首先打印系统信息，该信息在eosio_build.sh中已经通过export设置到环境变量中，从上到下分别是：系统名称，系统版本，CPU内核数，内存，磁盘总空间以及磁盘可用空间。
echo "OS name: ${NAME}" echo "OS Version: ${VERSION_ID}" echo "CPU cores: ${CPU_CORES}" echo "Physical Memory: ${MEM_GIG}G" echo "Disk space total: ${DISK_TOTAL}G" echo "Disk space available: ${DISK_AVAIL}G"
接下来是系统配置要求：centos版本必须是7以上，内存必须不能小于7G，磁盘空间不能小于5G
( [[ $NAME == "CentOS Linux" ]] && [[ "$(echo ${VERSION} | sed 's/ .*//g')" < 7 ]] ) && echo " - You must be running Centos 7 or higher to install EOSIO." && exit 1 [[ $MEM_GIG -lt 7 ]] && echo "Your system must have 7 or more Gigabytes of physical memory installed." && exit 1 [[ "${DISK_AVAIL}" -lt "${DISK_MIN}" ]] && echo " - You must have at least ${DISK_MIN}GB of available storage to install EOSIO." && exit 1 echo ""
接下来是执行ensure-scl方法，该方法代码如下
1 function ensure-scl() { 2 echo "${COLOR_CYAN}[Ensuring installation of Centos Software Collections Repository]${COLOR_NC}" # Needed for rh-python36 3 SCL=$( rpm -qa | grep -E 'centos-release-scl-[0-9].*' || true ) 4 if [[ -z "${SCL}" ]]; then 5 while true; do 6 [[ $NONINTERACTIVE == false ]] && read -p "${COLOR_YELLOW}Do you wish to install and enable the Centos Software Collections Repository? (y/n)?${COLOR_NC} " PROCEED 7 echo "" 8 case $PROCEED in 9 "" ) echo "What would you like to do?";; 10 0 | true | [Yy]* ) install-package centos-release-scl "--enablerepo=extras"; break;; 11 1 | false | [Nn]* ) echo " - User aborted installation of required Centos Software Collections Repository."; exit 1;; 12 * ) echo "Please type 'y' for yes or 'n' for no.";; 13 esac 14 done 15 else 16 echo " - ${SCL} found." 17 fi 18 }
先看第3行，该行主要验证是否安装了centos-release-scl系统软件。如果安装则返回scl名称，否则返回空；
第4行对scl进行判断，如果没有安装，则提示安装，之后转到第10行，进行安装。
所以该方法是为了确保centos的scl文件必须存在。关于centos-release-scl作用，请查看如何在CentOS上启用软件集，这里简单介绍备忘
SCL（软件集合）可以让你在同一个操作系统上安装和使用多个版本的软件，而不会影响整个系统的安装包。
SCL的创建就是为了给RHEL / CentOS用户提供一种以方便，安全地安装和使用应用程序和运行时环境的多个（而且可能是更新的）版本的方式，同时避免把系统搞乱。
接下来执行ensure-devtoolset方法，改方法源代码如下：
function ensure-devtoolset() { echo "${COLOR_CYAN}[Ensuring installation of devtoolset-8]${COLOR_NC}" DEVTOOLSET=$( rpm -qa | grep -E 'devtoolset-8-[0-9].*' || true ) if [[ -z "${DEVTOOLSET}" ]]; then while true; do [[ $NONINTERACTIVE == false ]] && printf "${COLOR_YELLOW}Not Found: Do you wish to install it? (y/n)?${COLOR_NC}" && read -p " " PROCEED echo "" case $PROCEED in "" ) echo "What would you like to do?";; 0 | true | [Yy]* ) install-package devtoolset-8; break;; 1 | false | [Nn]* ) echo " - User aborted installation of devtoolset-8."; break;; * ) echo "Please type 'y' for yes or 'n' for no.";; esac done else echo " - ${DEVTOOLSET} found." fi }
其代码功能整体和ensure-scl几乎一样，只是替换为安装devtoolset-8工具集，有关devtoolset-8工具集功能，请参考：Developer Toolset 8，其主要功能是
为在CentOS或Red Hat Enterprise Linux平台上工作的开发人员设计的。它提供了最新版本的GNU编译器集合，GNU调试器以及其他开发，调试和性能监视工具。
