[install] Update install script to pre-3.2 release status

scripts/install.opts

-GXX_RELEASE_WARNING_OPTS=" \
-    -Wall \
-    -Wno-deprecated \
-    -Wno-deprecated-declarations \
-    -Wno-sign-compare"
-
-GXX_RELEASE_OPTS=" \
-    -fno-strict-aliasing \
-    -fstrict-overflow \
-    -fno-finite-math-only \
-    -O3 \
-    -march=native \
-    -funroll-loops \
-    -g0"
-
-CMAKE_FLAGS="
--DCMAKE_C_COMPILER=/usr/bin/gcc
--DCMAKE_CXX_COMPILER=/usr/bin/g++
--DCMAKE_CXX_FLAGS_RELEASE='$GXX_RELEASE_OPTS $GXX_RELEASE_WARNING_OPTS'
--DCMAKE_CXX_FLAGS_DEBUG='-O0 -ggdb -Wall'
--DCMAKE_BUILD_TYPE=Release
-"

scripts/install.sh

 # One click install script dumux
-DUNE_VERSION=2.6
+echo " "
+echo " "
+echo "*********************************************************************************************"
+echo "(0/4) Checking all prerequistes. (git cmake gcc g++ wget pkg-config gnuplot umfpack)"
+echo "*********************************************************************************************"
 
 # check some prerequistes
 for PRGRM in git cmake gcc g++ wget paraview pkg-config gnuplot; do
@@ -18,25 +22,34 @@ for LIBRARY in libumfpack; do
 done
 
 currentver="$(gcc -dumpversion)"
-requiredver="4.9.0"
+requiredver="7"
 if [ "$(printf '%s\n' "$requiredver" "$currentver" | sort -V | head -n1)" != "$requiredver" ]; then
     echo "gcc greater than or equal to $requiredver is required!" >&2
     exit 1
 fi
 
+if [ $? -ne 0 ]; then
+    echo "*********************************************************************************************"
+    echo "(0/4) An error occured while checking for prerequistes."
+    echo "*********************************************************************************************"
+    exit $?
+else
+    echo "*********************************************************************************************"
+    echo "(1/4) All prerequistes found."
+    echo "*********************************************************************************************"
+fi
+
+echo " "
+
+echo "**************************************************************************************************************"
+echo "(1/4) Downloading supplementary files (test script & cmake.opts). Make sure to be connected to the internet."
+echo "**************************************************************************************************************"
+
 # make a new folder containing everything
 mkdir $(pwd)/dumux
 cd dumux
 
-echo "*********************************************************************************************"
-echo "Sucessfully created a folder dumux."
-echo "*********************************************************************************************"
-
-echo "*********************************************************************************************"
-echo "(0/2) Downloading supplementary files. Make sure to be connected to the internet."
-echo "*********************************************************************************************"
-
-# download the test script and the install.opts
+# download the test script and the cmake.opts
 if [ ! -f "test_dumux.sh" ]; then
     wget https://git.iws.uni-stuttgart.de/dumux-repositories/dumux-course/raw/master/scripts/test_dumux.sh
 fi
@@ -46,19 +59,31 @@ if [ ! -f "cmake.opts" ]; then
     wget https://git.iws.uni-stuttgart.de/dumux-repositories/dumux-course/raw/master/cmake.opts
 fi
 
+if [ $? -ne 0 ]; then
+    echo "*********************************************************************************************"
+    echo "(1/4) An error occured while downloading supplementary files."
+    echo "*********************************************************************************************"
+    exit $?
+else
+    echo "*********************************************************************************************"
+    echo "(2/4) All supplementary files downloaded."
+    echo "*********************************************************************************************"
+fi
+
+echo " "
+
 echo "*********************************************************************************************"
-echo "(1/2) Cloning repositories. This may take a while. Make sure to be connected to the internet."
+echo "(2/4) Cloning repositories. This may take a while. Make sure to be connected to the internet."
 echo "*********************************************************************************************"
+DUNE_VERSION=2.7
 # the core modules
 for MOD in common geometry grid localfunctions istl; do
     if [ ! -d "dune-$MOD" ]; then
         git clone -b releases/$DUNE_VERSION https://gitlab.dune-project.org/core/dune-$MOD.git
     else
         echo "Skip cloning dune-$MOD because the folder already exists."
+        git checkout releases/$DUNE_VERSION
     fi
-cd dune-$MOD
-git checkout releases/$DUNE_VERSION
-cd ..
 done
 
