Allow symlinking to frontendlauncher from other dirs (#19346)

src/bin/frontendlauncher

@@ -45,6 +45,15 @@
 #
 ###############################################################################
 
+#
+# Function to resolve through potential symlinks to actual dir where script lives
+#
+script_dirname() {
+    lnk=$(readlink -f "$1")
+    scrdir=$(dirname $lnk)
+    echo $scrdir
+}
+
 # Determine VisIt architecture
 osname=$(uname)
 if test "$osname" = "Linux"; then
@@ -90,7 +99,7 @@ done
 
 # Find the most recent VisIt python
 visitpython=""
-dir="$(dirname $0)"
+dir="$(script_dirname $0)"
 for ver in $versions; do
     thispython="$dir/../$ver/$platform/bin/python"
     thispython3="$dir/../$ver/$platform/bin/python3"
@@ -176,10 +185,10 @@ if test "$version" != ""; then
 fi
 
 # Execute VisIt's Python or system Python, depending on what's available
-frontendlauncherpy="$(dirname $0)/frontendlauncher.py"
+frontendlauncherpy="$(script_dirname $0)/frontendlauncher.py"
 unset PYTHONHOME
 if test -n "$visitpython"; then
-    visitdir="$(dirname $(dirname $visitpython))"
+    visitdir="$(dirname $(script_dirname $visitpython))"
 
     # Which Python was VisIt built against? Look for python<ver> executable
     # next to the python binary we located already.