Merge branch 'ch/new-gpg-drops-rfc-1991'

Recent GPG changes the keyring format and drops support for RFC1991
formatted signatures, breaking our existing tests.

* ch/new-gpg-drops-rfc-1991:
  tests: make comment on GPG keyring match the code
  tests: squelch noise from GPG machinery set-up
  tests: replace binary GPG keyrings with ASCII-armored keys
  tests: skip RFC1991 tests for gnupg 2.1
  tests: create gpg homedir on the fly

t/lib-gpg.sh

@@ -12,20 +12,39 @@ else
 		say "Your version of gpg (1.0.6) is too buggy for testing"
 		;;
 	*)
-		# key generation info: gpg --homedir t/lib-gpg --gen-key
-		# Type DSA and Elgamal, size 2048 bits, no expiration date.
-		# Name and email: C O Mitter <committer@example.com>
+		# Available key info:
+		# * Type DSA and Elgamal, size 2048 bits, no expiration date,
+		#   name and email: C O Mitter <committer@example.com>
+		# * Type RSA, size 2048 bits, no expiration date,
+		#   name and email: Eris Discordia <discord@example.net>
 		# No password given, to enable non-interactive operation.
-		cp -R "$TEST_DIRECTORY"/lib-gpg ./gpghome
-		chmod 0700 gpghome
-		chmod 0600 gpghome/*
-		GNUPGHOME="$(pwd)/gpghome"
-		export GNUPGHOME
+		# To generate new key:
+		#	gpg --homedir /tmp/gpghome --gen-key
+		# To write armored exported key to keyring:
+		#	gpg --homedir /tmp/gpghome --export-secret-keys \
+		#		--armor 0xDEADBEEF >> lib-gpg/keyring.gpg
+		# To export ownertrust:
+		#	gpg --homedir /tmp/gpghome --export-ownertrust \
+		#		> lib-gpg/ownertrust
+		mkdir ./gpghome &&
+		chmod 0700 ./gpghome &&
+		GNUPGHOME="$(pwd)/gpghome" &&
+		export GNUPGHOME &&
+		gpg --homedir "${GNUPGHOME}" 2>/dev/null --import \
+			"$TEST_DIRECTORY"/lib-gpg/keyring.gpg &&
+		gpg --homedir "${GNUPGHOME}" 2>/dev/null --import-ownertrust \
+			"$TEST_DIRECTORY"/lib-gpg/ownertrust &&
 		test_set_prereq GPG
 		;;
 	esac
 fi
 
+if test_have_prereq GPG &&
+    echo | gpg --homedir "${GNUPGHOME}" -b --rfc1991 >/dev/null 2>&1
+then
+	test_set_prereq RFC1991
+fi
+
 sanitize_pgp() {
 	perl -ne '
 		/^-----END PGP/ and $in_pgp = 0;

t/lib-gpg/keyring.gpg

@@ -0,0 +1,88 @@
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+Version: GnuPG v1
+
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+Cezx4Q2khACcCs+/LtE8Lb9hC+2cvr3uH5p82AI=
+=aEiU
+-----END PGP PRIVATE KEY BLOCK-----
+-----BEGIN PGP PRIVATE KEY BLOCK-----
+Version: GnuPG v1
+
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+=hieJ
+-----END PGP PRIVATE KEY BLOCK-----

t/lib-gpg/ownertrust

@@ -0,0 +1,4 @@
+# List of assigned trustvalues, created Thu 11 Dec 2014 01:26:28 PM CET
+# (Use "gpg --import-ownertrust" to restore them)
+73D758744BE721698EC54E8713B6F51ECDDE430D:6:
+D4BE22311AD3131E5EDA29A461092E85B7227189:3:

t/t7004-tag.sh

@@ -1081,7 +1081,7 @@ test_expect_success GPG \
 get_tag_header rfc1991-signed-tag $commit commit $time >expect
 echo "RFC1991 signed tag" >>expect
 echo '-----BEGIN PGP MESSAGE-----' >>expect
-test_expect_success GPG \
+test_expect_success GPG,RFC1991 \
 	'creating a signed tag with rfc1991' '
 	echo "rfc1991" >gpghome/gpg.conf &&
 	git tag -s -m "RFC1991 signed tag" rfc1991-signed-tag $commit &&
@@ -1095,7 +1095,7 @@ cp "$1" actual
 EOF
 chmod +x fakeeditor
 
-test_expect_success GPG \
+test_expect_success GPG,RFC1991 \
 	'reediting a signed tag body omits signature' '
 	echo "rfc1991" >gpghome/gpg.conf &&
 	echo "RFC1991 signed tag" >expect &&
@@ -1103,13 +1103,13 @@ test_expect_success GPG \
 	test_cmp expect actual
 '
 
-test_expect_success GPG \
+test_expect_success GPG,RFC1991 \
 	'verifying rfc1991 signature' '
 	echo "rfc1991" >gpghome/gpg.conf &&
 	git tag -v rfc1991-signed-tag
 '
 
-test_expect_success GPG \
+test_expect_success GPG,RFC1991 \
 	'list tag with rfc1991 signature' '
 	echo "rfc1991" >gpghome/gpg.conf &&
 	echo "rfc1991-signed-tag RFC1991 signed tag" >expect &&
@@ -1123,12 +1123,12 @@ test_expect_success GPG \
 
 rm -f gpghome/gpg.conf
 
-test_expect_success GPG \
+test_expect_success GPG,RFC1991 \
 	'verifying rfc1991 signature without --rfc1991' '
 	git tag -v rfc1991-signed-tag
 '
 
-test_expect_success GPG \
+test_expect_success GPG,RFC1991 \
 	'list tag with rfc1991 signature without --rfc1991' '
 	echo "rfc1991-signed-tag RFC1991 signed tag" >expect &&
 	git tag -l -n1 rfc1991-signed-tag >actual &&
@@ -1139,7 +1139,7 @@ test_expect_success GPG \
 	test_cmp expect actual
 '
 
-test_expect_success GPG \
+test_expect_success GPG,RFC1991 \
 	'reediting a signed tag body omits signature' '
 	echo "RFC1991 signed tag" >expect &&
 	GIT_EDITOR=./fakeeditor git tag -f -s rfc1991-signed-tag $commit &&