mk: remove u-boot-specific git-clean handling

yes, make it generalised. use a new variable in
mkhelper.cfg, gitclean and gitcleanargs

not enabled by default, but u-boot enables it. i'm
considering whether to use this by default, as it
is the general policy of lbmk to clean everything
just after a build, as builds are cached out of
tree. this way, we can do re-builds safely for each
project. there are probably a lot of subtle bugs that
might be fixed if we used this

the problem is that this is currently only used on
lbmk.git, but not on libreboot release archives which
lack .git directories; the main one is initialised in
lbmk, but not in upstream sources. we could just initialise
those.

in fact, that is probably what i'm going to do.

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

config/data/u-boot/mkhelper.cfg

@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-3.0-or-later
+
+gitclean="y"
+gitcleanargs="-fdx"

include/env/init.sh

@@ -8,15 +8,12 @@
 projectname="libreboot"
 projectsite="https://libreboot.org/"
 
-sha512sum="util/sbase/sha512sum"
-
 eval "`newvar aur_notice basetmp board checkvarschk checkvarsxbmk configdir \
     datadir is_child python pyver reinstall relname version versiondate \
-    xbmklock xbmkpath xbmkpwd xbmkpwd xbtmp`"
+    xbmklock xbmkpath xbtmp sha512sum`"
 
 xbmk_init()
 {
-	xbmkpwd="`pwd || err "Cannot generate PWD"`" || err "!" xbmk_init "$@"
 	xbmklock="$xbmkpwd/lock"
 	basetmp="$xbmkpwd/xbmkwd"
 	sha512sum="$xbmkpwd/util/sbase/sha512sum"
@@ -171,7 +168,7 @@ xbmk_parent_set_env()
 	xbmk_parent_set_export
 	xbmk_set_version
 
-	remkdir "$xbtmp" "$xbtmp/gnupath" "$xbtmp/xbmkpath"
+	remkdir "$xbtmp" "$xbtmp/xbmkpath"
 
 	xbmk_set_pyver
 	xbmk_set_mirror
@@ -216,7 +213,7 @@ xbmk_parent_set_export()
 		err "cachedir '$XBMK_CACHE' is a file" \
 		    "xbmk_parent_set_export" "$@"
 
-	export PATH="$xbtmp/xbmkpath:$xbtmp/gnupath:$PATH"
+	export PATH="$xbtmp/xbmkpath:$PATH"
 	xbmkpath="$PATH"
 
 	# if "y": a coreboot target won't be built if target.cfg says release=n
@@ -391,5 +388,3 @@ xchild()
 
 	exit $xbmk_rval
 }
-
-xbmk_init "$@"

include/lib.sh

@@ -92,25 +92,6 @@ singletree()
 	    -name "target.cfg" ) || return 1; :
 }
 
-findpath()
-{
-	[ $# -lt 1 ] && \
-		err "findpath: No arguments provided" "findpath" "$@"
-
-	while [ $# -gt 0 ]
-	do
-		found="`readlink -f "$1" 2>/dev/null`" || return 1; :
-
-		if [ -z "$found" ]; then
-			found="`realpath "$1" 2>/dev/null`" || \
-			    return 1
-		fi
-
-		printf "%s\n" "$found"
-		shift 1
-	done
-}
-
 pad_one_byte()
 {
 	paddedfile="`mktemp || err "mktemp pad_one_byte"`" || \
@@ -181,16 +162,6 @@ dx_()
 	done < "$2" || err "cannot read '$2'" "dx_" "$@"; :
 }
 
-x_()
-{
-	[ $# -lt 1 ] && \
-		return 0
-	[ -z "$1" ] && \
-		err "Empty first arg" "x_" "$@"
-
-	"$@" || err "Unhandled error" "x_" "$@"
-}
-
 xchk()
 {
 	if [ $# -lt 3 ]; then
@@ -199,33 +170,3 @@ xchk()
 		err "arguments must not be empty" "xchk" "$@"
 	fi
 }
-
-err()
-{
-	if [ $# -eq 1 ]; then
-		printf "ERROR %s: %s\n" "$0" "$1" 1>&2 || :
-	elif [ $# -gt 1 ]; then
-		printf "ERROR %s: %s: in command with args: " "$0" "$1" 1>&2
-		shift 1
-		xprintf "$@" 1>&2
-	else
-		printf "ERROR, but no arguments provided to err\n" 1>&2
-	fi
-
-	exit 1
-}
-
-xprintf()
-{
-	xprintfargs=0
-	while [ $# -gt 0 ]; do
-		printf "\"%s\"" "$1"
-		[ $# -gt 1 ] && \
-			printf " "
-
-		xprintfargs=1
-		shift 1
-	done
-	[ $xprintfargs -gt 0 ] && \
-		printf "\n"; :
-}

mk

@@ -14,19 +14,38 @@ eval "`printf "LANG LANGUAGE LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE \
     LC_MEASUREMENT LC_IDENTIFICATION LC_ALL\n" | \
     awk '{ for (i=1; i<=NF; i++) $i = "export " $i "=C.UTF-8;"; print }'`"
 
+findpath()
+{
+	eval "$(printf '%s\n' "$@" | awk '{printf "readlink -f \"%s\" \
+	    2>/dev/null || realpath \"%s\" 2>/dev/null || return 1;",$0,$0}')"
+}
+
+x_()
+{
+	[ $# -lt 1 ] || "$@" || err "UNHANDLED ERROR" "x_" "$@"; :
+}
+
+err()
+{
+	printf '%s\n' "$@" | awk '{printf "\"%s\" ", $0}'
+	printf "ERROR!\n"
+
+	exit 1
+}
+
 (
 xbarg0="$0"
 [ "${xbarg0##*/}" = "$xbarg0" ] && \
     xbarg0="`command -v "$xbarg0"`"
 
