This module provides a "standard library" of resources for developing Puppet Modules. This modules will include the following additions to Puppet

• Stages
• Facts
• Functions
• Defined resource types
• Types
• Providers

This module is officially curated and provided by Puppet Labs. The modules Puppet Labs writes and distributes will make heavy use of this standard library.

To report or research a bug with any part of this module, please go to http://projects.puppetlabs.com/projects/stdlib

This module follows semver.org (v1.0.0) versioning guidelines. The standard library module is released as part of Puppet Enterprise and as a result older versions of Puppet Enterprise that Puppet Labs still supports will have bugfix maintenance branches periodically "merged up" into master. The current list of integration branches are:

• v2.1.x (v2.1.1 released in PE 1.2, 1.2.1, 1.2.3, 1.2.4)
• v2.2.x (Never released as part of PE, only to the Forge)
• v2.3.x (Released in PE 2.5.x)
• master (mainline development branch)

The first Puppet Enterprise version including the stdlib module is Puppet Enterprise 1.2.

The stdlib module does not work with Puppet versions released prior to Puppet 2.6.0.

All stdlib releases in the 2.0 major version support Puppet 2.6 and Puppet 2.7.

The 3.0 major release of stdlib drops support for Puppet 2.6. Stdlib 3.x supports Puppet 2 and Puppet 3.

Returns the absolute value of a number, for example -34.56 becomes 34.56. Takes a single integer and float value as an argument.

• Type: rvalue

Converts a boolean to a number. Converts the values: false, f, 0, n, and no to 0 true, t, 1, y, and yes to 1 Requires a single boolean or string as an input.

• Type: rvalue

Capitalizes the first letter of a string or array of strings. Requires either a single string or an array as an input.

• Type: rvalue

Removes the record separator from the end of a string or an array of strings, for example hello\n becomes hello. Requires a single string or array as an input.

• Type: rvalue

Returns a new string with the last character removed. If the string ends with \r\n, both characters are removed. Applying chop to an empty string returns an empty string. If you wish to merely remove record separators then you should use the chomp function. Requires a string or array of strings as input.

• Type: rvalue

Appends the contents of the second array onto the first array.

• Type: rvalue

Takes a resource reference and an optional hash of attributes.

Returns true if a resource with the specified attributes has already been added to the catalog, and false otherwise.

user { 'dan':
  ensure => present,
}

if ! defined_with_params(User[dan], {'ensure' => 'present' }) {
  user { 'dan': ensure => present, }
}

• Type: rvalue

Deletes a selected element from an array.

Examples:

delete(['a','b','c'], 'b')

Would return: ['a','c']

• Type: rvalue

Deletes a determined indexed value from an array.

Examples:

delete_at(['a','b','c'], 1)

Would return: ['a','c']

• Type: rvalue

Converts the case of a string or all strings in an array to lower case.

• Type: rvalue

Returns true if the variable is empty.

• Type: rvalue

Takes a resource type, title, and a list of attributes that describe a resource.

user { 'dan':
  ensure => present,
}

This example only creates the resource if it does not already exist:

ensure_resource('user, 'dan', {'ensure' => 'present' })

If the resource already exists but does not match the specified parameters, this function will attempt to recreate the resource leading to a duplicate resource definition error.

• Type: statement

This function flattens any deeply nested arrays and returns a single flat array as a result.

Examples:

flatten(['a', ['b', ['c']]])

Would return: ['a','b','c']

• Type: rvalue

Rotates an array a random number of times based on a nodes fqdn.

• Type: rvalue

Returns the absolute path of the specified module for the current environment.

Example: $module_path = get_module_path('stdlib')

• Type: rvalue

Takes a resource reference and name of the parameter and returns value of resource's parameter.

For example:

define example_resource($param) {
}

example_resource { "example_resource_instance":
    param => "param_value"
}

getparam(Example_resource["example_resource_instance"], "param")

• Type: rvalue

Lookup a variable in a remote namespace.

