more robust check of ISABELLE_PLATFORM_FAMILY within settings environment, to support its reunification with Isabelle/Scala (see also a33a6e541cbb, f3a356c64193);

--- a/etc/settings	Tue Jan 30 22:43:10 2024 +0100
+++ b/etc/settings	Wed Jan 31 12:43:06 2024 +0100
@@ -47,11 +47,14 @@
 ### Document preparation (cf. isabelle latex)
 ###
 
-if [ "$ISABELLE_PLATFORM_FAMILY" = "windows" ]; then
-  ISABELLE_PDFLATEX="pdflatex -interaction=nonstopmode -c-style-errors"
-else
-  ISABELLE_PDFLATEX="pdflatex -interaction=nonstopmode -file-line-error"
-fi
+case "$ISABELLE_PLATFORM_FAMILY" in
+  windows*)
+    ISABELLE_PDFLATEX="pdflatex -interaction=nonstopmode -c-style-errors"
+    ;;
+  *)
+    ISABELLE_PDFLATEX="pdflatex -interaction=nonstopmode -file-line-error"
+    ;;
+esac
 
 ISABELLE_LUALATEX="lualatex --interaction=nonstopmode --file-line-error"
 ISABELLE_BIBTEX="bibtex"
@@ -82,11 +85,14 @@
 ISABELLE_TOOLS="$ISABELLE_HOME/lib/Tools"
 
 # Location for temporary files (should be on a local file system).
-if [ "$ISABELLE_PLATFORM_FAMILY" = "windows" ]; then
-  ISABELLE_TMP_PREFIX="$TMPDIR/isabelle"
-else
-  ISABELLE_TMP_PREFIX="/tmp/isabelle-${USER:-$LOGNAME}"
-fi
+case "$ISABELLE_PLATFORM_FAMILY" in
+  windows*)
+    ISABELLE_TMP_PREFIX="$TMPDIR/isabelle"
+    ;;
+  *)
+    ISABELLE_TMP_PREFIX="/tmp/isabelle-${USER:-$LOGNAME}"
+    ;;
+esac
 
 # Heap locations.
 ISABELLE_HEAPS="$ISABELLE_HOME_USER/heaps"
@@ -121,13 +127,13 @@
 
 # "open" within desktop environment (potentially asynchronous)
 case "$ISABELLE_PLATFORM_FAMILY" in
-  linux)
+  linux*)
     ISABELLE_OPEN="xdg-open"
     ;;
-  macos)
+  macos*)
     ISABELLE_OPEN="open"
     ;;
-  windows)
+  windows*)
     ISABELLE_OPEN="cygstart"
     ;;
 esac

--- a/lib/Tools/scala	Tue Jan 30 22:43:10 2024 +0100
+++ b/lib/Tools/scala	Wed Jan 31 12:43:06 2024 +0100
@@ -12,8 +12,10 @@
 export jvm_cp_args="$(platform_path "$ISABELLE_CLASSPATH")"
 export JAVA_OPTS="$ISABELLE_JAVA_SYSTEM_OPTIONS -J-Dscala.usejavacp=true"
 
-if [ "$ISABELLE_PLATFORM_FAMILY" = "windows" ]; then
-  export TERM=dumb
+case "$ISABELLE_PLATFORM_FAMILY" in
+  windows*)
+    export TERM=dumb
+    ;;
 fi
 
 isabelle_scala scala $ISABELLE_SCALAC_OPTIONS "$@"

--- a/lib/scripts/getfunctions	Tue Jan 30 22:43:10 2024 +0100
+++ b/lib/scripts/getfunctions	Wed Jan 31 12:43:06 2024 +0100
@@ -137,21 +137,21 @@
   for X in "$@"
   do
     case "$ISABELLE_PLATFORM_FAMILY" in
-      linux)
+      linux*)
         if [ -z "$LD_LIBRARY_PATH" ]; then
           export LD_LIBRARY_PATH="$X"
         else
           export LD_LIBRARY_PATH="$LD_LIBRARY_PATH:$X"
         fi
         ;;
-      macos)
+      macos*)
         if [ -z "$JAVA_LIBRARY_PATH" ]; then
           export JAVA_LIBRARY_PATH="$X"
         else
           export JAVA_LIBRARY_PATH="$JAVA_LIBRARY_PATH:$X"
         fi
         ;;
-      windows)
+      windows*)
         if [ -z "$PATH" ]; then
           export PATH="$X"
         else

--- a/lib/scripts/getsettings	Tue Jan 30 22:43:10 2024 +0100
+++ b/lib/scripts/getsettings	Wed Jan 31 12:43:06 2024 +0100
@@ -94,11 +94,14 @@
 fi
 
 #POLYML_EXE
-if [ "$ISABELLE_PLATFORM_FAMILY" = "windows" ]; then
-  POLYML_EXE="$ML_HOME/poly.exe"
-else
-  POLYML_EXE="$ML_HOME/poly"
-fi
+case "$ISABELLE_PLATFORM_FAMILY" in
+  windows*)
+    POLYML_EXE="$ML_HOME/poly.exe"
+    ;;
+  *)
+    POLYML_EXE="$ML_HOME/poly"
+    ;;
+esac
 
 #ML system identifier
 if [ -z "$ML_PLATFORM" ]; then

--- a/lib/scripts/java-gui-setup	Tue Jan 30 22:43:10 2024 +0100
+++ b/lib/scripts/java-gui-setup	Wed Jan 31 12:43:06 2024 +0100
@@ -2,10 +2,11 @@
 #
 # java-gui-setup --- platform-specific setup for Java/Swing GUI applications
 
