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Reference

Table of Contents

Functions

  • extlib::cache_data: Retrieves data from a cache file, or creates it with supplied data if the file doesn't exist
  • extlib::cidr_to_netmask: Converts an CIDR address of the form 192.168.0.1/24 into its netmask.
  • extlib::cidr_to_network: Converts a CIDR address of the form 2001:DB8::/32 or 192.0.2.0/24 into their network address (also known as net address)
  • extlib::default_content: Takes an optional content and an optional template name and returns the contents of a file.
  • extlib::dir_clean: Take a path and normalise it to its Unix form.
  • extlib::dir_split: Splits the given directory or directories into individual paths.
  • extlib::dump_args: Prints the args to STDOUT in Pretty JSON format.
  • extlib::dump_params: this function is used to get a list of parameters passed to or resource.
  • extlib::echo: This function outputs the variable content and its type to the debug log. It's similiar to the notice function but provides a better output
  • extlib::file_separator: Returns the os specific file path separator.
  • extlib::has_module: A function that lets you know whether a specific module is on your modulepath.
  • extlib::ip_to_cron: Provides a "random" value to cron based on the last bit of the machine IP address. used to avoid starting a certain cron job at the same time
  • extlib::is_in_cidr: Returns a boolean indicating whether an IP address is part of a network CIDR
  • extlib::last_in_cidr: Converts an IPv4 or IPv6 CIDR address of the form 192.0.2.1/24 or 2001:db8::1/64 into the last address in the network
  • extlib::mkdir_p: Like the unix command mkdir_p except with puppet code.
  • extlib::netmask_to_cidr: Converts an octet netmask address of the form 255.255.255.0 into its CIDR variant. Thus making it directly usable with the values from facter.
  • extlib::path_join: Take one or more paths and join them together
  • extlib::random_password: A function to return a string of arbitrary length that contains randomly selected characters.
  • extlib::read_url: Fetch a string from a URL (should only be used with 'small' remote files). This function should only be used with trusted/internal sources.
  • extlib::resources_deep_merge: Deeply merge a "defaults" hash into a "resources" hash like the ones expected by create_resources().
  • extlib::sort_by_version: A function that sorts an array of version numbers.
  • extlib::to_ini: This converts a puppet hash to an INI string.

Based on https://github.com/mmckinst/puppet-hash2stuff/blob/master/lib/puppet/parser/functions/hash2ini.rb

Functions

extlib::cache_data

Type: Ruby 4.x API

Retrieves data from a cache file, or creates it with supplied data if the file doesn't exist

Useful for having data that's randomly generated once on the master side (e.g. a password), but then stays the same on subsequent runs. Because it's stored on the master on disk, it doesn't work when you use mulitple Puppet masters that don't share their vardir.

Examples

Calling the function
$password = cache_data('mysql', 'mysql_password', 'this_is_my_password')
With a random password
$password = cache_data('mysql', 'mysql_password', random_password())

extlib::cache_data(String[1] $namespace, String[1] $name, Any $initial_data)

Retrieves data from a cache file, or creates it with supplied data if the file doesn't exist

Useful for having data that's randomly generated once on the master side (e.g. a password), but then stays the same on subsequent runs. Because it's stored on the master on disk, it doesn't work when you use mulitple Puppet masters that don't share their vardir.

Returns: Any The cached value when it exists. The initial data when no cache exists

Examples
Calling the function
$password = cache_data('mysql', 'mysql_password', 'this_is_my_password')
With a random password
$password = cache_data('mysql', 'mysql_password', random_password())
namespace

Data type: String[1]

Namespace for the cache

name

Data type: String[1]

Cache key within the namespace

initial_data

Data type: Any

The data for when there is no cache yet

extlib::cidr_to_netmask

Type: Ruby 4.x API

Imported by Tim 'bastelfreak' Meusel into voxpupuli/extlib because Yelp/netstdlib got abandoned

Examples

calling the function
extlib::cidr_to_netmask('127.0.0.1/8')

extlib::cidr_to_netmask(Variant[Stdlib::IP::Address::V4::CIDR,Stdlib::IP::Address::V6::CIDR] $ip)

Imported by Tim 'bastelfreak' Meusel into voxpupuli/extlib because Yelp/netstdlib got abandoned

