gpg: tweaks

Library/Homebrew/gpg.rb

@@ -7,8 +7,7 @@ def self.find_gpg(executable)
       next unless gpg_short_version
       gpg_version = Version.create(gpg_short_version.to_s)
       @version = gpg_version
-      gpg_version == Version.create("2.1") ||
-        gpg_version == Version.create("2.0")
+      gpg_version >= Version.create("2.0")
     end
   end
 
@@ -38,12 +37,30 @@ def self.create_test_key(path)
       Key-Length: 2048
       Subkey-Type: RSA
       Subkey-Length: 2048
-      Passphrase: ''
       Name-Real: Testing
       Name-Email: testing@foo.bar
       Expire-Date: 1d
+      %no-protection
       %commit
     EOS
     system GPG_EXECUTABLE, "--batch", "--gen-key", "batch.gpg"
   end
+
+  def self.cleanup_test_processes!
+    odie "No GPG present to test against!" unless available?
+    gpgconf = Pathname.new(GPG_EXECUTABLE).parent/"gpgconf"
+
+    system gpgconf, "--kill", "gpg-agent"
+    system gpgconf, "--homedir", "keyrings/live", "--kill",
+                                 "gpg-agent"
+  end
+
+  def self.test(path)
+    create_test_key(path)
+    begin
+      yield
+    ensure
+      cleanup_test_processes!
+    end
+  end
 end

Library/Homebrew/requirements/gpg2_requirement.rb

@@ -5,8 +5,8 @@ class GPG2Requirement < Requirement
   fatal true
   default_formula "gnupg"
 
-  # GPGTools installs GnuPG 2.0.x as a vanilla `gpg` symlink
-  # pointing to `gpg2`. Homebrew install 2.1.x as a non-symlink `gpg`.
-  # We support both the 2.0.x "stable" and 2.1.x "modern" series here.
+  # GPGTools installs GnuPG 2.0.x as a `gpg` symlink pointing
+  # to `gpg2`. Our `gnupg` installs only a non-symlink `gpg`.
+  # The aim is to retain support for any version above 2.0.
   satisfy(build_env: false) { Gpg.gpg || Gpg.gpg2 }
 end