For example:

$foo = getvar('site::data::foo')
# Equivalent to $foo = $site::data::foo

This is useful if the namespace itself is stored in a string:

$datalocation = 'site::data'
$bar = getvar("${datalocation}::bar")
# Equivalent to $bar = $site::data::bar

• Type: rvalue

This function searches through an array and returns any elements that match the provided regular expression.

Examples:

grep(['aaa','bbb','ccc','aaaddd'], 'aaa')

Would return:

['aaa','aaaddd']

• Type: rvalue

Determine if a hash has a certain key value.

Example:

$my_hash = {'key_one' => 'value_one'}
if has_key($my_hash, 'key_two') {
  notice('we will not reach here')
}
if has_key($my_hash, 'key_one') {
  notice('this will be printed')
}

• Type: rvalue

This function converts and array into a hash.

Examples:

hash(['a',1,'b',2,'c',3])

Would return: {'a'=>1,'b'=>2,'c'=>3}

• Type: rvalue

Returns true if the variable passed to this function is an array.

• Type: rvalue

Returns true if the string passed to this function is a syntactically correct domain name.

• Type: rvalue

Returns true if the variable passed to this function is a float.

• Type: rvalue

Returns true if the variable passed to this function is a hash.

• Type: rvalue

Returns true if the variable returned to this string is an integer.

• Type: rvalue

Returns true if the string passed to this function is a valid IP address.

• Type: rvalue

Returns true if the string passed to this function is a valid mac address.

• Type: rvalue

Returns true if the variable passed to this function is a number.

• Type: rvalue

Returns true if the variable passed to this function is a string.

• Type: rvalue

This function joins an array into a string using a seperator.

Examples:

join(['a','b','c'], ",")

Would result in: "a,b,c"

• Type: rvalue

Returns the keys of a hash as an array.

• Type: rvalue

Load a YAML file containing an array, string, or hash, and return the data in the corresponding native data type.

For example:

$myhash = loadyaml('/etc/puppet/data/myhash.yaml')

• Type: rvalue

Strips leading spaces to the left of a string.

• Type: rvalue

This function determines if a variable is a member of an array.

Examples:

member(['a','b'], 'b')

Would return: true

member(['a','b'], 'c')

Would return: false

• Type: rvalue

Merges two or more hashes together and returns the resulting hash.

For example:

$hash1 = {'one' => 1, 'two', => 2}
$hash2 = {'two' => 'dos', 'three', => 'tres'}
$merged_hash = merge($hash1, $hash2)
# The resulting hash is equivalent to:
# $merged_hash =  {'one' => 1, 'two' => 'dos', 'three' => 'tres'}

When there is a duplicate key, the key in the rightmost hash will "win."

• Type: rvalue

This function converts a number into a true boolean. Zero becomes false. Numbers higher then 0 become true.

• Type: rvalue

This function accepts JSON as a string and converts into the correct Puppet structure.

• Type: rvalue

This function accepts YAML as a string and converts it into the correct Puppet structure.

• Type: rvalue

This function applies a prefix to all elements in an array.

Examles:

prefix(['a','b','c'], 'p')

Will return: ['pa','pb','pc']

• Type: rvalue

When given range in the form of (start, stop) it will extrapolate a range as an array.

Examples:

range("0", "9")

Will return: [0,1,2,3,4,5,6,7,8,9]

range("00", "09")

Will return: [0,1,2,3,4,5,6,7,8,9] (Zero padded strings are converted to integers automatically)

range("a", "c")

Will return: ["a","b","c"]

range("host01", "host10")

Will return: ["host01", "host02", ..., "host09", "host10"]

• Type: rvalue

Reverses the order of a string or array.

• Type: rvalue

Strips leading spaces to the right of the string.

• Type: rvalue

Randomizes the order of a string or array elements.

• Type: rvalue

Returns the number of elements in a string or array.

• Type: rvalue

Sorts strings and arrays lexically.

