1 files changed, 87 insertions, 0 deletions
diff --git a/node_modules/pacote/extract.js b/node_modules/pacote/extract.js
new file mode 100644
index 000000000..696aa5e1d
--- /dev/null
+++ b/node_modules/pacote/extract.js
@@ -0,0 +1,87 @@
+'use strict'
+
+const BB = require('bluebird')
+
+const cacache = require('cacache')
+const extractStream = require('./lib/extract-stream')
+const npa = require('npm-package-arg')
+const pipe = BB.promisify(require('mississippi').pipe)
+const optCheck = require('./lib/util/opt-check')
+const retry = require('promise-retry')
+const rimraf = BB.promisify(require('rimraf'))
+
+module.exports = extract
+function extract (spec, dest, opts) {
+  opts = optCheck(opts)
+  spec = typeof spec === 'string' ? npa(spec, opts.where) : spec
+  const startTime = Date.now()
+  if (opts.integrity && opts.cache && !opts.preferOnline) {
+    opts.log.silly('pacote', `trying ${spec} by hash: ${opts.integrity}`)
+    return extractByDigest(
+      startTime, spec, dest, opts
+    ).catch(err => {
+      if (err.code === 'ENOENT') {
+        opts.log.silly('pacote', `data for ${opts.integrity} not present. Using manifest.`)
+        return extractByManifest(startTime, spec, dest, opts)
+      }
+
+      if (err.code === 'EINTEGRITY' || err.code === 'Z_DATA_ERROR') {
+        opts.log.warn('pacote', `cached data for ${spec} (${opts.integrity}) seems to be corrupted. Refreshing cache.`)
+      }
+      return cleanUpCached(
+        dest, opts.cache, opts.integrity, opts
+      ).then(() => {
+        return extractByManifest(startTime, spec, dest, opts)
+      })
+    })
+  } else {
+    opts.log.silly('pacote', 'no tarball hash provided for', spec.name, '- extracting by manifest')
+    return retry((tryAgain, attemptNum) => {
+      return extractByManifest(
+        startTime, spec, dest, opts
+      ).catch(err => {
+        // Retry once if we have a cache, to clear up any weird conditions.
+        // Don't retry network errors, though -- make-fetch-happen has already
+        // taken care of making sure we're all set on that front.
+        if (opts.cache && !err.code.match(/^E\d{3}$/)) {
+          if (err.code === 'EINTEGRITY' || err.code === 'Z_DATA_ERROR') {
+            opts.log.warn('pacote', `tarball data for ${spec} (${opts.integrity}) seems to be corrupted. Trying one more time.`)
+          }
+          return cleanUpCached(
+            dest, opts.cache, err.sri, opts
+          ).then(() => tryAgain(err))
+        } else {
+          throw err
+        }
+      })
+    }, {retries: 1})
+  }
+}
+
+function extractByDigest (start, spec, dest, opts) {
+  const xtractor = extractStream(dest, opts)
+  const cached = cacache.get.stream.byDigest(opts.cache, opts.integrity, opts)
+  return pipe(cached, xtractor).then(() => {
+    opts.log.verbose('pacote', `${spec} extracted to ${dest} by content address ${Date.now() - start}ms`)
+  })
+}
+
+let fetch
+function extractByManifest (start, spec, dest, opts) {
+  const xtractor = extractStream(dest, opts)
+  return BB.resolve(null).then(() => {
+    if (!fetch) {
+      fetch = require('./lib/fetch')
+    }
+    return pipe(fetch.tarball(spec, opts), xtractor)
+  }).then(() => {
+    opts.log.verbose('pacote', `${spec} extracted in ${Date.now() - start}ms`)
+  })
+}
+
+function cleanUpCached (dest, cachePath, integrity, opts) {
+  return BB.join(
+    rimraf(dest),
+    cacache.rm.content(cachePath, integrity, opts)
+  )
+}