Class: LambdaWhenever::Option

Inherits:
Object
  • Object
show all
Defined in:
lib/lambda_whenever/option.rb

Overview

The Option class handles parsing and validation of command-line options.

Defined Under Namespace

Classes: InvalidOptionException

Constant Summary collapse

POSSIBLE_RULE_STATES = 
%w[ENABLED DISABLED].freeze
DRYRUN_MODE = 
1
UPDATE_MODE = 
2
CLEAR_MODE = 
3
LIST_MODE = 
4
5
SYNC_MODE = 
6

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(args) ⇒ Option

Returns a new instance of Option.



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# File 'lib/lambda_whenever/option.rb', line 20

def initialize(args)
  @mode = DRYRUN_MODE
  @verbose = false
  @variables = []
  @schedule_file = "config/schedule.rb"
  @iam_role = nil
  @rule_state = "ENABLED"
  @lambda_name = nil
  @scheduler_group = "lambda-whenever-dev-group"
  @region = nil

  OptionParser.new do |opts|
    opts.on("--dryrun", "dry-run") do
      @mode = DRYRUN_MODE
    end
    opts.on("--update", "clear and create schedules") do
      @mode = UPDATE_MODE
    end
    opts.on("--sync", "Creates and deletes tasks as needed by schedule file") do
      @mode = SYNC_MODE
    end
    opts.on("-c", "--clear", "Clear scheduled tasks") do
      @mode = CLEAR_MODE
    end
    opts.on("-l", "--list", "List scheduled tasks") do
      @mode = LIST_MODE
    end
    opts.on("-v", "--version", "Print version") do
      @mode = PRINT_VERSION_MODE
    end
    opts.on("-s", "--set variables", "Example: --set 'environment=staging'") do |set|
      pairs = set.split("&")
      pairs.each do |pair|
        unless pair.include?("=")
          Logger.instance.warn("Ignore variable set: #{pair}")
          next
        end
        key, value = pair.split("=")
        @variables << { key: key, value: value }
      end
    end
    opts.on("--lambda-name name", "Lambda function name") do |name|
      @lambda_name = name
    end
    opts.on("--scheduler-group group_name",
            "Optionally specify event bridge scheduler group name") do |group|
      @scheduler_group = group
    end
    opts.on("-f", "--file schedule_file", "Default: config/schedule.rb") do |file|
      @schedule_file = file
    end
    opts.on("--iam-role name", "IAM role name used by EventBridgeScheduler.") do |role|
      @iam_role = role
    end
    opts.on("--rule-state state", "The state of the EventBridgeScheduler Rule. Default: ENABLED") do |state|
      @rule_state = state
    end
    opts.on("--region region", "AWS region") do |region|
      @region = region
    end
    opts.on("-V", "--verbose", "Run rake jobs without --silent") do
      @verbose = true
    end
  end.parse(args)
end

Instance Attribute Details

#iam_role ⇒ Object (readonly)

Returns the value of attribute iam_role.



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# File 'lib/lambda_whenever/option.rb', line 15

def iam_role
  @iam_role
end

#lambda_name ⇒ Object (readonly)

Returns the value of attribute lambda_name.



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# File 'lib/lambda_whenever/option.rb', line 15

def lambda_name
  @lambda_name
end

#mode ⇒ Object (readonly)

Returns the value of attribute mode.



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# File 'lib/lambda_whenever/option.rb', line 15

def mode
  @mode
end

#rule_state ⇒ Object (readonly)

Returns the value of attribute rule_state.



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# File 'lib/lambda_whenever/option.rb', line 15

def rule_state
  @rule_state
end

#schedule_file ⇒ Object (readonly)

Returns the value of attribute schedule_file.



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# File 'lib/lambda_whenever/option.rb', line 15

def schedule_file
  @schedule_file
end

#scheduler_group ⇒ Object (readonly)

Returns the value of attribute scheduler_group.



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# File 'lib/lambda_whenever/option.rb', line 15

def scheduler_group
  @scheduler_group
end

#variables ⇒ Object (readonly)

Returns the value of attribute variables.



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# File 'lib/lambda_whenever/option.rb', line 15

def variables
  @variables
end

#verbose ⇒ Object (readonly)

Returns the value of attribute verbose.



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# File 'lib/lambda_whenever/option.rb', line 15

def verbose
  @verbose
end

Instance Method Details

#aws_config ⇒ Object 



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# File 'lib/lambda_whenever/option.rb', line 95

def aws_config
  @aws_config ||= { region: region }.delete_if { |_k, v| v.nil? }
end

#iam_client ⇒ Object 



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# File 'lib/lambda_whenever/option.rb', line 99

def iam_client
  @iam_client ||= Aws::IAM::Client.new(aws_config)
end

#key ⇒ Object 



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# File 'lib/lambda_whenever/option.rb', line 111

def key
  Digest::SHA1.hexdigest(
    [
      variables,
      iam_role,
      rule_state,
      lambda_name,
      scheduler_group
    ].join
  )
end

#lambda_client ⇒ Object 



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# File 'lib/lambda_whenever/option.rb', line 103

def lambda_client
  @lambda_client ||= Aws::Lambda::Client.new(aws_config)
end

#scheduler_client ⇒ Object 



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# File 'lib/lambda_whenever/option.rb', line 107

def scheduler_client
  @scheduler_client ||= Aws::Scheduler::Client.new(aws_config)
end

#validate! ⇒ Object

Raises:



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# File 'lib/lambda_whenever/option.rb', line 86

def validate!
  raise InvalidOptionException, "Can't find file: #{schedule_file}" unless File.exist?(schedule_file)
  raise InvalidOptionException, "You must set lambda-name" unless lambda_name
  raise InvalidOptionException, "You must set iam-role" unless iam_role
  return if POSSIBLE_RULE_STATES.include?(rule_state)

  raise InvalidOptionException, "Invalid rule state. Possible values are #{POSSIBLE_RULE_STATES.join(", ")}"
end