Returns: Variant[Stdlib::IP::Address::V4::Nosubnet,Stdlib::IP::Address::V6::Nosubnet] IPv6 or IPv4 netmask address

Examples
calling the function
extlib::cidr_to_netmask('127.0.0.1/8')
ip

Data type: Variant[Stdlib::IP::Address::V4::CIDR,Stdlib::IP::Address::V6::CIDR]

IPv6 or IPv4 address in CIDR notation

extlib::cidr_to_network

Type: Ruby 4.x API

Imported by Tim 'bastelfreak' Meusel into voxpupuli/extlib because Yelp/netstdlib got abandoned

Examples

calling the function
extlib::cidr_to_network('2001:DB8::/32')

extlib::cidr_to_network(Variant[Stdlib::IP::Address::V4::CIDR,Stdlib::IP::Address::V6::CIDR] $ip)

Imported by Tim 'bastelfreak' Meusel into voxpupuli/extlib because Yelp/netstdlib got abandoned

Returns: Variant[Stdlib::IP::Address::V4::Nosubnet,Stdlib::IP::Address::V6::Nosubnet] IPv6 or IPv4 network/net address

Examples
calling the function
extlib::cidr_to_network('2001:DB8::/32')
ip

Data type: Variant[Stdlib::IP::Address::V4::CIDR,Stdlib::IP::Address::V6::CIDR]

IPv6 or IPv4 address in CIDR notation

extlib::default_content

Type: Ruby 4.x API

Takes an optional content and an optional template name and returns the contents of a file.

Examples

Using the function with a file resource.
$config_file_content = default_content($file_content, $template_location)
file { '/tmp/x':
  ensure  => 'file',
  content => $config_file_content,
}

extlib::default_content(Optional[String] $content, Optional[String] $template_name)

Takes an optional content and an optional template name and returns the contents of a file.

Returns: Optional[String] Returns the value of the content parameter if it's a non empty string. Otherwise returns the rendered output from template_name. Returns undef if both content and template_name are undef.

Examples
Using the function with a file resource.
$config_file_content = default_content($file_content, $template_location)
file { '/tmp/x':
  ensure  => 'file',
  content => $config_file_content,
}
content

Data type: Optional[String]

template_name

Data type: Optional[String]

The path to an .erb or .epp template file or undef.

extlib::dir_clean

Type: Puppet Language

Instead of having to deal with the different separators between Unix and Windows this function instead formats Windows paths a equivalent Unix like path.

$dir is defined as a Variant to support cleaning 'c:' which is not a valid Stdlib::Absolutepath

Examples

clean Unix paths to return /tmp/test/libs (i.e. noop)
extlib::dir_clean('/tmp/test/libs')
Clean Windows paths to return /c/test/libs
extlib::dir_clean('c:\\'test\\libs')

extlib::dir_clean(Variant[Stdlib::Absolutepath, Pattern[/\A[a-zA-Z]:\z/]] $dir)

Instead of having to deal with the different separators between Unix and Windows this function instead formats Windows paths a equivalent Unix like path.

$dir is defined as a Variant to support cleaning 'c:' which is not a valid Stdlib::Absolutepath

Returns: Stdlib::Unixpath Stdlib::Unixpath The cleaned path

Examples
clean Unix paths to return /tmp/test/libs (i.e. noop)
extlib::dir_clean('/tmp/test/libs')
Clean Windows paths to return /c/test/libs
extlib::dir_clean('c:\\'test\\libs')
dir

Data type: Variant[Stdlib::Absolutepath, Pattern[/\A[a-zA-Z]:\z/]]

The path to clean

extlib::dir_split

Type: Puppet Language

Use this function when you need to split a absolute path into multiple absolute paths that all descend from the given path.

Examples

calling the function
extlib::dir_split('/opt/puppetlabs') => ['/opt', '/opt/puppetlabs']

extlib::dir_split(Variant[Stdlib::Absolutepath, Array[Stdlib::Absolutepath]] $dirs)

Use this function when you need to split a absolute path into multiple absolute paths that all descend from the given path.

Returns: Array[String] - an array of absolute paths after being cut into individual paths.

Examples
calling the function
extlib::dir_split('/opt/puppetlabs') => ['/opt', '/opt/puppetlabs']
dirs

Data type: Variant[Stdlib::Absolutepath, Array[Stdlib::Absolutepath]]

  • either an absolute path or a array of absolute paths.

extlib::dump_args

Type: Ruby 4.x API

Prints the args to STDOUT in Pretty JSON format.

