モダンPerlリファクタリング #yapcasia

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Ϟμϯ1FSMϦϑΝΫλϦϯά !OBPZB@JUP

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.BSLEPXO5P*OBP NEJOBP

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# Hello, World * list 1 * list 2 ■Hello, World ・list 1 ・list 2

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ߏ଄తʹػೳΛ͚ͭՃ͑ʹ͍͘ϓϩ άϥϜʹ৽نػೳΛ௥Ճ͠ͳ͚Ε͹ͳ Βͳ͍৔߹ʹ͸ɺ·ͣػೳ௥Ճ͕؆୯ ʹͳΔΑ͏ʹϦϑΝΫλϦϯάΛͯ͠ ͔Β௥ՃΛߦ͏͜ͱɻ 1 ʰϦϑΝΫλϦϯάϓϩάϥϛϯάͷମ࣭վળςΫχοΫʱ ϚʔνϯɾϑΝ΢ϥʔ

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"'5&3 package Text::Md2Inao::Builder::Inao; use parent qw/Text::Md2Inao::Builder/; use Text::Md2Inao::Builder::DSL; case default => sub { my ($c, $h) = @_; fallback_to_html($h); }; case a => sub { my ($c, $h) = @_; my $url = $h-‐>attr('href'); my $title = $h-‐>as_trimmed_text; if ($url and $title) { return sprintf "%s◆注/◆%s◆/注◆", $title, $url; } else { return fallback_to_html($h); } }; ...

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લఏ

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ಓ۩ •  $BSUPODQBOpMF •  (JUIVC •  ςετ •  $*ɺ(VBSE

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ϦϑΝΫλϦϯάͷྲྀΕ •  Լ४උ –  σΟϨΫτϦΛ੔͑ͯ(JUIVCʹ –  $1"/Ϟδϡʔϧચ͍ग़͠ •  શମΛϞδϡʔϧԽͯ͠"1*ఆٛ •  &OEUP&OEͷςετ •  ҎԼ܁Γฦ͠ –  ࡉ͔͍ςετ –  ϦϑΝΫλϦϯά •  ճؼςετΛཷΊΔ

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Լ४උ

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σΟϨΫτϦΛ੔͑ͯ(JUIVC΁ •  $1"/Ϟδϡʔϧͱಉ͡σΟϨΫτϦϨΠ Ξ΢τʹ͢Δ – ֤छπʔϧͷԸܙʹ༩Δ •  QSPWFɺ$BSUPOɺ(VBSEɺ5SBWJT$*

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$1"/Ϟδϡʔϧચ͍ग़͠ •  $BSUPODQBOpMF •  ΑΓϙʔλϒϧʹ # cpanfile requires 'Text::Markdown'; requires 'HTML::TreeBuilder'; requires 'Unicode::EastAsianWidth'; requires 'Pod::Usage'; ...

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DBSUPOFYFD % carton install % carton exec perl bin/md2inao.pl •  ϥΠϒϥϦΛϩʔΧϧύεલఏʹ ີ෧ػೳ –  ʮଞͰೖΕͨϞδϡʔϧͰಈ͍ͯͨʯΛճආ •  ґଘϞδϡʔϧͷόʔδϣϯΛݫີʹݻఆ DBSUPOFYFD͠ͳ͕Β଍Γͳ͍ϞδϡʔϧΛ DQBOpMFʹ௥ه˰͋ΒෆࢥٞɺϞδϡʔϧҰཡ ͷͰ͖͕͋Γ

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͍͟ϦϑΝΫλϦϯά

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શମΛͻͱͭͷϞδϡʔϧʹ my $inao = Text::Md2Inao-‐>new({ default_list => 'disc', max_list_length => 63, max_inline_list_length => 55, }); print $inao-‐>parse($markdown)

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package Text::Md2Inao; sub parse { my $markdown = shift; ... return $inao; } ·ͣ͸ͬ͘͟Γ෴͏

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ςετ͕ॻ͚Δ use Test::More; my $inao = Text::Md2Inao-‐>new my $out = $inao-‐>parse("# Hello, World"); is $out, "■Hello, World"; done_testing;

