# SPDX-License-Identifier: Apache-2.0
# toybox — 0BSD-licensed: https://landley.net/toybox/
# Provides SchOS's core utilities (ls, cat, cp, mv, rm, mkdir, ...) as a
# single multicall binary, installed under sysroot/bin/ once per applet name.
#
# mkfs (tools/mkfs.c) doesn't understand symlinks or hardlink dedup — each
# sysroot/bin/<name> below is a real, independent copy of the same toybox
# binary. That costs disk space per applet instead of one shared inode, but
# needs no changes to mkfs and keeps this Makefile self-contained.

include ../mk/port.mk

TOYBOX_VERSION := 0.8.12
TOYBOX_URL     := http://landley.net/toybox/downloads/toybox-$(TOYBOX_VERSION).tar.gz
TOYBOX_SHA256  := ad88a921133ae2231d9f2df875ec0bd42af4429145caea7d7db9e02208a6fd2e

TARBALL := $(DISTDIR)/toybox-$(TOYBOX_VERSION).tar.gz

CFLAGS  := -static -D__SCHOS__ -I$(MUSL)/include -fno-stack-protector
LDFLAGS := -static -L$(MUSL)/lib -lc

# The applet list is not hard-coded any more: `toybox` with no arguments prints
# exactly the applets the binary was built with, so the install below asks the
# binary itself. A hand-maintained list installed 57 of the ~250 available and
# silently drifted every time the toybox config changed.

$(TARBALL): | $(DISTDIR)
	curl -fsSL -o $@ $(TOYBOX_URL)
	sh $(SHA256CHECK) "$(TOYBOX_SHA256)" "$@"

download: $(TARBALL)

$(SRCDIR): $(TARBALL)
	mkdir -p $(PORTDIR)
	tar -xzf $< -C $(PORTDIR)
	mv $(PORTDIR)/toybox-$(TOYBOX_VERSION) $@

# toybox has no out-of-tree build mode, so its source is copied into $(BUILDDIR)
# and built in place. $(SRCDIR) is an order-only prerequisite (|): the extracted
# tarball never changes, and depending on it normally made a directory mtime
# trigger a rebuild. The rebuild then failed anyway, because `cp -r` over a
# populated $(BUILDDIR) hits "File exists" on kconfig's symlinks — so wipe it
# first and always build from a clean copy.
$(BUILDDIR)/toybox: | $(SRCDIR)
	rm -rf $(BUILDDIR)
	mkdir -p $(BUILDDIR)
	cp -r $(SRCDIR)/. $(BUILDDIR)/
	$(MAKE) -C $(BUILDDIR) defconfig
	$(MAKE) -C $(BUILDDIR) CC="$(CC)" CFLAGS="$(CFLAGS)" LDFLAGS="$(LDFLAGS)"

# Install every applet the binary provides, one name per applet.
#
# mkfs deduplicates by content, so all of these collapse to a single inode with
# many hard links in the image -- the cost is one copy, not one per name. On the
# host we try a hard link first for the same reason and fall back to a copy if
# the filesystem will not take one (NTFS via WSL usually will).
#
# The work hangs off a stamp file rather than off the phony `install` target.
# port.mk declares install .PHONY for every port, so this recipe used to run on
# every single build -- re-creating 236 links whether or not toybox had been
# rebuilt. That is slow on its own, and worse, it bumped the mtime of 236 files
# in sysroot/ every time, which made the top-level build think the staged tree
# had changed and rebuild the whole filesystem image from scratch.
install: $(BUILDDIR)/toybox.installed

$(BUILDDIR)/toybox.installed: $(BUILDDIR)/toybox | $(SYSROOT)/bin
	cp $< $(SYSROOT)/bin/toybox
	chmod 755 $(SYSROOT)/bin/toybox
	@for a in $$($(BUILDDIR)/toybox); do \
	    rm -f $(SYSROOT)/bin/"$$a"; \
	    ln $(SYSROOT)/bin/toybox $(SYSROOT)/bin/"$$a" 2>/dev/null \
	      || cp $< $(SYSROOT)/bin/"$$a"; \
	done
	@echo "toybox: installed $$($(BUILDDIR)/toybox | wc -w) applets"
	@touch $@


clean:
	rm -rf $(PORTDIR)

distclean: clean
	rm -f $(TARBALL)