2022-04-27 Update:
While the git.io url redirection service is read-only and use of the service is limited, we have received feedback from developers and academic researchers who have published git.io links in print documentation and research papers. In order to preserve the integrity of these historical documents, we have decided to archive the current git.io links in a new read-only service that will allow us to serve redirects for those links longer term.
As we continue our analysis, we may remove individual links that point to spammy, malicious or 404 links. Our goal is to not break links relied on for legitimate use, especially by the academic community, while preserving the security of developers on GitHub.
That said, we still encourage users to make use of one of the many URL shortening services available with greater functionality than the git.io service provided. GitHub support will not be able to update or edit redirection records served by the git.io archive service.
curl https://raw.githubusercontent.com/oalders/presentations/main/slides/6-perlimports/remark.html -o perlimports.html && open perlimports.html
「Where Did That Symbol Come From?」とトークタイトルが示す通り、Perlのシンボルがどこからimportされたかを明確にしたいというのが実装の動機になっているようです。合わせて動き自体はgolangでimportしているモジュールをいい感じに管理してくれるgoimportsを参考にしているようです。
#!/usr/bin/env perluse strict;
use warnings;
print"hello";
use Hoge;
❯ perl hoge.pl
Can't locate Hoge.pm in @INC (you may need to install the Hoge module) (@INC contains: /Users/anatofuz/.plenv/versions/5.32.0/lib/perl5/site_perl/5.32.0/darwin-2level /Users/anatofuz/.plenv/versions/5.32.0/lib/perl5/site_perl/5.32.0 /Users/anatofuz/.plenv/versions/5.32.0/lib/perl5/5.32.0/darwin-2level /Users/anatofuz/.plenv/versions/5.32.0/lib/perl5/5.32.0) at hoge.pl line 2.BEGIN failed--compilation aborted at hoge.pl line 2.
package Hoge::First;
use strict;
use warnings;
use featureqw/say/;
use Exporter 'import';
our@EXPORT = (qw/hoge/); #サブルーチンの名前を文字列で配列の中にいれるとEXPORTされるsub hoge {
say'this is first!';
}
1;
package Hoge::First;
use strict;
use warnings;
use featureqw/say/;
use Exporter 'import';
our@EXPORT = (qw/hoge/);
sub hoge {
say'this is first!';
}
1;
package Hoge::Second;
use strict;
use warnings;
use featureqw/say/;
use Exporter 'import';
our@EXPORT = (qw/hoge/);
sub hoge {
say'this is second!';
}
1;
#!/usr/bin/env perl# main.pluse strict;
use warnings;
use Hoge::First;
use Hoge::Second;
hoge();
❯ perl -Ilib hoge.pl
f1
Undefined subroutine &main::f2 called at hoge.pl line 10.
これをApp::perlimportsに通すと、以下のようにコードが書き換わります。
❯ perlimports --libs lib hoge.pl
use strict;
use warnings;
use MyPkg::One qw( f1 );
use MyPkg::Two qw( f2 );
use MyPkg::Three ();
use MyPkg::Four ();
f1();
f2();
MyPkg::Three->f3();
❯ perlimports --libs lib --no-preserve-unused hoge.pl
use strict;
use warnings;
use MyPkg::One qw( f1 );
use MyPkg::Two qw( f2 );
use MyPkg::Three ();
f1();
f2();
MyPkg::Three->f3();
❯ cat hoge.pl
use strict;
use warnings;
use FindBin;
use lib "$FindBin::Bin/lib";
use DDP {deparse =>1, hash_max =>0};
f1();
~/workspace/test3 via 🐪 v5.34.0
❯ perlimports --libs lib -f hoge.pl
use strict;
use warnings;
use FindBin ();
use lib "$FindBin::Bin/lib";
use DDP {deparse =>1, hash_max =>0};
f1();
❯ cat hoge.pl
use strict;
use warnings;
use FindBin;
use lib "$FindBin::Bin/lib";
use DDP {deparse =>1, hash_max =>0};
use Class::Accessor::Lite (
rw => [qw/ hoge/],
);
f1();
~/workspace/test3 via 🐪 v5.34.0
❯ perlimports --libs lib,local/lib/perl5 -f hoge.pl
use strict;
use warnings;
use FindBin ();
use lib "$FindBin::Bin/lib";
use DDP {deparse =>1, hash_max =>0};
use Class::Accessor::Lite ();
f1();
~/workspace/test3 via 🐪 v5.34.0
❯ cat hoge.pl
use strict;
use warnings;
use FindBin;
use lib "$FindBin::Bin/lib";
use DDP {deparse =>1, hash_max =>0};
use Class::Accessor::Lite (
rw => [qw/ hoge/],
);
f1();
~/workspace/test3 via 🐪 v5.34.0
❯ perlimports --libs lib,local/lib/perl5 --ignore-modules-pattern '^Class::' -f hoge.pl
use strict;
use warnings;
use FindBin ();
use lib "$FindBin::Bin/lib";
use DDP {deparse =>1, hash_max =>0};
use Class::Accessor::Lite (
rw => [qw/ hoge/],
);
f1();
❯ perl Makefile.PL
Checking if your kit is complete...
Looks good
Generating a Unix-style Makefile
Writing Makefile for List::Util
Writing MYMETA.yml and MYMETA.json
❯ /usr/bin/perl neko.pl
Can't load '/Users/anatofuz/src/github.com/Dual-Life/Scalar-List-Utils/blib/arch/auto/List/Util/Util.bundle' for module List::Util: dlopen(/Users/anatofuz/src/github.com/Dual-Life/Scalar-List-Utils/blib/arch/auto/List/Util/Util.bundle, 0x0001): symbol '_PL_DBsub' not found, expected in flat namespace by '/Users/anatofuz/src/github.com/Dual-Life/Scalar-List-Utils/blib/arch/auto/List/Util/Util.bundle' at /System/Library/Perl/5.30/darwin-thread-multi-2level/DynaLoader.pm line 197.
at neko.pl line 4.
Compilation failed in require at neko.pl line 4.
BEGIN failed--compilation aborted at neko.pl line 4.
id:k-murakami0609
id:anatofuz
id:shoichikaji
id:deflis55
id:papix
id:mp0liiu