Useful for debugging purposes only. Ideally you would use this in conjunction with a rspec-puppet unit test. Otherwise the output will be shown during a puppet run when verbose/debug options are enabled.

extlib::dump_args(Any $args)

Prints the args to STDOUT in Pretty JSON format.

Useful for debugging purposes only. Ideally you would use this in conjunction with a rspec-puppet unit test. Otherwise the output will be shown during a puppet run when verbose/debug options are enabled.

Returns: Undef Returns nothing.

args

Data type: Any

The data you want to dump as pretty JSON.

extlib::dump_params

Type: Ruby 4.x API

this function is used to get a list of parameters passed to or resource.

Examples

Passing Parameters from a profile straight though to a base class
class profile::foobar ($param1, $param2) {
   class { 'foobar':
     *                => extlib::dump_params,
     additional_param => 'foobar',
   }
 }
Passing parameters directly to a config file.
class foobar ($app_param1, $app_param2, $class_param1) {
  file { '/etc/foo/config.yaml':
    ensure => file,
    # class param and name are not understoof by the foo app
    content => extlib::dump_params(['name', 'class_param1']).to_yaml
  }
}

extlib::dump_params(Optional[Array[String[1]]] $filter_keys)

The extlib::dump_params function.

Returns: Any

Examples
Passing Parameters from a profile straight though to a base class
class profile::foobar ($param1, $param2) {
   class { 'foobar':
     *                => extlib::dump_params,
     additional_param => 'foobar',
   }
 }
Passing parameters directly to a config file.
class foobar ($app_param1, $app_param2, $class_param1) {
  file { '/etc/foo/config.yaml':
    ensure => file,
    # class param and name are not understoof by the foo app
    content => extlib::dump_params(['name', 'class_param1']).to_yaml
  }
}
filter_keys

Data type: Optional[Array[String[1]]]

an optional parameters of keys to filter out. default value is set to 'name'

extlib::echo

Type: Ruby 4.x API

This function outputs the variable content and its type to the debug log. It's similiar to the notice function but provides a better output format useful to trace variable types and values in the manifests.

$v1 = 'test'
$v2 = ["1", "2", "3"]
$v3 = {"a"=>"1", "b"=>"2"}
$v4 = true
# $v5 is not defined
$v6 = { "b" => { "b" => [1,2,3], "c" => true, "d" => { 'x' => 'y' }}, 'x' => 'y', 'z' => [1,2,3,4,5,6]}
$v7 = 12345

echo($v1, 'My string')
echo($v2, 'My array')
echo($v3, 'My hash')
echo($v4, 'My boolean')
echo($v5, 'My undef')
echo($v6, 'My structure')
echo($v7) # no comment here
debug log output
My string (String) "test"
My array (Array) ["1", "2", "3"]
My hash (Hash) {"a"=>"1", "b"=>"2"}
My boolean (TrueClass) true
My undef (String) ""
My structure (Hash) {"b"=>{"b"=>["1", "2", "3"], "c"=>true, "d"=>{"x"=>"y"}}, "x"=>"y", "z"=>["1", "2", "3", "4", "5", "6"]}
(String) "12345"

extlib::echo(Any $value, Optional[String] $comment)

This function outputs the variable content and its type to the debug log. It's similiar to the notice function but provides a better output format useful to trace variable types and values in the manifests.

$v1 = 'test'
$v2 = ["1", "2", "3"]
$v3 = {"a"=>"1", "b"=>"2"}
$v4 = true
# $v5 is not defined
$v6 = { "b" => { "b" => [1,2,3], "c" => true, "d" => { 'x' => 'y' }}, 'x' => 'y', 'z' => [1,2,3,4,5,6]}
$v7 = 12345

echo($v1, 'My string')
echo($v2, 'My array')
echo($v3, 'My hash')
echo($v4, 'My boolean')
echo($v5, 'My undef')
echo($v6, 'My structure')
echo($v7) # no comment here
debug log output
My string (String) "test"
My array (Array) ["1", "2", "3"]
My hash (Hash) {"a"=>"1", "b"=>"2"}
My boolean (TrueClass) true
My undef (String) ""
My structure (Hash) {"b"=>{"b"=>["1", "2", "3"], "c"=>true, "d"=>{"x"=>"y"}}, "x"=>"y", "z"=>["1", "2", "3", "4", "5", "6"]}
(String) "12345"

Returns: Undef Returns nothing.

value

Data type: Any

The value you want to inspect.

comment

Data type: Optional[String]

An optional comment to prepend to the debug output.

extlib::file_separator

Type: Puppet Language

Returns the os specific file path separator.

