Read settings from options.

etc/options

@@ -13,6 +13,7 @@ option dof_version : string = "Unreleased"
      (* "Unreleased" for development, semantic version for releases *)
 
 option dof_isabelle : string = "2021-1" 
+option dof_afp : string = "afp-2021-12-28"
 
 option dof_latest_version : string = "1.2.0"    
 option dof_latest_isabelle : string = "Isabelle2021"

etc/settings

@@ -3,9 +3,3 @@
 ISABELLE_DOF_HOME="$COMPONENT"
 ISABELLE_DOCS="$ISABELLE_DOF_HOME/doc":"$ISABELLE_DOCS"
 
-# Isabelle and AFP Configuration
-ISABELLE_VERSION="Isabelle2021-1"
-ISABELLE_URL="https://isabelle.in.tum.de/website-Isabelle2021-1/"
-AFP_DATE="afp-2021-12-28"
-AFP_URL="https://www.isa-afp.org/release/"$AFP_DATE".tar.gz"
-#

install-afp

@@ -30,6 +30,7 @@
 #set -e
 shopt -s nocasematch
 
+
 print_help()
 {
     echo "Usage: isabelle env ./install-afp [OPTION] "
@@ -58,8 +59,8 @@ check_isabelle_version() {
         echo "    version of Isabelle and rerun the install script, providing the"
         echo "    the \"isabelle\" command as argument."
         echo "    Isabelle ($ISABELLE_VERSION) can be obtained from:"
-        echo "    $ISABELLE_URL"
-        echo 
+        echo "    https://isabelle.in.tum.de/website-$ISABELLE_VERSION/"
+        echo ""
         read -p "    Still continue (y/N)? " -n 1 -r
         echo 
         if [[ $REPLY =~ ^[Yy]$ ]];
@@ -130,6 +131,10 @@ done
 
 ACTUAL_ISABELLE_VERSION=`$ISABELLE_TOOL version`
 
+ISABELLE_VERSION="Isabelle$($ISABELLE_TOOL options -g dof_isabelle)"
+AFP_DATE="$($ISABELLE_TOOL options -g dof_afp)"
+AFP_URL="https://www.isa-afp.org/release/"$AFP_DATE".tar.gz"
+
 echo ""
 echo "Isabelle/DOF Installer"
 echo "======================"