Exclude VCS directory with writing from an archive

See https://savannah.gnu.org/bugs/?62859

po/.gitignore

@@ -1,3 +1,7 @@
+/remove-potcdate.sin~
+/insert-header.sin~
+/[email protected]~
+/[email protected]~
 /Makefile.in.in
 /Makevars.template
 /Rules-quot

src/names.c

@@ -348,7 +348,7 @@ handle_file_selection_option (int key, const char *arg)
       break;
 
     case EXCLUDE_VCS_OPTION:
-      add_exclude_array (vcs_file_table, 0);
+      add_exclude_array (vcs_file_table, FNM_LEADING_DIR);
       break;
 
     case EXCLUDE_VCS_IGNORES_OPTION:

tests/exclude18.at

@@ -0,0 +1,87 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright 2004-2023 Free Software Foundation, Inc.
+
+# This file is part of GNU tar.
+
+# GNU tar is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+
+# GNU tar is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Test --exclude-vcs option with subcommands: EXTRACT, LIST, DIFF.
+# Check VCS directory with files, and empty.
+#
+# Ref: https://savannah.gnu.org/bugs/?62859
+# Wed 03 Aug 2022 04:06:28 PM UTC, original submission:  Quote
+# Mohamed Akram <mohdakram>
+# > The --exclude-vcs flag seems to exclude .gitignore but not .git when
+# extracting.
+
+AT_SETUP([--exclude-vcs extract list compare])
+AT_KEYWORDS([exclude-vcs extract list compare exclude18])
+
+AT_TAR_CHECK([
+AT_SORT_PREREQ
+mkdir gitrepo
+cd gitrepo
+
+# Make an empty VCS directory:
+mkdir .svn
+
+# Make a VCS directory with a file:
+mkdir .git
+touch .git/_A
+
+# Make a VCS file:
+touch .gitignore
+
+# Make non-VCS files:
+touch .git_B
+touch _C
+
+# Create an archive, include VCS:
+cd ..
+tar -cf gitrepo.tar gitrepo
+rm -r gitrepo
+
+echo Extract:
+tar -xvf gitrepo.tar --exclude-vcs | sort
+
+echo
+echo List:
+tar -tf gitrepo.tar --exclude-vcs | sort
+
+echo
+echo Diff:
+tar -dvf gitrepo.tar --exclude-vcs gitrepo | sort
+
+],
+[0],
+[Extract:
+gitrepo/
+gitrepo/.git_B
+gitrepo/_C
+
+List:
+gitrepo/
+gitrepo/.git_B
+gitrepo/_C
+
+Diff:
+gitrepo/
+gitrepo/.git_B
+gitrepo/_C
+],
+[])
+
+AT_CLEANUP

tests/testsuite.at

@@ -313,6 +313,7 @@ m4_include([exclude14.at])
 m4_include([exclude15.at])
 m4_include([exclude16.at])
 m4_include([exclude17.at])
+m4_include([exclude18.at])
 
 AT_BANNER([Deletions])
 m4_include([delete01.at])