Massive speedup in the package/target scanning step

- per package metadata files are now cached.
- timestamp.pl calls have been replaced with make file dependencies
- an extra stamp file ensures that directory listing changes force a rebuild


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@6404 3c298f89-4303-0410-b956-a3cf2f4a3e73

1 files changed, 43 insertions, 0 deletions

diff --git a/include/scan.mk b/include/scan.mk
new file mode 100644
index 000000000..7725fc713
--- /dev/null
+++ b/include/scan.mk
@@ -0,0 +1,43 @@
+include $(TOPDIR)/include/verbose.mk
+
+SCAN_TARGET ?= pkginfo
+SCAN_NAME ?= package
+SCAN_DIR ?= package
+SCAN_DEPS ?= include/package.mk
+
+ifeq ($(IS_TTY),1)
+  define progress
+	printf "\033[M\r$(1)" >&2;
+  endef
+else
+  define progress
+	:
+  endef
+endif
+
+SCAN = $(patsubst $(SCAN_DIR)/%/Makefile,%,$(shell ls $(SCAN_DIR)/*/Makefile))
+tmp/.$(SCAN_TARGET):
+	@($(call progress,Collecting $(SCAN_NAME) info: merging...))
+	for file in $(SCAN); do \
+		cat tmp/info/.$(SCAN_TARGET)-$$file; \
+	done > $@
+	@($(call progress,Collecting $(SCAN_NAME) info: done))
+	@echo
+
+define scanfiles
+$(foreach FILE,$(SCAN),
+  tmp/.$(SCAN_TARGET): tmp/info/.$(SCAN_TARGET)-$(FILE) FORCE
+  tmp/info/.$(SCAN_TARGET)-$(FILE): $(SCAN_DEPS) $(SCAN_DIR)/$(FILE)/Makefile
+	{ \
+		$$(call progress,Collecting $(SCAN_NAME) info: $(SCAN_DIR)/$(FILE)) \
+		echo Source-Makefile: $(SCAN_DIR)/$(FILE)/Makefile; \
+		$(NO_TRACE_MAKE) --no-print-dir DUMP=1 -C $(SCAN_DIR)/$(FILE) 3>/dev/null || echo "ERROR: please fix $(SCAN_DIR)/$(FILE)/Makefile" >&2; \
+		echo; \
+	} > $$@
+)
+
+endef
+$(eval $(call scanfiles))
+
+FORCE:
+.PHONY: FORCE