Make examples workable with 2.0 API.

examples/keylist.rb

@@ -1,6 +1,7 @@
 #!/usr/bin/env ruby
 require 'gpgme'
 
-GPGME.list_keys(ARGV.shift) do |key|
+ctx = GPGME::Ctx.new
+ctx.each_key(ARGV.shift) do |key|
   puts(key)
 end

examples/roundtrip.rb

@@ -28,12 +28,15 @@ plain = 'test test test'
 puts("Plaintext:\n#{plain}")
 
 # Perform symmetric encryption on PLAIN.
-cipher = GPGME::encrypt(nil, plain, {:armor => true,
+crypto = GPGME::Crypto.new(:armor => true)
+cipher = crypto.encrypt(plain, {:symmetric => true,
 			  # :passphrase_callback => method(:passfunc)
 			})
-puts("Ciphertext:\n#{cipher}")
+str = cipher.read
+puts("Ciphertext:\n#{str}")
 
-plain = GPGME::decrypt(cipher, {
+cipher = GPGME::Data.new(str)
+plain = crypto.decrypt(cipher, {
 			 # :passphrase_callback => method(:passfunc)
 		       })
-puts("Plaintext:\n#{plain}")
+puts("Plaintext:\n#{plain.read}")

examples/sign.rb

@@ -24,6 +24,8 @@ unless ENV['GPG_AGENT_INFO']
   exit(1)
 end
 
-puts GPGME::clearsign('test test test', {
-                   # :passphrase_callback => method(:passfunc)
-                 })
+crypto = GPGME::Crypto.new
+signature = crypto.clearsign('test test test', {
+                               # :passphrase_callback => method(:passfunc)
+                             })
+puts signature.read

examples/verify.rb

@@ -1,6 +1,8 @@
 #!/usr/bin/env ruby
 require 'gpgme'
 
-GPGME::verify(ARGF.read, nil, $stdout) do |signature|
-  puts(signature.to_s)
+crypto = GPGME::Crypto.new
+signature = GPGME::Data.new(ARGF.read)
+crypto.verify(signature) do |sig|
+  puts(sig.to_s)
 end