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% carton exec -‐Ilib -‐-‐ prove t/01_api.t t/01_api.t .. ok All tests successful. Files=1, Tests=1, 0 wallclock secs ( 0.02 usr 0.00 sys + 0.09 cusr 0.00 csys = 0.11 CPU) Result: PASS

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ϦϑΝΫλϦϯάΛ։࢝͢Δͱ͖ɺ ࠷ॳʹ͢Δ͜ͱ͸ৗʹಉ͡Ͱ͢ɻର৅ ͱͳΔίʔυʹ͍͖ͭͯͪΜͱͨ͠ς ετ܈Λ࡞Γ্͛Δ͜ͱͰ͢ 1 ʰϦϑΝΫλϦϯάϓϩάϥϛϯάͷମ࣭վળςΫχοΫʱ ϚʔνϯɾϑΝ΢ϥʔ

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جຊઓུ •  ࣮ߦ؀ڥͱΞϓϦέʔγϣϯΛ෼཭͢Δ – $6*ͳΒ45%*/45%065ͷ*0 – 8FCΞϓϦͳΒ)551αʔόʔ •  ෼཭ͨ͠ΞϓϦέʔγϣϯଆͷҰ൪େ͖ ͳ"1*ͷςετΛॻ͘ – ͜Ε͕&OEUP&OEͷςετ

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&OEUP&OEͷςετ͔Β࢝ΊΔ •  ·ͣ͸֎ଆͷʮৼΔ෣͍ʯΛอূ – ͦͷͨΊͷ֎෦"1*ͬ͘͟ΓϞδϡʔϧԽ

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ϦϑΝΫλϦϯά ໊ࢺ ֎෦͔Β ݟͨͱ͖ͷৼΔ෣͍Λอͪͭͭɺཧղ ΍मਖ਼͕؆୯ʹͳΔΑ͏ʹɺιϑτ ΢ΣΞͷ಺෦ߏ଄ΛมԽͤ͞Δ͜ ͱɻ 1 ʰϦϑΝΫλϦϯάϓϩάϥϛϯάͷମ࣭վળςΫχοΫʱ ϚʔνϯɾϑΝ΢ϥʔ

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NEJOBPͰ͸5FTU#BTF use Test::Base; use Text::Md2Inao; plan tests => 1 * blocks; run_is in => 'expected'; sub md2inao { Text::Md2Inao-‐>new-‐>parse($_) } __END__ === -‐-‐-‐ in md2inao # 見出し1(大見出し、節) -‐-‐-‐ expected ■見出し1(大見出し、節) === -‐-‐-‐ in md2inao ## 見出し2(中見出し、項) -‐-‐-‐ expected ■■見出し2(中見出し、項)

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8FCΞϓϦέʔγϣϯͷ৔߹ •  1MBDLԽͯ͠1MBDL5FTUͳͲ use Test::More; use Plack::Test; ... # $app : PSGI application test_psgi $app, sub { like shift-‐>(GET "/amazlet/")-‐>content, qr// };

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$(*ͳΜͰ͚͢Ͳŋŋŋ •  1MBDL"QQ8SBQ$(*Ͱ1MBDLԽ͢Δ use Plack::Builder; use Plack::App::WrapCGI; builder { mount "/cgi-‐bin/amazlet.cgi" => Plack::App::WrapCGI-‐>new( script => './htdocs/amazlet.cgi', execute => 1 )-‐>to_app; };

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࣮ߦ؀ڥ͕ີ݁߹ͨ͠ ಠࣗ'8ͳΜͰ͚͢Ͳŋŋŋ •  IFBEMFTTϒϥ΢βͰ&&ςετ͢Δ – DBQZCBSBXFCLJUIFBEMFTTͱ͔ – ͦͷޙɺ1MBDLԽͯ͠'8Λ෼཭ 3VCZ͚ͩͲͳ

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͋ͱ͸ɺҎԼ܁Γฦ͠ •  ΑΓཻ౓ͷࡉ͔͍ςετΛ௥Ճ – ࡉ͔͍σʔλͰͷ&OEUP&OE – ಺෦ϞδϡʔϧͷϢχοτςετ •  ϦϑΝΫλϦϯάΛਐΊΔ ςετ͑͋͞Ε͹ɺͲΜͳʹϨΨ γʔͰ΋ϦϑΝΫλϦϯά͸೉͘͠ ͳ͍ɻ

