Use yq to convert serialized formats

json-convert.sh

#!/bin/bash

# Function to parse and validate format options
parse_format() {
  local -l fmt=$1
  case "$fmt" in
    a | auto) echo "auto" ;;
    y | yaml) echo "yaml" ;;
    j | json) echo "json" ;;
    p | props) echo "props" ;;
    c | csv) echo "csv" ;;
    x | xml) echo "xml" ;;
    b | base64) echo "base64" ;;
    u | uri) echo "uri" ;;
    t | toml) echo "toml" ;;
    l | lua) echo "lua" ;;
    *)
      echo "Error: Invalid format: '$fmt'. Valid formats are: [auto|yaml|json|props|csv|tsv|xml|base64|uri|toml|lua]" >&2
      return 1
      ;;
  esac
  return 0
}

# Default options
OPT_INPUT_FORMAT="auto"
OPT_OUTPUT_FORMAT="yaml"

# Use getopt for argument parsing
# Define options: i: (input format), o: (output format)
# The ":" indicates that the option requires an argument
OPTS=$(getopt -o i:o: --long input-format:,output-format: -n 'json-convert' -- "$@")

if [[ $? != 0 ]]; then
  # getopt found an error
  echo "Error in command line arguments." >&2
  exit 1
fi

# Evaluate the options
eval set -- "$OPTS"

while true; do
  case "$1" in
    -i | --input-format)
      if OPT_INPUT_FORMAT=$(parse_format "$2"); then
        shift 2
      else
        exit 1
      fi
      ;;
    -o | --output-format)
      if OPT_OUTPUT_FORMAT=$(parse_format "$2"); then
        shift 2
      else
        exit 1
      fi
      ;;
    --)
      shift
      break
      ;;
    *)
      echo "Internal error!" >&2
      exit 1
      ;;
  esac
done

# Pass remaining arguments to yq
yq --input-format "$OPT_INPUT_FORMAT" --output-format "$OPT_OUTPUT_FORMAT" "$@"