33 lines
806 B
Bash
33 lines
806 B
Bash
#!/bin/bash
|
|
|
|
# Check if the script is provided with the correct number of arguments
|
|
if [ $# -lt 1 ] || [ $# -gt 2 ]; then
|
|
echo "Usage: $0 <key> [<index>]"
|
|
exit 1
|
|
fi
|
|
|
|
# Key provided as the first argument
|
|
key="$1"
|
|
|
|
# Set index to 0 if not provided as the second argument
|
|
index="${2:-0}"
|
|
|
|
# Check if the JSON file exists
|
|
json_file="reference-rpc-endpoint.json"
|
|
if [ ! -f "$json_file" ]; then
|
|
echo "Error: JSON file '$json_file' not found."
|
|
exit 1
|
|
fi
|
|
|
|
# Use jq to extract the element of the array corresponding to the key and index
|
|
element=$(jq -r ".$key[$index]" "$json_file")
|
|
|
|
# Check if the key exists in the JSON file
|
|
if [ "$element" = "null" ]; then
|
|
echo "Error: Key '$key' not found in the JSON file or index '$index' out of range."
|
|
exit 1
|
|
fi
|
|
|
|
# Print the element
|
|
echo "$element"
|