-commandv="`readlink -f "$xbarg0" 2>/dev/null`"
-[ -z "$commandv" ] && \
-    commandv="`realpath "$xbarg0" 2>/dev/null`"
+xbmkpwd="$(x_ dirname "$(x_ findpath "$xbarg0")")" || exit 1
 
-cd "${commandv%/*}" || exit 1
+x_ cd "$xbmkpwd"
 
 . "include/lib.sh"
 . "include/env/init.sh"
+x_ xbmk_init "$@"
+
 . "include/env/get.sh"
 
 . "include/fw/vendor.sh"
@@ -53,9 +72,9 @@ if_not_dry_build=""
 
 eval "`newvar autoconfargs autogenargs badhash badtghash bootstrapargs \
     build_depend buildtype cleanargs cmakedir cmd defconfig dest_dir elfdir \
-    forcepull gccdir gccfull gccver gnatdir gnatfull gnatver listfile \
-    makeargs mdir mkhelper mkhelpercfg mode postmake premake project release \
-    rev srcdir target target_dir tree xarch xgcctree xlang`"
+    forcepull listfile makeargs mdir mkhelper mkhelpercfg mode postmake \
+    premake project release rev srcdir target target_dir tree xarch xgcctree \
+    xlang gitclean gitcleanargs`"
 
 main()
 {
@@ -249,7 +268,7 @@ configure_project()
 
 	eval "`newvar autoconfargs badhash badtghash bootstrapargs \
 	    build_depend buildtype cleanargs makeargs mkhelper postmake \
-	    premake release xarch xgcctree xlang`"
+	    premake release xarch xgcctree xlang gitclean gitcleanargs`"
 
 	[ ! -f "$_tcfg" ] && \
 		buildtype="auto"
@@ -433,100 +452,10 @@ check_cross_compiler()
 	[ -f "$xgccfile" ] && \
 		return 0 # build exists already, so skip building
 
-	check_gnu_path gcc gnat || x_ check_gnu_path gnat gcc
+	                           # it sometimes fails for like, no reason
 	make -C "$cbdir" $xgccargs || x_ make -C "$cbdir" $xgccargs
 
 	x_ touch "$xgccfile" # prevent unnecessary re-build operations
-	remkdir "$xbtmp/gnupath" # reset hostcc
-}
-
-# 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 '$1' unavailable" "check_gnu_path" "$@"
-
-	eval "`newvar gccdir gccfull gccver gnatdir gnatfull gnatver`"
-
-	if host_gcc_gnat_match "$@"; then
-		return 0
-	elif ! match_gcc_gnat_versions "$@"; then
-		return 1
-	fi
-}
-
-# check if gcc/gnat versions already match:
-
-host_gcc_gnat_match()
-{
-	gnu_setver "$1" "$1" || \
-		err "Command '$1' unavailable." "check_gnu_path" "$@"
-	gnu_setver "$2" "$2" || :
-
-	eval "[ -z \"\$$1ver\" ] && err \"Cannot detect host '$1' version\""
-
-	[ "$gnatfull" != "$gccfull" ] && \
-		return 1; : # mismatched gcc/gnat versions
-}
-
-# find all gcc/gnat versions, matching them up in PATH:
-
-match_gcc_gnat_versions()
-{
-	eval "$1dir=\"$(dirname "$(command -v "$1")")\""
-	eval "_gnudir=\"\$$1dir\""
-	eval "_gnuver=\"\$$1ver\""
-
-	for _bin in "$_gnudir/$2-"*; do
-		if [ "${_bin#"$_gnudir/$2-"}" = "$_gnuver" ] && [ -x "$_bin" ]
-		then
-			_gnuver="${_bin#"$_gnudir/$2-"}"
-			break
-		fi
-	done
-
-	gnu_setver "$2" "$_gnudir/$2-$_gnuver" || \
-		return 1
-	[ "$gnatfull" != "$gccfull" ] && \
-		return 1
-
-	( link_gcc_gnat_versions "$@" "$_gnudir" "$_gnuver" ) || \
-	    err "Can't link '$2-$_gnuver' '$_gnudir'" "check_gnu_path" "$@"; :
-}
-
-# create symlinks in PATH, so that the GCC/GNAT versions match:
-
-link_gcc_gnat_versions()
-{
-	_gnudir="$3"
-	_gnuver="$4"
-
-	remkdir "$xbtmp/gnupath"
-
-	x_ cd "$xbtmp/gnupath"
-
-	for _gnubin in "$_gnudir/$2"*"-$_gnuver"
-	do
-		_gnuutil="${_gnubin##*/}"
-		[ -e "$_gnubin" ] && \
-			x_ ln -s "$_gnubin" "${_gnuutil%"-$_gnuver"}"; :
-	done
-}
-
-# get the gcc/gnat version
-# fail: return 1 if util not found
-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()
@@ -574,10 +503,11 @@ handle_makefile()
 		$if_not_dry_build \
 			x_ cp "$srcdir/$_copy" "$defconfig"; :
 
-	[ -e "$srcdir/.git" ] && [ "$project" = "u-boot" ] && \
-	    [ "$mode" = "distclean" ] && \
-		$if_not_dry_build \
-			x_ git -C "$srcdir" $cleanargs clean -fdx; :
+	[ -e "$srcdir/.git" ] && [ "$gitclean" = "y" ] && \
+		if [ "$mode" = "distclean" ] || [ "$mode" = "clean" ]; then
+			$if_not_dry_build \
+				x_ git -C "$srcdir" clean $gitcleanargs; :
+		fi; :
 }
 
 run_make_command()