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<title>pretty (Rack::ShowExceptions)</title>
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<pre><span class="ruby-comment cmt"># File lib/rack/showexceptions.rb, line 64</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">pretty</span>(<span class="ruby-identifier">env</span>, <span class="ruby-identifier">exception</span>)
<span class="ruby-identifier">req</span> = <span class="ruby-constant">Rack</span><span class="ruby-operator">::</span><span class="ruby-constant">Request</span>.<span class="ruby-identifier">new</span>(<span class="ruby-identifier">env</span>)
<span class="ruby-comment cmt"># This double assignment is to prevent an "unused variable" warning on</span>
<span class="ruby-comment cmt"># Ruby 1.9.3. Yes, it is dumb, but I don't like Ruby yelling at me.</span>
<span class="ruby-identifier">path</span> = <span class="ruby-identifier">path</span> = (<span class="ruby-identifier">req</span>.<span class="ruby-identifier">script_name</span> <span class="ruby-operator">+</span> <span class="ruby-identifier">req</span>.<span class="ruby-identifier">path_info</span>).<span class="ruby-identifier">squeeze</span>(<span class="ruby-value str">"/"</span>)
<span class="ruby-comment cmt"># This double assignment is to prevent an "unused variable" warning on</span>
<span class="ruby-comment cmt"># Ruby 1.9.3. Yes, it is dumb, but I don't like Ruby yelling at me.</span>
<span class="ruby-identifier">frames</span> = <span class="ruby-identifier">frames</span> = <span class="ruby-identifier">exception</span>.<span class="ruby-identifier">backtrace</span>.<span class="ruby-identifier">map</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">line</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">frame</span> = <span class="ruby-constant">OpenStruct</span>.<span class="ruby-identifier">new</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">line</span> <span class="ruby-operator">=~</span> <span class="ruby-regexp re">/(.*?):(\d+)(:in `(.*)')?/</span>
<span class="ruby-identifier">frame</span>.<span class="ruby-identifier">filename</span> = <span class="ruby-identifier">$1</span>
<span class="ruby-identifier">frame</span>.<span class="ruby-identifier">lineno</span> = <span class="ruby-identifier">$2</span>.<span class="ruby-identifier">to_i</span>
<span class="ruby-identifier">frame</span>.<span class="ruby-identifier">function</span> = <span class="ruby-identifier">$4</span>
<span class="ruby-keyword kw">begin</span>
<span class="ruby-identifier">lineno</span> = <span class="ruby-identifier">frame</span>.<span class="ruby-identifier">lineno</span><span class="ruby-operator">-</span><span class="ruby-value">1</span>
<span class="ruby-identifier">lines</span> = <span class="ruby-operator">::</span><span class="ruby-constant">File</span>.<span class="ruby-identifier">readlines</span>(<span class="ruby-identifier">frame</span>.<span class="ruby-identifier">filename</span>)
<span class="ruby-identifier">frame</span>.<span class="ruby-identifier">pre_context_lineno</span> = [<span class="ruby-identifier">lineno</span><span class="ruby-operator">-</span><span class="ruby-constant">CONTEXT</span>, <span class="ruby-value">0</span>].<span class="ruby-identifier">max</span>
<span class="ruby-identifier">frame</span>.<span class="ruby-identifier">pre_context</span> = <span class="ruby-identifier">lines</span>[<span class="ruby-identifier">frame</span>.<span class="ruby-identifier">pre_context_lineno</span><span class="ruby-operator">...</span><span class="ruby-identifier">lineno</span>]
<span class="ruby-identifier">frame</span>.<span class="ruby-identifier">context_line</span> = <span class="ruby-identifier">lines</span>[<span class="ruby-identifier">lineno</span>].<span class="ruby-identifier">chomp</span>
<span class="ruby-identifier">frame</span>.<span class="ruby-identifier">post_context_lineno</span> = [<span class="ruby-identifier">lineno</span><span class="ruby-operator">+</span><span class="ruby-constant">CONTEXT</span>, <span class="ruby-identifier">lines</span>.<span class="ruby-identifier">size</span>].<span class="ruby-identifier">min</span>
<span class="ruby-identifier">frame</span>.<span class="ruby-identifier">post_context</span> = <span class="ruby-identifier">lines</span>[<span class="ruby-identifier">lineno</span><span class="ruby-operator">+</span><span class="ruby-value">1</span><span class="ruby-operator">..</span><span class="ruby-identifier">frame</span>.<span class="ruby-identifier">post_context_lineno</span>]
<span class="ruby-keyword kw">rescue</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">frame</span>
<span class="ruby-keyword kw">else</span>
<span class="ruby-keyword kw">nil</span>
<span class="ruby-keyword kw">end</span>
}.<span class="ruby-identifier">compact</span>
<span class="ruby-ivar">@template</span>.<span class="ruby-identifier">result</span>(<span class="ruby-identifier">binding</span>)
<span class="ruby-keyword kw">end</span></pre>
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