# vim:ft=automake
#
# Adjust post-install permissions settings.  This rule works off two
# specially-formatted variables, INSTALLPERMS_exec and INSTALLPERMS_data. 
# Each is a whitespace-separated list of commands, all of which are either
# a variable assignment or a filename.  Three variables are available:
#
#  - dest= sets the destination directory to e.g., $(sbindir)
#  - chown= controls changes in ownership; value is first argument to chown
#  - chmod= controls changes in permissions; value is first argument to chmod
#
# As a special case, chown=amanda is taken as equivalent to 
# chown=$(BINARY_OWNER):$(SETUID_GROUP), which may otherwise have problems with
# whitespace in the user/group names.
# 
# when a filename is seen, the currently active variables are applied.
#
# Note that scripts are data, not executables!
#
# EXAMPLE
#
# sbin_PROGRAMS = foo bar bing
# libexec_PROGRAMS = pro gram
# sbin_SCRIPTS = sk ript
# INSTALLPERMS_exec = \
# 	dest=$(sbindir) chown=amanda chmod= \
# 		foo bar \
# 	chmod=u+s,o-rwx \
# 		bing
# 	dest=$(libexecdir) chmod= \
# 		$(libexec_PROGRAMS)
# INSTALLPERMS_data = \
# 	dest=$(sbindir) chown=amanda chmod= \
# 		$(sbin_SCRIPTS)
#
# This whole operation is not required when making builds for packaging,
# and can be disabled with --disable-installperms, via the WANT_INSTALLPERMS
# AM_CONDITIONAL.

# sed expression to strip leading directories from a filename; this converts e.g.,
# src/foo/bar.so to bar.so.
strip_leading_dirs=s|^.*/||

if WANT_INSTALLPERMS
installperms-exec:
	@installperms="$(INSTALLPERMS_exec)"; \
	test -n "$$installperms" && echo "Setting installation permissions on executables"; \
	dest=; chown=; chmod=; \
	for cmd in $$installperms; do \
	    case "$$cmd" in \
		chown=amanda) \
			echo "  ($$cmd)"; chown="$(BINARY_OWNER):$(SETUID_GROUP)";; \
		dest=*|chown=*|chmod=*) \
			echo "  ($$cmd)"; eval $$cmd;; \
		*)  pa="$(DESTDIR)$$dest"/`echo "$$cmd"|sed '$(strip_leading_dirs)'|sed '$(transform)'`; \
		    if test -n "$$chown"; then \
			echo chown "$$chown" "$$pa"; \
			chown "$$chown" "$$pa" || exit 1; \
		    fi; \
		    if test -n "$$chmod"; then \
			echo chmod "$$chmod" "$$pa"; \
			chmod "$$chmod" "$$pa" || exit 1; \
		    fi; \
	    esac; \
	done

installperms-data:
	@installperms="$(INSTALLPERMS_data)"; \
	test -n "$$installperms" && echo "Setting installation permissions on data"; \
	dest=; chown=; chmod=; \
	for cmd in $$installperms; do \
	    case "$$cmd" in \
		chown=amanda) \
			echo "  ($$cmd)"; chown="$(BINARY_OWNER):$(SETUID_GROUP)";; \
		dest=*|chown=*|chmod=*) \
			echo "  ($$cmd)"; eval $$cmd;; \
		*)  pa="$(DESTDIR)$$dest"/`echo "$$cmd"|sed '$(strip_leading_dirs)'|sed '$(transform)'`; \
		    if test -n "$$chown"; then \
			echo chown "$$chown" "$$pa"; \
			chown "$$chown" "$$pa" || exit 1; \
		    fi; \
		    if test -n "$$chmod"; then \
			echo chmod "$$chmod" "$$pa"; \
			chmod "$$chmod" "$$pa" || exit 1; \
		    fi; \
	    esac; \
	done

install-exec-hook: installperms-exec
install-data-hook: installperms-data
endif