toplevel build report now timestamped

Thanks torabora@ for yet again seemingly obvious feature request
which strangely managed to evade implementation before.

On an afterthought, mass builds would suggest too much coffee
instead of a progress indicator -- so implemented the latter.

NB: the actual downstream-make-calling rule would expand the "naive"
$(shell date) too early: the rule is evaluated before starting its
execution, and as it's the time consuming one the shell evaluation
was in need, not make's.  The result is less generally available
(needs to be double quoted and won't work inside e.g. awk programs)
but way more precise.

Makefile

@@ -42,10 +42,15 @@ help:
 
 ### suboptimal but at least clear, reliable and convenient
 all:
-	@for i in $(DISTROS); do \
-		echo "** building $$i:"; \
-		$(MAKE) --no-print-directory BUILDDIR=$(BUILDDIR) $$i; \
+	@n=1; sum=$(words $(DISTROS)); \
+	for distro in $(DISTROS); do \
+		echo "** building $$distro:"; \
+		$(MAKE) --no-print-directory \
+			ALL=$$n/$$sum \
+			BUILDDIR=$(BUILDDIR) \
+			$$distro; \
 		echo; \
+		n=$$(($$n+1)); \
 	done
 
 $(IMAGES): debug \

lib/build.mk

@@ -14,24 +14,28 @@ IMAGEDIR ?= $(shell [ -d "$$HOME/out" -a -w "$$HOME/out" ] \
 	|| echo "$(BUILDDIR)/out" )
 
 build: profile/populate
-	@echo -n "** starting image build"
+	@echo -n "$(TIME) starting image build"
 	@if [ -n "$(DEBUG)" ]; then \
 		echo ": tail -f $(BUILDLOG)" $(SHORTEN); \
 	else \
-		echo " (coffee time)"; \
+		if [ -n "$(ALL)" ]; then \
+			echo " [$(ALL)]"; \
+		else \
+			echo " (coffee time)"; \
+		fi; \
 	fi
 	@if time -f "%E %PCPU %Mk" $(ARCH) \
 		$(MAKE) -C $(BUILDDIR)/ $(LOG); \
 	then \
-		echo "** build done (`tail -1 $(BUILDLOG) | cut -f1 -d. \
+		echo "$(TIME) build done (`tail -1 $(BUILDLOG) | cut -f1 -d. \
 			|| echo "no log"`)"; \
 	else \
-		echo "** build failed, see log: $(BUILDLOG)" $(SHORTEN); \
+		echo "$(TIME) build failed, see log: $(BUILDLOG)" $(SHORTEN); \
 		if [ -z "$(DEBUG)" ]; then \
-			echo "   (you might want to re-run with DEBUG=1)"; \
+			echo "$(TIME) (you might want to re-run with DEBUG=1)"; \
 		fi; \
 		tail -100 "$(BUILDLOG)" | egrep "^E:|[Ee]rror|[Ww]arning"; \
 		df -P $(BUILDDIR) | awk 'END { if ($$4 < 1024) \
-			{ print "** NB: low space on "$$6" ("$$5" used)"}}'; \
+			{ print "NB: low space on "$$6" ("$$5" used)"}}'; \
 	fi
 	@if [ -n "$(BELL)" ]; then echo -ne '\a' >&2; fi

lib/clean.mk

@@ -8,16 +8,17 @@
 ifdef CLEAN
 export GLOBAL_CLEAN_WORKDIR = clean-current
 ifdef DEBUG
-WARNING = (both CLEAN and DEBUG defined, debug options will be limited)
+WARNING = (NB: DEBUG scope is limited when CLEAN is enabled)
 endif
 endif
 
 # ordinary clean: destroys workdirs but not the corresponding results
 clean:
-	@echo '** cleaning up $(WARNING)'
+	@echo "$(TIME) cleaning up $(WARNING)"
 	@find -name '*~' -delete >&/dev/null ||:
 	@if [ -L build -a -d build/ ]; then \
-		$(MAKE) -C build $@ GLOBAL_BUILDDIR=$(shell readlink build) $(LOG) ||:; \
+		$(MAKE) -C build $@ \
+			GLOBAL_BUILDDIR=$(shell readlink build) $(LOG) ||:; \
 	fi
 
 # there can be some sense in writing log here even if normally
@@ -26,7 +27,8 @@ clean:
 distclean: clean
 	@if [ -L build -a -d build/ ]; then \
 		rm -rf build/.git; \
-		$(MAKE) -C build $@ GLOBAL_BUILDDIR=$(shell readlink build) $(LOG) || \
+		$(MAKE) -C build $@ \
+			GLOBAL_BUILDDIR=$(shell readlink build) $(LOG) || \
 			rm -rf build/; \
 		rm -rf $(shell readlink build); \
 	fi

lib/log.mk

@@ -22,6 +22,8 @@ MAKE += -s
 LOG = 2>>$(BUILDLOG) >/dev/null
 endif
 
+# in build.mk, naive TIME gets expanded a bit too early (no need to export btw)
 DATE = $(shell date +%Y%m%d)
+TIME = `date +%H:%M:%S`
 
 export BUILDLOG DATE DEBUG GLOBAL_DEBUG GLOBAL_VERBOSE LOG MAKE SHELL

lib/profile.mk

@@ -35,7 +35,7 @@ SHORTEN = $(shell \
 
 # step 1: initialize the off-tree mkimage profile (BUILDDIR)
 profile/init: distclean
-	@echo -n "** initializing BUILDDIR: "
+	@echo -n "$(TIME) initializing BUILDDIR: "
 	@rsync -qaH --delete image.in/ "$(BUILDDIR)"/
 	@mkdir "$(BUILDDIR)"/.mki	# mkimage toplevel marker
 	@$(call put,ifndef DISTCFG_MK)
@@ -71,7 +71,7 @@ profile/init: distclean
 	fi $(SHORTEN)
 
 profile/bare: profile/init
-	@echo "** preparing distro config$${DEBUG:+: see $(CONFIG)}" \
+	@echo "$(TIME) preparing distro config$${DEBUG:+: see $(CONFIG)}" \
 		$(SHORTEN)
 	@$(call try,MKIMAGE_PREFIX,/usr/share/mkimage)
 	@$(call try,GLOBAL_VERBOSE,)