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POHow do I correctly use sed to search/replace parts of a line from a variable
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  1. POHow do I correctly use sed to search/replace parts of a line from a variable
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    copied!<p>Background: I am using ZenCart php software, with sed I wanted to edit different themes, but with the same php files. So some automatic changes to themes via sed. </p> <pre><code>s1=$'&lt;img itemprop="image" src="'\'' . zen_output_string($src) . '\''"' sed -i.bak -r 's/$image = '\''&lt;img src="'\'' \. zen_output_string\($src\) \. '\''" alt="'\'' \. zen_output_string\($alt\) \. '\''"'\'';/'"$s1"/ html_output.php </code></pre> <p>This runs ok, but no changes are in the file, why, what's wrong?</p> <p><strong>Edit I managed to workaround this problem, resulting in the following script:</strong></p> <pre><code>echo "Updating your Zencart theme's files..." echo "Creating backups of important files." mkdir -p ./zentmp/includes/functions &amp;&amp; cp ./includes/functions/html_output.php ./zentmp/includes/functions/ &amp;&amp; mkdir -p ./zentmp/includes/templates &amp;&amp; cp -Rf ./includes/templates/ ./zentmp/includes/templates &amp;&amp; mkdir -p ./zentmp/includes/classes &amp;&amp; cp ./includes/classes/breadcrumb.php /zentmp/includes/classes/ echo "Updating theme file /includes/functions/html_output.php" s1=$'itemprop="image" src="'\'' . zen_output_string($src) . '\''"' sed -i -r 's/src="'\'' \. zen_output_string\(\$src\) \. '\''"/'"${s1}"/ html_output.php echo "File updated..." s2=$'itemprop="image" class="imgLink"' for dir in ./zentmp/includes/templates/*/ do dir=${dir%*/} echo "Updating theme file /$dir/tpl_modules_main_product_image.php" (1/2) sed -i -r 's/class="imgLink"/'"${s2}"/ ./$dir/tpl_modules_main_product_image.php echo "Updating theme file /$dir/tpl_modules_main_product_image.php" (2/2) s3=$'title="'\'' . addslashes($products_name) . '\'' itemprop="image"' sed -i -r 's/title="'\'' \. addslashes\(\$products\_name\) \. '\''"/'"${s3}"/ ./$dir/tpl_modules_main_product_image.php done </code></pre> <p>The above works pretty well, until the following piece of code:</p> <pre><code>for dir2 in ./zentmp/includes/templates/*/ do dir2=${dir2%*/} s4=$"&lt;span itemprop="name"&gt;&lt;?php echo \$products_name; ?&gt;" sed -i -r 's/&lt;?php echo \$products_name; ?&gt;'/'"${s4}"/ ./$dir2/tpl_product_info_display.php done </code></pre> <p>As requested, I'll post the snippets I'm trying to replace in order of usage:</p> <blockquote> <pre><code>$image = '&lt;img src="' . zen_output_string($src) . '" alt="' . zen_output_string($alt) . '"'; </code></pre> <p>to</p> <pre><code>$image = '&lt;img itemprop="image" src="' . zen_output_string($src) . '" alt="' . zen_output_string($alt) . '"'; </code></pre> </blockquote> <p>Second:</p> <blockquote> <pre><code>&lt;span class="imgLink"&gt; </code></pre> <p>to</p> <pre><code>&lt;span itemprop="image" class="imgLink"&gt; </code></pre> </blockquote> <p>Third:</p> <pre><code>$rel . '" title="' . addslashes($products_name) . '"&gt; </code></pre> <p>to</p> <pre><code>$rel . '" title="' . addslashes($products_name) . '" itemprop="image"&gt; </code></pre> <p>Note that the 2nd sed is used twice.</p>
 

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