tools: Make symlinks to vsh bash-completion script

The bash-completion project documents that only those scripts
from $BASH_COMPLETIONS_DIR that share name with the current
command for which <TAB> was hit are loaded [1]. This means, that
vsh script we have there is not loaded. We have to create
symlinks for virsh and virt-admin.

At the same time, we have to create new RPM package because
virt-admin and client packages are independent. That means we
cannot place the vsh script in either of them. What we can do is
to have a different package that contains the completion script
and then virt-admin and client packages contain only the symlink
and require the bash-completion package.

1: https://github.com/scop/bash-completion#faqSigned-off-by: NMichal Privoznik <mprivozn@redhat.com>

libvirt.spec.in

@@ -1017,6 +1017,9 @@ Requires: gnutls-utils
 # Needed for probing the power management features of the host.
 Requires: pm-utils
 %endif
+%if %{with_bash_completion}
+Requires: %{name}-bash-completion = %{version}-%{release}
+%endif
 
 %description client
 The client binaries needed to access the virtualization
@@ -1041,10 +1044,22 @@ Summary: Set of tools to control libvirt daemon
 Group: Development/Libraries
 Requires: %{name}-libs = %{version}-%{release}
 Requires: readline
+%if %{with_bash_completion}
+Requires: %{name}-bash-completion = %{version}-%{release}
+%endif
 
 %description admin
 The client side utilities to control the libvirt daemon.
 
+%if %{with_bash_completion}
+%package bash-completion
+Summary: Bash completion script
+Group: Development/Libraries
+
+%description bash-completion
+Bash completion script stub.
+%endif
+
 %if %{with_wireshark}
 %package wireshark
 Summary: Wireshark dissector plugin for libvirt RPC transactions
@@ -2059,7 +2074,7 @@ exit 0
 %{_datadir}/systemtap/tapset/libvirt_functions.stp
 
 %if %{with_bash_completion}
-%{_datadir}/bash-completion/completions/vsh
+%{_datadir}/bash-completion/completions/virsh
 %endif
 
 
@@ -2111,7 +2126,14 @@ exit 0
 %files admin
 %{_mandir}/man1/virt-admin.1*
 %{_bindir}/virt-admin
+%if %{with_bash_completion}
+%{_datadir}/bash-completion/completions/virt-admin
+%endif
 
+%if %{with_bash_completion}
+%files bash-completion
+%{_datadir}/bash-completion/completions/vsh
+%endif
 
 %if %{with_wireshark}
 %files wireshark

tools/Makefile.am

@@ -424,9 +424,14 @@ install-bash-completion:
 	$(MKDIR_P) "$(DESTDIR)$(BASH_COMPLETIONS_DIR)"
 	$(INSTALL_SCRIPT) $(srcdir)/bash-completion/vsh \
 		"$(DESTDIR)$(BASH_COMPLETIONS_DIR)/vsh"
+	( cd $(DESTDIR)$(BASH_COMPLETIONS_DIR) && \
+		$(LN_S) vsh virsh && \
+		$(LN_S) vsh virt-admin )
 
 uninstall-bash-completion:
-	rm -f $(DESTDIR)$(BASH_COMPLETIONS_DIR)/vsh
+	rm -f $(DESTDIR)$(BASH_COMPLETIONS_DIR)/vsh \
+		$(DESTDIR)$(BASH_COMPLETIONS_DIR)/virsh \
+		$(DESTDIR)$(BASH_COMPLETIONS_DIR)/virt-admin
 	rmdir $(DESTDIR)$(BASH_COMPLETIONS_DIR) ||:
 else ! WITH_BASH_COMPLETION
 install-bash-completion: