test: namespace cleanup, common -> src, tenv -> lib, etc.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

test/lib/sysroot.mk

@@ -0,0 +1,77 @@
+# Root file system for test environment.
+#
+# Copyright (c) 2021  Jacques de Laval <jacques@de-laval.se>
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+
+srcdir         ?= ../
+SKEL           ?= $(srcdir)/skel
+DEST           ?= ../sysroot
+
+CACHE          ?= ~/.cache
+ARCH           ?= x86_64
+
+FINITBIN       ?= ./sbin/finit
+
+BBVER          ?= 1_35_0
+BBBIN           = busybox-$(ARCH)
+BBHOME         ?= https://github.com/troglobit/busybox-builder/releases/download
+BBURL          ?= $(BBHOME)/$(BBVER)/$(BBBIN)
+
+_libs_src       = $(shell ldd $(FINITBIN) | grep -Eo '/[^ ]+')
+libs            = $(foreach path,$(_libs_src),$(abspath $(DEST))$(path))
+
+all: $(libs) $(DEST)/bin/$(BBBIN)
+	@(cd $(DEST);					\
+	for prg in `./bin/$(BBBIN) --list-full`; do 	\
+		ln -sf /bin/$(BBBIN) $$prg;		\
+	done)
+
+$(DEST)/bin/$(BBBIN).sha256:
+	@mkdir -p $(DEST)
+	@cp -a $(SKEL)/* $(DEST)/
+	@chmod -R u+w $(DEST)/
+	@find $(DEST) -name .empty -delete
+
+$(DEST)/bin/$(BBBIN): $(DEST)/bin/$(BBBIN).sha256
+	@(cd $(dir $@);								\
+	if ! sha256sum --status -c $(BBBIN).sha256 2>/dev/null; then		\
+		if [ -d $(CACHE) ]; then					\
+			echo "Cannot find $(BBBIN), checking $(CACHE) ...";	\
+			cd $(CACHE);						\
+			cp -v $(DEST)/bin/$(BBBIN).sha256 .;			\
+			if ! sha256sum --status -c $(BBBIN).sha256; then	\
+				echo "No $(BBBIN), downloading $(BBURL) ...";	\
+				wget -O $(BBBIN) $(BBURL);			\
+			else							\
+				echo "Found valid $(BBBIN) in cache!";		\
+			fi;							\
+			cp $(BBBIN) $@;						\
+			cd $(dir $@);						\
+		else								\
+			echo "Cannot find $(BBBIN), downloading ...";		\
+			wget -O $@ $(BBURL);					\
+		fi;								\
+		sha256sum -c $(BBBIN).sha256 || (rm $@; false);			\
+	fi)
+	@chmod +x $@
+
+$(libs): $(DEST)/bin/$(BBBIN).sha256
+	mkdir -p $(dir $@)
+	cp $(patsubst $(abspath $(DEST))%,%,$@) $@