gpgtar: Use log-file from common.conf only in --batch mode.

* tools/gpgtar.c (main): Do it.
--

This makes the interactive use of gpgtar more convenient and is more
aligned to what gpg and gpgsm do.

Author: dd9jn

doc/tools.texi

@@ -2060,7 +2060,8 @@ implemented.
 @item --batch
 @opindex batch
 Use batch mode.  Never ask but use the default action.  This option is
-passed directly to @command{gpg}.
+passed directly to @command{gpg}.  This option is also required to
+activate the @option{log-file} in @file{common.conf} for this program.
 
 @item --yes
 @opindex yes

tools/gpgtar.c

@@ -496,8 +496,11 @@ main (int argc, char **argv)
   if (log_get_errorcount (0))
     exit (2);
 
-  /* Get a log file from common.conf.  */
-  if (!parse_comopt (GNUPG_MODULE_NAME_GPGTAR, any_debug) && comopt.logfile)
+  /* Get a log file from common.conf but use it only in --batch mode
+   * because people expect to see the verbose output here even if they
+   * have a log-file in their common.conf.  */
+  if (!parse_comopt (GNUPG_MODULE_NAME_GPGTAR, any_debug) && comopt.logfile
+      && opt.batch)
     log_set_file (comopt.logfile);
 
   /* Print a warning if an argument looks like an option.  */