Working with JSON in Bash

json-bash-examples.sh

#!/bin/bash

# Methods for working with json in bash
# ************************************************************* #
# Setup

BUCKET_NAME=testbucket
OBJECT_NAME=testworkflow-2.0.1.jar
TARGET_LOCATION=/opt/test/testworkflow-2.0.1.jar

# ************************************************************* #




# Using JQ
JSON_STRING=$(jq -c -n \
    --arg bn "$BUCKET_NAME" \
    --arg on "$OBJECT_NAME" \
    --arg tl "$TARGET_LOCATION" \
    '{bucketname: $bn, objectname: $on, targetlocation: $tl}')
   
echo "JSON via jq:"
echo "$JSON_STRING"
echo ""




# ************************************************************* #



# Using printf
echo "JSON via printf:"
JSON_FMT='{"bucketname":"%s","objectname":"%s","targetlocation":"%s"}\n'
printf "$JSON_FMT" "$BUCKET_NAME" "$OBJECT_NAME" "$TARGET_LOCATION"
echo ""




# ************************************************************* #




# Using concatenation
echo "JSON via string concatenation:"
JSON_STRING='{"bucketname":"'"$BUCKET_NAME"'","objectname":"'"$OBJECT_NAME"'","targetlocation":"'"$TARGET_LOCATION"'"}'
echo "$JSON_STRING"