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AUGPARSE(1)							      Augeas							       AUGPARSE(1)

NAME
augparse - execute an Augeas module SYNOPSIS
augparse [OPTIONS] MODULE DESCRIPTION
Execute an Augeas module, most commonly to evaluate the tests it contains. OPTIONS
-I, --include=DIR Add DIR to the module loadpath. Can be given multiple times. The directories set here are searched before any directories specified in the AUGEAS_LENS_LIB environment variable, and before the default directory /usr/share/augeas/lenses. -t, --trace Print a trace of the modules that are being loaded. --nostdinc Do not search any of the default directories for modules. When this option is set, only directories specified explicitly with -I or specified in AUGEAS_LENS_LIB will be searched for modules. --notypecheck Do not perform lens type checks. Only use this option during lens development and make sure you typecheck lenses when you are done developing - you should never use a lens that hasn't been typechecked. This option is sometimes useful when you are working on unit tests for a lens to speed up the time it takes to repeatedly run and fix tests. --version Print version information and exit. -h Display this help and exit EXAMPLES
To run the tests in lenses/tests/test_foo.aug and use modules from the directory lenses, run augparse -I lenses lenses/tests/test_foo.aug TESTS
Tests can appear as top-level forms anywhere in a module. Generally, the tests for a module lenses/foo.aug are kept in a separate file, usually in lenses/tests/test_foo.aug. There are two different kinds of tests that Augeas can run: get and put tests. The syntax for get tests is test LENS get STRING = RESULT which applies the get direction of the lens LENS to STRING and compares it with the given RESULT. RESULT can either be a tree literal, the symbol ? to print the result of applying LENS to STRING, or the symbol * to indicate that the test should produce an exception. The syntax for put tests is test LENS put STRING after COMMANDS = RESULT which first applies the get direction of the lens LENS to STRING, then applies the given COMMANDS to the resulting tree, and finally transforms the modified tree back to a string using the put direction of LENS. The resulting string is then compared to RESULT, which can be a string, the symbol ? to print the result of applying LENS to STRING, or the symbol * to indicate that the test should produce an exception. SEE ALSO
Augeas project homepage <http://www.augeas.net/> augtool Augeas 1.0.0 2013-02-06 AUGPARSE(1)

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Config::Model::Backend::Augeas(3pm)			User Contributed Perl Documentation		       Config::Model::Backend::Augeas(3pm)

NAME
Config::Model::Backend::Augeas - Read and write config data through Augeas SYNOPSIS
# model specification with augeas backend { config_class_name => 'OpenSsh::Sshd', # try Augeas and fall-back with custom method read_config => [ { backend => 'augeas' , file => '/etc/ssh/sshd_config', # declare "seq" Augeas elements sequential_lens => [/AcceptEnv AllowGroups [etc]/], }, { backend => 'custom' , # dir hardcoded in custom class class => 'Config::Model::Sshd' } ], # write_config will be written using read_config specifications element => ... } DESCRIPTION
This class provides a way to load or store configuration data through Config::Augeas. This way, the structure and commments of the original configuration file will preserved. To use Augeas as a backend, you must specify the following "read_config" parameters: backend Use "augeas" (or "Augeas")in this case. save Either "backup" or "newfile". See "Constructor" in Config::Augeas for details. file Name of the configuration file. sequential_lens This one is tricky. Set to one when new Augeas list or hash node must be created for each new list or hash element. See "Sequential lens" for details. For instance: read_config => [ { backend => 'augeas' , save => 'backup', file => '/etc/ssh/sshd_config', # declare "seq" Augeas elements sequential_lens => [/AcceptEnv AllowGroups/], }, ], Sequential lens Some configuration files feature data that must be written as list or as hash. Depending on the syntax, Augeas list or hash lenses can be written so that new "container" nodes are required for each new element. For instance, "HostKey" lines can be repeated several times in "sshd_config". Since Augeas must keep track of these several lines, Augeas tree will be written like: /files/etc/ssh/sshd_config/HostKey[1] /files/etc/ssh/sshd_config/HostKey[2] /files/etc/ssh/sshd_config/HostKey[3] and not: /files/etc/ssh/sshd_config/HostKey/1 /files/etc/ssh/sshd_config/HostKey/2 /files/etc/ssh/sshd_config/HostKey/3 The "HostKey" node is created several times. A new hostkey must be added with the following syntax: /files/etc/ssh/sshd_config/HostKey[4] and not: /files/etc/ssh/sshd_config/HostKey/4 So the "HostKey" lens is sequential. The situation is more complex when syntax allow repeated values on several lines. Like: AcceptEnv LC_PAPER LC_NAME LC_ADDRESS AcceptEnv LC_IDENTIFICATION LC_ALL Augeas will have this tree: /files/etc/ssh/sshd_config/AcceptEnv[1]/1 /files/etc/ssh/sshd_config/AcceptEnv[1]/2 /files/etc/ssh/sshd_config/AcceptEnv[1]/3 /files/etc/ssh/sshd_config/AcceptEnv[2]/4 /files/etc/ssh/sshd_config/AcceptEnv[2]/5 Note that the first index between squarekeeps track of how are grouped the "AcceptEnv" data, but the real list index is after the slash. Augeas does not require new elements to create "AcceptEnv[3]". A new element can be added as : /files/etc/ssh/sshd_config/AcceptEnv[2]/6 So this lens is not sequential. The same kind of trouble occurs with hash elements. Some hashes tree are like: /files/etc/foo/my_hash/my_key1 /files/etc/foo/my_hash/my_key2 Others are like: /files/etc/foo/my_hash[1]/my_key1 /files/etc/foo/my_hash[2]/my_key2 Note that a list-like index is used with the hash key. This also depends on the syntax of the configuration file. For instance, "Subsystem" in "sshd_config" can be : Subsystem sftp /usr/lib/openssh/sftp-server Subsystem fooftp /usr/lib/openssh/fooftp-server Subsystem barftp /usr/lib/openssh/barftp-server This (unvalid) sshd configuration is represented by: /files/etc/ssh/sshd_config/Subsystem[1]/sftp /files/etc/ssh/sshd_config/Subsystem[2]/fooftp /files/etc/ssh/sshd_config/Subsystem[3]/barftp Any new Subsystem must be added with: /files/etc/ssh/sshd_config/Subsystem[4]/bazftp In this case, the hash is also sequential. For these examples, the augeas backend declaration must feature: sequential_lens => [qw/HostKey Subsystem/], Augeas backend limitation The structure and element names of the Config::Model tree must match the structure defined in Augeas lenses. I.e. the order of the element declared in Config::Model must match the order required by Augeas lenses. Sometimes, the structure of a file loaded by Augeas starts directly with a list of items. For instance "/etc/hosts" structure starts with a list of lines that specify hosts and IP addresses. The "set_in" parameter specifies an element name in Config::Model root class that will hold the configuration data retrieved by Augeas. Log and trace This module use Log::Log4perl to log debug and info trace with "Data::Read" and "Data::Write" categories. CAVEATS
o Augeas "#comment" nodes are ignored SEE ALSO
o http://augeas.net/ : Augeas project page o Config::Model o Augeas mailing list: http://augeas.net/developers.html o Config::Model mailing list : http://sourceforge.net/mail/?group_id=155650 AUTHOR
Dominique Dumont, <ddumont at cpan dot org@<gt> COPYRIGHT
Copyright (C) 2008-2010 by Dominique Dumont LICENSE
This library is free software; you can redistribute it and/or modify it under the LGPL terms. perl v5.14.2 2012-07-10 Config::Model::Backend::Augeas(3pm)
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