接下来启用devtoolset-8工具集，源码如下
if [[ -d /opt/rh/devtoolset-8 ]]; then echo "${COLOR_CYAN}[Enabling Centos devtoolset-8 (so we can use GCC 8)]${COLOR_NC}" execute-always source /opt/rh/devtoolset-8/enable echo " - ${COLOR_GREEN}Centos devtoolset-8 successfully enabled!${COLOR_NC}" fi
接下来的方法比较复杂，源代码如下
# Ensure packages exist ensure-yum-packages "${REPO_ROOT}/scripts/eosio_build_centos7_deps"
这里有两个内容，其中ensure-yum-packages是验证依赖包是否存在，且将不存在的依赖包安装的过程，源码如下
function ensure-yum-packages() {
# 验证依赖包入参 ( [[ -z "${1}" ]] || [[ ! -f "${1}" ]] ) && echo "\$1 must be the location of your dependency file!" && exit 1 #定义临时包文件
DEPS_FILE="${TEMP_DIR}/$(basename ${1})" # Create temp file so we can add to it cat $1 > $DEPS_FILE
#安行读取所有的依赖包，设置进DEPS_FILE中 if [[ ! -z "${2}" ]]; then # Handle EXTRA_DEPS passed in and add them to temp DEPS_FILE printf "\n" >> $DEPS_FILE # Avoid needing a new line at the end of deps files OLDIFS="$IFS"; IFS=$'' _2=("$(echo $2 | sed 's/-qa /-qa\n/g')") for ((i = 0; i < ${#_2[@]}; i++)); do echo "${_2[$i]}\n" | sed 's/-qa\\n/-qa/g' >> $DEPS_FILE; done fi
# 跟新yum while true; do [[ $NONINTERACTIVE == false ]] && printf "${COLOR_YELLOW}Do you wish to update YUM repositories? (y/n)?${COLOR_NC}" && read -p " " PROCEED echo "" case $PROCEED in "" ) echo "What would you like to do?";; 0 | true | [Yy]* ) execute eval $( [[ $CURRENT_USER == "root" ]] || echo $SUDO_LOCATION -E ) $YUM -y update; break;; 1 | false | [Nn]* ) echo " - Proceeding without update!"; break;; * ) echo "Please type 'y' for yes or 'n' for no.";; esac done echo "${COLOR_CYAN}[Ensuring package dependencies]${COLOR_NC}" OLDIFS="$IFS"; IFS=$',' # || [[ -n "$testee" ]]; needed to see last line of deps file (https://stackoverflow.com/questions/12916352/shell-script-read-missing-last-line) while read -r testee tester || [[ -n "$testee" ]]; do if [[ ! -z $(eval $tester $testee) ]]; then echo " - ${testee} ${COLOR_GREEN}ok${COLOR_NC}" else DEPS=$DEPS"${testee} " echo " - ${testee} ${COLOR_RED}NOT${COLOR_NC} found!" (( COUNT+=1 )) fi done < $DEPS_FILE IFS=$OLDIFS OLDIFS="$IFS"; IFS=$' ' echo "" if [[ $COUNT > 0 ]]; then while true; do [[ $NONINTERACTIVE == false ]] && printf "${COLOR_YELLOW}Do you wish to install missing dependencies? (y/n)?${COLOR_NC}" && read -p " " PROCEED echo "" case $PROCEED in "" ) echo "What would you like to do?";; 0 | true | [Yy]* ) for DEP in $DEPS; do
#循环安装更新包 install-package $DEP done break;; 1 | false | [Nn]* ) echo " ${COLOR_RED}- User aborted installation of required dependencies.${COLOR_NC}"; exit;; * ) echo "Please type 'y' for yes or 'n' for no.";; esac done echo "" else echo "${COLOR_GREEN} - No required package dependencies to install.${COLOR_NC}" echo "" fi IFS=$OLDIFS }
其中必须安装的更新包在${REPO_ROOT}/scripts/eosio_build_centos7_deps中，内容如下：
