Various minor cleanups in the linux bionic scripts.

Test: env DIST_DIR=out/dist art/tools/dist_linux_bionic.sh -j80 \
        com.android.art.host com.android.support.apexer
Test: art/tools/build_linux_bionic_tests.sh -j80
Bug: 229123823
Change-Id: I2ba87b1ef0aff38c60e351f237b59496d5b3c554
diff --git a/tools/build_linux_bionic_tests.sh b/tools/build_linux_bionic_tests.sh
index 7379e9a..0791233 100755
--- a/tools/build_linux_bionic_tests.sh
+++ b/tools/build_linux_bionic_tests.sh
@@ -14,12 +14,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-
-if [[ -z $ANDROID_BUILD_TOP ]]; then
-  pushd .
-else
-  pushd $ANDROID_BUILD_TOP
-fi
+set -e
 
 if [ ! -d art ]; then
   echo "Script needs to be run at the root of the android tree"
@@ -33,10 +28,10 @@
   soong_args="$soong_args TARGET_BUILD_UNBUNDLED=true"
 fi
 
-source build/envsetup.sh >&/dev/null # for get_build_var
-
-out_dir=$(get_build_var OUT_DIR)
-host_out=$(get_build_var HOST_OUT)
+vars="$(build/soong/soong_ui.bash --dumpvars-mode --vars="OUT_DIR HOST_OUT")"
+# Assign to a variable and eval that, since bash ignores any error status from
+# the command substitution if it's directly on the eval line.
+eval $vars
 
 # TODO(b/31559095) Figure out a better way to do this.
 #
@@ -46,15 +41,12 @@
 # First build all the targets still in .mk files (also build normal glibc host
 # targets so we know what's needed to run the tests).
 build/soong/soong_ui.bash --make-mode $soong_args "$@" test-art-host-run-test-dependencies build-art-host-tests
-if [ $? != 0 ]; then
-  exit 1
-fi
 
 tmp_soong_var=$(mktemp --tmpdir soong.variables.bak.XXXXXX)
 
 echo "Saving soong.variables to " $tmp_soong_var
-cat $out_dir/soong/soong.variables > ${tmp_soong_var}
-python3 <<END - ${tmp_soong_var} ${out_dir}/soong/soong.variables
+cat $OUT_DIR/soong/soong.variables > ${tmp_soong_var}
+python3 <<END - ${tmp_soong_var} ${OUT_DIR}/soong/soong.variables
 import json
 import sys
 x = json.load(open(sys.argv[1]))
@@ -67,11 +59,11 @@
 json.dump(x, open(sys.argv[2], mode='w'))
 END
 if [ $? != 0 ]; then
-  mv $tmp_soong_var $out_dir/soong/soong.variables
+  mv $tmp_soong_var $OUT_DIR/soong/soong.variables
   exit 2
 fi
 
-soong_out=$out_dir/soong/host/linux_bionic-x86
+soong_out=$OUT_DIR/soong/host/linux_bionic-x86
 declare -a bionic_targets
 # These are the binaries actually used in tests. Since some of the files are
 # java targets or 32 bit we cannot just do the same find for the bin files.
@@ -89,16 +81,16 @@
   $soong_out/bin/hprof-conv
   $soong_out/bin/signal_dumper
   $soong_out/lib64/libclang_rt.ubsan_standalone-x86_64-android.so
-  $(find $host_out/apex/com.android.art.host.zipapex -type f | sed "s:$host_out:$soong_out:g")
-  $(find $host_out/lib64 -type f | sed "s:$host_out:$soong_out:g")
-  $(find $host_out/nativetest64 -type f | sed "s:$host_out:$soong_out:g"))
+  $(find $HOST_OUT/apex/com.android.art.host.zipapex -type f | sed "s:$HOST_OUT:$soong_out:g")
+  $(find $HOST_OUT/lib64 -type f | sed "s:$HOST_OUT:$soong_out:g")
+  $(find $HOST_OUT/nativetest64 -type f | sed "s:$HOST_OUT:$soong_out:g"))
 
 echo building ${bionic_targets[*]}
 
 build/soong/soong_ui.bash --make-mode --skip-config --soong-only $soong_args "$@" ${bionic_targets[*]}
 ret=$?
 
-mv $tmp_soong_var $out_dir/soong/soong.variables
+mv $tmp_soong_var $OUT_DIR/soong/soong.variables
 
 # Having built with host-bionic confuses soong somewhat by making it think the
 # linux_bionic targets are needed for art phony targets like
@@ -107,6 +99,4 @@
 # rebuild stuff so this should be fine.
 rm -f $OUT_DIR/*.ninja $OUT_DIR/soong/*.ninja
 
-popd
-
 exit $ret