-if [ "$ISABELLE_PLATFORM_FAMILY" = "macos" ]
-then
-  JAVA_VERSION="$("$ISABELLE_JDK_HOME/bin/java" -version 2>&1 | head -n 1 | cut -d '"' -f2)"
-  JAVA_DOMAIN="com.azul.zulu.${JAVA_VERSION}.java"
-  defaults read "$JAVA_DOMAIN" AppleWindowTabbingMode >/dev/null 2>/dev/null ||
-    defaults write "$JAVA_DOMAIN" AppleWindowTabbingMode manual >/dev/null 2>/dev/null
-fi
+case "$ISABELLE_PLATFORM_FAMILY" in
+  macos*)
+    JAVA_VERSION="$("$ISABELLE_JDK_HOME/bin/java" -version 2>&1 | head -n 1 | cut -d '"' -f2)"
+    JAVA_DOMAIN="com.azul.zulu.${JAVA_VERSION}.java"
+    defaults read "$JAVA_DOMAIN" AppleWindowTabbingMode >/dev/null 2>/dev/null ||
+      defaults write "$JAVA_DOMAIN" AppleWindowTabbingMode manual >/dev/null 2>/dev/null
+    ;;
+esac

--- a/src/Pure/Admin/component_jdk.scala	Tue Jan 30 22:43:10 2024 +0100
+++ b/src/Pure/Admin/component_jdk.scala	Wed Jan 31 12:43:06 2024 +0100
@@ -91,15 +91,15 @@
 
     component_dir.write_settings("""
 case "$ISABELLE_PLATFORM_FAMILY" in
-  linux)
+  linux*)
     ISABELLE_JAVA_PLATFORM="$ISABELLE_PLATFORM64"
     ISABELLE_JDK_HOME="$COMPONENT/$ISABELLE_JAVA_PLATFORM"
     ;;
-  windows)
+  windows*)
     ISABELLE_JAVA_PLATFORM="$ISABELLE_WINDOWS_PLATFORM64"
     ISABELLE_JDK_HOME="$COMPONENT/$ISABELLE_JAVA_PLATFORM"
     ;;
-  macos)
+  macos*)
     if [ -n "$ISABELLE_APPLE_PLATFORM64" -a -d "$COMPONENT/$ISABELLE_APPLE_PLATFORM64" ]
     then
       ISABELLE_JAVA_PLATFORM="$ISABELLE_APPLE_PLATFORM64"

--- a/src/Pure/System/isabelle_platform.scala	Tue Jan 30 22:43:10 2024 +0100
+++ b/src/Pure/System/isabelle_platform.scala	Wed Jan 31 12:43:06 2024 +0100
@@ -52,11 +52,9 @@
     if (family0 == "linux" && is_arm) "linux_arm" else family0
   }
 
-  def is_linux: Boolean =
-    ISABELLE_PLATFORM_FAMILY == "linux" ||
-    ISABELLE_PLATFORM_FAMILY == "linux_arm"
-  def is_macos: Boolean = ISABELLE_PLATFORM_FAMILY == "macos"
-  def is_windows: Boolean = ISABELLE_PLATFORM_FAMILY == "windows"
+  def is_linux: Boolean = ISABELLE_PLATFORM_FAMILY.startsWith("linux")
+  def is_macos: Boolean = ISABELLE_PLATFORM_FAMILY.startsWith("macos")
+  def is_windows: Boolean = ISABELLE_PLATFORM_FAMILY.startsWith("windows")
 
   def arch_64: String = if (is_arm) "arm64" else "x86_64"
   def arch_64_32: String = if (is_arm) "arm64_32" else "x86_64_32"

--- a/src/Tools/VSCode/src/component_vscodium.scala	Tue Jan 30 22:43:10 2024 +0100
+++ b/src/Tools/VSCode/src/component_vscodium.scala	Wed Jan 31 12:43:06 2024 +0100
@@ -376,13 +376,16 @@
     component_dir.write_settings("""
 ISABELLE_VSCODIUM_HOME="$COMPONENT/${ISABELLE_WINDOWS_PLATFORM64:-$ISABELLE_PLATFORM64}"
 
-if [ "$ISABELLE_PLATFORM_FAMILY" = "macos" ]; then
-  ISABELLE_VSCODIUM_ELECTRON="$ISABELLE_VSCODIUM_HOME/VSCodium.app/Contents/MacOS/Electron"
-  ISABELLE_VSCODIUM_RESOURCES="$ISABELLE_VSCODIUM_HOME/VSCodium.app/Contents/Resources"
-else
-  ISABELLE_VSCODIUM_ELECTRON="$ISABELLE_VSCODIUM_HOME/electron"
-  ISABELLE_VSCODIUM_RESOURCES="$ISABELLE_VSCODIUM_HOME/resources"
-fi
+case "$ISABELLE_PLATFORM_FAMILY" in
+  "macos"*)
+    ISABELLE_VSCODIUM_ELECTRON="$ISABELLE_VSCODIUM_HOME/VSCodium.app/Contents/MacOS/Electron"
+    ISABELLE_VSCODIUM_RESOURCES="$ISABELLE_VSCODIUM_HOME/VSCodium.app/Contents/Resources"
+    ;;
+  *)
+    ISABELLE_VSCODIUM_ELECTRON="$ISABELLE_VSCODIUM_HOME/electron"
+    ISABELLE_VSCODIUM_RESOURCES="$ISABELLE_VSCODIUM_HOME/resources"
+    ;;
+esac
 """)