From 3755099bd469a71317f5fff4f7655733dc207555 Mon Sep 17 00:00:00 2001
From: Adam Gyarmati <40522904+gyadam@users.noreply.github.com>
Date: Fri, 8 Nov 2019 19:05:46 -0800
Subject: [PATCH] Fix Windows installation script error

Fix an error during Windows installation caused by trying to create the already existing Build directory. Also excluding intermediate steps for Install directory creation.
---
 .../windows_install/windows_install.markdown             | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/doc/tutorials/introduction/windows_install/windows_install.markdown b/doc/tutorials/introduction/windows_install/windows_install.markdown
index c8f46cbdce..7a506b042a 100644
--- a/doc/tutorials/introduction/windows_install/windows_install.markdown
+++ b/doc/tutorials/introduction/windows_install/windows_install.markdown
@@ -48,10 +48,8 @@ CMAKE_CONFIG_GENERATOR="Visual Studio 14 2015 Win64"
 if [  ! -d "$myRepo/opencv"  ]; then
     echo "cloning opencv"
     git clone https://github.com/opencv/opencv.git
-    mkdir Build
-    mkdir Build/opencv
-    mkdir Install
-    mkdir Install/opencv
+    mkdir -p Build/opencv
+    mkdir -p Install/opencv
 else
     cd opencv
     git pull --rebase
@@ -60,8 +58,7 @@ fi
 if [  ! -d "$myRepo/opencv_contrib"  ]; then
     echo "cloning opencv_contrib"
     git clone https://github.com/opencv/opencv_contrib.git
-    mkdir Build
-    mkdir Build/opencv_contrib
+    mkdir -p Build/opencv_contrib
 else
     cd opencv_contrib
     git pull --rebase