Bail out if 'go build' fails

Author: HarryMichal

src/go-build-wrapper

@@ -27,7 +27,12 @@ if ! cd "$1"; then
     exit 1
 fi
 
-go build -trimpath -ldflags "-extldflags '-Wl,-rpath,/run/host/usr/lib -Wl,-rpath,/run/host/usr/lib64' -linkmode external -X github.com/containers/toolbox/pkg/version.currentVersion=$3" -o "$2/toolbox"
+go build -trimpath -ldflags "-extldflags '-Wl,-rpath,/run/host/usr/lib -Wl,-rpath,/run/host/usr/lib64'
+    -linkmode external -X github.com/containers/toolbox/pkg/version.currentVersion=$3" -o "$2/toolbox"
+if [ $? -ne 0 ]; then
+    echo "go-build-wrapper: failed to build toolbox"
+    exit 1
+fi
 
 if ! interpreter=$(patchelf --print-interpreter "$2/toolbox"); then
     echo "go-build-wrapper: failed to read PT_INTERP from $2/toolbox" >&2