git,rpm -qa autoconf,rpm -qa automake,rpm -qa libtool,rpm -qa make,rpm -qa bzip2,rpm -qa doxygen,rpm -qa graphviz,rpm -qa bzip2-devel,rpm -qa openssl-devel,rpm -qa gmp-devel,rpm -qa ocaml,rpm -qa libicu-devel,rpm -qa python,rpm -qa python-devel,rpm -qa rh-python36,rpm -qa gettext-devel,rpm -qa file,rpm -qa libusbx-devel,rpm -qa libcurl-devel,rpm -qa patch,rpm -qa
确认安装python3.6版本，rh-python36
export PYTHON3PATH="/opt/rh/rh-python36" if $DRYRUN || [ -d $PYTHON3PATH ]; then echo "${COLOR_CYAN}[Enabling python36]${COLOR_NC}" execute source $PYTHON3PATH/enable echo " ${COLOR_GREEN}- Python36 successfully enabled!${COLOR_NC}" echo "" fi
接下来安装基础软件
# Handle clang/compiler ensure-compiler # CMAKE Installation ensure-cmake # CLANG Installation build-clang # LLVM Installation ensure-llvm # BOOST Installation ensure-boost
ensure-compiler源码如下
1 function ensure-compiler() { 2 # Support build-essentials on ubuntu 3 if [[ $NAME == "CentOS Linux" ]] || [[ $VERSION_ID == "16.04" ]] || ( $PIN_COMPILER && [[ $VERSION_ID == "18.04" ]] ); then 4 export CXX=${CXX:-'g++'} 5 export CC=${CC:-'gcc'} 6 fi 7 export CXX=${CXX:-'clang++'} 8 export CC=${CC:-'clang'} 9 if $PIN_COMPILER || [[ -f $CLANG_ROOT/bin/clang++ ]]; then 10 export PIN_COMPILER=true 11 export BUILD_CLANG=true 12 export CPP_COMP=$CLANG_ROOT/bin/clang++ 13 export CC_COMP=$CLANG_ROOT/bin/clang 14 export PATH=$CLANG_ROOT/bin:$PATH 15 elif [[ $PIN_COMPILER == false ]]; then 16 which $CXX &>/dev/null || ( echo "${COLOR_RED}Unable to find $CXX compiler: Pass in the -P option if you wish for us to install it or install a C++17 compiler and set \$CXX and \$CC to the proper binary locations. ${COLOR_NC}"; exit 1 ) 17 # readlink on mac differs from linux readlink (mac doesn't have -f) 18 [[ $ARCH == "Linux" ]] && READLINK_COMMAND="readlink -f" || READLINK_COMMAND="readlink" 19 COMPILER_TYPE=$( eval $READLINK_COMMAND $(which $CXX) || true ) 20 if [[ $CXX =~ "clang" ]] || [[ $COMPILER_TYPE =~ "clang" ]]; then 21 if [[ $ARCH == "Darwin" ]]; then 22 ### Check for apple clang version 10 or higher 23 [[ $( $(which $CXX) --version | cut -d ' ' -f 4 | cut -d '.' -f 1 | head -n 1 ) -lt 10 ]] && export NO_CPP17=true 24 else 25 if [[ $( $(which $CXX) --version | cut -d ' ' -f 3 | head -n 1 | cut -d '.' -f1) =~ ^[0-9]+$ ]]; then # Check if the version message cut returns an integer 26 [[ $( $(which $CXX) --version | cut -d ' ' -f 3 | head -n 1 | cut -d '.' -f1) < 6 ]] && export NO_CPP17=true 27 elif [[ $(clang --version | cut -d ' ' -f 4 | head -n 1 | cut -d '.' -f1) =~ ^[0-9]+$ ]]; then # Check if the version message cut returns an integer 28 [[ $( $(which $CXX) --version | cut -d ' ' -f 4 | cut -d '.' -f 1 | head -n 1 ) < 6 ]] && export NO_CPP17=true 29 fi 30 fi 31 else 32 ## Check for c++ version 7 or higher 33 [[ $( $(which $CXX) -dumpversion | cut -d '.' -f 1 ) -lt 7 ]] && export NO_CPP17=true 34 if [[ $NO_CPP17 == false ]]; then # https://github.com/EOSIO/eos/issues/7402 35 while true; do 36 echo "${COLOR_YELLOW}WARNING: Your GCC compiler ($CXX) is less performant than clang (https://github.com/EOSIO/eos/issues/7402). We suggest running the build script with -P or install your own clang and try again.