druid/examples/bin/select_example.sh

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#!/usr/bin/env bash
function select_example() {
example_outvar=$1
examples_dir=$2
find_pattern=$3
example_arg=$4
default_file=$5
if [[ -n ${example_arg} ]]; then
if [[ -f ${example_arg} ]]; then
example_file=${example_arg}
else
example_file="${examples_dir}/${example_arg}/${default_file}"
fi
fi
all_examples=($(find ${examples_dir} -name "${find_pattern}"))
while [[ -z ${example_file} || ! -f ${example_file} ]] ; do
if [[ -n ${example_file} ]]; then
echo "No example found at ${example_file}."
fi
echo "Please specify an example by its number."
echo "Examples available:"
LINE=0
for e in ${all_examples[@]}; do
LINE=$((LINE+1))
REL_FILE=${e#${examples_dir}/}
DESC=`grep 'description' $e | tail -1 | sed 's/"description"[^"]*"\([^"]*\)".*/\1/' `
echo "${LINE} - ${REL_FILE} - ${DESC:-No Description}"
done
read -p "[1] > " NUM_SELECTED
echo " "
NUM_SELECTED=${NUM_SELECTED:-1}
example_file=${all_examples[$((NUM_SELECTED-1))]}
done
eval $example_outvar="'$example_file'"
}