mk: re-split tree logic to include/tree.sh

I really think mk should just be a small stub.

Better to keep everything separate.

Signed-off-by: Leah Rowe <leah@libreboot.org>

2 files changed, 345 insertions, 342 deletions

diff --git a/include/tree.sh b/include/tree.sh
new file mode 100644
index 00000000..4d0c533d
--- /dev/null
+++ b/include/tree.sh
@@ -0,0 +1,344 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+# Copyright (c) 2022-2023 Alper Nebi Yasak <alpernebiyasak@gmail.com>
+# Copyright (c) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
+# Copyright (c) 2023-2025 Leah Rowe <leah@libreboot.org>
+
+eval "`setvars "" xarch srcdir premake gnatdir xlang mode makeargs elfdir cmd \
+    project target target_dir targets xtree _f release bootstrapargs mkhelper \
+    autoconfargs listfile autogenargs btype rev build_depend gccdir cmakedir \
+    defconfig postmake mkhelpercfg dry dest_dir mdir cleanargs gccver gccfull \
+    gnatver gnatfull do_make badhash tree`"
+
+trees()
+{
+	flags="f:b:m:u:c:x:s:l:n:d:"
+
+	while getopts $flags option; do
+		[ -n "$_f" ] && err "only one flag is permitted"
+		_f="$1"
+
+		case "$_f" in
+		-d) dry=":" ;;
+		-b) : ;;
+		-u) mode="oldconfig" ;;
+		-m) mode="menuconfig" ;;
+		-c) mode="distclean" ;;
+		-x) mode="crossgcc-clean" ;;
+		-f)
+			do_make="n"
+			dry=":" ;;
+		-s) mode="savedefconfig" ;;
+		-l) mode="olddefconfig" ;;
+		-n) mode="nconfig" ;;
+		*) err "invalid option '-$option'" ;;
+		esac
+
+		if [ -z "${OPTARG+x}" ]; then
+			shift 1
+			break
+		fi
+
+		project="${OPTARG#src/}"
+		shift 2
+	done
+	[ -z "$_f" ] && err "missing flag ($flags)"
+	if [ -z "$project" ]; then
+		mk $_f $(ls -1 config/git)
+		return 1
+	fi
+
+	[ -f "config/git/$project/pkg.cfg" ] || \
+	    err "config/git/$project/pkg.cfg missing"
+
+	for d in "elf" "config/data" "config" "src"; do
+		eval "${d#*/}dir=\"$d/$project\""
+	done
+	dest_dir="$elfdir"
+
+	listfile="$datadir/build.list"
+	[ -f "$listfile" ] || listfile="" # optional on all projects
+
+	mkhelpercfg="$datadir/mkhelper.cfg"
+	if e "$mkhelpercfg" f missing; then
+		mkhelpercfg="$xbmktmp/mkhelper.cfg"
+		x_ touch "$mkhelpercfg"
+	fi
+
+	targets="$*"
+	cmd="build_targets $targets"
+	singletree "$project" && cmd="build_project"
+
+	remkdir "${tmpgit%/*}"
+}
+
+build_project()
+{
+	configure_project "$configdir" || return 0
+	[ ! -f "$listfile" ] || $dry elfcheck || return 0
+
+	[ "$mode" = "distclean" ] && mode="clean"
+	run_make_command || return 0
+
+	[ -n "$mode" ] || $dry copy_elf; :
+}
+
+build_targets()
+{
+	[ -d "$configdir" ] || err "directory, $configdir, does not exist"
