1Mojo::Loader(3)       User Contributed Perl Documentation      Mojo::Loader(3)
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NAME

6       Mojo::Loader - Load all kinds of things
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SYNOPSIS

9         use Mojo::Loader qw(data_section find_modules load_class);
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11         # Find modules in a namespace
12         for my $module (find_modules 'Some::Namespace') {
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14           # Load them safely
15           my $e = load_class $module;
16           warn qq{Loading "$module" failed: $e} and next if ref $e;
17
18           # And extract files from the DATA section
19           say data_section($module, 'some_file.txt');
20         }
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DESCRIPTION

23       Mojo::Loader is a class loader and plugin framework. Aside from finding
24       modules and loading classes, it allows multiple files to be stored in
25       the "DATA" section of a class, which can then be accessed individually.
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27         package Foo;
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29         1;
30         __DATA__
31
32         @@ test.txt
33         This is the first file.
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35         @@ test2.html (base64)
36         VGhpcyBpcyB0aGUgc2Vjb25kIGZpbGUu
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38         @@ test
39         This is the
40         third file.
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42       Each file has a header starting with "@@", followed by the file name
43       and optional instructions for decoding its content. Currently only the
44       Base64 encoding is supported, which can be quite convenient for the
45       storage of binary data.
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FUNCTIONS

48       Mojo::Loader implements the following functions, which can be imported
49       individually.
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51   data_section
52         my $all   = data_section 'Foo::Bar';
53         my $index = data_section 'Foo::Bar', 'index.html';
54
55       Extract embedded file from the "DATA" section of a class, all files
56       will be cached once they have been accessed for the first time.
57
58         # List embedded files
59         say for keys %{data_section 'Foo::Bar'};
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61   file_is_binary
62         my $bool = file_is_binary 'Foo::Bar', 'test.png';
63
64       Check if embedded file from the "DATA" section of a class was Base64
65       encoded.
66
67   find_packages
68         my @pkgs = find_packages 'MyApp::Namespace';
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70       Search for packages in a namespace non-recursively.
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72   find_modules
73         my @modules = find_modules 'MyApp::Namespace';
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75       Search for modules in a namespace non-recursively.
76
77   load_class
78         my $e = load_class 'Foo::Bar';
79
80       Load a class and catch exceptions, returns a false value if loading was
81       successful, a true value if the class was not found, or a
82       Mojo::Exception object if loading failed. Note that classes are checked
83       for a "new" method to see if they are already loaded, so trying to load
84       the same class multiple times may yield different results.
85
86         # Handle exceptions
87         if (my $e = load_class 'Foo::Bar') {
88           die ref $e ? "Exception: $e" : 'Not found!';
89         }
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SEE ALSO

92       Mojolicious, Mojolicious::Guides, <https://mojolicious.org>.
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96perl v5.32.0                      2020-07-28                   Mojo::Loader(3)
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