${COLOR_NC}" 37 [[ $NONINTERACTIVE == false ]] && printf "${COLOR_YELLOW}Do you wish to proceed anyway? (y/n)?${COLOR_NC}" && read -p " " PROCEED 38 case $PROCEED in 39 "" ) echo "What would you like to do?";; 40 0 | true | [Yy]* ) break;; 41 1 | false | [Nn]* ) exit 1;; 42 * ) echo "Please type 'y' for yes or 'n' for no.";; 43 esac 44 done 45 fi 46 fi 47 fi 48 if $NO_CPP17; then 49 while true; do 50 echo "${COLOR_YELLOW}Unable to find C++17 support in ${CXX}!${COLOR_NC}" 51 echo "If you already have a C++17 compiler installed or would like to install your own, export CXX to point to the compiler of your choosing." 52 [[ $NONINTERACTIVE == false ]] && printf "${COLOR_YELLOW}Do you wish to download and build C++17? (y/n)?${COLOR_NC}" && read -p " " PROCEED 53 case $PROCEED in 54 "" ) echo "What would you like to do?";; 55 0 | true | [Yy]* ) 56 export PIN_COMPILER=true 57 export BUILD_CLANG=true 58 export CPP_COMP=$CLANG_ROOT/bin/clang++ 59 export CC_COMP=$CLANG_ROOT/bin/clang 60 export PATH=$CLANG_ROOT/bin:$PATH 61 break;; 62 1 | false | [Nn]* ) echo "${COLOR_RED} - User aborted C++17 installation!${COLOR_NC}"; exit 1;; 63 * ) echo "Please type 'y' for yes or 'n' for no.";; 64 esac 65 done 66 fi 67 $BUILD_CLANG && export PINNED_TOOLCHAIN="-DCMAKE_TOOLCHAIN_FILE='${BUILD_DIR}/pinned_toolchain.cmake'" 68 echo "" 69 }
这个方法咋看下去确实很多，也很难分析，但其实核心内容就三个：
1. 确保clang安装，并且安装版本必须是10+
2.安装gcc在7版本以上
3.兼容c++17
然后是ensure-cmake，源码如下
function ensure-cmake() { echo "${COLOR_CYAN}[Ensuring CMAKE installation]${COLOR_NC}" if [[ ! -e "${CMAKE}" ]]; then execute bash -c "cd $SRC_DIR && \ curl -LO https://cmake.org/files/v${CMAKE_VERSION_MAJOR}.${CMAKE_VERSION_MINOR}/cmake-${CMAKE_VERSION}.tar.gz \ && tar -xzf cmake-${CMAKE_VERSION}.tar.gz \ && cd cmake-${CMAKE_VERSION} \ && ./bootstrap --prefix=${EOSIO_INSTALL_DIR} \ && make -j${JOBS} \ && make install \ && cd .. \ && rm -f cmake-${CMAKE_VERSION}.tar.gz" [[ -z "${CMAKE}" ]] && export CMAKE="${BIN_DIR}/cmake" echo " - CMAKE successfully installed @ ${CMAKE}" echo "" else echo " - CMAKE found @ ${CMAKE}." echo "" fi }
核心内容也只是安装符合要求的cmake，接下来的ensure-llvm、ensure-boost也几乎如此，这里把源码贴上
