put cachedir in environmental variable

XBMK_CACHE is now used, instead of hardcoding cache/

this is exported initialised to cache/, if unset.
this means you can set your own directory, and it means
./update release will use the same directory.

this means bandwidth wastage is further avoided.

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

build

@@ -100,7 +100,7 @@ build_release()
 	cd "$srcdir" || $err "$vdir: !cd \"$srcdir\""
 	./update trees -f
 	rmgit .
-	x_ rm -Rf cache tmp
+	x_ rm -Rf tmp
 	x_ mv src/docs docs
 	) || $err "can't create release files"
 

include/git.sh

@@ -37,7 +37,7 @@ fetch_project()
 
 clone_project()
 {
-	loc="cache/repo/$project" && singletree "$project" && \
+	loc="$XBMK_CACHE/repo/$project" && singletree "$project" && \
 	    loc="src/$project"
 
 	printf "Downloading project '%s' to '%s'\n" "$project" "$loc"
@@ -62,8 +62,9 @@ git_prep()
 	[ "$project" = "coreboot" ] && [ -n "$xtree" ] && [ $# -gt 2 ] && \
 	    [ "$xtree" != "$tree" ] && link_crossgcc "$_loc"
 
-	[ "$XBMK_RELEASE" = "y" ] && [ "$_loc" != "cache/repo/$project" ] \
-	    && rmgit "$tmpgit"
+	[ "$XBMK_RELEASE" = "y" ] && \
+	    [ "$_loc" != "$XBMK_CACHE/repo/$project" ] && \
+		rmgit "$tmpgit"
 
 	move_repo "$_loc"
 }
@@ -106,8 +107,8 @@ tmpclone()
 	repofail="n"
 
 	[ $# -lt 6 ] || rm -Rf "$3" || $err "git retry: !rm $3 ($1)"
-	repodir="cache/repo/${1##*/}" && [ $# -gt 5 ] && repodir="$3"
-	x_ mkdir -p "cache/repo"
+	repodir="$XBMK_CACHE/repo/${1##*/}" && [ $# -gt 5 ] && repodir="$3"
+	mkdir -p "$XBMK_CACHE/repo" || $err "!rmdir $XBMK_CACHE/repo"
 	if [ -d "$repodir" ] && [ $# -lt 6 ]; then
 		git -C "$repodir" pull || sleep 3 || git -C "$repodir" pull \
 		    || sleep 3 || git -C "$repodir" pull || :

include/lib.sh

@@ -88,6 +88,14 @@ if [ -z "${TMPDIR+x}" ]; then
 	xbmk_parent="y"
 fi
 
+# XBMK_CACHE is a directory, for caching downloads and git repositories
+[ -z "${XBMK_CACHE+x}" ] && export XBMK_CACHE="$PWD/cache"
+[ -z "$XBMK_CACHE" ] && export XBMK_CACHE="$PWD/cache"
+[ -L "$XBMK_CACHE" ] && [ "$XBMK_CACHE" = "$PWD/cache" ] && \
+    $err "cachedir is default, $PWD/cache, but it exists and is a symlink"
+[ -L "$XBMK_CACHE" ] && export XBMK_CACHE="$PWD/cache"
+[ -f "$XBMK_CACHE" ] && $err "cachedir '$XBMK_CACHE' exists but it's a file"
+
 # if "y": a coreboot target won't be built if target.cfg says release="n"
 # (this is used to exclude certain build targets from releases)
 [ -z "${XBMK_RELEASE+x}" ] && export XBMK_RELEASE="n"
@@ -180,14 +188,16 @@ singletree()
 
