exercism 2.3.0

use upstream vendor directory
fix head url

Closes #3789.

Signed-off-by: ilovezfs <ilovezfs@icloud.com>

Formula/exercism.rb

@@ -1,11 +1,9 @@
-require "language/go"
-
 class Exercism < Formula
   desc "command-line tool to interact with exercism.io"
   homepage "http://cli.exercism.io"
-  url "https://github.com/exercism/cli/archive/v2.2.6.tar.gz"
-  sha256 "92a33052c497d03ace85f4c62f64e59c6a08f8ecd0cc03401f490412781d1116"
-  head "https://github.com/exercism.git"
+  url "https://github.com/exercism/cli/archive/v2.3.0.tar.gz"
+  sha256 "ca1432af80f9257c4c06107d0d1732845d49ac450f56ea04bcf58ead46d0af74"
+  head "https://github.com/exercism/cli.git"
 
   bottle do
     cellar :any_skip_relocation
@@ -16,45 +14,16 @@ class Exercism < Formula
 
   depends_on "go" => :build
 
-  go_resource "github.com/codegangsta/cli" do
-    url "https://github.com/codegangsta/cli.git",
-      :revision => "bca61c476e3c752594983e4c9bcd5f62fb09f157"
-  end
-
-  go_resource "github.com/kardianos/osext" do
-    url "https://github.com/kardianos/osext.git",
-      :revision => "6e7f843663477789fac7c02def0d0909e969b4e5"
-  end
-
-  go_resource "golang.org/x/net" do
-    url "https://github.com/golang/net.git",
-      :revision => "d9558e5c97f85372afee28cf2b6059d7d3818919"
-  end
-
-  go_resource "golang.org/x/text" do
-    url "https://github.com/golang/text.git",
-      :revision => "3eb7007b740b66a77f3c85f2660a0240b284115a"
-  end
-
   def install
-    ENV["GOBIN"] = bin
     ENV["GOPATH"] = buildpath
-    ENV["GOHOME"] = buildpath
-
-    path = buildpath/"src/github.com/exercism/cli"
-    path.install Dir["*"]
-
-    Language::Go.stage_deps resources, buildpath/"src"
-
-    cd path do
-      system "go", "build", "./exercism/main.go"
+    (buildpath/"src/github.com/exercism/cli").install buildpath.children
+    cd "src/github.com/exercism/cli" do
+      system "go", "build", "-o", bin/"exercism", "exercism/main.go"
+      prefix.install_metafiles
     end
-
-    bin.install path/"main" => "exercism"
   end
 
   test do
-    assert_equal "exercism version #{version}",
-      shell_output("#{bin}/exercism --version").strip
+    assert_match version.to_s, shell_output("#{bin}/exercism --version")
   end
 end