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<span id="Conventions"></span><div class="header">
<p>
Up: <a href="Contribution-Guidelines.html" accesskey="u" rel="up">Contribution Guidelines</a> </p>
</div>
<hr>
<span id="Conventions-1"></span><h3 class="section">3.1 Conventions</h3>
<span id="General-Conventions-_002d_002d-00"></span><h4 class="subsection">3.1.1 General Conventions – 00</h4>
<p>These apply to each and every file on the repositories.
</p>
<ul>
<li> Try to keep the file readable. <strong>[<span id="g_t0010"></span>0010]</strong>
<ul>
<li> Characters on a line shouldn’t exceed 100 characters excluding indentation. <strong>[<span id="g_t0011"></span>0011]</strong>
</li><li> Make sure you don’t have code commented out during commit. Uncomment them
or remove them completely. <strong>[<span id="g_t0012"></span>0012]</strong>
</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. <strong>[<span id="g_t0013"></span>0013]</strong>
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-10"></span><h4 class="subsection">3.1.2 Shell Conventions – 10</h4>
<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. <strong>[<span id="g_t1010"></span>1010]</strong>
</li><li> Make sure you don’t use bash-specific code. <strong>[<span id="g_t1020"></span>1020]</strong>
</li><li> Make sure you lint your code with <code>shellcheck</code> and if you are new to
POSIX sh, use <code>checkbashisms</code>. <strong>[<span id="g_t1030"></span>1030]</strong>
</li><li> Don’t spawn new processes if you don’t absolutely need to, especially during
string manipulation. <strong>[<span id="g_t1040"></span>1040]</strong>
<ul>
<li> Never use a program for text manupilation that isn’t defined in the POSIX
standard. This includes <code>gawk</code> and <code>perl</code>. <strong>[<span id="g_t1041"></span>1041]</strong>
</li><li> Instead of <code>$(basename $file)</code>, use <code>${file##*}</code>. <strong>[<span id="g_t1042"></span>1042]</strong>
</li><li> Instead of <code>$(dirname $file)</code>, use <code>${file%/*}</code>. <strong>[<span id="g_t1043"></span>1043]</strong>
</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>. <strong>[<span id="g_t1050"></span>1050]</strong>
</li></ul>
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