fix: Improve top level dir setup script

setup.sh

@@ -10,6 +10,8 @@ usage()
   echo "./setup.sh [--help|-h]"
   echo ""
   echo " --help             Display this help text"
+  echo " --prefix=PREFIX    Install any binaries needed to build inference-engine in 'PREFIX/bin'"
+  echo "                    Default prefix='\$HOME/.local/bin'"
   echo ""
 }
 
@@ -45,35 +47,50 @@ if ! command -v gfortran > /dev/null ; then
   exit 1
 fi
 
+install_fpm_from_source()
+{
+  echo "Installing fpm in following location: $PREFIX/bin"
+  echo "Ensure $PREFIX/bin is in your path or rerun script with the --prefix=PREFIX flag"
+  if ! command -v curl > /dev/null ; then
+    echo "Need curl to download source file for fpm to install it"
+    echo "Please install curl and then rerun ./setup.sh"
+    exit 1
+  fi
+  mkdir temp-dir-to-build-fpm-for-inference-engine-installation
+  curl -L -o temp-dir-to-build-fpm-for-inference-engine-installation/fpm.F90 https://github.com/fortran-lang/fpm/releases/download/current/fpm.F90
+  gfortran -o $PREFIX/bin/fpm -Jtemp-dir-to-build-fpm-for-inference-engine-installation temp-dir-to-build-fpm-for-inference-engine-installation/fpm.F90
+  rm -rf temp-dir-to-build-fpm-for-inference-engine-installation
+  if command -v fpm > /dev/null ; then
+    echo "fpm installed"
+  else
+    echo "Some error has occured while trying to install fpm. Please install fpm, ensure it is in your path, and rerun script"
+  fi
+}
+
+# if no fpm, install either through homebrew, or gfortran compiling fpm.F90
 if ! command -v fpm > /dev/null ; then
   if ! command -v brew > /dev/null ; then
-    if ! command -v curl > /dev/null ; then
-      echo "Please install curl and then rerun ./setup.sh"
+    if ! command -v gfortran > /dev/null ; then
+      echo "Please install fpm, ensure it is in your path, and rerun script"
       exit 1
+    else # has gfortran, but not homebrew
+      install_fpm_from_source
     fi
-    /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
-    if [ $(uname) = "Linux" ]; then
-      if [ -z "$PATH" ]; then
-        PATH=/home/linuxbrew/.linuxbrew/bin/
-      else
-        PATH=/home/linuxbrew/.linuxbrew/bin/:"$PATH"
-      fi
-    fi
+  else # has homebrew
+    brew tap fortran-lang/fortran
+    brew install fortran-lang/fortran/fpm
   fi
-  brew tap fortran-lang/fortran # required for building fpm
-  brew install fortran-lang/fortran/fpm
 fi
 
 FPM_FC=${FC:-"gfortran-13"}
 FPM_CC=${CC:-"gcc-13"}
 
 mkdir -p build
 
-fpm build --flag "-fcoarray=single -O3"
 fpm test
 
 echo ""
-echo "____________________ Inference-Engine has been set up! _______________________" 
+echo "____________________ Inference-Engine has been set up! _______________________"
 echo ""
 echo "To run one of the programs in the example subdirectory, enter a command of the"
 echo "following form at a shell command prompt after replacing <example-base-name>"