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POFilter Hidden Files with Bash (for Batch Image Resize Script)
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  1. POFilter Hidden Files with Bash (for Batch Image Resize Script)
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    copied!<p>I'm writing a script to batch resize images. Originally I was applying an operation <code>for file in $(ls $1)</code>, but I would like to be able to use globbing, so I'm looking at something more like <code>for file in $(echo $1)</code>. The problem is that dotglob may or may not be enabled, so <code>echo *</code> could return hidden files (notably, .DS_Store), which cause <code>convert</code> to throw an error and stop the script. <strong>I would like the default behavior of the command to be</strong> that if I <code>cd</code> into a directory full of images and execute <code>resize * 400x400 jpg</code>, all of the images will be resized <i>excluding</i> hidden files, regardless of whether dotglob is enabled.</p> <p>So, in pseudo code, <strong>I'm looking for</strong>:</p> <pre><code>for file in $(echo $1 | [filter-hidden-files]) </code></pre> <p>Here is my script with the <strong>older behavior</strong>. Will update with new behavior when I find a solution:</p> <pre><code># !/bin/bash # resize [folder] [sizeXxsizeY] [outputformat] # if [outputformat] is omitted, the input file format is assumed for file in $(ls $1) do IMGNAME=$(echo "$file" | cut -d'.' -f1) if test -z $3 then EXTENSION=$(echo "$file" | cut -d'.' -f2) convert $1/$file -resize $2 -quality 100 $1/$IMGNAME-$2.$EXTENSION echo "$file =&gt; $IMGNAME-$2.$EXTENSION" else convert $1/$file -resize $2 -quality 100 $1/$IMGNAME-$2.$3 echo "$file =&gt; $IMGNAME-$2.$3" fi done </code></pre> <p>Here is the <strong>current</strong> script:</p> <pre><code># !/bin/bash # resize [pattern] [sizeXxsizeY] [outputformat] # if [outputformat] is omitted, the input file format is assumed for file in $(echo $1) do IMGNAME=$(echo "$file" | cut -d'.' -f1) if test -z $3 &amp;&amp; if test -f $3 then EXTENSION=$(echo "$file" | cut -d'.' -f2) convert $file -resize $2 -quality 100 $IMGNAME-$2.$EXTENSION echo "$file =&gt; $IMGNAME-$2.$EXTENSION" else convert $file -resize $2 -quality 100 $IMGNAME-$2.$3 echo "$file =&gt; $IMGNAME-$2.$3" fi done </code></pre> <p>Given the command <code>resize * 400x400</code>, convert throws an error as it cannot process .DS_Store (a hidden file residing in every file on an OSX system). As I will never be processing hidden images, I would like to automatically filter them. I've been trying to do this with grep or find, but I haven't figured it out yet. </p> <p>New script goes here:</p> <pre><code>for file in $(echo $1) do </code></pre>
 

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