Quick Navigator

Search Site

Unix VPS
A - Starter
B - Basic
C - Preferred
D - Commercial
MPS - Dedicated
Previous VPSs
* Sign Up! *

Contact Us
Online Help
Domain Status
Man Pages

Virtual Servers

Topology Map

Server Agreement
Year 2038

USA Flag



Man Pages
MooX::ConfigFromFile::Role::SortedByFilename(3) User Contributed Perl Documentation MooX::ConfigFromFile::Role::SortedByFilename(3)

MooX::ConfigFromFile::Role::SortedByFilename - allows filename based sort algorithm for multiple config files

  package MyApp::Cmd::TPau;
  use DBI;
  use Moo;
  use MooX::Cmd with_configfromfile => 1;
  with "MooX::ConfigFromFile::Role::SortedByFilename";
  with "MooX::ConfigFromFile::Role::HashMergeLoaded";
  # ensure hashes are merged by top-most scalar wins
  around _build_config_merge_behavior => sub { 'RIGHT_PRECEDENT' };
  has csv => (is => "ro", required => 1);
  sub execute
      my $self = shift;
      DBI->connect("DBI::csv:", undef, undef, $self->csv);
  $ cat etc/myapp.json
    "csv": {
      "f_ext": ".csv/r",
      "f_dir": "data"
      "csv_sep_char": ";",
      "csv_class": "Text::CSV_XS"
  $cat etc/myapp-tpau.json
    "csv": {
      "f_dir": "data/tpau"

This is an additional role for MooX::ConfigFromFile to allow merging loaded configurations in a more predictable order: filename > extension > path. (Read: When the filename is identical, the extensions are compared, when they are identical, the locations are compared).
While filename and file extension are compared on character basis, the sort order of the file locations (path) is based on precedence in MooX::File::ConfigDir or File::ConfigDir, respectively. This order is defined internally in @File::ConfigDir::extensible_bases.

This role modifies the builder for sorted_loaded_config by sorting the loaded files from raw_loaded_config by filename, extension and location in the filesystem, respectively.
Let's assume the affected setup has a CLI interface named "oper" with sub commands like "git" provides them, too. And the company using the application does it well by defining staging environments like "DEV" (Development), "TEST" (Testing), "INT" (Integration) and "PROD" (Production). For the example, the sub commands shall be "deploy" and "report".
This will give you possible "config_prefix_map"s of
  # main command
  ['oper', 'dev']
  ['oper', 'test']
  ['oper', 'int']
  ['oper', 'prod']
  # deploy sub-command
  ['oper', 'deploy']
  ['oper', 'deploy', 'dev']
  ['oper', 'deploy', 'test']
  ['oper', 'deploy', 'int']
  ['oper', 'deploy', 'prod']
  # report sub-command
  ['oper', 'report']
  ['oper', 'report', 'dev']
  ['oper', 'report', 'test']
  ['oper', 'report', 'int']
  ['oper', 'report', 'prod']
This will result in (let's further assume, developers prefer "JSON", operators prefer "YAML") following possible config filenames:
    # main command
    # deploy sub-command
    # report sub-command
For a particular invoking ("oper report" in "int" stage) following files exists:
    '/etc/oper.json',                 # global configuration by developers
    '/etc/oper.yaml',                 # global configuration by operating policy
    '/opt/ctrl/etc/oper.json',        # vendor configuration by developers
    '/opt/ctrl/etc/oper.yaml',        # vendor configuration by operating policy
    '/opt/ctrl/etc/oper-int.yaml',    # vendor configuration by stage operating policy
    '/opt/ctrl/etc/oper-report.yaml', # vendor configuration by report operating team
    '/home/usr4711/oper-report.yaml', # usr4711 individual configuration (e.g. for template adoption)
The default sort algorithm will deliver
This role will change the sort algorithm to deliver
Which will cause that all policy configuration will override the developer defaults and user configuration override policy settings.

Jens Rehsack, "<rehsack at>"

Copyright 2018 Jens Rehsack.
This program is free software; you can redistribute it and/or modify it under the terms of either: the GNU General Public License as published by the Free Software Foundation; or the Artistic License.
See <> for more information.
2018-05-01 perl v5.28.1

Search for    or go to Top of page |  Section 3 |  Main Index

Powered by GSP Visit the GSP FreeBSD Man Page Interface.
Output converted with ManDoc.