########## Windows using vcpkg #############################################################################
# gRPC should be built once and only updated when there is a specific requirement to do so
# So Step 1-4 are rarely done.
# While Step 5 is instructions for configuring the nightly-build of ResInsight
# Step 5 is not fully described and assumes knowledge of how to build ResInsight normally. See README.md
############################################################################################################
1. Clone VCPKG
git clone https://github.com/microsoft/vcpkg.git
2. Install VCPKG from within vcpkg folder:
.\boostrap-vcpkg.bat
3. Install GRPC
.\vcpkg install grpc --triplet x64-windows

4. Python
* Install Python 3
* Execute the following using Python3
  python -m pip install grpcio-tools
* Make sure the python executable is found by setting -DRESINSIGHT_GRPC_PYTHON_EXECUTABLE=LOCATION_OF_PYTHON.EXE
   
5. Run cmake with the following statements: 
-DRESINSIGHT_ENABLE_GRPC=true
-DRESINSIGHT_GRPC_PYTHON_EXECUTABLE=LOCATION_OF_PYTHON.EXE
-DCMAKE_TOOLCHAIN_FILE=LOCATION_OF_VCPKG/scripts/buildsystems/vcpkg.cmake
NOTE: When using the CMake gui, you need to select "Specify toolchain for cross-compiling" 
      and enter the "LOCATION_OF_VCPKG/scripts/buildsystems/vcpkg.cmake" there. 
	  This path ends up in the CMAKE_TOOLCHAIN_FILE variable. If you do not, protobuffers are not found.
-A x64

############ Linux as STANDALONE GPRC ####################################################################
# gRPC should be built once and only updated when there is a specific requirement to do so
# So Step 1-5 are rarely done.
# While Step 6 is instructions for configuring the nightly-build of ResInsight
# Step 6 is not fully described and assumes knowledge of how to build ResInsight normally. See README.md
##########################################################################################################

#########################################################################################################
# 1. install autotools, autoconf and libtool with your distributions package manager.
#
# On Centos 6 you will need a newer Python and newer version of GCC than the standard version
# ResInsight AND gRPC will build with devtoolset-3+ but apparently devtoolset-3 is now gone
# So you will need to install devtoolset-6, devtoolset-7 or devtoolset-8.
# It makes sense to install devtoolset-6* (with asterix) to get all the necessary devtoolset packages
# You will also need a version of Python 3.5
#    
##########################################################################################################

sudo yum install autotools autoconf libtool devtoolset-6* rh-python35

###################################################################
# 2. Enable compiler and Python on Centos 6 (on other distributions, this may be different)   
###################################################################

scl enable devtoolset-6 rh-python35 bash

################################################################################################################
# 3. Run grpc install script and install to a user-writable directory. I.e, from within the ResInsight folder:
# Most of this runs fine without root. But unfortunately grpc currently fails to install the C++ library without root.
# So the script is required to be run as root even if the provided folders are writeable by the user
#
# WARNING: As of grpc 1.21.1 a long install directory may cause you to trigger a gRPC bug.
# The installation directory is the second argument (/opt/grpc in the example, which isn't too long).
#
# Bug: https://github.com/grpc/grpc/issues/14844
# A workaround patch is available in the issue, but the easiest thing to do is to ensure a short install path
################################################################################################################

sudo ./build-grpc-linux.sh /tmp/grpc /opt/grpc

##############################################################################
# Python GRPC module, OPTION 1
# 5a. Install grpcio-tools for Python as root user. If you cannot install python packages as root user, see 4b.
# NOTE: IF THIS FAILS WITH AN ERROR MESSAGE FROM PIP ABOUT 
#       "YOU SHOULD CONSIDER UPGRADING VIA 'python -m pip install --upgrade pip'"
#       Then performing this should fix the problem.
#       It IS possible to upgrade pip as a regular user: python -m pip install --user --upgrade pip
##############################################################################

sudo python -m pip install grpcio-tools

##############################################################################
# Python GRPC module, OPTION 2
# 5b. Install grpcio-tools for Python as regular user. 
# NOTE: IF THIS FAILS WITH AN ERROR MESSAGE FROM PIP ABOUT 
#       "YOU SHOULD CONSIDER UPGRADING VIA 'python -m pip install --upgrade pip'"
#       Then performing this should fix the problem.
##############################################################################

python -m pip install --user grpcio-tools

#################################################################################
# 6. Building ResInsight with GRPC enabled:
# Run cmake making sure of the following:
#    * RESINSIGHT_ENABLE_GRPC = true
#    * RESINSIGHT_GRPC_INSTALL_PREFIX is set to the Grpc install folder
#    * RESINSIGHT_GRPC_PYTHON_EXECUTABLE set to a good python 3
################################
See regular build instructions for the rest