+	[ $# -gt 0 ] || targets="$(ls -1 "$configdir")" || err "!o $configdir"
+
+	for x in $targets; do
+		unset CROSS_COMPILE
+		export PATH="$xbmkpath"
+		[ "$x" = "list" ] && x_ ls -1 "config/$project" && \
+		    listfile="" && break
+
+		target="$x"
+		printf "'make %s', '%s', '%s'\n" "$mode" "$project" "$target"
+		x_ handle_defconfig
+
+		[ -n "$mode" ] || x_ $postmake
+	done; :
+}
+
+handle_defconfig()
+{
+	target_dir="$configdir/$target"
+
+	[ -f "CHANGELOG" ] || fetch_project "$project"
+	configure_project "$target_dir" || return 0
+	x_ mkdir -p "$elfdir/$target"
+
+	chkvars tree
+	srcdir="src/$project/$tree"
+
+	if [ "$mode" = "distclean" ] || [ "$mode" = "crossgcc-clean" ]; then
+		[ -d "$srcdir" ] || return 0
+	fi
+	[ -z "$mode" ] && for _xarch in $xarch; do
+		$dry check_cross_compiler "$_xarch"
+	done; :
+
+	for y in "$target_dir/config"/*; do
+		[ "$_f" = "-d" ] || [ -f "$y" ] || continue
+		[ "$_f" = "-d" ] || defconfig="$y"
+
+		[ -n "$mode" ] || check_defconfig || continue
+		handle_makefile
+		[ -n "$mode" ] || $dry copy_elf
+	done; :
+}
+
+configure_project()
+{
+	eval "`setvars "" cleanargs build_depend autoconfargs xtree postmake \
+	    makeargs btype mkhelper bootstrapargs premake release xlang xarch \
+	    badhash`"
+	_tcfg="$1/target.cfg"
+	[ -f "$_tcfg" ] || btype="auto"
+	e "$datadir/mkhelper.cfg" f && eval "`setcfg "$datadir/mkhelper.cfg"`"
+
+	while e "$_tcfg" f || [ "$cmd" != "build_project" ]; do
+		eval "`setvars "" rev tree`"
+		eval "`setcfg "$_tcfg"`"
+		printf "Loading %s config: %s\n" "$project" "$_tcfg"
+
+		[ "$_f" = "-d" ] && build_depend="" # dry run
+		[ "$cmd" = "build_project" ] && break
+		[ "$do_make" != "n" ] && break
+
+		[ "${_tcfg%/*/target.cfg}" = "${_tcfg%"/$tree/target.cfg"}" ] \
+		    && break
+		_tcfg="${_tcfg%/*/target.cfg}/$tree/target.cfg"
+	done
+	[ "$XBMK_RELEASE" = "y" ] && [ "$release" = "n" ] && return 1
+	[ -z "$btype" ] || [ "${mode%config}" = "$mode" ] || return 1
+	[ -z "$mode" ] && $dry build_dependencies
+
+	mdir="$xbmkpwd/config/submodule/$project"
+	[ -n "$tree" ] && mdir="$mdir/$tree"
+	[ -f "CHANGELOG" ] || check_project_hashes
+
+	if [ "$do_make" = "n" ]; then
+		[ -f "CHANGELOG" ] || fetch_${cmd#build_}
+		return 1
+	fi
+	x_ ./mk -f "$project" "$target"
+}
+
+build_dependencies()
+{
+	for bd in $build_depend; do
+		bd_p="${bd%%/*}"
+		bd_t="${bd##*/}"
+		[ -z "$bd_p" ] && $dry err "$project/$tree: !bd '$bd'"
+		[ "${bd##*/}" = "$bd" ] && bd_t=""
+		[ -z "$bd_p" ] || $dry x_ ./mk -b $bd_p $bd_t; :
+	done; :
+}
+
+check_project_hashes()
+{
+	old_pjhash="" && x_ mkdir -p "$XBMK_CACHE/hash"