1 function ensure-boost() { 2 [[ $ARCH == "Darwin" ]] && export CPATH="$(python-config --includes | awk '{print $1}' | cut -dI -f2):$CPATH" # Boost has trouble finding pyconfig.h 3 echo "${COLOR_CYAN}[Ensuring Boost $( echo $BOOST_VERSION | sed 's/_/./g' ) library installation]${COLOR_NC}" 4 BOOSTVERSION=$( grep "#define BOOST_VERSION" "$BOOST_ROOT/include/boost/version.hpp" 2>/dev/null | tail -1 | tr -s ' ' | cut -d\ -f3 || true ) 5 if [[ "${BOOSTVERSION}" != "${BOOST_VERSION_MAJOR}0${BOOST_VERSION_MINOR}0${BOOST_VERSION_PATCH}" ]]; then 6 B2_FLAGS="-q -j${JOBS} --with-iostreams --with-date_time --with-filesystem --with-system --with-program_options --with-chrono --with-test install" 7 BOOTSTRAP_FLAGS="" 8 if [[ $ARCH == "Linux" ]] && $PIN_COMPILER; then 9 B2_FLAGS="toolset=clang cxxflags='-stdlib=libc++ -D__STRICT_ANSI__ -nostdinc++ -I${CLANG_ROOT}/include/c++/v1' linkflags='-stdlib=libc++' link=static threading=multi --with-iostreams --with-date_time --with-filesystem --with-system --with-program_options --with-chrono --with-test -q -j${JOBS} install" 10 BOOTSTRAP_FLAGS="--with-toolset=clang" 11 fi 12 execute bash -c "cd $SRC_DIR && \ 13 curl -LO https://dl.bintray.com/boostorg/release/$BOOST_VERSION_MAJOR.$BOOST_VERSION_MINOR.$BOOST_VERSION_PATCH/source/boost_$BOOST_VERSION.tar.bz2 \ 14 && tar -xjf boost_$BOOST_VERSION.tar.bz2 \ 15 && cd $BOOST_ROOT \ 16 && ./bootstrap.sh ${BOOTSTRAP_FLAGS} --prefix=$BOOST_ROOT \ 17 && ./b2 ${B2_FLAGS} \ 18 && cd .. \ 19 && rm -f boost_$BOOST_VERSION.tar.bz2 \ 20 && rm -rf $BOOST_LINK_LOCATION" 21 echo " - Boost library successfully installed @ ${BOOST_ROOT}" 22 echo "" 23 else 24 echo " - Boost library found with correct version @ ${BOOST_ROOT}" 25 echo "" 26 fi 27 } 28 29 function ensure-llvm() { 30 echo "${COLOR_CYAN}[Ensuring LLVM 4 support]${COLOR_NC}" 31 if [[ ! -d $LLVM_ROOT ]]; then 32 if [[ $ARCH == "Darwin" ]]; then # Handle brew installed llvm@4 33 execute ln -s /usr/local/opt/llvm@4 $LLVM_ROOT 34 echo " - LLVM successfully linked from /usr/local/opt/llvm@4 to ${LLVM_ROOT}" 35 else 36 if $PIN_COMPILER || $BUILD_CLANG; then 37 CMAKE_FLAGS="-DCMAKE_INSTALL_PREFIX='${LLVM_ROOT}' -DLLVM_TARGETS_TO_BUILD=host -DLLVM_BUILD_TOOLS=false -DLLVM_ENABLE_RTTI=1 -DCMAKE_BUILD_TYPE=Release -DCMAKE_TOOLCHAIN_FILE='${BUILD_DIR}/pinned_toolchain.cmake' .." 38 else 39 if [[ $NAME == "Ubuntu" ]]; then 40 execute ln -s /usr/lib/llvm-4.0 $LLVM_ROOT 41 echo " - LLVM successfully linked from /usr/lib/llvm-4.0 to ${LLVM_ROOT}" 42 return 0 43 fi 44 CMAKE_FLAGS="-G 'Unix Makefiles' -DCMAKE_INSTALL_PREFIX=${LLVM_ROOT} -DLLVM_TARGETS_TO_BUILD='host' -DLLVM_BUILD_TOOLS=false -DLLVM_ENABLE_RTTI=1 -DCMAKE_BUILD_TYPE=Release .." 45 fi 46 execute bash -c "cd ${OPT_DIR} \ 47 && git clone --depth 1 --single-branch --branch $LLVM_VERSION https://github.com/llvm-mirror/llvm.git llvm && cd llvm \ 48 && mkdir build \ 49 && cd build \ 50 && ${CMAKE} ${CMAKE_FLAGS} \ 51 && make -j${JOBS} \ 52 && make install" 53 echo " - LLVM successfully installed @ ${LLVM_ROOT}" 54 echo "" 55 fi 56 else 57 echo " - LLVM found @ ${LLVM_ROOT}." 58 echo "" 59 fi 60 }
然后看build-clang方法，源码如下：