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όάϨϙʔτΛड͚औͬͨΒɺ·ͣ ͦͷόάΛ໌Β͔ʹ͢ΔͨΊͷ୯ମς ετΛॻ͚ɻ 1 ʰϦϑΝΫλϦϯάϓϩάϥϛϯάͷମ࣭վળςΫχοΫʱ ϚʔνϯɾϑΝ΢ϥʔ

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ճؼςετΛཷΊࠐΉ % ls t/99_rt_* | cat t/99_rt_blockquote_id.t t/99_rt_bold.t t/99_rt_indent.t t/99_rt_list.t t/99_rt_list_id.t t/99_rt_list_in_column.t t/99_rt_nested_parentheses.t t/99_rt_paragraph.t t/99_rt_quotes.t t/99_rt_ruby_in_footnote.t t/99_rt_table_indent.t ... •  όάൃݟˠճؼςετॻ͘ˠςετ௨͢

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ίπ

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ςετ͸͜·Ίʹճͦ͏

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ςετΛසൟʹͤΑɻίϯύΠϧ࣌ ʹ͸ςετΛہॴԽͯ͠ɺ೔ʹ࠷௿ ౓͸͢΂ͯͷςετΛ࣮ߦͤ Αɻ 1 ʰϦϑΝΫλϦϯάϓϩάϥϛϯάͷମ࣭վળςΫχοΫʱ ϚʔνϯɾϑΝ΢ϥʔ

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ܧଓతΠϯςάϨʔγϣϯ 5SBWJT$*

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(VBSEHVBSEUBQ h"p://hitode909.hatenablog.com/entry/2013/05/11/190623

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ςετ͸ແཧͤͣ ʮ΄Ͳ΄Ͳʯఔ౓ʹ

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ෆ׬શͳςετͰ΋ɺॻ͍࣮ͯߦ͢ Δํ͕ɺ࣮ߦͰ͖ͳ͍׬શͳςετ ΑΓ΋·ͩ͠ɻ 1 ʰϦϑΝΫλϦϯάϓϩάϥϛϯάͷମ࣭վળςΫχοΫʱ ϚʔνϯɾϑΝ΢ϥʔ

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%))΋͜͏ݴ͍ͬͯΔ •  ʮΧόϨοδ͸Λ໨ࢦ͞ͳ͍ʯ •  ʮ࡞ۀͷ൒෼Ҏ্͕ςετɺ͸͓͔͍͠ʯ •  ʮςετϑΝʔετʹͩ͜ΘΒͳ͍ʯ – ͕ςετϑΝʔετͰ͕ςετΞ ϑλʔ h"p://37signals.com/svn/posts/3159-‐tes@ng-‐like-‐the-‐tsa

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ςετ͸ɺ͍͍ͩͨͰɻ Ͱ΋සൟʹ࣮ߦ •  ·ͣ͸ϦϑΝΫλϦϯά͕ා͘ͳ͍ఔ౓ʹς ετ͕͋Ε͹͍͍ –  ϦϑΝΫλϦϯά͕ਐΉͱςετ͕ॻ͖΍͘͢ –  ࣗવͱΧόϨοδ͸্͕Δ •  ϦϑΝΫλϦϯάதʹݟ͚ͭͨόάͷճؼς ετΛཷΊΑ͏ –  ࣗવͱݎ࿚ʹͳ͍ͬͯ͘ •  ࡞ͬͨςετ͸ͪΐͬͱߋ৽ͷ౓ɺසൟʹ࣮ ߦ͠Α͏

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(PPE+PC package Text::Md2Inao::Builder::Inao; use parent qw/Text::Md2Inao::Builder/; use Text::Md2Inao::Builder::DSL; case default => sub { my ($c, $h) = @_; fallback_to_html($h); }; case a => sub { my ($c, $h) = @_; my $url = $h-‐>attr('href'); my $title = $h-‐>as_trimmed_text; if ($url and $title) { return sprintf "%s◆注/◆%s◆/注◆", $title, $url; } else { return fallback_to_html($h); } }; ...