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-rw-r--r--t/ctags.sh111
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diff --git a/t/ctags.sh b/t/ctags.sh
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+++ b/t/ctags.sh
@@ -0,0 +1,111 @@
+#! /bin/sh
+# Copyright (C) 2012-2014 Free Software Foundation, Inc.
+#
+# This program 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 2, or (at your option)
+# any later version.
+#
+# This program 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 vi-style tags.
+
+required=${CTAGS:=ctags}
+. test-init.sh
+
+cat >> configure.ac << 'END'
+AC_SUBST([CC], [false])
+AM_CONDITIONAL([COND_FALSE], [false])
+AC_CONFIG_FILES([sub1/Makefile
+ sub3/Makefile
+ sub2/Makefile
+ sub2/subsub/Makefile])
+AC_OUTPUT
+END
+
+mkdir sub1 sub2 sub3 sub2/subsub
+
+cat > Makefile.am << 'END'
+SUBDIRS = sub1 sub2 sub3
+test-ctags: ctags
+ test ! -f tags
+ cat sub1/tags
+ cat sub2/tags
+ cat sub2/subsub/tags
+ test ! -f sub3/tags
+ grep 'iguana\.c' sub1/tags
+ grep 'zap_zap' sub1/tags
+ grep 'main' sub1/tags
+ grep 'choke_me' sub1/tags && exit 1; :
+ grep 'subsub/foo\.h' sub2/tags
+ grep 'IsBigger' sub2/tags
+ grep 'bar\.f77' sub2/subsub/tags
+ grep 'foo\.cxx' sub2/subsub/tags
+ grep 'foo\.h' sub2/subsub/tags && exit 1; :
+check-local: test-ctags
+END
+
+cat > sub1/Makefile.am << 'END'
+if COND_FALSE
+bin_PROGRAMS = iguana
+endif
+END
+
+cat > sub1/iguana.c <<'END'
+int main (void) { return zap_zap (0); }
+
+int
+zap_zap (int x)
+{
+ return x + choke_me ();
+}
+END
+
+cat > sub2/Makefile.am << 'END'
+SUBDIRS = subsub .
+noinst_HEADERS = subsub/foo.h
+subsub/foo.h:
+ # Use and inlined function, not a #define, for the sake of
+ # Emacs and XEmacs ctags (at least up to version 23).
+ echo 'inline int IsBigger (int a, int b) { return (a > b); }' >$@
+CLEANFILES = $(noinst_HEADERS)
+END
+
+cat > sub2/subsub/Makefile.am << 'END'
+TAGS_FILES =
+EXTRA_DIST = bar.f77
+TAGS_FILES += bar.f77
+nodist_noinst_DATA = foo.cxx
+TAGS_FILES += foo.cxx
+CLEANFILES = foo.cxx
+foo.cxx:
+ echo "int cxx_func (void) { return 0; }" >$@
+END
+
+cat > sub2/subsub/bar.f77 << 'END'
+ subroutine foobarbaz
+ return
+ end
+END
+
+# No files to tag here, deliberately.
+: > sub3/Makefile.am
+
+$ACLOCAL
+$AUTOCONF
+$AUTOMAKE -i
+
+./configure
+$MAKE test-ctags CTAGS="$CTAGS"
+$MAKE distcheck CTAGS="$CTAGS"
+
+$MAKE distclean
+find . -name tags | grep . && exit 1
+
+: