From c98330b2d1d9eff6086ab29c4876bc183dba48df Mon Sep 17 00:00:00 2001
From: Alexander Alekhin <alexander.alekhin@intel.com>
Date: Fri, 9 Dec 2016 20:03:05 +0300
Subject: [PATCH] cmake: special target to build/install docs only

---
 doc/CMakeLists.txt | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index 6825b5199f..f956cde4e8 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -171,4 +171,10 @@ if(BUILD_DOCS AND DOXYGEN_FOUND)
     DESTINATION "${OPENCV_DOC_INSTALL_PATH}"
     COMPONENT "docs" OPTIONAL
   )
+
+  # Alias to build/install docs only
+  add_custom_target(install_docs
+      DEPENDS doxygen
+      COMMAND "${CMAKE_COMMAND}" -DCMAKE_INSTALL_COMPONENT=docs -P "${CMAKE_BINARY_DIR}/cmake_install.cmake"
+  )
 endif()