scripts/installer: avoid SCM-tracking a symlink to NUT source root

Signed-off-by: Jim Klimov <jimklimov+nut@gmail.com>

Author: jimklimov

scripts/installer/Makefile.am

@@ -32,6 +32,10 @@ EXTRA_DIST = \
 
 SPELLCHECK_SRC = README.adoc common/README_ipp-os-shutdown.adoc
 
+nut:
+	rm -f "$@"
+	$(LN_S) $(top_srcdir) "$@"
+
 # NOTE: Due to portability, we do not use a GNU percent-wildcard extension.
 # We also have to export some variables that may be tainted by relative
 # paths when parsing the other makefile (e.g. MKDIR_P that may be defined
@@ -54,4 +58,8 @@ spellcheck spellcheck-interactive spellcheck-sortdict:
 
 CLEANFILES = *-spellchecked
 
+# Remove "nut" if it is a symlink to the source tree
+clean-local:
+	if test -L nut || test -h nut ; then rm -f nut ; fi
+
 MAINTAINERCLEANFILES = Makefile.in .dirstamp

scripts/installer/README.adoc

@@ -8,13 +8,13 @@ of Eaton by Frederic Bohe, Vaclav Krpec, Arnaud Quette and Jim Klimov.
 
 This includes the package (tarball) creation script which relies on
 presence of third-party library binaries in a `$ARCH/libs` directory,
-and init-scripts from NUT source tree (originally expected as a "nut"
-subdirectory), as well as an interactive installer script to set up
-the package on a target deployment covering package (re-)installation,
-initial device discovery, password setup, etc., and helper scripts
-for status overview and shutdown handling.
+and init-scripts from NUT source tree (originally expected as a `nut`
+subdirectory, can be a symlink to `../..`), as well as an interactive
+installer script to set up the package on a target deployment covering
+package (re-)installation, initial device discovery, password setup,
+etc., and helper scripts for status overview and shutdown handling.
 
-The installer relies on "nutconf" tool (emulating dummy script for
+The installer relies on `nutconf` tool (emulating dummy script for
 tests provided here), which is part of NUT sources.
 
 Note that heavy use of `LD_LIBRARY_PATH` in these scripts may become