opts) {
+  return BB.resolve(null).then(() => {
+    if (!spec.hosted.git()) {
+      throw new Error(`No git url for ${spec}`)
+    }
+    return plainManifest(spec.hosted.git(), spec, opts)
+  }).catch(err => {
+    if (!spec.hosted.https()) {
+      throw err
+    }
+    return plainManifest(spec.hosted.https(), spec, opts)
+  }).catch(err => {
+    if (!spec.hosted.sshurl()) {
+      throw err
+    }
+    return plainManifest(spec.hosted.sshurl(), spec, opts)
+  })
+}
+
+function plainManifest (repo, spec, opts) {
+  const rawRef = spec.gitCommittish || spec.gitRange
+  return resolve(
+    repo, spec, spec.name, opts
+  ).then(ref => {
+    if (ref) {
+      const resolved = spec.saveSpec.replace(/(?:#.*)?$/, `#${ref.sha}`)
+      return {
+        _repo: repo,
+        _resolved: resolved,
+        _spec: spec,
+        _ref: ref,
+        _rawRef: spec.gitCommittish || spec.gitRange,
+        _uniqueResolved: resolved,
+        _integrity: false,
+        _shasum: false
+      }
+    } else {
+      // We're SOL and need a full clone :(
+      //
+      // If we're confident enough that `rawRef` is a commit SHA,
+      // then we can at least get `finalize-manifest` to cache its result.
+      const resolved = spec.saveSpec.replace(/(?:#.*)?$/, rawRef ? `#${rawRef}` : '')
+      return {
+        _repo: repo,
+        _rawRef: rawRef,
+        _resolved: rawRef && rawRef.match(/^[a-f0-9]{40}$/) && resolved,
+        _uniqueResolved: rawRef && rawRef.match(/^[a-f0-9]{40}$/) && resolved,
+        _integrity: false,
+        _shasum: false
+      }
+    }
+  })
+}
+
+function resolve (url, spec, name, opts) {
+  const isSemver = !!spec.gitRange
+  return git.revs(url, opts).then(remoteRefs => {
+    return isSemver
+      ? pickManifest({
+        versions: remoteRefs.versions,
+        'dist-tags': remoteRefs['dist-tags'],
+        name: name
+      }, spec.gitRange, opts)
+      : remoteRefs
+        ? BB.resolve(
+          remoteRefs.refs[spec.gitCommittish] || remoteRefs.refs[remoteRefs.shas[spec.gitCommittish]]
+        )
+        : null
+  })
+}
+
+function withTmp (opts, cb) {
+  if (opts.cache) {
+    // cacache has a special facility for working in a tmp dir
+    return cacache.tmp.withTmp(opts.cache, { tmpPrefix: 'git-clone' }, cb)
+  } else {
+    const tmpDir = path.join(osenv.tmpdir(), 'pacote-git-tmp')
+    const tmpName = uniqueFilename(tmpDir, 'git-clone')
+    const tmp = mkdirp(tmpName).then(() => tmpName).disposer(rimraf)
+    return BB.using(tmp, cb)
+  }
+}
+
+// Only certain whitelisted hosted gits support shadow cloning
+const SHALLOW_HOSTS = new Set(['github', 'gist', 'gitlab', 'bitbucket'])
+function cloneRepo (spec, repo, resolvedRef, rawRef, tmp, opts) {
+  const ref = resolvedRef ? resolvedRef.ref : rawRef
+  if (resolvedRef && spec.hosted && SHALLOW_HOSTS.has(spec.hosted.type)) {
+    return git.shallow(repo, ref, tmp, opts)
+  } else {
+    return git.clone(repo, ref, tmp, opts)
+  }
+}