view release on metacpan or  search on metacpan

lib/App/tldr.pm  view on Meta::CPAN

package App::tldr 0.21;
use v5.16;
use warnings;

use Encode ();
use File::Spec;
use File::Which ();
use Getopt::Long ();
use HTTP::Tiny;
use IO::Socket::SSL;
use Pod::Usage ();
use Term::ReadKey ();
use Text::Fold ();

use constant DEBUG => !!$ENV{TLDR_DEBUG};
use constant REPOSITORY => $ENV{TLDR_REPOSITORY} // '';

my $URL = "https://raw.githubusercontent.com/tldr-pages/tldr/main/pages%s/%s/%s.md";

sub new {
    my ($class, %option) = @_;
    my $http = HTTP::Tiny->new(verify_SSL => 1);
    bless { http => $http, %option }, $class;
}

sub parse_options {
    my ($self, @argv) = @_;
    $self->{platform} = [];

    $self->{unicode} = ($ENV{LANG} || "") =~ /UTF-8/i ? 1 : 0;
    my $parser = Getopt::Long::Parser->new(
        config => [qw(no_auto_abbrev no_ignore_case)],
    );
    $parser->getoptionsfromarray(
        \@argv,
        "h|help"       => sub { print $self->_help; exit },
        "l|language=s" => \my $language,
        "o|os=s@"      => \($self->{platform}),
        "v|version"    => sub { printf "%s %s\n", ref $self, $self->VERSION; exit },
        "pager=s"      => \my $pager,
        "no-pager"     => \my $no_pager,
        "unicode!"     => \$self->{unicode},
    ) or exit(2);
    $self->{argv} = \@argv;
    if ($language) {
        $language = $language =~ /^\./ ? $language : ".$language";
    }
    $self->{language} = $language || '';
    if (!$no_pager and -t STDOUT and my $guess = $self->_guess_pager($pager)) {
        $self->{pager} = $guess;
    }
    push @{$self->{platform}}, $self->_guess_platform, "common";
    $self;
}

sub _guess_pager {
    my $self = shift;

    my $cmd;
    for my $try (grep $_, @_, $ENV{PAGER}, "less", "more") {
        if (my $found = File::Which::which($try)) {
            $cmd = $found, last;
        }
    }
    return if !$cmd;
    [$cmd, $cmd =~ /\bless$/ ? "-R" : ()];
}

sub _help {
    my ($self, $exit) = @_;
    open my $fh, '>', \my $out;
    Pod::Usage::pod2usage
        exitval => 'noexit',
        input => $0,
        output => $fh,
        sections => 'SYNOPSIS',
        verbose => 99,
    ;
    $out =~ s/^Usage:\n//;
    $out =~ s/^[ ]{6}//mg;
    $out =~ s/\n$//;
    $out;
}


# XXX
sub _guess_platform {
    $^O =~ /darwin/i ? "osx"   :
    $^O =~ /linux/i  ? "linux" :
    $^O =~ /sunos/i  ? "sunos" : ();
}

sub _get {
    my $self = shift;
    if (REPOSITORY) {
        $self->_local_get(@_);
    } else {
        $self->_http_get(@_);
    }
}

sub _http_get {
    my ($self, $query, $platform) = @_;
    my $url = sprintf $URL, $self->{language}, $platform, $query;
    my $res = $self->{http}->get($url);
    if ($res->{success}) {
        (Encode::decode_utf8($res->{content}), undef);
    } else {
        my $err = "$res->{status} $res->{reason}";
        if ($res->{status} == 599) {
            $err .= ", $res->{content}";
        }
        (undef, "$url: $err");
    }
}

sub _local_get {
    my ($self, $query, $platform) = @_;
    my $file = File::Spec->catfile(REPOSITORY, "pages$self->{language}", $platform, "$query.md");
    if (-f $file) {
        open my $fh, "<:utf8", $file or die "$file: $!";
        local $/;
        (<$fh>, undef);
    } else {
        (undef, "Missing $file");
    }
}

sub run {
    my $self = shift;
    my $arg  = shift @{$self->{argv}} or die $self->_help(1);
    my $content;
    for my $platform (@{ $self->{platform} }) {
        ($content, my $err) = $self->_get($arg, $platform);
        if ($content) {
            last;
        } elsif (DEBUG) {
            warn "-> $err\n";
        }
    }
    die "Couldn't find tldr for '$arg'\n" unless $content;
    $self->_render($content, $arg);
}

my $CHECK = "\N{U+2713}";
my $SUSHI = "\N{U+1F363}";