Examples

Example of how to use
extlib::file_separator() => '/'

extlib::file_separator()

The extlib::file_separator function.

Returns: String - The os specific path separator.

Examples
Example of how to use
extlib::file_separator() => '/'

extlib::has_module

Type: Ruby 4.x API

A function that lets you know whether a specific module is on your modulepath.

Examples

Calling the function
extlib::has_module('camptocamp/systemd')

extlib::has_module(Pattern[/\A\w+[-\/]\w+\z/] $module_name)

A function that lets you know whether a specific module is on your modulepath.

Returns: Boolean Returns true or false.

Examples
Calling the function
extlib::has_module('camptocamp/systemd')
module_name

Data type: Pattern[/\A\w+[-\/]\w+\z/]

The full name of the module you want to know exists or not. Namespace and modulename can be separated with either - or /.

extlib::ip_to_cron

Type: Ruby 4.x API

Provides a "random" value to cron based on the last bit of the machine IP address. used to avoid starting a certain cron job at the same time on all servers. Takes the runinterval in seconds as parameter and returns an array of [hour, minute]

example usage

ip_to_cron(3600) - returns [ '*', one value between 0..59 ]
ip_to_cron(1800) - returns [ '*', an array of two values between 0..59 ]
ip_to_cron(7200) - returns [ an array of twelve values between 0..23, one value between 0..59 ]

extlib::ip_to_cron(Optional[Integer[1]] $runinterval)

Provides a "random" value to cron based on the last bit of the machine IP address. used to avoid starting a certain cron job at the same time on all servers. Takes the runinterval in seconds as parameter and returns an array of [hour, minute]

example usage

ip_to_cron(3600) - returns [ '*', one value between 0..59 ]
ip_to_cron(1800) - returns [ '*', an array of two values between 0..59 ]
ip_to_cron(7200) - returns [ an array of twelve values between 0..23, one value between 0..59 ]

Returns: Array

runinterval

Data type: Optional[Integer[1]]

The number of seconds to use as the run interval

extlib::is_in_cidr

Type: Ruby 4.x API

Returns a boolean indicating whether an IP address is part of a network CIDR

Examples

Calling the function
'192.0.2.42'.extlib::is_in_cidr('192.0.2.0/24')

extlib::is_in_cidr(Stdlib::IP::Address::Nosubnet $ip, Variant[Stdlib::IP::Address::V4::CIDR,Stdlib::IP::Address::V6::CIDR] $cidr)

The extlib::is_in_cidr function.

Returns: Boolean

Examples
Calling the function
'192.0.2.42'.extlib::is_in_cidr('192.0.2.0/24')
ip

Data type: Stdlib::IP::Address::Nosubnet

IPv4 or IPv6 address

cidr

Data type: Variant[Stdlib::IP::Address::V4::CIDR,Stdlib::IP::Address::V6::CIDR]

CIDR you want to check whether the IP address is in or not

extlib::last_in_cidr

Type: Ruby 4.x API

Imported by Tim 'bastelfreak' Meusel into voxpupuli/extlib because Yelp/netstdlib got abandoned

Examples

calling the function
extlib::last_in_cidr('127.0.0.1/8')

extlib::last_in_cidr(Variant[Stdlib::IP::Address::V4::CIDR,Stdlib::IP::Address::V6::CIDR] $ip)

Imported by Tim 'bastelfreak' Meusel into voxpupuli/extlib because Yelp/netstdlib got abandoned

Returns: Variant[Stdlib::IP::Address::V4::Nosubnet,Stdlib::IP::Address::V6::Nosubnet] last address in the network

Examples
calling the function
extlib::last_in_cidr('127.0.0.1/8')
ip

Data type: Variant[Stdlib::IP::Address::V4::CIDR,Stdlib::IP::Address::V6::CIDR]

IP address in CIDR notation

extlib::mkdir_p

Type: Puppet Language

This creates file resources for all directories and utilizes the dir_split() function to get a list of all the descendant directories. You will have no control over any other parameters for the file resource. If you wish to control the file resources you can use the dir_split() function and get an array of directories for use in your own code. Please note this does not use an exec resource.

