Merge pull request #2623 from rednoah/master

Support GPG (signed data) container in Homebrew Cask

Library/Homebrew/cask/lib/hbc/container.rb

@@ -6,6 +6,7 @@ require "hbc/container/criteria"
 require "hbc/container/dmg"
 require "hbc/container/executable"
 require "hbc/container/generic_unar"
+require "hbc/container/gpg"
 require "hbc/container/gzip"
 require "hbc/container/lzma"
 require "hbc/container/naked"
@@ -40,6 +41,7 @@ module Hbc
         Gzip,  # pure gzip
         Lzma,  # pure lzma
         Xz,    # pure xz
+        Gpg,   # GnuPG signed data
         Executable,
       ]
       # for explicit use only (never autodetected):

Library/Homebrew/cask/lib/hbc/container/gpg.rb

@@ -0,0 +1,41 @@
+require "tmpdir"
+
+require "hbc/container/base"
+
+module Hbc
+  class Container
+    class Gpg < Base
+      def self.me?(criteria)
+        criteria.extension(/^(gpg)$/)
+      end
+
+      def import_key
+        if @cask.gpg.nil?
+          raise CaskError, "Expected to find gpg public key in formula. Cask '#{@cask}' must add: 'gpg :embedded, key_id: [Public Key ID]' or 'gpg :embedded, key_url: [Public Key URL]'"
+        end
+
+        args = if @cask.gpg.key_id
+          ["--recv-keys", @cask.gpg.key_id]
+        elsif @cask.gpg.key_url
+          ["--fetch-key", @cask.gpg.key_url.to_s]
+        end
+
+        @command.run!("gpg", args: args)
+      end
+
+      def extract
+        if (gpg = which("gpg")).nil?
+          raise CaskError, "Expected to find gpg executable. Cask '#{@cask}' must add: depends_on formula: 'gpg'"
+        end
+
+        import_key
+
+        Dir.mktmpdir do |unpack_dir|
+          @command.run!(gpg, args: ["--batch", "--yes", "--output", Pathname(unpack_dir).join(@path.basename(".gpg")), "--decrypt", @path])
+
+          extract_nested_inside(unpack_dir)
+        end
+      end
+    end
+  end
+end

Library/Homebrew/test/cask/installer_spec.rb

@@ -161,6 +161,19 @@ describe Hbc::Installer, :cask do
       expect(Hbc.appdir.join("container-lzma--#{asset.version}")).to be_a_file
     end
 
+    it "works with gpg-based Casks" do
+      skip("gpg not installed") if which("gpg").nil?
+      asset = Hbc::CaskLoader.load_from_file(TEST_FIXTURE_DIR/"cask/Casks/container-gpg.rb")
+
+      allow(asset).to receive(:depends_on).and_return(empty_depends_on_stub)
+      shutup do
+        Hbc::Installer.new(asset).install
+      end
+
+      expect(Hbc.caskroom.join("container-gpg", asset.version)).to be_a_directory
+      expect(Hbc.appdir.join("container")).to be_a_file
+    end
+
     it "blows up on a bad checksum" do
       bad_checksum = Hbc::CaskLoader.load_from_file(TEST_FIXTURE_DIR/"cask/Casks/bad-checksum.rb")
       expect {

Library/Homebrew/test/support/fixtures/cask/Casks/container-gpg.rb

@@ -0,0 +1,12 @@
+cask 'container-gpg' do
+  version '1.2.3'
+  sha256 :no_check
+
+  url "file://#{TEST_FIXTURE_DIR}/cask/container.tar.xz.gpg"
+  gpg :embedded, key_id: 'B0976E51E5C047AD0FD051294E402EBF7C3C6A71'
+
+  homepage 'https://example.com/container-gpg'
+  depends_on formula: 'gpg'
+
+  app 'container'
+end