Bash incantation for defining whiptail radiolist programmatically

.cadenzaClient.json

{
  "activeDatabase": "localhost",
  "databases": [
    {
      "name": "production",
      "PGDB": "asdf",
      "PGHOST": "asfd",
      "PGPASSWORD": "asf",
      "PGPORT": "asdf",
      "PGUSER": "asf"
    },
    {
      "name": "localhost",
      "PGDB": "asf",
      "PGHOST": "asf",
      "PGPASSWORD": "asf",
      "PGPORT": "asdf",
      "PGUSER": "asf"
    }
  ]
}

RunResults

$ scConfig
ACTIVE_DB="$( jq -r '.activeDatabase' < "$HOME/.cadenzaClient.json" )"
::39+jq -r .activeDatabase
:39+ACTIVE_DB=localhost
info "Active database is $ACTIVE_DB"
:40+info 'Active database is localhost'
:30+printf 'Active database is localhost\n'
Active database is localhost

readarray -t dbs < <( jq -r '.databases[]|.name' < "$HOME/.cadenzaClient.json" )
:42+readarray -t dbs
 jq -r '.databases[]|.name' < "$HOME/.cadenzaClient.json"
::42+jq -r '.databases[]|.name'
DB_COUNT="$( echo "${dbs[@]}" | wc -w )"
::43+echo production localhost
::43+wc -w
:43+DB_COUNT=2
info "The $DB_COUNT databases are:\n${dbs[@]}"
:44+info 'The 2 databases are:\nproduction' localhost
:30+printf 'The 2 databases are:\nproduction\n'
The 2 databases are:
production

# initialize an array with our explicit arguments
whiptail_args=(
  --title "Select Database"
  --radiolist "Select Database:"
  10 80 "${#dbs[@]}"
)
:51+whiptail_args=(--title "Select Database" --radiolist "Select Database:" 10 80 "${#dbs[@]}")

i=0
:53+i=0
for db in "${dbs[@]}"; do
  whiptail_args+=( "$((++i))" "$db" )
  if [[ $db = "$ACTIVE_DB" ]]; then
    whiptail_args+=( "on" )
  else
    whiptail_args+=( "off" )
  fi
done
:54+for db in "${dbs[@]}"
:55+whiptail_args+=("$((++i))" "$db")
:56+[[ production = \l\o\c\a\l\h\o\s\t ]]
:59+whiptail_args+=("off")
:54+for db in "${dbs[@]}"
:55+whiptail_args+=("$((++i))" "$db")
:56+[[ localhost = \l\o\c\a\l\h\o\s\t ]]
:57+whiptail_args+=("on")

# collect both stdout and exit status
whiptail_out=$(whiptail "${whiptail_args[@]}" 3>&1 1>&2 2>&3 ); whiptail_retval=$?
::64+whiptail --title 'Select Database' --radiolist 'Select Database:' 10 80 2 1 production off 2 localhost on
:64+whiptail_out=
:64+whiptail_retval=255

# display what we collected
declare -p whiptail_out whiptail_retval
:67+declare -p whiptail_out whiptail_retval
declare -- whiptail_out=""
declare -- whiptail_retval="255"

echo "whiptail_out=$whiptail_out"
:69+echo whiptail_out=
whiptail_out=
echo "whiptail_retval=$whiptail_retval"
:70+echo whiptail_retval=255
whiptail_retval=255

scConfig

#!/bin/bash

# See https://stackoverflow.com/a/55930193/553865

#PS4=':$LINENO+'
#set -xv
ACTIVE_DB="$( jq -r '.activeDatabase' < "$HOME/.cadenzaClient.json" )"
info "Active database is $ACTIVE_DB"

readarray -t dbs < <( jq -r '.databases[]|.name' < "$HOME/.cadenzaClient.json" )
DB_COUNT="$( echo "${dbs[@]}" | wc -w )"
info "The $DB_COUNT databases are:\n${dbs[@]}"

# initialize an array with our explicit arguments
whiptail_args=(
  --title "Select Database"
  --radiolist "Select Database:"
  10 80 "${#dbs[@]}"
)

i=0
for db in "${dbs[@]}"; do
  whiptail_args+=( "$((++i))" "$db" )
  if [[ $db = "$ACTIVE_DB" ]]; then
    whiptail_args+=( "on" )
  else
    whiptail_args+=( "off" )
  fi
done

# collect both stdout and exit status
whiptail_out=$(whiptail "${whiptail_args[@]}" 3>&1 1>&2 2>&3 ); whiptail_retval=$?

# display what we collected ... comment for production
declare -p whiptail_out whiptail_retval

if [ $whiptail_retval == 255 ]; then exit 1; fi

#echo "whiptail_out=$whiptail_out"
echo "${dbs[whiptail_out-1]}"