summaryrefslogtreecommitdiff
path: root/README.markdown
blob: d66d6f067bff518e90cea0147796d96f518a4af7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
# Puppet Labs Standard Library #

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](http://projects.puppetlabs.com/projects/stdlib)

# Versions #

This module follows semver.org (v1.0.0) versioning guidelines.  The standard
library module is released as part of [Puppet
Enterprise](http://puppetlabs.com/puppet/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.

# Compatibility #

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

## stdlib 2.x ##

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

## stdlib 3.x ##

The 3.0 major release of stdlib drops support for Puppet 2.6.  Stdlib 3.x
supports Puppet 2.7.

# Functions #

abs
---
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

bool2num
--------
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

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


- *Type*: rvalue

chomp
-----
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

chop
----
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

create_resources
----------------
Converts a hash into a set of resources and adds them to the catalog.

This function takes two mandatory arguments: a resource type, and a hash describing
a set of resources. The hash should be in the form `{title => {parameters} }`:

    # A hash of user resources:
    $myusers = {
      'nick' => { uid    => '1330',
                  group  => allstaff,
                  groups => ['developers', 'operations', 'release'], }
      'dan'  => { uid    => '1308',
                  group  => allstaff,
                  groups => ['developers', 'prosvc', 'release'], }
    }

    create_resources(user, $myusers)

A third, optional parameter may be given, also as a hash:

    $defaults => {
      'ensure'   => present,
      'provider' => 'ldap',
    }

    create_resources(user, $myusers, $defaults)

The values given on the third argument are added to the parameters of each resource
present in the set given on the second argument. If a parameter is present on both
the second and third arguments, the one on the second argument takes precedence.

This function can be used to create defined resources and classes, as well
as native resources.


- *Type*: statement

crit
----
Log a message on the server at level crit.

- *Type*: statement

debug
-----
Log a message on the server at level debug.

- *Type*: statement

defined
-------
Determine whether
a given class or resource type is defined. This function can also determine whether a
specific resource has been declared. Returns true or false. Accepts class names,
type names, and resource references.

The `defined` function checks both native and defined types, including types
provided as plugins via modules. Types and classes are both checked using their names:

    defined("file")
    defined("customtype")
    defined("foo")
    defined("foo::bar")

Resource declarations are checked using resource references, e.g.
`defined( File['/tmp/myfile'] )`. Checking whether a given resource
has been declared is, unfortunately, dependent on the parse order of
the configuration, and the following code will not work:

    if defined(File['/tmp/foo']) {
        notify("This configuration includes the /tmp/foo file.")
    }
    file {"/tmp/foo":
        ensure => present,
    }

However, this order requirement refers to parse order only, and ordering of
resources in the configuration graph (e.g. with `before` or `require`) does not
affect the behavior of `defined`.

- *Type*: rvalue

defined_with_params
-------------------
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

delete
------
Deletes a selected element from an array.

*Examples:*

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

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


- *Type*: rvalue

delete_at
---------
Deletes a determined indexed value from an array.

*Examples:*

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

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


- *Type*: rvalue

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


- *Type*: rvalue

emerg
-----
Log a message on the server at level emerg.

- *Type*: statement

empty
-----
Returns true if the variable is empty.


- *Type*: rvalue

ensure_resource
---------------
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

err
---
Log a message on the server at level err.

- *Type*: statement

extlookup
---------
This is a parser function to read data from external files, this version
uses CSV files but the concept can easily be adjust for databases, yaml
or any other queryable data source.

The object of this is to make it obvious when it's being used, rather than
magically loading data in when an module is loaded I prefer to look at the code
and see statements like:

    $snmp_contact = extlookup("snmp_contact")

The above snippet will load the snmp_contact value from CSV files, this in its
own is useful but a common construct in puppet manifests is something like this:

    case $domain {
      "myclient.com": { $snmp_contact = "John Doe <john@myclient.com>" }
      default:        { $snmp_contact = "My Support <support@my.com>" }
    }

Over time there will be a lot of this kind of thing spread all over your manifests
and adding an additional client involves grepping through manifests to find all the
places where you have constructs like this.

This is a data problem and shouldn't be handled in code, a using this function you
can do just that.