+	[ ! -f "$XBMK_CACHE/hash/$project$tree" ] || \
+	    read -r old_pjhash < "$XBMK_CACHE/hash/$project$tree"
+
+	fx_ "x_ sha512sum" find "$datadir" "$configdir/$tree" "$mdir" \
+	    -type f -not -path "*/.git*/*" | awk '{print $1}' > \
+	    "$xbmktmp/project.hash" || err "!h $project $tree"
+
+	pjhash="$(sha512sum "$xbmktmp/project.hash" | awk '{print $1}')" || :
+	[ "$pjhash" != "$old_pjhash" ] && badhash="y"
+	[ -f "$XBMK_CACHE/hash/$project$tree" ] || badhash="y"
+
+	printf "%s\n" "$pjhash" > "$XBMK_CACHE/hash/$project$tree" || \
+	    err "!mk $XBMK_CACHE/hash/$project$tree"
+
+	[ "$badhash" != "y" ] || x_ rm -Rf "src/$project/$tree" \
+	    "elf/$project/$tree" "elf/$project/$target"; :
+}
+
+check_cross_compiler()
+{
+	cbdir="src/coreboot/$tree"
+	[ "$project" != "coreboot" ] && cbdir="src/coreboot/default"
+	[ -n "$xtree" ] && cbdir="src/coreboot/$xtree"
+
+	x_ ./mk -f coreboot "${cbdir#src/coreboot/}"
+
+	export PATH="$xbmkpwd/$cbdir/util/crossgcc/xgcc/bin:$PATH"
+	export CROSS_COMPILE="${xarch% *}-"
+	[ -n "$xlang" ] && export BUILD_LANGUAGES="$xlang"
+
+	# match gnat-X to gcc
+	check_gnu_path gcc gnat || x_ check_gnu_path gnat gcc
+
+	xfix="${1%-*}" && [ "$xfix" = "x86_64" ] && xfix="x64"
+	xgccargs="crossgcc-$xfix UPDATED_SUBMODULES=1 CPUS=$XBMK_THREADS"
+	make -C "$cbdir" $xgccargs || x_ make -C "$cbdir" $xgccargs
+
+	# we only want to mess with hostcc to build xgcc
+	remkdir "$XBMK_CACHE/gnupath"
+}
+
+# fix mismatching gcc/gnat versions on debian trixie/sid. as of december 2024,
+# trixie/sid had gnat-13 as gnat and gcc-14 as gcc, but has gnat-14 in apt. in
+# some cases, gcc 13+14 and gnat-13 are present; or gnat-14 and gcc-14, but
+# gnat in PATH never resolves to gnat-14, because gnat-14 was "experimental"
+check_gnu_path()
+{
+	command -v "$1" 1>/dev/null || err "Host '$1' unavailable"
+
+	eval "`setvars "" gccver gccfull gnatver gnatfull gccdir gnatdir`"
+	x_ gnu_setver "$1" "$1" || err "Command '$1' unavailable."
+	gnu_setver "$2" "$2" || :
+
+	eval "[ -z \"\$$1ver\" ] && err \"Cannot detect host '$1' version\""
+	[ "$gnatfull" = "$gccfull" ] && return 0
+
+	eval "$1dir=\"$(dirname "$(command -v "$1")")\""
+	eval "_gnudir=\"\$$1dir\"; _gnuver=\"\$$1ver\""
+	for _bin in "$_gnudir/$2-"*; do
+		[ "${_bin#"$_gnudir/$2-"}" = "$_gnuver" ] && [ -x "$_bin" ] \
+		    && _gnuver="${_bin#"$_gnudir/$2-"}" && break; :
+	done
+	gnu_setver "$2" "$_gnudir/$2-$_gnuver" || return 1
+	[ "$gnatfull" = "$gccfull" ] || return 1
+
+	(
+	remkdir "$XBMK_CACHE/gnupath" && x_ cd "$XBMK_CACHE/gnupath"
+	for _gnubin in "$_gnudir/$2"*"-$_gnuver"; do
+		_gnuutil="${_gnubin##*/}" && [ -e "$_gnubin" ] && \
