lib.sh: more unified config handling

replace it with logic that simply uses "." to load
files directly. for this, "vcfg" is added as a variable
in coreboot target.cfg files, referring to a directory
in config/vendor/ containing a file named pkg.cfg, and
this file then contains the same variables as the
erstwhile config/vendor/sources

config/git files are now directories, also containing
pkg.cfg files each with the same variables as before,
such as repository link and commit hash

this change results in a noticeable reduction in code
complexity within the build system.

unified reading of config files: new function setcfg()
added to lib.sh

setcfg checks if a config exists. if a 2nd argument is
passed, it is used as a return value for eval, otherwise
a string calling err is passed. setcfg output is passed
through eval, to set strings based on config; eval must
be used, so that the variables are set within the same
scope, otherwise they'd be set within setcfg which could
lead to some whacky results.

there's still a bit more more to do, but this single change
results in a substantial reduction in code complexity.

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

include/git.sh

@@ -31,10 +31,8 @@ fetch_config()
 
 load_target_config()
 {
-	[ -f "$cfgsdir/$1/target.cfg" ] || $err "$1: target.cfg missing"
 	[ -f "$cfgsdir/$1/seen" ] && $err "$_xm cfg: infinite loop in trees"
-
-	. "$cfgsdir/$1/target.cfg" || $err "load_target_config !$cfgsdir/$1"
+	eval `setcfg "$cfgsdir/$1/target.cfg"`
 	touch "$cfgsdir/$1/seen" || $err "load_config $cfgsdir/$1: !mk seen"
 }
 
@@ -50,9 +48,9 @@ prepare_new_tree()
 fetch_project_repo()
 {
 	eval "$(setvars "" xtree tree_depend)"
+	eval `setcfg "config/git/$project/pkg.cfg"`
 
-	scan_config "$project" "config/git"
-	chkvars loc url
+	chkvars url
 
 	[ -n "$xtree" ] && [ ! -d "src/coreboot/$xtree" ] && \
 		x_ ./update trees -f coreboot "$xtree"
@@ -63,14 +61,14 @@ fetch_project_repo()
 	clone_project
 
 	for x in config/git/*; do
-		[ -f "$x" ] && nuke "${x##*/}" "src/${x##*/}" 2>/dev/null
-	done
+		[ -d "$x" ] && nuke "${x##*/}" "src/${x##*/}" 2>/dev/null
+	done; return 0
 }
 
 clone_project()
 {
-	loc="${loc#src/}"
-	loc="src/$loc"
+	loc="src/$project"
+	singletree "$project" || loc="src/$project/$project"
 
 	printf "Downloading project '%s' to '%s'\n" "$project" "$loc"
 	e "$loc" d && return 0

include/lib.sh

@@ -60,9 +60,7 @@ read -r projectsite < projectsite || :
 install_packages()
 {
 	[ $# -lt 2 ] && badcmd "fewer than two arguments"
-	[ -f "config/dependencies/$2" ] || badcmd "unsupported target"
-
-	. "config/dependencies/$2" || $err "! . config/dependencies/$2"
+	eval `setcfg "config/dependencies/$2"`
 
 	$pkg_add $pkglist || $err "Cannot install packages"
 
@@ -127,25 +125,6 @@ done
 relname="$projectname-$version"
 export LOCALVERSION="-$projectname-${version%%-*}"
 
-scan_config()
-{
-	awkstr=" /\{.*$1.*}{/ {flag=1;next} /\}/{flag=0} flag { print }"
-	confdir="$2"
-	revfile="$(mktemp -t sources.XXXXXXXXXX)"
-	cat "$confdir/"* > "$revfile" || $err "$confdir: can't cat files"
-	while read -r line ; do
-		set $line 1>/dev/null 2>/dev/null || :
-		if [ "${1%:}" = "depend" ]; then
-			depend="$depend $2"
-		else
-			eval "${1%:}=\"$2\""
-		fi
-	done << EOF
-	$(eval "awk '$awkstr' \"$revfile\"")
-EOF
-	rm -f "$revfile" || $err "scan_config: Cannot remove tmpfile"
-}
-
 check_defconfig()
 {
 	[ -d "$1" ] || $err "Target '$1' not defined."
@@ -253,3 +232,14 @@ cbfs()
 	lzma="-c lzma" && [ $# -gt 3 ] && lzma="-t raw"
 	x_ "$cbfstool" "$1" $ccmd -f "$2" -n "$3" $lzma
 }
+
+setcfg()
+{
+	if [ $# -gt 1 ]; then
+		printf "e \"%s\" f missing && return %s;\n" "$1" "$2"
+	else
+		printf "e \"%s\" f missing && %s \"Missing config\";\n" "$1" \
+		    "$err"
+	fi
+	printf ". \"%s\" || %s \"Could not read config\";\n" "$1" "$err"
+}

include/vendor.sh

@@ -14,7 +14,7 @@ vendir="vendorfiles"
 appdir="$vendir/app"
 cbcfgsdir="config/coreboot"
 
