add the script to build CEPCSW with Key4hep.

build-k4.sh

+#!/bin/bash
+##############################################################################
+# Setup script for CEPCSW:
+# - build the cepcsw
+#
+# Usage:
+# $ bash build.sh
+# or:
+# $ 
+#
+# Author: Tao Lin <lintao@ihep.ac.cn>
+##############################################################################
+
+function info:() {
+    echo "INFO: $*" 1>&2
+}
+
+function error:() {
+    echo "ERROR: $*" 1>&2
+}
+
+function check-cepcsw-envvar() {
+    source /cvmfs/sw.hsf.org/key4hep/setup.sh
+}
+
+function build-dir() {
+    local blddir=build
+
+    # If detect the extra env var, append it to the build dir
+    if [ -n "${k4_version}" ]; then
+        blddir=${blddir}.${k4_version}
+    fi
+    if [ -n "${k4_platform}" ]; then
+        blddir=${blddir}.${k4_platform}
+    fi
+
+    echo $blddir
+}
+
+function check-working-builddir() {
+    local blddir=$(build-dir)
+    if [ ! -d "$blddir" ]; then
+        mkdir $blddir || {
+            error: "Failed to create $blddir"
+            return 1
+        }
+    fi
+}
+
+function run-cmake() {
+    local blddir=$(build-dir)
+
+    if [ ! -d "$blddir" ]; then
+        error: "Failed to create $blddir"
+        return 1
+    fi
+
+    cd $blddir
+
+    local clhep_prefix=$(clhep-config --prefix)
+    local clhep_include=${clhep_prefix}/include
+
+    # locate the pandorapfa
+    local pandorapfa=$(echo $CMAKE_PREFIX_PATH | tr ':' '\n' | grep pandorapfa | head -n1)
+    info: "Find PandoraPFA: $pandorapfa"
+    if [ -z "$pandorapfa" ]; then
+        error: "Failed to find the PandoraPFA"
+        return 1
+    fi
+    
+    local pandorapfa_cmake_modules=${pandorapfa}/cmakemodules
+    info: "Find PandoraPFA cmake: ${pandorapfa_cmake_modules}"
+    if [ ! -d "${pandorapfa_cmake_modules}" ]; then
+        error: "Failed to find the cmake modules for PandoraPFA: ${pandorapfa_cmake_modules}"
+        return 1
+    fi
+
+    local cmake_modules=${pandorapfa_cmake_modules}
+
+    cmake .. -DHOST_BINARY_TAG=${k4_platform} \
+          -DCLHEP_INCLUDE_DIR=${clhep_include} \
+          -DCMAKE_MODULE_PATH=${cmake_modules} || {
+        error: "Failed to cmake"
+        return 1
+    }
+
+}
+
+function run-make() {
+    make
+}
+
+##############################################################################
+# Parse the command line options
+##############################################################################
+
+# The current default platform
+k4_platform=x86_64-linux-gcc9-opt
+k4_version=master
+
+check-cepcsw-envvar || exit -1
+
+check-working-builddir || exit -1
+
+run-cmake || exit -1
+
+run-make || exit -1