+		    x_ ln -s "$_gnubin" "${_gnuutil%"-$_gnuver"}"
+	done
+	) || err "Cannot create $2-$_gnuver link in $_gnudir"; :
+}
+
+gnu_setver()
+{
+	eval "$2 --version 1>/dev/null 2>/dev/null || return 1"
+	eval "$1ver=\"`"$2" --version 2>/dev/null | head -n1`\""
+	eval "$1ver=\"\${$1ver##* }\""
+	eval "$1full=\"\$$1ver\""
+	eval "$1ver=\"\${$1ver%%.*}\""; :
+}
+
+check_defconfig()
+{
+	[ -f "$defconfig" ] || $dry err "$project/$target: missing defconfig"
+	dest_dir="$elfdir/$target/${defconfig#"$target_dir/config/"}"
+
+	$dry elfcheck || return 1 # skip build if a previous one exists
+	$dry x_ mkdir -p "$dest_dir"
+}
+
+elfcheck()
+{
+	# TODO: *STILL* very hacky check. do it properly (based on build.list)
+	( fx_ "exit 1" find "$dest_dir" -type f ) || return 1; :
+}
+
+handle_makefile()
+{
+	$dry check_makefile "$srcdir" && x_ make -C "$srcdir" $cleanargs clean
+
+	[ -f "$defconfig" ] && x_ cp "$defconfig" "$srcdir/.config"
+	[ -n "$mode" ] || [ -n "$btype" ] || $dry make -C \
+	    "$srcdir" silentoldconfig || make -C "$srcdir" oldconfig || :
+
+	run_make_command || err "handle_makefile $srcdir: no makefile!"
+
+	_copy=".config" && [ "$mode" = "savedefconfig" ] && _copy="defconfig"
+	[ "${mode%config}" = "$mode" ] || \
+	    $dry x_ cp "$srcdir/$_copy" "$defconfig"
+
+	[ -e "$srcdir/.git" ] && [ "$project" = "u-boot" ] && \
+	    [ "$mode" = "distclean" ] && \
+		$dry x_ git -C "$srcdir" $cleanargs clean -fdx; :
+}
+
+run_make_command()
+{
+	[ -n "$mode" ] || x_ $premake
+
+	$dry check_cmake "$srcdir" && [ -z "$mode" ] && \
+	    $dry check_autoconf "$srcdir"
+	$dry check_makefile "$srcdir" || return 1
+
+	$dry x_ make -C "$srcdir" $mode -j$XBMK_THREADS $makeargs
+	[ -n "$mode" ] || x_ $mkhelper
+
+	[ "$mode" != "clean" ] || \
+	    $dry make -C "$srcdir" $cleanargs distclean || :; :
+}
+
+check_cmake()
+{
+	[ -z "$cmakedir" ] || $dry check_makefile "$1" || cmake -B "$1" \
+	    "$1/$cmakedir" || $dry x_ check_makefile "$1"
+	[ -z "$cmakedir" ] || $dry x_ check_makefile "$1"; :
+}
+
+check_autoconf()
+{
+	(
+	cd "$1" || err "!cd $1"
+	[ -f "bootstrap" ] && x_ ./bootstrap $bootstrapargs
+	[ -f "autogen.sh" ] && x_ ./autogen.sh $autogenargs
+	[ -f "configure" ] && x_ ./configure $autoconfargs; :
+	) || err "can't bootstrap project: $1"; :
+}
+
+check_makefile()
+{
+	[ -f "$1/Makefile" ] || [ -f "$1/makefile" ] || \
+	    [ -f "$1/GNUmakefile" ] || return 1; :
+}
+
+copy_elf()
+{
+	[ -f "$listfile" ] && x_ mkdir -p "$dest_dir" && while read -r f; do
+		[ -f "$srcdir/$f" ] && x_ cp "$srcdir/$f" "$dest_dir"
+	done < "$listfile"
+	x_ make clean -C "$srcdir" $cleanargs
