Skip full install if only kernel header install needed

Signed-off-by: Joel Fernandes (Google) <[email protected]>

README.md

@@ -85,7 +85,7 @@ androdeb prepare --download --kernelsrc /path/to/kernel-source
 
 If you need to put kernel sources for an existing install, run:
 ```
-androdeb prepare --kernelsrc /path/to/kernel-source
+androdeb prepare --kernelsrc /path/to/kernel-source --skip-install
 ```
 Note: The kernel sources should have been built (atleast build should have started).
 

androdeb

@@ -42,6 +42,7 @@ case $key in
     --download) DOWNLOAD=1; shift || true; ;;
     --bcc) source $spath/packages/bcc; shift || true;     ;;
     --kernelsrc) KERNELSRC="$2"; shift || true;     shift || true;     ;;
+    --skip-install) SKIP_INSTALL=1; shift || true; ;;
     --kernel-headers-targz) KERNELHDRS=$2; shift || true;	shift || true;	;;
     --tempdir) TDIR="$2"; shift || true;     shift || true;     ;;
     --buildtar) TARDIR="$2"; shift || true;     shift || true;     ;;
@@ -158,7 +159,8 @@ if [ ! -z "$KERNELHDRS" ]; then
 	echo "Building updating kernel headers from supplied tar.gz ($KERNELHDRS)"
 
 	# Is header tar gz update the only thing left to do?
-	if [[ -z "$PACKAGES" ]] && [[ -z "$TARF" ]] && [[ -z "$BUILD_IMAGE" ]] && [[ -z "$KERNELSRC" ]] ; then
+	if [[ ! -z "$SKIP_INSTALL" ]]; then
+		echo "Skipping install"
 		push_unpack_tarred_headers $KERNELHDRS; do_cleanup; all_done_banner; exit 0; fi
 
 	tar -xvf $KERNELHDRS -C $OUT_TMP/ > /dev/null
@@ -170,7 +172,8 @@ if [ ! -z "$KERNELSRC" ]; then
 	$spath/bcc/build-kheaders-targz.sh ${KERNELSRC} $TDIR_ABS/kh.tgz > /dev/null
 
 	# Is header update the only thing left to do?
-	if [[ -z "$PACKAGES" ]] && [[ -z "$BUILD_IMAGE" ]] && [[ -z "$TARF" ]]; then
+	if [[ ! -z "$SKIP_INSTALL" ]]; then
+		echo "Skipping install"
 		push_unpack_headers; do_cleanup; all_done_banner; exit 0; fi
 
 	mkdir $OUT_TMP/kernel-headers

utils/banners

@@ -25,7 +25,7 @@ usage() {
 	echo ""
 	echo "	--bcc		Build and install BCC from source"
 	echo "	--kernelsrc	Extract kernel headers for BCC from here"
-	echo "	                (use if BCC couldn't find headers on device)"
+	echo "	--skip-install	Pass this along if only header install is needed"
 	echo ""
 	echo "	--tempdir	Use a specific temporary directory for build operation"
 	echo "	--buildtar	Local directory to store tarball of androdeb env from device"