From c562f252be28507df1d2f45e1912734e1ef0a8e4 Mon Sep 17 00:00:00 2001
From: Gordon GECOS <u@adam>
Date: Wed, 22 Nov 2023 14:30:53 -0500
Subject: build system cleanups

---
 .gitignore      |  1 +
 Makefile        | 32 ++++++++++++++++++--------------
 fsmgr           |  2 +-
 rootfs/Makefile | 29 +++++++++--------------------
 4 files changed, 29 insertions(+), 35 deletions(-)

diff --git a/.gitignore b/.gitignore
index b4bc1ce..4820162 100644
--- a/.gitignore
+++ b/.gitignore
@@ -58,3 +58,4 @@ apt-get-update-stamp
 *.img
 *.tmp
 samizdat-ficlonerange
+/rootfs/_filesystem/
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
diff --git a/fsmgr b/fsmgr
index 7eda6b8..486fb62 160000
--- a/fsmgr
+++ b/fsmgr
@@ -1 +1 @@
-Subproject commit 7eda6b846463c19411efd2747d3c6c3b3b9d3566
+Subproject commit 486fb62abd0ac5a87a85ca18beb939d21323fad1
diff --git a/rootfs/Makefile b/rootfs/Makefile
index ef2921e..c85132f 100644
--- a/rootfs/Makefile
+++ b/rootfs/Makefile
@@ -6,38 +6,27 @@ endif
 
 sudo := $(shell [ "$$(id -u)" = 0 ] || echo sudo)
 
-rootfs ?= samizdat.seed.btrfs
-patchfs ?= samizdat.patch.btrfs
-
 .DEFAULT_GOAL = all
 
-.PHONY: all rootfs patchfs clean cleaner
-all: $(rootfs) $(patchfs)
+.PHONY: all clean cleaner
+all: $(addprefix _filesystem/samizdat., seed.btrfs patch.btrfs)
+
+_build/%: _build
+_filesystem/%: _filesystem
 
 _build _filesystem:
 	$(sudo) btrfs subvolume create $@
 
-clean = $(patchfs) $(rootfs) $(rootfs:%.seed.btrfs=%.btrfs)
-clean := $(clean) $(clean:%=%.tmp)
-
 clean:
-	rm -f $(clean)
+	btrfs subvolume delete _build
 cleaner: clean
 	-$(sudo) btrfs subvolume delete _filesystem
 
-rootfs: $(rootfs)
-patchfs: $(patchfs)
+_build/%.patch.btrfs: %.seed.btrfs
 
-%.patch.btrfs: %.seed.btrfs
-	$(sudo) $(fsmgr) build $@
+_build/%.seed.btrfs: %.btrfs
 
-%.seed.btrfs: %.btrfs
-	$(sudo) $(fsmgr) build $@
+_filesystem/%.btrfs: _build/%.btrfs
 
 %.btrfs:
 	$(sudo) $(fsmgr) build $@
-
-$(patchfs): $(rootfs)
-
-$(patchfs) $(rootfs):
-	$(sudo) REWRITE_SOURCES_LIST=y $(fsmgr) build $@
-- 
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