core: Support usage of gpgtar for creating a signed archive

* src/gpgme.h.in (GPGME_SIG_MODE_ARCHIVE): New signature mode.
* src/engine-gpg.c (append_args_from_sender,
append_args_from_sig_notations): Use add_gpg_arg_with_value
for gpg-only options with a value.
(gpg_sign): Set use_gpgtar engine flag if GPGME_SIG_MODE_ARCHIVE mode
is set. Check for new enough gpg. Use add_gpg_arg_with_value for
gpg-only options with a value and add_gpg_arg for gpg-only options
without a value. Set extra options for gpgtar and pass input data to
stdin when using gpgtar.
* src/sign.c (sign_start): Add GPGME_SIG_MODE_ARCHIVE as valid mode.

* tests/run-sign.c (show_usage): New options --archive and
--diagnostics.
(main): Parse new options. Sign with gpgtar if --archive is given.
Print stderr of gpg/gpgtar if --diagnostics is given.
--

With this change the gpgme_op_sign* functions get support for
creating a signed archive from files and/or directories passed as
NUL-separated list in the "in" data with gpgtar.

GnuPG-bug-id: 6342

1 files changed, 2 insertions, 1 deletions

diff --git a/src/gpgme.h.in b/src/gpgme.h.in
index db1f8f13..fabba257 100644
--- a/src/gpgme.h.in
+++ b/src/gpgme.h.in
@@ -308,7 +308,8 @@ typedef enum
   {
     GPGME_SIG_MODE_NORMAL = 0,
     GPGME_SIG_MODE_DETACH = 1,
-    GPGME_SIG_MODE_CLEAR  = 2
+    GPGME_SIG_MODE_CLEAR  = 2,
+    GPGME_SIG_MODE_ARCHIVE = 3
   }
 gpgme_sig_mode_t;