bash completion: Add a simple test that the 'complete' command is not missing.

bash/Makefile.am

@@ -54,7 +54,8 @@ symlinks = \
 # Note: Don't distribute the symbolic links, only the real files.
 EXTRA_DIST = \
 	README \
-	$(scripts)
+	$(scripts) \
+	$(TESTS)
 
 CLEANFILES = \
 	$(symlinks)
@@ -96,3 +97,13 @@ clean-local:
 	-test $(srcdir) != $(builddir) && rm -f $(scripts)
 
 endif
+
+# Tests.
+TESTS_ENVIRONMENT = \
+	scripts="$(scripts)" \
+	symlinks="$(scripts)" \
+	commands="$(scripts) $(symlinks)" \
+	$(top_builddir)/run --test
+
+TESTS = \
+	test-complete-in-script.sh

bash/test-complete-in-script.sh

@@ -0,0 +1,45 @@
+#!/bin/bash -
+# libguestfs bash completion test script
+# Copyright (C) 2016 Red Hat 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 of the License, 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, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+# Test that the correct 'complete' command is included in the script.
+# Mainly prevents symlinking errors and some omissions.
+
+unset CDPATH
+export LANG=C
+
+if [ -n "$SKIP_TEST_COMPLETE_IN_SCRIPT_SH" ]; then
+    echo "$0: test skipped because environment variable is set"
+    exit 77
+fi
+
+if [ -z "$commands" ]; then
+    echo "$0: \$commands is not defined.  Use 'make check' to run this test."
+    exit 1
+fi
+
+for cmd in $commands; do
+    if [ ! -f $cmd ]; then
+        echo "$0: script or symlink '$cmd' is missing"
+        exit 1
+    fi
+    if ! grep "^complete.*$cmd\$" $cmd; then
+        echo "$0: script or symlink '$cmd' does not have"
+        echo "a 'complete' rule for '$cmd'"
+        exit 1
+    fi
+done