nvm 0.27.1

Closes Homebrew/homebrew#43795.

Closes Homebrew/homebrew#44394.

Signed-off-by: Dominyk Tiller <dominyktiller@gmail.com>

Formula/nvm.rb

@@ -1,8 +1,8 @@
 class Nvm < Formula
   desc "Manage multiple Node.js versions"
   homepage "https://github.com/creationix/nvm"
-  url "https://github.com/creationix/nvm/archive/v0.26.1.tar.gz"
-  sha256 "6add56210bd3a60517fea64eef11de01f5abfd5a23ca62c68ade9f115475b864"
+  url "https://github.com/creationix/nvm/archive/v0.27.1.tar.gz"
+  sha256 "74f843bf743017c086ea0c2549999afb0c81d8f5fa8bd2fdc92da37617e5b279"
   head "https://github.com/creationix/nvm.git"
 
   bottle do
@@ -13,38 +13,34 @@ class Nvm < Formula
     sha256 "262c46a1496abb2b060a46c19ce05eb36043e2c06c29e77f90c77d64639b2870" => :mountain_lion
   end
 
-  resource "nvm-exec" do
-    url "https://raw.githubusercontent.com/creationix/nvm/v0.26.1/nvm-exec"
-    sha256 "a0581795f10114b9759992a82a43496daf4b4a52ad381a3072d8eee9866a28c5"
-    version "0.26.1"
-  end
-
   def install
-    prefix.install "nvm.sh"
+    prefix.install "nvm.sh", "nvm-exec"
     bash_completion.install "bash_completion" => "nvm"
-
-    resource("nvm-exec").stage do
-      prefix.install("nvm-exec")
-      chmod 0755, "#{prefix}/nvm-exec"
-    end
   end
 
   def caveats; <<-EOS.undent
-      Add NVM's working directory to your $HOME path (if it doesn't exist):
+      You should create NVM's working directory if it doesn't exist:
 
         mkdir ~/.nvm
 
-      Copy nvm-exec to NVM's working directory
-
-        cp $(brew --prefix nvm)/nvm-exec ~/.nvm/
-
-      Add the following to $HOME/.bashrc, $HOME/.zshrc, or your shell's
-      equivalent configuration file:
+      Add the following to #{shell_profile} or your desired shell
+      configuration file:
 
         export NVM_DIR=~/.nvm
         source $(brew --prefix nvm)/nvm.sh
 
+      You can set $NVM_DIR to any location, but leaving it unchanged from
+      #{prefix} will destroy any nvm-installed Node installations
+      upon upgrade/reinstall.
+
       Type `nvm help` for further information.
     EOS
   end
+
+  test do
+    output = pipe_output("#{prefix}/nvm-exec 2>&1")
+    assert_no_match /No such file or directory/, output
+    assert_no_match /nvm: command not found/, output
+    assert_match /Node Version Manager/, output
+  end
 end