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如何以编程方式告诉我是否安装了Perl 6模块?

我正在玩一个可以加载可用内容的插件.关于它的文档$*REPO并不完全存在,所以我猜了一下.这似乎有效,但我感觉我错过了一些更简单的东西(除了常规打高尔夫球的其他位):

my @modules = <Digest::MD5 NotThere PrettyDump>;
my @installed = gather installed-modules( @modules );

put "Already installed: @installed[]";
try require ::( @installed[0] );

# is there a better way to do this without eval
my $digest = ::( @installed[0] ).new;

sub installed-modules ( *@candidates ) {
    for @candidates -> $module {
        put $module, '-' x 15;
        my $ds = CompUnit::DependencySpecification.new:
            :short-name($module);
        if $*REPO.resolve: $ds {
            put "Found $module";
            take $module;
            }
        else {
            put "Didn't find $module";
            } …
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module perl6

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