First you configure it in site.pp:

    $extlookup_datadir = "/etc/puppet/manifests/extdata"
    $extlookup_precedence = ["%{fqdn}", "domain_%{domain}", "common"]

The array tells the code how to resolve values, first it will try to find it in
web1.myclient.com.csv then in domain_myclient.com.csv and finally in common.csv

Now create the following data files in /etc/puppet/manifests/extdata:

    domain_myclient.com.csv:
      snmp_contact,John Doe <john@myclient.com>
      root_contact,support@%{domain}
      client_trusted_ips,192.168.1.130,192.168.10.0/24

    common.csv:
      snmp_contact,My Support <support@my.com>
      root_contact,support@my.com

Now you can replace the case statement with the simple single line to achieve
the exact same outcome:

   $snmp_contact = extlookup("snmp_contact")

The above code shows some other features, you can use any fact or variable that
is in scope by simply using %{varname} in your data files, you can return arrays
by just having multiple values in the csv after the initial variable name.

In the event that a variable is nowhere to be found a critical error will be raised
that will prevent your manifest from compiling, this is to avoid accidentally putting
in empty values etc.  You can however specify a default value:

   $ntp_servers = extlookup("ntp_servers", "1.${country}.pool.ntp.org")

In this case it will default to "1.${country}.pool.ntp.org" if nothing is defined in
any data file.

You can also specify an additional data file to search first before any others at use
time, for example:

    $version = extlookup("rsyslog_version", "present", "packages")
    package{"rsyslog": ensure => $version }

This will look for a version configured in packages.csv and then in the rest as configured
by $extlookup_precedence if it's not found anywhere it will default to `present`, this kind
of use case makes puppet a lot nicer for managing large amounts of packages since you do not
need to edit a load of manifests to do simple things like adjust a desired version number.

Precedence values can have variables embedded in them in the form %{fqdn}, you could for example do:

    $extlookup_precedence = ["hosts/%{fqdn}", "common"]

This will result in /path/to/extdata/hosts/your.box.com.csv being searched.

This is for back compatibility to interpolate variables with %. % interpolation is a workaround for a problem that has been fixed: Puppet variable interpolation at top scope used to only happen on each run.

- *Type*: rvalue

fail
----
Fail with a parse error.

- *Type*: statement

file
----
Return the contents of a file.  Multiple files
can be passed, and the first file that exists will be read in.

- *Type*: rvalue

flatten
-------
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

fqdn_rand
---------
Generates random numbers based on the node's fqdn. Generated random values
will be a range from 0 up to and excluding n, where n is the first parameter.
The second argument specifies a number to add to the seed and is optional, for example:

    $random_number = fqdn_rand(30)
    $random_number_seed = fqdn_rand(30,30)

- *Type*: rvalue

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


- *Type*: rvalue

generate
--------
Calls an external command on the Puppet master and returns
the results of the command.  Any arguments are passed to the external command as
arguments.  If the generator does not exit with return code of 0,
the generator is considered to have failed and a parse error is
thrown.  Generators can only have file separators, alphanumerics, dashes,
and periods in them.  This function will attempt to protect you from
malicious generator calls (e.g., those with '..' in them), but it can
never be entirely safe.  No subshell is used to execute
generators, so all shell metacharacters are passed directly to
the generator.

- *Type*: rvalue

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

Example:
  $module_path = get_module_path('stdlib')


- *Type*: rvalue

getvar
------
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

grep
----
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

has_key
-------
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

hash
----
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

include
-------
Evaluate one or more classes.

- *Type*: statement

info
----
Log a message on the server at level info.

- *Type*: statement

inline_template
---------------
Evaluate a template string and return its value.  See 
[the templating docs](http://docs.puppetlabs.com/guides/templating.html) for 
more information.  Note that if multiple template strings are specified, their 
output is all concatenated and returned as the output of the function.

- *Type*: rvalue

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


- *Type*: rvalue

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


- *Type*: rvalue

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


- *Type*: rvalue

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


- *Type*: rvalue

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


- *Type*: rvalue

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


- *Type*: rvalue

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


- *Type*: rvalue

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


- *Type*: rvalue

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


- *Type*: rvalue

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

*Examples:*

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

Would result in: "a,b,c"


- *Type*: rvalue

keys
----
Returns the keys of a hash as an array.


- *Type*: rvalue

loadyaml
--------
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

lstrip
------
Strips leading spaces to the left of a string.


- *Type*: rvalue

md5
---
Returns a MD5 hash value from a provided string.

- *Type*: rvalue

member
------
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

merge
-----
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

notice
------
Log a message on the server at level notice.

