abuild: fix so APKBUILD env var works properly

We also make sure we source the APKBUILD when we are in the directory
holding the APKBUILD file. Some of the packages sources others
with relative references. (for example kernel 3rd party packages)

Makefile

@@ -25,6 +25,7 @@ else
 FULL_VERSION    := $(VERSION)
 endif
 
+CHMOD		:= chmod
 SED		:= sed
 TAR		:= tar
 
@@ -39,9 +40,11 @@ SSL_LIBS	:= $(shell pkg-config --libs openssl)
 .SUFFIXES:	.sh.in .in
 .sh.in.sh:
 	${SED} ${SED_REPLACE} ${SED_EXTRA} $< > $@
+	${CHMOD} +x $@
 
 .in:
 	${SED} ${SED_REPLACE} ${SED_EXTRA} $< > $@
+	${CHMOD} +x $@
 
 P=$(PACKAGE)-$(VERSION)
 

abuild.in

@@ -14,16 +14,9 @@ apkcache=@apkcache@
 datadir=@datadir@
 
 program=${0##*/}
-startdir="$PWD"
+abuild_path=$(readlink -f $0)
-srcdir=${srcdir:-"$startdir/src"}
-pkgbasedir=${pkgbasedir:-"$startdir/pkg"}
-pkgrel=0
-repo=${startdir%/*}
-repo=${repo##*/}
 
 # defaults
-SRCDEST=${SRCDEST:-$startdir}
-PKGDEST=${PKGDEST:-$startdir}
 BUILD_BASE="build-base"
 SUDO=${SUDO:-"sudo"}
 
@@ -635,7 +628,8 @@ rootpkg() {
 	fi
 	cd "$startdir"
 	msg "Entering fakeroot..."
-	fakeroot $0 $do_build prepare_subpackages prepare_package create_apks
+	fakeroot "$abuild_path" $do_build prepare_subpackages prepare_package \
+		create_apks
 }
 
 srcpkg() {
@@ -1017,15 +1011,28 @@ while getopts "dfhi:kinp:P:qrRs:u" opt; do
 done
 shift $(( $OPTIND - 1 ))
 
+# find startdir
+[ -f "$APKBUILD" ] || die "Could not find $APKBUILD (PWD=$PWD)"
+APKBUILD=$(readlink -f "$APKBUILD")
+
+startdir="${APKBUILD%/*}"
+srcdir=${srcdir:-"$startdir/src"}
+pkgbasedir=${pkgbasedir:-"$startdir/pkg"}
+pkgrel=0
+repo=${startdir%/*}
+repo=${repo##*/}
+
+SRCDEST=${SRCDEST:-$startdir}
+PKGDEST=${PKGDEST:-$startdir}
+
+cd "$startdir" || die
+. "$APKBUILD"
+
 # If REPODEST is set then it will override the PKGDEST
 if [ -n "$REPODEST" ]; then
 	PKGDEST="$REPODEST/$repo"
 fi
 
-# source the buildfile
-[ -f "$APKBUILD" ] || die "Could not find $APKBUILD (PWD=$PWD)"
-. "$APKBUILD"
-
 # If we are handling a sub package then reset subpackages and install
 if [ -n "$subpkgname" ]; then
 	origsubpackages="$subpackages"