build system cleanups

1 files changed, 18 insertions, 14 deletions

diff --git a/Makefile b/Makefile
index 1290a94..9f7a5f5 100644
--- a/Makefile
+++ b/Makefile
@@ -118,9 +118,10 @@ update-submodules:
 install-submodules: cmd=install
 install-submodules: update-submodules $(INSTALL_SUBMODULES)
 
-rootfs = rootfs/_filesystem/samizdat.seed.btrfs
-patchfs = $(patsubst %.seed.btrfs,%.patch.btrfs,$(rootfs))
-rootfs_verity = $(addsuffix .verity,$(rootfs) $(patchfs))
+rootfsdir = rootfs/_filesystem
+rootfs  = $(rootfsdir)/samizdat.seed.btrfs
+patchfs = $(rootfsdir)/samizdat.patch.btrfs
+rootfs_verity = $(addprefix _build/,$(addsuffix .verity,$(notdir $(rootfs) $(patchfs))))
 
 .PHONY: rootfs rootfs-deps
 rootfs-deps:
@@ -129,7 +130,7 @@ rootfs-deps:
 
 btrfs_images = $(rootfs) $(patchfs)
 rootfs-clean:
-        make -C rootfs clean all
+        make -C rootfs clean
 
 rootfs: rootfs-deps $(btrfs_images) $(rootfs_verity)
         sudo mkdir -p /srv/nbd
@@ -138,9 +139,8 @@ ifneq (,$(patchfs))
         sudo ln -sf "$$PWD"/$(patchfs) /srv/nbd/samizdat.patch.btrfs
 endif
 
-FORCE:
-$(btrfs_images): FORCE
-        $(MAKE) -C rootfs $(notdir $@)
+rootfs/%.btrfs:
+        $(MAKE) -C rootfs $(@:rootfs/%=%)
 
 boot: rootfs
         sudo update-initramfs -u
@@ -154,8 +154,10 @@ get_min_size="$$(btrfs inspect-internal min-dev-size --id 1 $@.mnt | (read b _;
 
 verity_root_hash = $(shell sed -ne 's/^Root hash:[ \t]*//p' $<)
 
-%.verity.log: %.verity
-%.verity: %
+_build:
+        mkdir $@
+
+_build/%.verity: rootfs/_filesystem/% | _build
         rm -f $@~tmp
         sudo veritysetup format $^ $@~tmp > $@.log~tmp
         sudo chmod 644 $@~tmp
@@ -164,16 +166,13 @@ verity_root_hash = $(shell sed -ne 's/^Root hash:[ \t]*//p' $<)
 
 root_hash = $(shell sed -ne 's/^Root hash: *//p' < $<.log)
 
-veritymount: $(rootfs).verity.log
+veritymount: _build/$(notdir $(rootfs)).verity.log
         @sudo veritysetup remove samizverity >/dev/null 2>&1 || true
         sudo veritysetup create samizverity $(basename $(basename $<)) \
                               $(basename $<) \
                               $(verity_root_hash)
         sudo veritysetup remove samizverity
 
-rootfs/%.btrfs:
-        $(SUDO_MAKE) -C rootfs $(notdir $@)
-
 debian_dist := $(shell . /etc/os-release && printf %s $$VERSION_CODENAME)
 
 stale = [ ! -e $@ ] || [ $$(( $$(date +%s) - $$(date -r $@ +%s) )) -gt 36000 ]
@@ -182,7 +181,12 @@ apt = $(shell which apt || which apt-get)
 
 .PHONY: apt-get-update-stamp
 apt-get-update-stamp:
-        @if $(stale); then set -x; sudo $(apt) update && touch $@; fi
+        @if $(stale) \
+        then \
+          set -x; \
+          sudo dpkg --add-architecture i386; \
+          sudo $(apt) update && touch $@; \
+        fi
 
 rootfs/seed.iso: $(rootfs) $(if $(VERITY),$(addprefix $(rootfs),.verity .verity.log))
         rm -f $@~tmp