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diff --git a/public/posts/2021-10-02/ruby-detect-running-implementation/index.html b/public/posts/2021-10-02/ruby-detect-running-implementation/index.html new file mode 100644 index 0000000..6fe62d7 --- /dev/null +++ b/public/posts/2021-10-02/ruby-detect-running-implementation/index.html @@ -0,0 +1,167 @@ +<!DOCTYPE html> +<html lang="ja-JP"> + <head> + <meta charset="UTF-8"> + <meta name="viewport" content="width=device-width, initial-scale=1.0"> + <meta name="author" content="nsfisis"> + <meta name="copyright" content="© nsfisis"> + <meta name="description" content="Ruby には複数の実装があるが、自身を実行している処理系の種類を スクリプト上からどのように判定すればよいだろうか。"> + <meta name="keywords" content="Ruby"> + <link rel="icon" type="image/svg+xml" href="/favicon.svg"> + <title>【Ruby】自身を実行している処理系の種類を判定する | REPL: Rest-Eat-Program Loop</title> + <link rel="stylesheet" href="/hl.css"> + <link rel="stylesheet" href="/style.css"> + <link rel="stylesheet" href="/custom.css"> + </head> + <body class="single"> + <header class="header"> + <nav class="nav"> + <p class="logo"> + <a href="/">REPL: Rest-Eat-Program Loop</a> + </p> + </nav> + </header> + <main class="main"> + <article class="post-single"> + <header class="post-header"> + <h1 class="post-title">【Ruby】自身を実行している処理系の種類を判定する</h1> + + <ul class="post-tags"> + + <li class="tag"> + <a href="/tags/ruby/">Ruby</a> + </li> + + </ul> + + </header> + <div class="post-content"> + <section> + <h2 id="changelog">更新履歴</h2> + <ol> + + <li class="revision"> + <time datetime="2021-10-02">2021-10-02</time>: Qiita から移植 + </li> + + </ol> + </section> + <div class="paragraph"> +<p>この記事は Qiita から移植してきたものです。 元 URL: +<a href="https://qiita.com/nsfisis/items/74d7ffeeebc51b20d791" class="bare">https://qiita.com/nsfisis/items/74d7ffeeebc51b20d791</a></p> +</div> +<hr> +<div class="paragraph"> +<p>Ruby +という言語には複数の実装があるが、それらをスクリプト上からどのようにして +programmatically に見分ければよいだろうか。</p> +</div> +<div class="paragraph"> +<p><code>Object</code> クラスに定義されている <code>RUBY_ENGINE</code> +という定数がこの用途に使える。</p> +</div> +<div class="paragraph"> +<p>参考: +<a href="https://docs.ruby-lang.org/ja/latest/method/Object/c/RUBY_ENGINE.html">Object::RUBY_ENGINE</a></p> +</div> +<div class="paragraph"> +<p>上記ページの例から引用する:</p> +</div> +<div id="source." class="listingblock"> +<div class="content"> +<pre class="rouge highlight"><code data-lang="shell-session"><span class="gp">$</span><span class="w"> </span>ruby-1.9.1 <span class="nt">-ve</span> <span class="s1">'p RUBY_ENGINE'</span> +<span class="go">ruby 1.9.1p0 (2009-03-04 revision 22762) [x86_64-linux] +"ruby" +</span><span class="gp">$</span><span class="w"> </span>jruby <span class="nt">-ve</span> <span class="s1">'p RUBY_ENGINE'</span> +<span class="go">jruby 1.2.0 (ruby 1.8.6 patchlevel 287) (2009-03-16 rev 9419) [i386-java] +"jruby"</span></code></pre> +</div> +</div> +<div class="paragraph"> +<p>それぞれの処理系がどのような値を返すかだが、stack overflow +に良い質問と回答があった。</p> +</div> +<div class="paragraph"> +<p><a href="https://stackoverflow.com/a/9894232">What values for RUBY_ENGINE +correspond to which Ruby implementations?</a> より引用:</p> +</div> +<div class="quoteblock"> +<blockquote> +<table class="tableblock frame-all grid-all stretch"> +<colgroup> +<col style="width: 50%;"> +<col style="width: 50%;"> +</colgroup> +<thead> +<tr> +<th class="tableblock halign-center valign-top">RUBY_ENGINE</th> +<th class="tableblock halign-left valign-top">Implementation</th> +</tr> +</thead> +<tbody> +<tr> +<td class="tableblock halign-center valign-top"><p class="tableblock"><undefined></p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">MRI < 1.9</p></td> +</tr> +<tr> +<td class="tableblock halign-center valign-top"><p class="tableblock">`ruby'</p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">MRI >= 1.9 or REE</p></td> +</tr> +<tr> +<td class="tableblock halign-center valign-top"><p class="tableblock">`jruby'</p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">JRuby</p></td> +</tr> +<tr> +<td class="tableblock halign-center valign-top"><p class="tableblock">`macruby'</p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">MacRuby</p></td> +</tr> +<tr> +<td class="tableblock halign-center valign-top"><p class="tableblock">`rbx'</p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">Rubinius</p></td> +</tr> +<tr> +<td class="tableblock halign-center valign-top"><p class="tableblock">`maglev'</p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">MagLev</p></td> +</tr> +<tr> +<td class="tableblock halign-center valign-top"><p class="tableblock">`ironruby'</p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">IronRuby</p></td> +</tr> +<tr> +<td class="tableblock halign-center valign-top"><p class="tableblock">`cardinal'</p></td> +<td class="tableblock halign-left valign-top"><p class="tableblock">Cardinal</p></td> +</tr> +</tbody> +</table> +</blockquote> +</div> +<div class="paragraph"> +<p>なお、この質問・回答は +2014年になされたものであり、値は変わっている可能性がある。MRI (aka +CRuby) については執筆時現在 (2020/12/8) も <code>'ruby'</code> +が返ってくることを確認済み。</p> +</div> +<div class="paragraph"> +<p>この表にない主要な処理系として、https://mruby.org[mruby] は <code>'mruby'</code> +を返す。</p> +</div> +<div class="paragraph"> +<p><a href="https://github.com/mruby/mruby/blob/ed29d74bfd95362eaeb946fcf7e865d80346b62b/include/mruby/version.h#L32-L35">mruby +該当部分のソース</a> より引用:</p> +</div> +<div id="source." class="listingblock"> +<div class="content"> +<pre class="rouge highlight"><code data-lang="c"><span class="cm">/* + * Ruby engine. + */</span> +<span class="cp">#define MRUBY_RUBY_ENGINE "mruby"</span></code></pre> +</div> +</div> + </div> + </article> + </main> + <footer class="footer"> + © 2021 nsfisis + </footer> + </body> +</html> |