function build-clang() { if $BUILD_CLANG; then echo "${COLOR_CYAN}[Ensuring Clang support]${COLOR_NC}" if [[ ! -d $CLANG_ROOT ]]; then execute bash -c "cd ${TEMP_DIR} \ && rm -rf clang8 \ && git clone --single-branch --branch $PINNED_COMPILER_BRANCH https://git.llvm.org/git/llvm.git clang8 \ && cd clang8 && git checkout $PINNED_COMPILER_LLVM_COMMIT \ && cd tools \ && git clone --single-branch --branch $PINNED_COMPILER_BRANCH https://git.llvm.org/git/lld.git \ && cd lld && git checkout $PINNED_COMPILER_LLD_COMMIT && cd ../ \ && git clone --single-branch --branch $PINNED_COMPILER_BRANCH https://git.llvm.org/git/polly.git \ && cd polly && git checkout $PINNED_COMPILER_POLLY_COMMIT && cd ../ \ && git clone --single-branch --branch $PINNED_COMPILER_BRANCH https://git.llvm.org/git/clang.git clang && cd clang \ && git checkout $PINNED_COMPILER_CLANG_COMMIT \ && patch -p2 < \"$REPO_ROOT/scripts/clang-devtoolset8-support.patch\" \ && cd tools && mkdir extra && cd extra \ && git clone --single-branch --branch $PINNED_COMPILER_BRANCH https://git.llvm.org/git/clang-tools-extra.git \ && cd clang-tools-extra && git checkout $PINNED_COMPILER_CLANG_TOOLS_EXTRA_COMMIT && cd .. \ && cd ../../../../projects \ && git clone --single-branch --branch $PINNED_COMPILER_BRANCH https://git.llvm.org/git/libcxx.git \ && cd libcxx && git checkout $PINNED_COMPILER_LIBCXX_COMMIT && cd ../ \ && git clone --single-branch --branch $PINNED_COMPILER_BRANCH https://git.llvm.org/git/libcxxabi.git \ && cd libcxxabi && git checkout $PINNED_COMPILER_LIBCXXABI_COMMIT && cd ../ \ && git clone --single-branch --branch $PINNED_COMPILER_BRANCH https://git.llvm.org/git/libunwind.git \ && cd libunwind && git checkout $PINNED_COMPILER_LIBUNWIND_COMMIT && cd ../ \ && git clone --single-branch --branch $PINNED_COMPILER_BRANCH https://git.llvm.org/git/compiler-rt.git \ && cd compiler-rt && git checkout $PINNED_COMPILER_COMPILER_RT_COMMIT && cd ../ \ && cd ${TEMP_DIR}/clang8 \ && mkdir build && cd build \ && ${CMAKE} -G 'Unix Makefiles' -DCMAKE_INSTALL_PREFIX='${CLANG_ROOT}' -DLLVM_BUILD_EXTERNAL_COMPILER_RT=ON -DLLVM_BUILD_LLVM_DYLIB=ON -DLLVM_ENABLE_LIBCXX=ON -DLLVM_ENABLE_RTTI=ON -DLLVM_INCLUDE_DOCS=OFF -DLLVM_OPTIMIZED_TABLEGEN=ON -DLLVM_TARGETS_TO_BUILD=all -DCMAKE_BUILD_TYPE=Release .. \ && make -j${JOBS} \ && make install \ && rm -rf ${TEMP_DIR}/clang8" echo " - Clang 8 successfully installed @ ${CLANG_ROOT}" echo "" else echo " - Clang 8 found @ ${CLANG_ROOT}" echo "" fi export CXX=$CPP_COMP export CC=$CC_COMP fi }
这里是对所有的安装依赖包进行make安装。
从上述代码可以知道，eos依赖的LLVM已经在这里被安装好了
然后是mongo DB的安装，源码如下：
