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#!/bin/bash
#
# This script installs latest CMake on Linux machine
#
export PATH=/usr/local/bin:$PATH
# Min required CMake version
export CMAKE_MIN_VERSION=${1:-3.1.0}
# Target version to install if min required is not found
export CMAKE_VERSION=${2:-3.18.4}
UPGRADE_NEEDED=no
function splitVersion {
pattern='([^0-9]*\([0-9]*\)[.]\([0-9]*\)[.]'
v1=$(cut -d '.' -f 1 <<< $ver )
v2=$(cut -d '.' -f 2 <<< $ver )
v3=$(cut -d '.' -f 3 <<< $ver )
}
function checkVersion {
# Current CMake version
currVer=`cmake --version | grep version | cut -d' ' -f 3`
ver=$currVer splitVersion
cv1=$v1
cv2=$v2
cv3=$v3
cv=`echo "65536*$v1+256*$v2+$v3" | bc`
# New CMake version
ver=$CMAKE_MIN_VERSION splitVersion
nv=`echo "65536*$v1+256*$v2+$v3" | bc`
if [ "$cv" -ge "$nv" ]; then
echo "CMake is already installed: $currVer"
else
UPGRADE_NEEDED=yes
fi
}
checkVersion
if [[ "$UPGRADE_NEEDED" == "no" ]]; then
echo "Skipping CMake installation"
exit 0
fi
# Download cmake to /tmp
pushd /tmp
if [[ ! -f "/tmp/cmake.tar.gz" ]]; then
wget -O /tmp/cmake.tar.gz https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}.tar.gz
tar -zxvf /tmp/cmake.tar.gz
fi
# Bootstrap CMake
cd cmake-${CMAKE_VERSION}
./bootstrap --prefix=/usr/local
# Build CMake without CMake and without Ninja (slow)
make
make install
popd
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