#
# define a dependency on a subtree
# parameters:
-# 1: directory
+# 1: directories/files
# 2: directory dependency
# 3: tempfile for file listings
# 4: find options
-FINDPARAMS := -type f -not -name ".*" -and -not -path "*.svn*"
+DEP_FINDPARAMS := -x "*/.svn*" -x ".*" -x "*:*" -x "*\!*" -x "* *" -x "*\\\#*" -x "*/.*_check"
+
+find_md5=$(SH_FUNC) find $(1) -type f $(patsubst -x,-and -not -path,$(DEP_FINDPARAMS) $(2)) | md5s
+
define rdep
- $(foreach file,$(shell find $(1) $(FINDPARAMS) -and -not -path "*:*" $(4)),
- $(2): $(file)
- $(file): ;
- )
+ .PRECIOUS: $(2)
+ .SILENT: $(2)_check
- ifneq ($(shell find $(1) $(FINDPARAMS) $(4) 2>/dev/null | md5s),$(shell cat $(3) 2>/dev/null))
- $(2): $(3)
- endif
-
- $(3): FORCE
- @-find $(1) $(FINDPARAMS) $(4) 2>/dev/null | md5s > $$@
+ $(2): $(2)_check
+ $(2)_check::
+ if [ -f "$(2)" ]; then \
+ $(if $(3), \
+ $(call find_md5,$(1),$(4)) > $(3).1; \
+ { [ \! -f "$(3)" ] || diff $(3) $(3).1 >/dev/null; } && \
+ ) \
+ { \
+ [ -f "$(2)_check.1" ] && mv "$(2)_check.1"; \
+ $(TOPDIR)/scripts/timestamp.pl $(DEP_FINDPARAMS) $(4) -n $(2) $(1) && { \
+ $(call debug_eval,$(SUBDIR),r,echo "No need to rebuild $(2)";) \
+ touch -r "$(2)" "$(2)_check"; \
+ } \
+ } || { \
+ $(call debug_eval,$(SUBDIR),r,echo "Need to rebuild $(2)";) \
+ touch "$(2)_check"; \
+ }; \
+ $(if $(3), mv $(3).1 $(3);) \
+ else \
+ $(if $(3), rm -f $(3) $(3).1;) \
+ $(call debug_eval,$(SUBDIR),r,echo "Target $(2) not built";) \
+ true; \
+ fi
endef
+