Contents

#!/usr/bin/env ruby

require 'json'
require 'methadone'

class JsonField
  include Methadone::Main
  include Methadone::CLILogging

  description "parse JSON and extract a field value"
  arg :json_path, "path to object to extract, eg. 'headers.0' or 'document.author.name'"
  arg :json, :optional, "data to parse (reads from stdin if not given)"

  main do |path, input = nil|
    input ||= STDIN.read
    data = JSON.parse input
    result = data.extract_field *(path.split '.', -1)
    puts result
  end
end

class Hash
  def extract_field head = nil, *tail
    return self unless head
    field_not_found! head unless has_key? head
    self[head].extract_field *tail
  end
end

class Array
  def extract_field head = nil, *tail
    return self unless head
    index = Integer(head) rescue field_not_found!(head)
    field_not_found! index if index >= size
    self[index].extract_field *tail
  end
end

class Object
  def extract_field head = nil, *tail
    field_not_found! head if head
    self
  end

  def field_not_found! field
    raise Methadone::Error.new(2, "No field #{field} in #{inspect}")
  end
end

JsonField.go!

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
conjur-cli-2.6.0	bin/jsonfield
conjur-cli-2.4.1	bin/jsonfield
conjur-cli-2.4.0	bin/jsonfield
conjur-cli-2.3.0	bin/jsonfield
conjur-cli-2.2.1	bin/jsonfield