Added new startup scripts that don't blast existing ISIS environment … (

#3927)

* Added new startup scripts that don't blast existing ISIS environment variables

* Update isisStartup.csh

isis/scripts/isisStartup.csh

@@ -0,0 +1,38 @@
+#!/bin/csh
+################################################################################
+# This file should be sourced within your current shell using the "source"
+# command.
+#
+# On the command line type:
+# > setenv ISISROOT ????
+# > source isis3Startup.csh
+#
+# Replace the "????" in the above command line with the path you installed
+# the Isis distribution
+#
+################################################################################
+
+if ($?ISISROOT == 0) then
+  echo "ISISROOT environment variable is not set"
+  exit 1
+endif
+
+if ($?ISISDATA == 0) then
+  if (-d $ISISROOT/../data) then
+    setenv ISISDATA $ISISROOT/../isis_data
+  else
+    setenv ISISDATA /usgs/cpkgs/isis3/isis_data
+  endif
+endif
+
+if ($?ISISTESTDATA == 0) then
+  if (-d $ISISROOT/../testData) then
+    setenv ISISTESTDATA $ISISROOT/../testData
+  else
+    setenv ISISTESTDATA /usgs/cpkgs/isis3/isis_testData
+  endif
+endif
+
+if ( -f $ISISROOT/scripts/tabcomplete.csh ) then
+  source $ISISROOT/scripts/tabcomplete.csh;
+endif

isis/scripts/isisStartup.sh

@@ -0,0 +1,41 @@
+#!/bin/bash
+#
+# This file should be executed within your current shell using the "." or "source"
+# command.
+#
+# On the command line type:
+# > set ISISROOT=????
+# > . isis3Startup.sh
+#
+# Replace the "????" in the above command line with the path where you installed
+# the Isis distribution
+#
+if [ ! "$ISISROOT" ]; then
+  ISISROOT=/usgs/pkgs/isis3/install
+  export ISISROOT
+fi
+
+if [ ! "$ISISDATA" ]; then
+  if [ -d $ISISROOT/../data ]; then
+    ISISDATA=$ISISROOT/../isis_data
+  else
+    ISISDATA=/usgs/cpkgs/isis3/isis_data
+  fi
+  export ISISDATA
+fi
+
+if [ ! "$ISISTESTDATA" ]; then
+  if [ -d $ISISROOT/../testData ]; then
+    ISISTESTDATA=$ISISROOT/../testData
+  else
+    ISISTESTDATA=/usgs/cpkgs/isis3/isis_testData
+  fi
+  export ISISTESTDATA
+fi
+
+if [ "$PATH" ]; then
+  PATH="${PATH}:${ISISROOT}/bin"
+else
+  PATH="$ISISROOT/bin"
+fi
+export PATH