+}
diff --git a/mk b/mk
index 324e56cc..2b1191bb 100755
--- a/mk
+++ b/mk
@@ -2,8 +2,6 @@
 # SPDX-License-Identifier: GPL-3.0-or-later
 # Copyright (c) 2020-2025 Leah Rowe <leah@libreboot.org>
 # Copyright (c) 2022 Caleb La Grange <thonkpeasant@protonmail.com>
-# Copyright (c) 2022 Ferass El Hafidi <vitali64pmemail@protonmail.com>
-# Copyright (c) 2022-2023 Alper Nebi Yasak <alpernebiyasak@gmail.com>
 
 set -u -e
 
@@ -38,346 +36,7 @@ main "$@" && exit 0
 # what follows was formerly script/trees, whose main() is now trees()
 
 . "include/git.sh"
-
-eval "`setvars "" xarch srcdir premake gnatdir xlang mode makeargs elfdir cmd \
-    project target target_dir targets xtree _f release bootstrapargs mkhelper \
-    autoconfargs listfile autogenargs btype rev build_depend gccdir cmakedir \
-    defconfig postmake mkhelpercfg dry dest_dir mdir cleanargs gccver gccfull \
-    gnatver gnatfull do_make badhash tree`"
-
-trees()
-{
-	flags="f:b:m:u:c:x:s:l:n:d:"
-
-	while getopts $flags option; do
-		[ -n "$_f" ] && err "only one flag is permitted"
-		_f="$1"
-
-		case "$_f" in
-		-d) dry=":" ;;
-		-b) : ;;
-		-u) mode="oldconfig" ;;
-		-m) mode="menuconfig" ;;
-		-c) mode="distclean" ;;
-		-x) mode="crossgcc-clean" ;;
-		-f)
-			do_make="n"
-			dry=":" ;;
-		-s) mode="savedefconfig" ;;
-		-l) mode="olddefconfig" ;;
-		-n) mode="nconfig" ;;
-		*) err "invalid option '-$option'" ;;
-		esac
-
-		if [ -z "${OPTARG+x}" ]; then
-			shift 1
-			break
-		fi
-
-		project="${OPTARG#src/}"
-		shift 2
-	done
-	[ -z "$_f" ] && err "missing flag ($flags)"
-	if [ -z "$project" ]; then
-		mk $_f $(ls -1 config/git)
-		return 1
-	fi
-
-	[ -f "config/git/$project/pkg.cfg" ] || \
-	    err "config/git/$project/pkg.cfg missing"
-
-	for d in "elf" "config/data" "config" "src"; do
-		eval "${d#*/}dir=\"$d/$project\""
-	done
-	dest_dir="$elfdir"
-
-	listfile="$datadir/build.list"
-	[ -f "$listfile" ] || listfile="" # optional on all projects
-
-	mkhelpercfg="$datadir/mkhelper.cfg"
-	if e "$mkhelpercfg" f missing; then
-		mkhelpercfg="$xbmktmp/mkhelper.cfg"
-		x_ touch "$mkhelpercfg"
-	fi
-
-	targets="$*"
-	cmd="build_targets $targets"
-	singletree "$project" && cmd="build_project"
-
-	remkdir "${tmpgit%/*}"
-}
-
-build_project()
-{
-	configure_project "$configdir" || return 0
-	[ ! -f "$listfile" ] || $dry elfcheck || return 0
-
-	[ "$mode" = "distclean" ] && mode="clean"
-	run_make_command || return 0
-
-	[ -n "$mode" ] || $dry copy_elf; :
-}
-
-build_targets()
-{
-	[ -d "$configdir" ] || err "directory, $configdir, does not exist"
-	[ $# -gt 0 ] || targets="$(ls -1 "$configdir")" || err "!o $configdir"
