improve install script

diff --git a/script/install_opencv.sh b/script/install_opencv.sh
index 757b33c..3017afa 100755 (executable)
--- a/script/install_opencv.sh
+++ b/script/install_opencv.sh
@@ -1,7 +1,9 @@
 #!/bin/bash -xe
 
 echo "Download and build opencv from source"
-cd $(mktemp -d)
+tmpdir = $(mktemp -d)
+
+cd tmpdir
 wget https://github.com/opencv/opencv/archive/3.4.1.tar.gz || exit 1
 
 echo "Build"
@@ -17,3 +19,8 @@ sudo make install || exit 1
 echo "Install opencv to /usr/local/ Done"
 
 sudo ldconfig
+
+rm -rf tmpdir || exit 1
+
+echo "Done"
+