Rewrite to some makefile crap

.gitignore

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+/out

Makefile

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+OUT = out
+MAKEROOT = ./makeroot.sh
+
+ROOTS = appstore alpine
+ROOT_TARS = $(ROOTS:%=$(OUT)/%.tar.gz)
+
+.PHONY: all
+all: $(OUT) $(ROOT_TARS)
+
+$(OUT):
+	mkdir -p $@
+.PHONY: clean
+clean:
+	rm -rf $(OUT)
+
+define download-root
+$$(OUT)/$(notdir $(1)):
+	curl -L -o $$@ $(1)
+endef
+
+define make-root
+$$(OUT)/$(1).tar.gz: $$(MAKEROOT) $(1).sh $$(OUT)/$(2).tar.gz
+	$$(MAKEROOT) $$@ $$(OUT)/$(2).tar.gz $(1).sh
+endef
+
+$(eval $(call download-root,http://dl-cdn.alpinelinux.org/alpine/v3.12/releases/x86/alpine-minirootfs-3.12.0-x86.tar.gz))
+$(eval $(call make-root,alpine,alpine-minirootfs-3.12.0-x86))
+$(eval $(call make-root,appstore,alpine-minirootfs-3.12.0-x86))

alpine.sh

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+script <<END
+cat >/etc/motd <<MOTD
+Welcome to Alpine!
+
+You can install packages with: apk add <package>
+
+You may change this message by editing /etc/motd.
+
+MOTD
+END

appstore.sh

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+script <<END
+apk del apk-tools
+rm -rf /usr/share/apk
+: >/etc/motd
+END

makeroot.sh

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+#!/bin/sh
+output="$1"
+input="$2"
+script="$3"
+
+dir="$(dirname "$0")"
+root="$dir/root"
+b="$dir/../../build/"
+
+function script() {
+    "$b/ish" -f "$root" /bin/sh -
+}
+
+rm -rf "$root"
+rm -f "$output"
+"$b/tools/fakefsify" "$input" "$root"
+source "$script"
+"$b/tools/unfakefsify" "$root" "$output"
+rm -rf "$root"