-
-	for x in $targets; do
-		unset CROSS_COMPILE
-		export PATH="$xbmkpath"
-		[ "$x" = "list" ] && x_ ls -1 "config/$project" && \
-		    listfile="" && break
-
-		target="$x"
-		printf "'make %s', '%s', '%s'\n" "$mode" "$project" "$target"
-		x_ handle_defconfig
-
-		[ -n "$mode" ] || x_ $postmake
-	done; :
-}
-
-handle_defconfig()
-{
-	target_dir="$configdir/$target"
-
-	[ -f "CHANGELOG" ] || fetch_project "$project"
-	configure_project "$target_dir" || return 0
-	x_ mkdir -p "$elfdir/$target"
-
-	chkvars tree
-	srcdir="src/$project/$tree"
-
-	if [ "$mode" = "distclean" ] || [ "$mode" = "crossgcc-clean" ]; then
-		[ -d "$srcdir" ] || return 0
-	fi
-	[ -z "$mode" ] && for _xarch in $xarch; do
-		$dry check_cross_compiler "$_xarch"
-	done; :
-
-	for y in "$target_dir/config"/*; do
-		[ "$_f" = "-d" ] || [ -f "$y" ] || continue
-		[ "$_f" = "-d" ] || defconfig="$y"
-
-		[ -n "$mode" ] || check_defconfig || continue
-		handle_makefile
-		[ -n "$mode" ] || $dry copy_elf
-	done; :
-}
-
-configure_project()
-{
-	eval "`setvars "" cleanargs build_depend autoconfargs xtree postmake \
-	    makeargs btype mkhelper bootstrapargs premake release xlang xarch \
-	    badhash`"
-	_tcfg="$1/target.cfg"
-	[ -f "$_tcfg" ] || btype="auto"
-	e "$datadir/mkhelper.cfg" f && eval "`setcfg "$datadir/mkhelper.cfg"`"
-
-	while e "$_tcfg" f || [ "$cmd" != "build_project" ]; do
-		eval "`setvars "" rev tree`"
-		eval "`setcfg "$_tcfg"`"
-		printf "Loading %s config: %s\n" "$project" "$_tcfg"
-
-		[ "$_f" = "-d" ] && build_depend="" # dry run
-		[ "$cmd" = "build_project" ] && break
-		[ "$do_make" != "n" ] && break
-
-		[ "${_tcfg%/*/target.cfg}" = "${_tcfg%"/$tree/target.cfg"}" ] \
-		    && break
-		_tcfg="${_tcfg%/*/target.cfg}/$tree/target.cfg"
-	done
-	[ "$XBMK_RELEASE" = "y" ] && [ "$release" = "n" ] && return 1
-	[ -z "$btype" ] || [ "${mode%config}" = "$mode" ] || return 1
-	[ -z "$mode" ] && $dry build_dependencies
-
-	mdir="$xbmkpwd/config/submodule/$project"
-	[ -n "$tree" ] && mdir="$mdir/$tree"
-	[ -f "CHANGELOG" ] || check_project_hashes
-
-	if [ "$do_make" = "n" ]; then
-		[ -f "CHANGELOG" ] || fetch_${cmd#build_}
-		return 1
-	fi
-	x_ ./mk -f "$project" "$target"
-}
-
-build_dependencies()
-{
-	for bd in $build_depend; do
-		bd_p="${bd%%/*}"
-		bd_t="${bd##*/}"
-		[ -z "$bd_p" ] && $dry err "$project/$tree: !bd '$bd'"
-		[ "${bd##*/}" = "$bd" ] && bd_t=""
-		[ -z "$bd_p" ] || $dry x_ ./mk -b $bd_p $bd_t; :
-	done; :
-}
-
-check_project_hashes()
-{
-	old_pjhash="" && x_ mkdir -p "$XBMK_CACHE/hash"
-	[ ! -f "$XBMK_CACHE/hash/$project$tree" ] || \
-	    read -r old_pjhash < "$XBMK_CACHE/hash/$project$tree"