-eval "$(setvars "" _b EC_url_bkup EC_hash DL_hash DL_url_bkup MRC_refcode_gbe \
+eval "$(setvars "" EC_url_bkup EC_hash DL_hash DL_url_bkup MRC_refcode_gbe \
     E6400_VGA_DL_hash E6400_VGA_DL_url E6400_VGA_DL_url_bkup E6400_VGA_offset \
     E6400_VGA_romname CONFIG_HAVE_MRC SCH5545EC_DL_url_bkup SCH5545EC_DL_hash \
     mecleaner kbc1126_ec_dump MRC_refcode_cbtree new_mac _dl SCH5545EC_DL_url \
@@ -24,29 +24,27 @@ eval "$(setvars "" _b EC_url_bkup EC_hash DL_hash DL_url_bkup MRC_refcode_gbe \
     CONFIG_VGA_BIOS_FILE CONFIG_VGA_BIOS_ID CONFIG_KBC1126_FW1 release DL_url \
     CONFIG_INCLUDE_SMSC_SCH5545_EC_FW CONFIG_SMSC_SCH5545_EC_FW_FILE nukemode \
     CONFIG_IFD_BIN_PATH CONFIG_MRC_FILE CONFIG_HAVE_REFCODE_BLOB cbfstoolref \
-    CONFIG_REFCODE_BLOB_FILE)"
+    CONFIG_REFCODE_BLOB_FILE vcfg)"
 
 vendor_download()
 {
 	export PATH="$PATH:/sbin"
 
 	[ $# -gt 0 ] || $err "No argument given"
-	board="$1"
-	_b="${board%%_*mb}" # shorthand (no duplication per rom size)
-	boarddir="$cbcfgsdir/$board" && getcfg && scan_config "$_b" \
-	    "config/vendor" && bootstrap && getfiles; return 0
+	board="$1"; boarddir="$cbcfgsdir/$board"
+	getcfg && bootstrap && getfiles; return 0
 }
 
 getcfg()
 {
-	[ -d "$boarddir" ] || $err "Target '$board' not defined."
+	eval `setcfg "$boarddir/target.cfg"`
+
+	[ -z "$vcfg" ] && printf "%s: vcfg unset\n" "$board" 1>&2 && return 1
+
 	check_defconfig "$boarddir" 1>"$tmpdir/vendorcfg.list" && return 1
 	while read -r cbcfgfile; do
-		set +u +e
-		. "$cbcfgfile" 2>/dev/null
-		set -u -e
+		set +u +e; . "$cbcfgfile" 2>/dev/null; set -u -e
 	done < "$tmpdir/vendorcfg.list"
-	. "$boarddir/target.cfg" 2>/dev/null
 
 	[ -z "$tree" ] && $err "getcfg $boarddir: tree undefined"
 	cbdir="src/coreboot/$tree"
@@ -58,9 +56,10 @@ getcfg()
 	for c in CONFIG_HAVE_MRC CONFIG_HAVE_ME_BIN CONFIG_KBC1126_FIRMWARE \
 	    CONFIG_VGA_BIOS_FILE CONFIG_INCLUDE_SMSC_SCH5545_EC_FW; do
 		eval "[ \"\${$c}\" = \"/dev/null\" ] && continue"
-		eval "[ -z \"\${$c}\" ] || return 0"
+		eval "[ -z \"\${$c}\" ] && continue"
+		eval `setcfg "config/vendor/$vcfg/pkg.cfg"`; return 0
 	done
-	printf "Vendor files not needed for: %s\n" "$board" 1>&2 && return 1
+	printf "Vendor files not needed for: %s\n" "$board" 1>&2; return 1
 }
 
 bootstrap()
@@ -274,10 +273,7 @@ check_board()
 	fi
 
 	boarddir="$cbcfgsdir/$board"
-	[ -d "$boarddir" ] || $err "check_board: board $board missing"
-	[ -f "$boarddir/target.cfg" ] || \
-		$err "check_board $board: target.cfg missing"
-	. "$boarddir/target.cfg" 2>/dev/null
+	eval `setcfg "$boarddir/target.cfg"`
 	[ -z "$tree" ] && $err "check_board $board: tree undefined"; return 0
 }