use Zef:ver($?DISTRIBUTION.meta<version> // $?DISTRIBUTION.meta<ver>// '*'):api($?DISTRIBUTION.meta<api> // '*'):auth($?DISTRIBUTION.meta<auth> // '');

class Zef::Service::Shell::wget does Fetcher does Probeable {

    

=subtitle A wget based implementation of the Fetcher interface


head

code

    =begin code :lang<raku>

        use Zef;
        use Zef::Service::Shell::wget;

        my $wget = Zef::Service::Shell::wget.new;

        my $source   = "https://raw.githubusercontent.com/ugexe/zef/main/META6.json";
        my $save-to  = $*TMPDIR.child("zef-meta6.json");
        my $saved-to = $wget.fetch($source, $save-to);

        die "Something went wrong" unless $saved-to;
        say "Zef META6 from HEAD: ";
        say $saved-to.slurp;

    =end code


C<Fetcher> class for handling http based URIs using the C<wget> command.


You probably never want to use this unless its indirectly through C<Zef::Fetch>;
    handling files and spawning processes will generally be easier using core language functionality. This
    class exists to provide the means for fetching a file using the C<Fetcher> interfaces that the e.g. git/file
    adapters use.


Returns C<True> if this module can successfully launch the C<wget> command.


method fetch-matcher(Str() $uri --> Bool:D) 


Returns C<True> if this module knows how to fetch C<$uri>, which it decides based on if C<$uri>
    starts with C<http> or C<https>.


method fetch(Str() $uri, IO() $save-as, Supplier :$stdout, Supplier :$stderr --> IO::Path)


Fetches the given C<$uri>, saving it to C<$save-to>. A C<Supplier> can be supplied as C<:$stdout> and
    C<:$stderr> to receive any output.


On success it returns the C<IO::Path> where the data was actually saved to. On failure it returns C<Nil>.



    my Str $command-cache;
    my Lock $command-lock = Lock.new;

    method !command {
        $command-lock.protect: {
            return $command-cache if $command-cache.defined;
            if BEGIN { $*DISTRO.is-win } && try so Zef::zrun('curl.exe', '--help', :!out, :!err) {
                # When running under powershell we don't want to use the curl Invoke-WebRequest
                # alias so explicitly add the .exe
                return $command-cache = 'wget.exe';
            }
            return $command-cache = 'wget';
        }
    }

    my Lock $probe-lock = Lock.new;
    my Bool $probe-cache;

    #| Return true if the `curl` command is available to use
    method probe(--> Bool:D) {
        $probe-lock.protect: {
            return $probe-cache if $probe-cache.defined;
            my $command = self!command();
            my $probe is default(False) = try so Zef::zrun($command, '--help', :!out, :!err);
            return $probe-cache = $probe;
        }
    }

    #| Return true if this Fetcher understands the given uri/path
    method fetch-matcher(Str() $uri --> Bool:D) {
        return so <https http>.first({ $uri.lc.starts-with($_) });
    }

    #| Fetch the given url
    method fetch(Str() $uri, IO() $save-as, Supplier :$stdout, Supplier :$stderr --> IO::Path) {
        die "target download directory {$save-as.parent} does not exist and could not be created"
            unless $save-as.parent.d || mkdir($save-as.parent);

        my $passed;
        react {
            my $cwd := $save-as.parent;
            my $ENV := %*ENV;
            my $cmd := self!command();
            my $proc = Zef::zrun-async($cmd, '-P', $cwd, '--quiet', $uri, '-O', $save-as.absolute);
            whenever $proc.stdout(:bin) { }
            whenever $proc.stderr(:bin) { }
            whenever $proc.start(:$ENV, :$cwd) { $passed = $_.so }
        }

        return ($passed && $save-as.e) ?? $save-as !! Nil;
    }
}


root

unzip

React

=begin React :component<HeaderCol> :id<menu> 
=para L<Documentation|/doc/introduction>
=para L<Modules| /mods>
=para L<Examples| file:../examples/index.podlite>
=para L<Download |file:../download/index.podlite>
=para L<About|file:../about/index.podlite>
=para 🔍 K<⌘K>/K<ctrl-K>
=end React


=begin React :component<HeaderCol> :id<footer>  
=begin nested :!nested
=item1 B<Language>
    =item2 L<Get started|file:../getting-started/getting-started.podlite>
    =item2 L<Why Raku?|/doc/language/faq#Why-should-I-learn-Raku-What's-so-great-about-it>
    =item2 L<Try Raku|https://glot.io/new/raku>
    =item2 L<Raku cheat sheet|https://github.com/Raku/mu/blob/master/docs/Perl6/Cheatsheet/cheatsheet.txt>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<Raku on Exercism|https://exercism.org/tracks/raku>
    =item2 L<Wikipedia|https://en.wikipedia.org/wiki/Raku_(programming_language)>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
=begin nested :!nested

=item1 B<L<Documentation|/doc>>
    =item2 L<Getting started, Migration guides from other languages, & Tutorials | file:../doc/introduction.podlite>
    =item2 L<Language References|file:../doc/reference.podlite>
    =item2 L<Type Reference| file:../doc/types.podlite>
    =item2 L<Miscellaneous| file:../doc/miscellaneous.podlite>
    =item2 L<FAQs (Frequently Asked Questions)|/doc/language/faq>
    =item2 L<Community|/doc/language/community>
    =item2 L<The list of all documents|file:../doc/index.podlite>

=item1 B<Resources>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>

=end nested
=begin nested :!nested

=item1 B<Resoures>
    =item2 L<Download | file:../download/index.podlite>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=item1 B<Learning>
    =item2 L<The Raku Guide|https://raku.guide/>
    =item2 L<Wikibook |https://en.wikibooks.org/wiki/Raku_Programming>
    =item2 L<Books |https://perl6book.com/>
    =item2 L<Rosetta Code | https://www.raku.org/community/rosettacode>
    =item2 L<Learn Raku in Y minutes|https://learnxinyminutes.com/docs/raku/>
    =item2 L<Golfing |https://github.com/AlexDaniel/raku-golf-cheatsheet>
=end nested
=begin nested :!nested

=item1 B<Explore>
    =item2 L<Raku Blog Aggregator|https://planet.raku.org/>
    =item2 L<Rakudo Weekly|https://rakudoweekly.blog/>
    =item2 L<The Weekly Challenge |https://perlweeklychallenge.org/>
    =item2 L<Raku Advent Calendar|https://raku-advent.blog/>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>
    =item2 L<empty|#>

=end nested
=end React


=begin React :component<CookieConsent> :id<CookieConsent> :buttonCaption("Got it!")
=para
This website uses cookies for analytics.
=end React


wget

Synopsis

Description

Methods

method probe

method fetch-matcher

method fetch