-
-	fx_ "x_ sha512sum" find "$datadir" "$configdir/$tree" "$mdir" \
-	    -type f -not -path "*/.git*/*" | awk '{print $1}' > \
-	    "$xbmktmp/project.hash" || err "!h $project $tree"
-
-	pjhash="$(sha512sum "$xbmktmp/project.hash" | awk '{print $1}')" || :
-	[ "$pjhash" != "$old_pjhash" ] && badhash="y"
-	[ -f "$XBMK_CACHE/hash/$project$tree" ] || badhash="y"
-
-	printf "%s\n" "$pjhash" > "$XBMK_CACHE/hash/$project$tree" || \
-	    err "!mk $XBMK_CACHE/hash/$project$tree"
-
-	[ "$badhash" != "y" ] || x_ rm -Rf "src/$project/$tree" \
-	    "elf/$project/$tree" "elf/$project/$target"; :
-}
-
-check_cross_compiler()
-{
-	cbdir="src/coreboot/$tree"
-	[ "$project" != "coreboot" ] && cbdir="src/coreboot/default"
-	[ -n "$xtree" ] && cbdir="src/coreboot/$xtree"
-
-	x_ ./mk -f coreboot "${cbdir#src/coreboot/}"
-
-	export PATH="$xbmkpwd/$cbdir/util/crossgcc/xgcc/bin:$PATH"
-	export CROSS_COMPILE="${xarch% *}-"
-	[ -n "$xlang" ] && export BUILD_LANGUAGES="$xlang"
-
-	# match gnat-X to gcc
-	check_gnu_path gcc gnat || x_ check_gnu_path gnat gcc
-
-	xfix="${1%-*}" && [ "$xfix" = "x86_64" ] && xfix="x64"
-	xgccargs="crossgcc-$xfix UPDATED_SUBMODULES=1 CPUS=$XBMK_THREADS"
-	make -C "$cbdir" $xgccargs || x_ make -C "$cbdir" $xgccargs
-
-	# we only want to mess with hostcc to build xgcc
-	remkdir "$XBMK_CACHE/gnupath"
-}
-
-# fix mismatching gcc/gnat versions on debian trixie/sid. as of december 2024,
-# trixie/sid had gnat-13 as gnat and gcc-14 as gcc, but has gnat-14 in apt. in
-# some cases, gcc 13+14 and gnat-13 are present; or gnat-14 and gcc-14, but
-# gnat in PATH never resolves to gnat-14, because gnat-14 was "experimental"
-check_gnu_path()
-{
-	command -v "$1" 1>/dev/null || err "Host '$1' unavailable"
-
-	eval "`setvars "" gccver gccfull gnatver gnatfull gccdir gnatdir`"
-	x_ gnu_setver "$1" "$1" || err "Command '$1' unavailable."
-	gnu_setver "$2" "$2" || :
-
-	eval "[ -z \"\$$1ver\" ] && err \"Cannot detect host '$1' version\""
-	[ "$gnatfull" = "$gccfull" ] && return 0
-
-	eval "$1dir=\"$(dirname "$(command -v "$1")")\""
-	eval "_gnudir=\"\$$1dir\"; _gnuver=\"\$$1ver\""
-	for _bin in "$_gnudir/$2-"*; do
-		[ "${_bin#"$_gnudir/$2-"}" = "$_gnuver" ] && [ -x "$_bin" ] \
-		    && _gnuver="${_bin#"$_gnudir/$2-"}" && break; :
-	done
-	gnu_setver "$2" "$_gnudir/$2-$_gnuver" || return 1
-	[ "$gnatfull" = "$gccfull" ] || return 1
-
-	(
-	remkdir "$XBMK_CACHE/gnupath" && x_ cd "$XBMK_CACHE/gnupath"
-	for _gnubin in "$_gnudir/$2"*"-$_gnuver"; do
-		_gnuutil="${_gnubin##*/}" && [ -e "$_gnubin" ] && \
-		    x_ ln -s "$_gnubin" "${_gnuutil%"-$_gnuver"}"
