lxc: Simplify formula

This does the following:
 - Use the official release tarballs from upstream
 - Use the embedded copies of all needed dependencies

That should greatly simplify the maintenance of this formula going
forward (only need to update the URL and sha256) and ensures that what's
shipped matches what upstream tested.

Upstream LXD CI does test the build on MacOS before generating the
release tarball, so using the dependencies we ship should be much more
reliable than pinning on random upstream hashes.

Signed-off-by: Stéphane Graber <stgraber@ubuntu.com>

Closes #11442.

Signed-off-by: JCount <JCount42@gmail.com>

Formula/lxc.rb

@@ -1,10 +1,9 @@
-require "language/go"
-
 class Lxc < Formula
   desc "CLI client for interacting with LXD"
   homepage "https://linuxcontainers.org"
-  url "https://github.com/lxc/lxd/archive/lxd-2.12.tar.gz"
-  sha256 "8cc4143be017c1f6c70489c5745903fa8798acb7ed03f743b543689746eceb9f"
+  url "https://linuxcontainers.org/downloads/lxd/lxd-2.12.tar.gz"
+  sha256 "439bdadc7c63c523999a8d26b274a5c1c397d897197b43df8ce4b225a75585ff"
+  revision 1
 
   bottle do
     cellar :any_skip_relocation
@@ -15,107 +14,12 @@ class Lxc < Formula
 
   depends_on "go" => :build
 
-  go_resource "github.com/dustinkirkland/golang-petname" do
-    url "https://github.com/dustinkirkland/golang-petname.git",
-        :revision => "242afa0b4f8af1fa581e7ea7f4b6d51735fa3fef"
-  end
-
-  go_resource "github.com/golang/protobuf" do
-    url "https://github.com/golang/protobuf.git",
-        :revision => "8ee79997227bf9b34611aee7946ae64735e6fd93"
-  end
-
-  go_resource "github.com/gorilla/mux" do
-    url "https://github.com/gorilla/mux.git",
-        :revision => "392c28fe23e1c45ddba891b0320b3b5df220beea"
-  end
-
-  go_resource "github.com/gorilla/websocket" do
-    url "https://github.com/gorilla/websocket.git",
-        :revision => "c36f2fe5c330f0ac404b616b96c438b8616b1aaf"
-  end
-
-  go_resource "github.com/mattn/go-colorable" do
-    url "https://github.com/mattn/go-colorable.git",
-        :revision => "d228849504861217f796da67fae4f6e347643f15"
-  end
-
-  go_resource "github.com/mattn/go-runewidth" do
-    url "https://github.com/mattn/go-runewidth.git",
-        :revision => "14207d285c6c197daabb5c9793d63e7af9ab2d50"
-  end
-
-  go_resource "github.com/mattn/go-sqlite3" do
-    url "https://github.com/mattn/go-sqlite3.git",
-        :revision => "ce9149a3c941c30de51a01dbc5bc414ddaa52927"
-  end
-
-  go_resource "github.com/olekukonko/tablewriter" do
-    url "https://github.com/olekukonko/tablewriter.git",
-        :revision => "febf2d34b54a69ce7530036c7503b1c9fbfdf0bb"
-  end
-
-  go_resource "github.com/pborman/uuid" do
-    url "https://github.com/pborman/uuid.git",
-        :revision => "1b00554d822231195d1babd97ff4a781231955c9"
-  end
-
-  go_resource "github.com/stretchr/testify" do
-    url "https://github.com/stretchr/testify.git",
-        :revision => "4d4bfba8f1d1027c4fdbe371823030df51419987"
-  end
-
-  go_resource "github.com/syndtr/gocapability" do
-    url "https://github.com/syndtr/gocapability.git",
-        :revision => "e7cb7fa329f456b3855136a2642b197bad7366ba"
-  end
-
-  go_resource "golang.org/x/crypto" do
-    url "https://go.googlesource.com/crypto.git",
-        :revision => "bed12803fa9663d7aa2c2346b0c634ad2dcd43b7"
-  end
-
-  go_resource "golang.org/x/net" do
-    url "https://go.googlesource.com/net.git",
-        :revision => "41bba8d80bbfab43231ffdf4c210037baae5f6a3"
-  end
-
-  go_resource "gopkg.in/flosch/pongo2.v3" do
-    url "https://github.com/flosch/pongo2.git",
-        :revision => "5e81b817a0c48c1c57cdf1a9056cf76bdee02ca9"
-  end
-
-  go_resource "gopkg.in/inconshreveable/log15.v2" do
-    url "https://github.com/inconshreveable/log15.git",
-        :revision => "b105bd37f74e5d9dc7b6ad7806715c7a2b83fd3f"
-  end
-
-  go_resource "gopkg.in/lxc/go-lxc.v2" do
-    url "https://github.com/lxc/go-lxc.git",
-        :revision => "82a07a67a43089687c0cc71ad515cde8d8ae3b8f"
-  end
-
-  go_resource "gopkg.in/tomb.v2" do
-    url "https://github.com/go-tomb/tomb.git",
-        :revision => "d5d1b5820637886def9eef33e03a27a9f166942c"
-  end
-
-  go_resource "gopkg.in/yaml.v2" do
-    url "https://github.com/go-yaml/yaml.git",
-        :revision => "4c78c975fe7c825c6d1466c42be594d1d6f3aba6"
-  end
-
   def install
     ENV["GOPATH"] = buildpath
     ENV["GOBIN"] = bin
 
-    (buildpath/"src/github.com/lxc/lxd").install buildpath.children
-    Language::Go.stage_deps resources, buildpath/"src"
-
-    cd "src/github.com/lxc/lxd" do
-      system "go", "install", "-v", "./lxc"
-      prefix.install_metafiles
-    end
+    ln_s buildpath/"dist/src", buildpath/"src"
+    system "go", "install", "-v", "github.com/lxc/lxd/lxc"
   end
 
   test do