- *Type*: statement

num2bool
--------
This function converts a number into a true boolean. Zero becomes false. Numbers
higher then 0 become true.


- *Type*: rvalue

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


- *Type*: rvalue

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


- *Type*: rvalue

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

*Examles:*

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

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


- *Type*: rvalue

range
-----
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

realize
-------
Make a virtual object real.  This is useful
when you want to know the name of the virtual object and don't want to
bother with a full collection.  It is slightly faster than a collection,
and, of course, is a bit shorter.  You must pass the object using a
reference; e.g.: `realize User[luke]`.

- *Type*: statement

regsubst
--------
Perform regexp replacement on a string or array of strings.

* *Parameters* (in order):
    * _target_  The string or array of strings to operate on.  If an array, the replacement will be performed on each of the elements in the array, and the return value will be an array.
    * _regexp_  The regular expression matching the target string.  If you want it anchored at the start and or end of the string, you must do that with ^ and $ yourself.
    * _replacement_  Replacement string. Can contain backreferences to what was matched using \0 (whole match), \1 (first set of parentheses), and so on.
    * _flags_  Optional. String of single letter flags for how the regexp is interpreted:
        - *E*         Extended regexps
        - *I*         Ignore case in regexps
        - *M*         Multiline regexps
        - *G*         Global replacement; all occurrences of the regexp in each target string will be replaced.  Without this, only the first occurrence will be replaced.
    * _encoding_  Optional.  How to handle multibyte characters.  A single-character string with the following values:
        - *N*         None
        - *E*         EUC
        - *S*         SJIS
        - *U*         UTF-8

* *Examples*

Get the third octet from the node's IP address:

    $i3 = regsubst($ipaddress,'^(\d+)\.(\d+)\.(\d+)\.(\d+)$','\3')

Put angle brackets around each octet in the node's IP address:

    $x = regsubst($ipaddress, '([0-9]+)', '<\1>', 'G')


- *Type*: rvalue

require
-------
Evaluate one or more classes,  adding the required class as a dependency.

The relationship metaparameters work well for specifying relationships
between individual resources, but they can be clumsy for specifying
relationships between classes.  This function is a superset of the
'include' function, adding a class relationship so that the requiring
class depends on the required class.

Warning: using require in place of include can lead to unwanted dependency cycles.

For instance the following manifest, with 'require' instead of 'include' would produce a nasty dependence cycle, because notify imposes a before between File[/foo] and Service[foo]:

    class myservice {
      service { foo: ensure => running }
    }

    class otherstuff {
      include myservice
      file { '/foo': notify => Service[foo] }
    }

Note that this function only works with clients 0.25 and later, and it will
fail if used with earlier clients.



- *Type*: statement

reverse
-------
Reverses the order of a string or array.


- *Type*: rvalue

rstrip
------
Strips leading spaces to the right of the string.


- *Type*: rvalue

search
------
Add another namespace for this class to search.
This allows you to create classes with sets of definitions and add
those classes to another class's search path.

- *Type*: statement

sha1
----
Returns a SHA1 hash value from a provided string.

- *Type*: rvalue

shellquote
----------
Quote and concatenate arguments for use in Bourne shell.

Each argument is quoted separately, and then all are concatenated
shuffle
-------
Randomizes the order of a string or array elements.


- *Type*: rvalue

size
----
Returns the number of elements in a string or array.


- *Type*: rvalue

sort
----
Sorts strings and arrays lexically.


- *Type*: rvalue

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


- *Type*: rvalue

str2bool
--------
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

str2saltedsha512
----------------
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

strftime
--------
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

strip
-----
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

swapcase
--------
This function will swap the existing case of a string.

*Examples:*

    swapcase("aBcD")

Would result in: "AbCd"


- *Type*: rvalue

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

*Examples:*

    time()

Will return something like: 1311972653


- *Type*: rvalue

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


- *Type*: rvalue

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

* string
* array
* hash
* float
* integer
* boolean


- *Type*: rvalue

unique
------
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

upcase
------
Converts a string or an array of strings to uppercase.

*Examples:*

    upcase("abcd")

Will return:

    ASDF


- *Type*: rvalue

validate_absolute_path
----------------------
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_array
--------------
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_bool
-------------
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_hash
-------------
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

validate_re
-----------
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_slength
----------------
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_string
---------------
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

values
------
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

values_at
---------
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

zip
---
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



----------------

*This page autogenerated on Thu Aug 16 10:53:05 -0700 2012*