-	done
-	) || err "Cannot create $2-$_gnuver link in $_gnudir"; :
-}
-
-gnu_setver()
-{
-	eval "$2 --version 1>/dev/null 2>/dev/null || return 1"
-	eval "$1ver=\"`"$2" --version 2>/dev/null | head -n1`\""
-	eval "$1ver=\"\${$1ver##* }\""
-	eval "$1full=\"\$$1ver\""
-	eval "$1ver=\"\${$1ver%%.*}\""; :
-}
-
-check_defconfig()
-{
-	[ -f "$defconfig" ] || $dry err "$project/$target: missing defconfig"
-	dest_dir="$elfdir/$target/${defconfig#"$target_dir/config/"}"
-
-	$dry elfcheck || return 1 # skip build if a previous one exists
-	$dry x_ mkdir -p "$dest_dir"
-}
-
-elfcheck()
-{
-	# TODO: *STILL* very hacky check. do it properly (based on build.list)
-	( fx_ "exit 1" find "$dest_dir" -type f ) || return 1; :
-}
-
-handle_makefile()
-{
-	$dry check_makefile "$srcdir" && x_ make -C "$srcdir" $cleanargs clean
-
-	[ -f "$defconfig" ] && x_ cp "$defconfig" "$srcdir/.config"
-	[ -n "$mode" ] || [ -n "$btype" ] || $dry make -C \
-	    "$srcdir" silentoldconfig || make -C "$srcdir" oldconfig || :
-
-	run_make_command || err "handle_makefile $srcdir: no makefile!"
-
-	_copy=".config" && [ "$mode" = "savedefconfig" ] && _copy="defconfig"
-	[ "${mode%config}" = "$mode" ] || \
-	    $dry x_ cp "$srcdir/$_copy" "$defconfig"
-
-	[ -e "$srcdir/.git" ] && [ "$project" = "u-boot" ] && \
-	    [ "$mode" = "distclean" ] && \
-		$dry x_ git -C "$srcdir" $cleanargs clean -fdx; :
-}
-
-run_make_command()
-{
-	[ -n "$mode" ] || x_ $premake
-
-	$dry check_cmake "$srcdir" && [ -z "$mode" ] && \
-	    $dry check_autoconf "$srcdir"
-	$dry check_makefile "$srcdir" || return 1
-
-	$dry x_ make -C "$srcdir" $mode -j$XBMK_THREADS $makeargs
-	[ -n "$mode" ] || x_ $mkhelper
-
-	[ "$mode" != "clean" ] || \
-	    $dry make -C "$srcdir" $cleanargs distclean || :; :
-}
-
-check_cmake()
-{
-	[ -z "$cmakedir" ] || $dry check_makefile "$1" || cmake -B "$1" \
-	    "$1/$cmakedir" || $dry x_ check_makefile "$1"
-	[ -z "$cmakedir" ] || $dry x_ check_makefile "$1"; :
-}
-
-check_autoconf()
-{
-	(
-	cd "$1" || err "!cd $1"
-	[ -f "bootstrap" ] && x_ ./bootstrap $bootstrapargs
-	[ -f "autogen.sh" ] && x_ ./autogen.sh $autogenargs
-	[ -f "configure" ] && x_ ./configure $autoconfargs; :
-	) || err "can't bootstrap project: $1"; :
-}
-
-check_makefile()
-{
-	[ -f "$1/Makefile" ] || [ -f "$1/makefile" ] || \
-	    [ -f "$1/GNUmakefile" ] || return 1; :
-}
-
-copy_elf()
-{
-	[ -f "$listfile" ] && x_ mkdir -p "$dest_dir" && while read -r f; do
-		[ -f "$srcdir/$f" ] && x_ cp "$srcdir/$f" "$dest_dir"
-	done < "$listfile"
-	x_ make clean -C "$srcdir" $cleanargs
-}
+. "include/tree.sh"
 
 trees "$@" || exit 0
 . "$mkhelpercfg"