• Type: rvalue

Returns a new string where runs of the same character that occur in this set are replaced by a single character.

• Type: rvalue

This converts a string to a boolean. This attempt to convert strings that contain things like: y, 1, t, true to 'true' and strings that contain things like: 0, f, n, false, no to 'false'.

• Type: rvalue

This converts a string to a salted-SHA512 password hash (which is used for OS X versions >= 10.7). Given any simple string, you will get a hex version of a salted-SHA512 password hash that can be inserted into your Puppet manifests as a valid password attribute.

• Type: rvalue

This function returns formatted time.

Examples:

To return the time since epoch:

strftime("%s")

To return the date:

strftime("%Y-%m-%d")

Format meaning:

%a - The abbreviated weekday name (``Sun'')
%A - The  full  weekday  name (``Sunday'')
%b - The abbreviated month name (``Jan'')
%B - The  full  month  name (``January'')
%c - The preferred local date and time representation
%C - Century (20 in 2009)
%d - Day of the month (01..31)
%D - Date (%m/%d/%y)
%e - Day of the month, blank-padded ( 1..31)
%F - Equivalent to %Y-%m-%d (the ISO 8601 date format)
%h - Equivalent to %b
%H - Hour of the day, 24-hour clock (00..23)
%I - Hour of the day, 12-hour clock (01..12)
%j - Day of the year (001..366)
%k - hour, 24-hour clock, blank-padded ( 0..23)
%l - hour, 12-hour clock, blank-padded ( 0..12)
%L - Millisecond of the second (000..999)
%m - Month of the year (01..12)
%M - Minute of the hour (00..59)
%n - Newline (

) %N - Fractional seconds digits, default is 9 digits (nanosecond) %3N millisecond (3 digits) %6N microsecond (6 digits) %9N nanosecond (9 digits) %p - Meridian indicator (AM'' or PM'') %P - Meridian indicator (am'' or pm'') %r - time, 12-hour (same as %I:%M:%S %p) %R - time, 24-hour (%H:%M) %s - Number of seconds since 1970-01-01 00:00:00 UTC. %S - Second of the minute (00..60) %t - Tab character ( ) %T - time, 24-hour (%H:%M:%S) %u - Day of the week as a decimal, Monday being 1. (1..7) %U - Week number of the current year, starting with the first Sunday as the first day of the first week (00..53) %v - VMS date (%e-%b-%Y) %V - Week number of year according to ISO 8601 (01..53) %W - Week number of the current year, starting with the first Monday as the first day of the first week (00..53) %w - Day of the week (Sunday is 0, 0..6) %x - Preferred representation for the date alone, no time %X - Preferred representation for the time alone, no date %y - Year without a century (00..99) %Y - Year with century %z - Time zone as hour offset from UTC (e.g. +0900) %Z - Time zone name %% - Literal ``%'' character

• Type: rvalue

This function removes leading and trailing whitespace from a string or from every string inside an array.

Examples:

strip("    aaa   ")

Would result in: "aaa"

• Type: rvalue

This function will swap the existing case of a string.

Examples:

swapcase("aBcD")

Would result in: "AbCd"

• Type: rvalue

This function will return the current time since epoch as an integer.

Examples:

time()

Will return something like: 1311972653

• Type: rvalue

Converts the argument into bytes, for example 4 kB becomes 4096. Takes a single string value as an argument.

• Type: rvalue

Returns the type when passed a variable. Type can be one of:

• string
• array
• hash
• float
• integer
• boolean

• Type: rvalue

This function will remove duplicates from strings and arrays.

Examples:

unique("aabbcc")

Will return:

abc

You can also use this with arrays:

unique(["a","a","b","b","c","c"])

This returns:

["a","b","c"]

• Type: rvalue

Converts a string or an array of strings to uppercase.

Examples:

upcase("abcd")

Will return:

ABCD

• Type: rvalue

Validate the string represents an absolute path in the filesystem. This function works for windows and unix style paths.