 # extension modules
@@ -67,58 +92,66 @@ for MOD in dune-foamgrid dune-alugrid; do
         git clone -b releases/$DUNE_VERSION https://gitlab.dune-project.org/extensions/$MOD.git
     else
         echo "Skip cloning $MOD because the folder already exists."
+        git checkout releases/$DUNE_VERSION
     fi
-cd $MOD
-git checkout releases/$DUNE_VERSION
-cd ..
 done
 
 # dune-subgrid
 if [ ! -d "dune-subgrid" ]; then
-    git clone -b releases/$DUNE_VERSION-1 https://git.imp.fu-berlin.de/agnumpde/dune-subgrid.git
+    git clone -b releases/2.6-1  https://git.imp.fu-berlin.de/agnumpde/dune-subgrid.git
 else
     echo "Skip cloning dune-subgrid because the folder already exists."
+    git checkout releases/2.6-1
 fi
-cd dune-subgrid
-git checkout releases/$DUNE_VERSION-1
-cd ..
 
 # dumux
 if [ ! -d "dumux" ]; then
-    git clone -b releases/3.0 https://git.iws.uni-stuttgart.de/dumux-repositories/dumux.git
+    #git clone -b releases/3.2 https://git.iws.uni-stuttgart.de/dumux-repositories/dumux.git
+    git clone https://git.iws.uni-stuttgart.de/dumux-repositories/dumux.git
 else
     echo "Skip cloning dumux because the folder already exists."
+    #git checkout releases/3.2
+    git checkout master
 fi
 
 # dumux-course
 if [ ! -d "dumux-course" ]; then
-    git clone -b releases/3.0 https://git.iws.uni-stuttgart.de/dumux-repositories/dumux-course.git
+#     git clone -b releases/3.2 https://git.iws.uni-stuttgart.de/dumux-repositories/dumux-course.git
+    git clone https://git.iws.uni-stuttgart.de/dumux-repositories/dumux-course.git
 else
     echo "Skip cloning dumux-course because the folder already exists."
+    #git checkout releases/3.2
+    git checkout master
 fi
 
 if [ $? -ne 0 ]; then
     echo "*********************************************************************************************"
-    echo "Failed to clone the repositories."
+    echo "(2/4) Failed to clone the repositories. Look for repository specific errors."
     echo "*********************************************************************************************"
     exit $?
+else
+    echo "*********************************************************************************************"
+    echo "(3/4) All repositories have been cloned into a containing folder."
+    echo "*********************************************************************************************"
 fi
 
-echo "*********************************************************************************************"
-echo "(2/2) Configure dune modules and dumux. Build the dune libaries. This may take several minutes."
-echo "*********************************************************************************************"
-# run build
+echo " "
+
+echo "**************************************************************************************************"
+echo "(3/4) Configure and build dune modules and dumux using dunecontrol. This may take several minutes."
+echo "**************************************************************************************************"
+
+# run dunecontrol
 ./dune-common/bin/dunecontrol --opts=cmake.opts all
-#
+
 if [ $? -ne 0 ]; then
     echo "*********************************************************************************************"
-    echo "Failed to build the dune libaries."
+    echo "(3/4) Failed to build the dune libaries."
     echo "*********************************************************************************************"
     exit $?
+else
+    echo "*****************************************************************************************************"
+    echo "(4/4) Succesfully configured and built dune and dumux."
+    echo "      Please change to the dumux folder and run the test_dumux.sh script to confirm everything works."
+    echo "*****************************************************************************************************"
 fi
-
-# echo result
-echo "*********************************************************************************************"
-echo "Succesfully configured and built dune and dumux."
-echo "Please change to the dumux folder and run the test_dumux.sh script to confirm everything works."
-echo "*********************************************************************************************"