File: Templates.pod

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=pod

=head1 NAME

Templates for uscan.

=head1 DESCRIPTION

This document explain how to build a template for L<uscan(1)>.

=head1 FORMAT OF THE TEMPLATE

A L<uscan(1)> template is a Perl class with the following rules:

=over

=item * It must be in B<Devscripts::Uscan::Templates::> namespace

=item * Its name must start by an uppercase character and others must
be in lowercase

=item * It must implement a function named B<transform>

=back

Example: C<Devscripts::Uscan::Templates::Github>

=head1 THE C<transform> FUNCTION

=over

=item * It receives a single argument I<(C<$watchSource>)>

=item * It must return the same type of object modified

=item * It should clean its specific keys

=item * It should not override parameters explicitly defined in B<debian/watch>

=back

=head2 Example

Object received by B<transform>:

  {
    template => 'GitHub'
    project  => 'simple-oidc-client',
    author   => 'linagora',

    version  => 5,
    _raw     => 'Template: GitHub
  Owner: linagora
  Project: simple-oidc-client
  Version-Mangle: auto
  ',
  }

Object returned by B<Devscripts::Uscan::Templates::Github>:

  {
    source            => 'https://api.github.com/repos/linagora/simple-oidc-client/git/matching-refs/tags/',
    matchingpattern   => 'https://api.github.com/repos/[^/]+/[^/]+/git/refs/tags/(?:[^/]+\\-)?@ANY_VERSION@',
    searchmode        => 'plain',
    downloadurlmangle => 's%(api.github.com/repos/[^/]+/[^/]+)/git/refs/%$1/tarball/refs/%g',
    filenamemangle    => 's%.*/(?:[^/]+\\-)?@ANY_VERSION@%@PACKAGE@-$1.tar.gz%',
    gpgmode           => 'none',
    versionmangle     => 'auto',

    version => 5,
    _raw    => 'Template: GitHub
  Owner: linagora
  Project: simple-oidc-client
  Version-Mangle: auto
  '
  }

=head1 USE TEMPLATE WHEN UPDATING WATCHFILE

When B<uscan --update-watch> is used, it can detect if a template can be used.
To insert a template into this behavior, you must add an entry into the
C<@templates> variable inside B<lib/Devscripts/Uscan/Version4.pm>.

Each entry is a reference to an array with 2 entries:

=over

=item * a regular expression compiled with C<qr#...#>

=item * a reference to a function

This function receives a hash reference that contains the field of a
B<watchsource> I<(a line in version 4)> and must return this reference
modified or not. See B<Metacpan> and B<Github> examples in this file.

=back

=cut