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POReplacing html script element sources with regular expression in Python
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  1. POReplacing html script element sources with regular expression in Python
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    copied!<p>I'm trying to write a large python/bash script which converts my html/css mockups to Shopify themes. One step in this process is changing out all the script sources. For instance:</p> <pre><code>&lt;script type="text/javascript" src="./js/jquery.bxslider.min.js"&gt;&lt;/script&gt; </code></pre> <p>becomes</p> <pre><code>&lt;script type="text/javascript" src="{{ 'jquery.bxslider.min.js' | asset_url }}"&gt;&lt;/script&gt; </code></pre> <p>Here is what I have so far:</p> <pre><code>import re test = """ &lt;script type="text/javascript" src="./js/jquery-1.8.3.min.js"&gt;&lt;/script&gt; &lt;!--&lt;script src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js" type="text/javascript"&gt;&lt;/script&gt;--&gt; &lt;script type="text/javascript" src="./js/ie-amendments.js"&gt;&lt;/script&gt; &lt;script type="text/javascript" src="./js/jquery.bxslider.min.js"&gt;&lt;/script&gt; &lt;script type="text/javascript" src="./js/jquery.colorbox-min.js"&gt;&lt;/script&gt; &lt;script type="text/javascript" src="./js/main.js"&gt;&lt;/script&gt; """ out = re.sub( 'src=\"(.+)\"', 'src="{{ \'\\1\' | asset_url }}"', test, flags=re.MULTILINE ) out </code></pre> <p>prints out</p> <pre><code>'\n &lt;script type="text/javascript" src="{{ \'./js/jquery-1.8.3.min.js\' | asset_url }}"&gt;&lt;/script&gt;\n &lt;!--&lt;script src="{{ \'http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js" type="text/javascript\' | asset_url }}"&gt;&lt;/script&gt;--&gt;\n &lt;script type="text/javascript" src="{{ \'./js/ie-amendments.js\' | asset_url }}"&gt;&lt;/script&gt;\n &lt;script type="text/javascript" src="{{ \'./js/jquery.bxslider.min.js\' | asset_url }}"&gt;&lt;/script&gt;\n &lt;script type="text/javascript" src="{{ \'./js/jquery.colorbox-min.js\' | asset_url }}"&gt;&lt;/script&gt;\n &lt;script type="text/javascript" src="{{ \'./js/main.js\' | asset_url }}"&gt;&lt;/script&gt;\n' </code></pre> <p>I have two problems so far:</p> <ol> <li><p>Some of the backslash characters I'm using to escape the single quotes within my regexes are showing up in the output.</p></li> <li><p>My capture group is capturing the entire original source string, but I just need what comes after the last "/"</p></li> </ol> <p><strong>ANSWER</strong>: Per Martijn Pieters helpful suggestion, I checked out the ? regular expression operator, and came up with this solution, which perfectly solved my problem. Also, for the replacement expression, I encapsulated it in double-quotes as opposed to singles, and escaped the doubles, which ended up removing the unnecessary backslashes. Thanks guys!</p> <pre><code>re.sub( r'src=".+?([^/]+?\.js)"', "src=\"{{ '\\1' | asset_url }}\"", test, flags=re.MULTILINE ) </code></pre>
 

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