if $INSTALL_MONGO; then echo "${COLOR_CYAN}[Ensuring MongoDB installation]${COLOR_NC}" if [[ ! -d $MONGODB_ROOT ]]; then execute bash -c "cd $SRC_DIR && \ curl -OL https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-amazon-$MONGODB_VERSION.tgz \ && tar -xzf mongodb-linux-x86_64-amazon-$MONGODB_VERSION.tgz \ && mv $SRC_DIR/mongodb-linux-x86_64-amazon-$MONGODB_VERSION $MONGODB_ROOT \ && touch $MONGODB_LOG_DIR/mongod.log \ && rm -f mongodb-linux-x86_64-amazon-$MONGODB_VERSION.tgz \ && cp -f $REPO_ROOT/scripts/mongod.conf $MONGODB_CONF \ && mkdir -p $MONGODB_DATA_DIR \ && rm -rf $MONGODB_LINK_DIR \ && rm -rf $BIN_DIR/mongod \ && ln -s $MONGODB_ROOT $MONGODB_LINK_DIR \ && ln -s $MONGODB_LINK_DIR/bin/mongod $BIN_DIR/mongod" echo " - MongoDB successfully installed @ ${MONGODB_ROOT}." else echo " - MongoDB found with correct version @ ${MONGODB_ROOT}." fi echo "${COLOR_CYAN}[Ensuring MongoDB C driver installation]${COLOR_NC}" if [[ ! -d $MONGO_C_DRIVER_ROOT ]]; then execute bash -c "cd $SRC_DIR && \ curl -LO https://github.com/mongodb/mongo-c-driver/releases/download/$MONGO_C_DRIVER_VERSION/mongo-c-driver-$MONGO_C_DRIVER_VERSION.tar.gz \ && tar -xzf mongo-c-driver-$MONGO_C_DRIVER_VERSION.tar.gz \ && cd mongo-c-driver-$MONGO_C_DRIVER_VERSION \ && mkdir -p cmake-build \ && cd cmake-build \ && $CMAKE -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=$EOSIO_INSTALL_DIR -DENABLE_BSON=ON -DENABLE_SSL=OPENSSL -DENABLE_AUTOMATIC_INIT_AND_CLEANUP=OFF -DENABLE_STATIC=ON -DENABLE_ICU=OFF -DENABLE_SNAPPY=OFF $PINNED_TOOLCHAIN .. \ && make -j${JOBS} \ && make install \ && cd ../.. \ && rm mongo-c-driver-$MONGO_C_DRIVER_VERSION.tar.gz" echo " - MongoDB C driver successfully installed @ ${MONGO_C_DRIVER_ROOT}." else echo " - MongoDB C driver found with correct version @ ${MONGO_C_DRIVER_ROOT}." fi echo "${COLOR_CYAN}[Ensuring MongoDB CXX driver installation]${COLOR_NC}" if [[ ! -d $MONGO_CXX_DRIVER_ROOT ]]; then execute bash -c "cd $SRC_DIR && \ curl -L https://github.com/mongodb/mongo-cxx-driver/archive/r$MONGO_CXX_DRIVER_VERSION.tar.gz -o mongo-cxx-driver-r$MONGO_CXX_DRIVER_VERSION.tar.gz \ && tar -xzf mongo-cxx-driver-r${MONGO_CXX_DRIVER_VERSION}.tar.gz \ && cd mongo-cxx-driver-r$MONGO_CXX_DRIVER_VERSION \ && sed -i 's/\"maxAwaitTimeMS\", count/\"maxAwaitTimeMS\", static_cast(count)/ ' src/mongocxx/options/change_stream.cpp \ && sed -i 's/add_subdirectory(test)//' src/mongocxx/CMakeLists.txt src/bsoncxx/CMakeLists.txt \ && cd build \ && $CMAKE -DBUILD_SHARED_LIBS=OFF -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=$EOSIO_INSTALL_DIR -DCMAKE_PREFIX_PATH=$EOSIO_INSTALL_DIR $PINNED_TOOLCHAIN .. \ && make -j${JOBS} VERBOSE=1 \ && make install \ && cd ../.. \ && rm -f mongo-cxx-driver-r$MONGO_CXX_DRIVER_VERSION.tar.gz" echo " - MongoDB C++ driver successfully installed @ ${MONGO_CXX_DRIVER_ROOT}." else echo " - MongoDB C++ driver found with correct version @ ${MONGO_CXX_DRIVER_ROOT}." fi fi
这里就不进行详细分析了。整个基于centos7 eos的build过程就已经完成了其他系统的build脚本也大致如此，在此不进行特定分析，接下来是eosio_install.sh的执行过程。