# creates or applies a permissions script that can be used to set file
# permissions in situations where they are lost (like svn)

.SILENT:

permissions_applied=permissions_applied~

ifndef PERMISSIONS_SCRIPT
PERMISSIONS_SCRIPT=file_permissions.sh
endif

ifndef PERMISSIONS_ROOT
ifdef INSTALL_FROM
PERMISSIONS_ROOT=$(INSTALL_FROM)
else
PERMISSIONS_ROOT=.
endif
endif

_create_permissions_script:
	# create permissions_script
	echo "cd \$$(dirname \$$0)" > $(PERMISSIONS_SCRIPT)
	find $(PERMISSIONS_ROOT) -name '*' -exec stat -c 'chmod %a %n' {} \; | \
		grep -v ".svn" | grep -v "~$$" >> $(PERMISSIONS_SCRIPT)
	sort $(PERMISSIONS_SCRIPT) -o $(PERMISSIONS_SCRIPT)
	echo "exit 0" >> $(PERMISSIONS_SCRIPT)
	touch $(PERMISSIONS_SCRIPT)
	
all: $(permissions_applied)
	# initial permissions have been applied so just remake the permissions script
	$(MAKE) _create_permissions_script

$(permissions_applied): $(PERMISSIONS_SCRIPT)
	# there is a permissions script but it has not yet been applied
	# this project must have just been checked out from svn or a new project
	# in both cases we simply just need to execute the script and set the tag
	bash $(permissions_script)
	touch $(permissions_applied) 
	
$(PERMISSIONS_SCRIPT):
	# there is no permissions script so this must be a new project
	# lets create a permissions script
	$(MAKE) _create_permissions_script

clean:
	rm -f $(PERMISSIONS_SCRIPT) $(permissions_applied)
	
.PHONY: clean all _create_permissions_script