The following values will pass:

$my_path = "C:/Program Files (x86)/Puppet Labs/Puppet"
validate_absolute_path($my_path)
$my_path2 = "/var/lib/puppet"
validate_absolute_path($my_path2)

The following values will fail, causing compilation to abort:

validate_absolute_path(true)
validate_absolute_path([ 'var/lib/puppet', '/var/foo' ])
validate_absolute_path([ '/var/lib/puppet', 'var/foo' ])
$undefined = undef
validate_absolute_path($undefined)

• Type: statement

Validate that all passed values are array data structures. Abort catalog compilation if any value fails this check.

The following values will pass:

$my_array = [ 'one', 'two' ]
validate_array($my_array)

The following values will fail, causing compilation to abort:

validate_array(true)
validate_array('some_string')
$undefined = undef
validate_array($undefined)

• Type: statement

Validate that all passed values are either true or false. Abort catalog compilation if any value fails this check.

The following values will pass:

$iamtrue = true
validate_bool(true)
validate_bool(true, true, false, $iamtrue)

The following values will fail, causing compilation to abort:

$some_array = [ true ]
validate_bool("false")
validate_bool("true")
validate_bool($some_array)

• Type: statement

Validate that all passed values are hash data structures. Abort catalog compilation if any value fails this check.

The following values will pass:

$my_hash = { 'one' => 'two' }
validate_hash($my_hash)

The following values will fail, causing compilation to abort:

validate_hash(true)
validate_hash('some_string')
$undefined = undef
validate_hash($undefined)

• Type: statement

Perform simple validation of a string against one or more regular expressions. The first argument of this function should be a string to test, and the second argument should be a stringified regular expression (without the // delimiters) or an array of regular expressions. If none of the regular expressions match the string passed in, compilation will abort with a parse error.

If a third argument is specified, this will be the error message raised and seen by the user.

The following strings will validate against the regular expressions:

validate_re('one', '^one$')
validate_re('one', [ '^one', '^two' ])

The following strings will fail to validate, causing compilation to abort:

validate_re('one', [ '^two', '^three' ])

A helpful error message can be returned like this:

validate_re($::puppetversion, '^2.7', 'The $puppetversion fact value does not match 2.7')

• Type: statement

Validate that the first argument is a string (or an array of strings), and less/equal to than the length of the second argument. It fails if the first argument is not a string or array of strings, and if arg 2 is not convertable to a number.

The following values will pass:

validate_slength("discombobulate",17) validate_slength(["discombobulate","moo"],17)

The following valueis will not:

validate_slength("discombobulate",1) validate_slength(["discombobulate","thermometer"],5)

• Type: statement

Validate that all passed values are string data structures. Abort catalog compilation if any value fails this check.

The following values will pass:

$my_string = "one two"
validate_string($my_string, 'three')

The following values will fail, causing compilation to abort:

validate_string(true)
validate_string([ 'some', 'array' ])
$undefined = undef
validate_string($undefined)

• Type: statement

When given a hash this function will return the values of that hash.

Examples:

$hash = {
  'a' => 1,
  'b' => 2,
  'c' => 3,
}
values($hash)

This example would return:

[1,2,3]

• Type: rvalue

Finds value inside an array based on location.

The first argument is the array you want to analyze, and the second element can be a combination of:

• A single numeric index
• A range in the form of 'start-stop' (eg. 4-9)
• An array combining the above

Examples:

values_at(['a','b','c'], 2)

Would return ['c'].

values_at(['a','b','c'], ["0-1"])

Would return ['a','b'].

values_at(['a','b','c','d','e'], [0, "2-3"])

Would return ['a','c','d'].

• Type: rvalue

Takes one element from first array and merges corresponding elements from second array. This generates a sequence of n-element arrays, where n is one more than the count of arguments.

Example:

zip(['1','2','3'],['4','5','6'])

Would result in:

["1", "4"], ["2", "5"], ["3", "6"]

• Type: rvalue