macos script to build using cmake

.github/workflows/MacOS.yml

@@ -25,6 +25,9 @@ jobs:
       shell: bash
       run: |
         echo  ::set-output name=date::"$(cat ML_VERSION)"
+    - name: Configure and Build
+      run: |
+        sh install/macos/macos_build.sh
     
     
   macos_build_qmake:

install/linux/linux_build.sh

@@ -8,7 +8,7 @@
 # 
 # You can give as argument the BUILD_PATH and the INSTALL_PATH in the 
 # following way:
-# sh linux_build --build_path=/path/to/build --install_path=/path/to/install
+# sh linux_build.sh --build_path=/path/to/build --install_path=/path/to/install
 # -b and -i arguments are also supported.
 
 #default paths wrt the script folder

install/macos/macos_build.sh

@@ -0,0 +1,66 @@
+#!/bin/bash
+# this is a script shell for compiling meshlab in a MacOS environment.
+# Requires a Qt environment which is set-up properly, and an accessible
+# cmake binary.
+#
+# Without given arguments, MeshLab will be built in the meshlab/src/build
+# directory, and installed in $BUILD_PATH/../install.
+#
+# You can give as argument the BUILD_PATH and the INSTALL_PATH in the
+# following way:
+# sh macos_build.sh --build_path=/path/to/build --install_path=/path/to/install
+# -b and -i arguments are also supported.
+
+#realpath function
+realpath() {
+    [[ $1 = /* ]] && echo "$1" || echo "$PWD/${1#./}"
+}
+
+#default paths wrt the script folder
+SCRIPTS_PATH=$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )
+BUILD_PATH=$SCRIPTS_PATH/../../src/build
+INSTALL_PATH=$SCRIPTS_PATH/../../src/install
+
+#check parameters
+for i in "$@"
+do
+case $i in
+    -b=*|--build_path=*)
+    BUILD_PATH="${i#*=}"
+    shift # past argument=value
+    ;;
+    -i=*|--install_path=*)
+    INSTALL_PATH="${i#*=}"/usr/
+    shift # past argument=value
+    ;;
+    *)
+          # unknown option
+    ;;
+esac
+done
+
+#create build path if necessary
+if ! [ -d $BUILD_PATH ]
+then
+    mkdir -p $BUILD_PATH
+fi
+
+#create install path if necessary
+if ! [ -d $INSTALL_PATH ]
+then
+    mkdir -p $INSTALL_PATH
+fi
+
+BUILD_PATH=$(realpath $BUILD_PATH)
+INSTALL_PATH=$(realpath $INSTALL_PATH)
+
+#move to script directory
+cd $SCRIPTS_PATH
+
+#source path wrt script path
+SOURCE_PATH=$PWD/../../src
+
+cd $BUILD_PATH
+cmake -DCMAKE_INSTALL_PREFIX=$INSTALL_PATH $SOURCE_PATH
+make -j4
+#make install