Move under www to ease rsync

www/eps/hpr3013/hpr3013_bash21_ex6.sh

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+#!/usr/bin/env bash
+
+#-------------------------------------------------------------------------------
+# Example 6 for Bash Tips show 21: a poor way to make a configuration file
+#-------------------------------------------------------------------------------
+
+#
+# Example configuration file using 'export'
+#
+CFG1='bash21_ex6_1.cfg'
+if [[ ! -e $CFG1 ]]; then
+    echo "Unable to find $CFG1"
+    exit 1
+fi
+
+#
+# Alternative configuration file using 'declare', converted from the other one
+#
+CFG2='bash21_ex6_2.cfg'
+
+#
+# Strip out all of the 'export' commands with 'sed' in a process substitution,
+# turning the lines into simple variable declarations. Use 'source' to obey
+# all of the resulting commands
+#
+source <(sed 's/^export //' $CFG1)
+
+#
+# Scan the (simple) variables beginning with '_CFG_' and convert them into
+# a portable form by saving the output of 'declare -p'
+#
+declare -p "${!_CFG_@}" > $CFG2
+
+#
+# Now next time we can 'source' this file instead when we want the variables
+#
+cat $CFG2
+
+exit