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<span id="Contribution-Guidelines"></span><div class="header">
<p>
Next: <a href="Init-System.html" accesskey="n" rel="next">Init System</a>, Previous: <a href="Package-Manager.html" accesskey="p" rel="prev">Package Manager</a>, Up: <a href="index.html" accesskey="u" rel="up">Top</a> &nbsp; </p>
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<hr>
<span id="Contribution-Guidelines-1"></span><h2 class="chapter">3 Contribution Guidelines</h2>

<p>Thanks for taking your time to contribute! To maintain stylistic behaviour
throughout the repositories, one must adhere to these guidelines. Exceptions and
changes may occur with good reasoning.
</p>
<span id="General-Conventions-_002d_002d-GN"></span><h3 class="section">3.1 General Conventions &ndash; GN</h3>

<p>These apply to each and every file on the repositories.
</p>
<ul>
<li> Try to keep the file readable. [<span id="GN0010"></span>GN0010]
<ul>
<li> Characters on a line shouldn&rsquo;t exceed 100 characters excluding indentation. [<span id="GN0011"></span>GN0011]
</li><li> Make sure you don&rsquo;t have code commented out during commit. Uncomment them
or remove them completely. [<span id="GN0012"></span>GN0012]
</li><li> Do not add comments following the code, add them to the top of the code. It
makes it harder to read, and lines longer. [<span id="GN0013"></span>GN0013]
Here is an example:
<div class="example">
<pre class="example"># Good way of commenting.
your code goes here

your code goes here  # Avoid this way of commenting.
</pre></div>
</li></ul>
</li></ul>

<span id="Shell-conventions-_002d_002d-SH"></span><h3 class="section">3.2 Shell conventions &ndash; SH</h3>

<p>Shell is central to Carbs Linux projects. Most of the tools and packages are
written in POSIX sh.
</p>
<ul>
<li> Use 4 spaces for indentation, instead of tabs. [<span id="SH0010"></span>SH0010]
</li><li> Make sure you don&rsquo;t use bash-specific code. [<span id="SH0020"></span>SH0020]
</li><li> Make sure you lint your code with <code>shellcheck</code> and if you are new to
POSIX sh, use <code>checkbashisms</code>. [<span id="SH0030"></span>SH0030]
</li><li> Don&rsquo;t spawn new processes if you don&rsquo;t absolutely need to, especially during
string manipulation. [<span id="SH0040"></span>SH0040]
<ul>
<li> Never use a program for text manupilation that isn&rsquo;t defined in the POSIX
standard. This includes <code>gawk</code> and <code>perl</code>. [<span id="SH0041"></span>SH0041]
</li><li> Instead of <code>$(basename $file)</code>, use <code>${file##*}</code>. [<span id="SH0042"></span>SH0042]
</li><li> Instead of <code>$(dirname $file)</code>, use <code>${file%/*}</code>. [<span id="SH0043"></span>SH0043]
</li></ul>
<div class="example">
<pre class="example"># This is the same thing as <code>basename /path/to/test.asc .asc</code>

$ file=/path/to/test.asc file=${file##*/} file=${file%.asc}
$ echo $file
test
</pre></div>
</li><li> Instead of backticks, use <tt>$(..)</tt>. [<span id="SH0050"></span>SH0050]
</li></ul>
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