  • Note splits the given directories into paths that are then created using file resources

Examples

How to use
extlib::mkdir_p('/opt/puppetlabs/bin') => ['/opt', '/opt/puppetlabs', '/opt/puppetlabs/bin']

extlib::mkdir_p(Variant[Stdlib::Absolutepath, Array[Stdlib::Absolutepath]] $dirs)

This creates file resources for all directories and utilizes the dir_split() function to get a list of all the descendant directories. You will have no control over any other parameters for the file resource. If you wish to control the file resources you can use the dir_split() function and get an array of directories for use in your own code. Please note this does not use an exec resource.

Returns: Array[Stdlib::Absolutepath]

Examples
How to use
extlib::mkdir_p('/opt/puppetlabs/bin') => ['/opt', '/opt/puppetlabs', '/opt/puppetlabs/bin']
dirs

Data type: Variant[Stdlib::Absolutepath, Array[Stdlib::Absolutepath]]

  • the path(s) to create

extlib::netmask_to_cidr

Type: Ruby 4.x API

Converts an octet netmask address of the form 255.255.255.0 into its CIDR variant. Thus making it directly usable with the values from facter.

Examples

calling the function
extlib::netmask_to_cidr('255.0.0.0')

extlib::netmask_to_cidr(Stdlib::IP::Address::Nosubnet $netmask)

The extlib::netmask_to_cidr function.

Returns: Integer[0, 128] CIDR / prefix length

Examples
calling the function
extlib::netmask_to_cidr('255.0.0.0')
netmask

Data type: Stdlib::IP::Address::Nosubnet

IPv6 or IPv4 netmask in octet notation

extlib::path_join

Type: Puppet Language

This function will format a windows paths into equivalent unix like paths. This type of unix like path should work on windows.

Examples

Joining Unix paths to return /tmp/test/libs
extlib::path_join(['/tmp', 'test', 'libs'])
Joining Windows paths to return /c/test/libs
extlib::path_join(['c:', 'test', 'libs'])

extlib::path_join(Variant[String, Array[String]] $dirs)

This function will format a windows paths into equivalent unix like paths. This type of unix like path should work on windows.

Returns: Stdlib::Absolutepath The joined path

Examples
Joining Unix paths to return /tmp/test/libs
extlib::path_join(['/tmp', 'test', 'libs'])
Joining Windows paths to return /c/test/libs
extlib::path_join(['c:', 'test', 'libs'])
dirs

Data type: Variant[String, Array[String]]

Joins two or more directories by file separator.

extlib::random_password

Type: Ruby 4.x API

A function to return a string of arbitrary length that contains randomly selected characters.

Examples

Calling the function
random_password(42)

extlib::random_password(Integer[1] $length)

A function to return a string of arbitrary length that contains randomly selected characters.

Returns: String The random string returned consists of alphanumeric characters excluding 'look-alike' characters.

Examples
Calling the function
random_password(42)
length

Data type: Integer[1]

The length of random password you want generated.

extlib::read_url

Type: Ruby 4.x API

Fetch a string from a URL (should only be used with 'small' remote files).

This function should only be used with trusted/internal sources. This is especially important if using it in conjunction with inline_template or inline_epp. The current implementation is also very basic. No thought has gone into timeouts, support for redirects, CA paths etc.

Examples

Calling the function
extlib::read_url('https://example.com/sometemplate.epp')

extlib::read_url(Stdlib::HTTPUrl $url)

Fetch a string from a URL (should only be used with 'small' remote files).

This function should only be used with trusted/internal sources. This is especially important if using it in conjunction with inline_template or inline_epp. The current implementation is also very basic. No thought has gone into timeouts, support for redirects, CA paths etc.

Returns: String Returns the contents of the url as a string

Examples
Calling the function
extlib::read_url('https://example.com/sometemplate.epp')
url

Data type: Stdlib::HTTPUrl

The URL to read from

extlib::resources_deep_merge

Type: Ruby 4.x API

Deeply merge a "defaults" hash into a "resources" hash like the ones expected by create_resources().