 download()
 {
-	cached="cache/file/$4"
+	cached="$XBMK_CACHE/file/$4"
 	dl_fail="n" # 1 url, 2 url backup, 3 destination, 4 checksum
 	vendor_checksum "$4" "$cached" 2>/dev/null && dl_fail="y"
 	[ "$dl_fail" = "n" ] && e "$3" f && return 0
-	x_ mkdir -p "${3%/*}" cache/file && for url in "$1" "$2"; do
+	mkdir -p "${3%/*}" "$XBMK_CACHE/file" || \
+	    $err "!mkdir '$3' '$XBMK_CACHE/file'"
+	for url in "$1" "$2"; do
 		[ "$dl_fail" = "n" ] && break
 		[ -z "$url" ] && continue
-		x_ rm -f "$cached"
+		rm -f "$cached" || $err "!rm -f '$cached'"
 		curl --location --retry 3 -A "$_ua" "$url" -o "$cached" || \
 		    wget --tries 3 -U "$_ua" "$url" -O "$cached" || continue
 		vendor_checksum "$4" "$cached" || dl_fail="n"

include/vendor.sh

@@ -8,7 +8,7 @@ me7updateparser="$PWD/util/me7_update_parser/me7_update_parser.py"
 pfs_extract="$PWD/src/biosutilities/Dell_PFS_Extract.py"
 uefiextract="$PWD/elf/uefitool/uefiextract"
 vendir="vendorfiles"
-appdir="cache/app"
+appdir="$XBMK_CACHE/app"
 cbcfgsdir="config/coreboot"
 
 eval `setvars "" EC_url_bkup EC_hash DL_hash DL_url_bkup MRC_refcode_gbe vcfg \
@@ -78,11 +78,12 @@ getfiles()
 fetch()
 {
 	dl_type="$1"; dl="$2"; dl_bkup="$3"; dlsum="$4"; _dest="${5##*../}"
-	[ "$5" = "/dev/null" ] && return 0; _dl="cache/file/$dlsum"
+	[ "$5" = "/dev/null" ] && return 0; _dl="$XBMK_CACHE/file/$dlsum"
 
 	download "$dl" "$dl_bkup" "$_dl" "$dlsum"
 
-	x_ rm -Rf "${_dl}_extracted"
+	rm -Rf "${_dl}_extracted" || \
+	    $err "!rm -Rf ${_ul}_extracted"
 	e "$_dest" f && return 0
 
 	mkdir -p "${_dest%/*}" || $err "mkdirs: !mkdir -p ${_dest%/*}"

script/trees

@@ -165,11 +165,11 @@ build_dependencies()
 
 check_project_hashes()
 {
-	x_ mkdir -p cache/hash
+	mkdir -p "$XBMK_CACHE/hash" || $err "!mkdir '$XBMK_CACHE/hash'"
 
 	old_pjhash=""
-	[ ! -f "cache/hash/$project$tree" ] || \
-	    read -r old_pjhash < "cache/hash/$project$tree"
+	[ ! -f "$XBMK_CACHE/hash/$project$tree" ] || \
+	    read -r old_pjhash < "$XBMK_CACHE/hash/$project$tree"
 
 	x_ rm -f "$TMPDIR/project.list" "$TMPDIR/project.hash" \
 	    "$TMPDIR/project.tmp"; x_ touch "$TMPDIR/project.tmp"
@@ -192,10 +192,10 @@ check_project_hashes()
 
 	pjhash="$(sha512sum "$TMPDIR/project.hash" | awk '{print $1}')" || :
 	badhash="y" && [ "$pjhash" = "$old_pjhash" ] && badhash="n"
-	[ -f "cache/hash/$project$tree" ] || badhash="y"
+	[ -f "$XBMK_CACHE/hash/$project$tree" ] || badhash="y"
 
-	printf "%s\n" "$pjhash" > "cache/hash/$project$tree" || \
-	    $err "!mk cache/hash/$project$tree"
+	printf "%s\n" "$pjhash" > "$XBMK_CACHE/hash/$project$tree" || \
+	    $err "!mk $XBMK_CACHE/hash/$project$tree"
 
 	[ "$badhash" = "n" ] || rm -Rf "src/$project/$tree" \
 	    "elf/$project/$tree" "elf/$project/$target" || \