fix pipe not emit finish on tarball in 0.10.30

lib/cache/add-remote-tarball.js

@@ -87,41 +87,33 @@ function fetchAndShaCheck (u, tmp, shasum, cb) {
       return cb(er, response)
     }
 
-    // mkdir takes a little while, so don't drop chunks!
-    response.pause()
-
-    mkdir(path.dirname(tmp), function (er) {
-      if (er) return cb(er)
+    var tarball = createWriteStream(tmp, { mode : npm.modes.file })
+    tarball.on("error", function (er) {
+      cb(er)
+      tarball.destroy()
+    })
 
-      var tarball = createWriteStream(tmp, { mode : npm.modes.file })
-      tarball.on("error", function (er) {
-        cb(er)
-        tarball.destroy()
-      })
+    tarball.on("finish", function () {
+      if (!shasum) {
+        // Well, we weren't given a shasum, so at least sha what we have
+        // in case we want to compare it to something else later
+        return sha.get(tmp, function (er, shasum) {
+          log.silly("fetchAndShaCheck", "shasum", shasum)
+          cb(er, response, shasum)
+        })
+      }
 
-      tarball.on("finish", function () {
-        if (!shasum) {
-          // Well, we weren't given a shasum, so at least sha what we have
-          // in case we want to compare it to something else later
-          return sha.get(tmp, function (er, shasum) {
-            log.silly("fetchAndShaCheck", "shasum", shasum)
-            cb(er, response, shasum)
-          })
+      // validate that the url we just downloaded matches the expected shasum.
+      log.silly("fetchAndShaCheck", "shasum", shasum)
+      sha.check(tmp, shasum, function (er) {
+        if (er && er.message) {
+          // add original filename for better debuggability
+          er.message = er.message + "\n" + "From:     " + u
         }
-
-        // validate that the url we just downloaded matches the expected shasum.
-        log.silly("fetchAndShaCheck", "shasum", shasum)
-        sha.check(tmp, shasum, function (er) {
-          if (er && er.message) {
-            // add original filename for better debuggability
-            er.message = er.message + "\n" + "From:     " + u
-          }
-          return cb(er, response, shasum)
-        })
+        return cb(er, response, shasum)
       })
-
-      response.pipe(tarball)
-      response.resume()
     })
+
+    response.pipe(tarball)
   })
 }