Internally calls the puppetlabs-stdlib function deep_merge(). In case of duplicate keys the resources hash keys win over the defaults hash keys.

Example

$defaults_hash = {
  'one'   => '1',
  'two'   => '2',
  'three' => '3',
  'four'  => {
    'five'  => '5',
    'six'   => '6',
    'seven' => '7',
  }
}

$numbers_hash = {
  'german' => {
    'one'   => 'eins',
    'three' => 'drei',
    'four'  => {
      'six' => 'sechs',
    },
  },
  'french' => {
    'one' => 'un',
    'two' => 'deux',
    'four' => {
      'five'  => 'cinq',
      'seven' => 'sept',
    },
  }
}

$result_hash = resources_deep_merge($numbers_hash, $defaults_hash)

The $result_hash then looks like this:

$result_hash = {
  'german' => {
    'one'   => 'eins',
    'two'   => '2',
    'three' => 'drei',
    'four'  => {
      'five'  => '5',
      'six'   => 'sechs',
      'seven' => '7',
    }
  },
  'french' => {
    'one'   => 'un',
    'two'   => 'deux',
    'three' => '3',
    'four'  => {
      'five'  => 'cinq',
      'six'   => '6',
      'seven' => 'sept',
    }
  }
}

extlib::resources_deep_merge(Hash $resources, Hash $defaults)

Deeply merge a "defaults" hash into a "resources" hash like the ones expected by create_resources().

Internally calls the puppetlabs-stdlib function deep_merge(). In case of duplicate keys the resources hash keys win over the defaults hash keys.

Example

$defaults_hash = {
  'one'   => '1',
  'two'   => '2',
  'three' => '3',
  'four'  => {
    'five'  => '5',
    'six'   => '6',
    'seven' => '7',
  }
}

$numbers_hash = {
  'german' => {
    'one'   => 'eins',
    'three' => 'drei',
    'four'  => {
      'six' => 'sechs',
    },
  },
  'french' => {
    'one' => 'un',
    'two' => 'deux',
    'four' => {
      'five'  => 'cinq',
      'seven' => 'sept',
    },
  }
}

$result_hash = resources_deep_merge($numbers_hash, $defaults_hash)

The $result_hash then looks like this:

$result_hash = {
  'german' => {
    'one'   => 'eins',
    'two'   => '2',
    'three' => 'drei',
    'four'  => {
      'five'  => '5',
      'six'   => 'sechs',
      'seven' => '7',
    }
  },
  'french' => {
    'one'   => 'un',
    'two'   => 'deux',
    'three' => '3',
    'four'  => {
      'five'  => 'cinq',
      'six'   => '6',
      'seven' => 'sept',
    }
  }
}

Returns: Hash Returns the merged hash.

resources

Data type: Hash

The hash of resources.

defaults

Data type: Hash

The hash of defaults to merge.

extlib::sort_by_version

Type: Ruby 4.x API

A function that sorts an array of version numbers.

Examples

Calling the function
extlib::sort_by_version(['10.0.0b12', '10.0.0b3', '10.0.0a2', '9.0.10', '9.0.3'])

extlib::sort_by_version(Array[String] $versions)

A function that sorts an array of version numbers.

Returns: Array[String] Returns the sorted array.

Examples
Calling the function
extlib::sort_by_version(['10.0.0b12', '10.0.0b3', '10.0.0a2', '9.0.10', '9.0.3'])
versions

Data type: Array[String]

An array of version strings you want sorted.

extlib::to_ini

Type: Ruby 4.x API

This converts a puppet hash to an INI string.

Based on https://github.com/mmckinst/puppet-hash2stuff/blob/master/lib/puppet/parser/functions/hash2ini.rb

Examples

How to output ini to a file
file { '/tmp/config.ini':
  ensure  => file,
  content => extlib::to_ini($myhash),
}

extlib::to_ini(Hash $data, Optional[Hash] $settings)

The extlib::to_ini function.

Returns: String Converted data as ini string

Examples
How to output ini to a file
file { '/tmp/config.ini':
  ensure  => file,
  content => extlib::to_ini($myhash),
}
data

Data type: Hash

Data structure which needs to be converted into ini

settings

Data type: Optional[Hash]

Override default ini generation settings