diff options
| author | Cem Keylan <cem@ckyln.com> | 2020-09-14 20:09:17 +0300 |
|---|---|---|
| committer | Cem Keylan <cem@ckyln.com> | 2020-09-14 20:09:17 +0300 |
| commit | cbd19301ee92ed4db0c5abae4bb1886ab18d4198 (patch) | |
| tree | 07bb000855d5c428f0402a8ba17d9949daeb9735 /src/docs/Shell-Conventions.html | |
| parent | 5d68e14a04c700720d5e3df5a7298272909a4fc9 (diff) | |
| download | website-cbd19301ee92ed4db0c5abae4bb1886ab18d4198.tar.gz | |
update
Diffstat (limited to 'src/docs/Shell-Conventions.html')
| -rw-r--r-- | src/docs/Shell-Conventions.html | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/src/docs/Shell-Conventions.html b/src/docs/Shell-Conventions.html new file mode 100644 index 0000000..bcaf8b9 --- /dev/null +++ b/src/docs/Shell-Conventions.html @@ -0,0 +1,96 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> +<html> +<!-- Copyright (C) 2020 Cem Keylan + +Licensed under Gnu Free Documentation License. --> +<!-- Created by GNU Texinfo 6.7, http://www.gnu.org/software/texinfo/ --> +<head> +<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> +<title>Shell Conventions (Carbs Linux User Manual)</title> + +<meta name="description" content="Shell Conventions (Carbs Linux User Manual)"> +<meta name="keywords" content="Shell Conventions (Carbs Linux User Manual)"> +<meta name="resource-type" content="document"> +<meta name="distribution" content="global"> +<meta name="Generator" content="makeinfo"> +<link href="index.html" rel="start" title="Top"> +<link href="Conventions.html" rel="up" title="Conventions"> +<link href="Repository-Conventions.html" rel="next" title="Repository Conventions"> +<link href="General-Conventions.html" rel="prev" title="General Conventions"> +<style type="text/css"> +<!-- +a.summary-letter {text-decoration: none} +blockquote.indentedblock {margin-right: 0em} +div.display {margin-left: 3.2em} +div.example {margin-left: 3.2em} +div.lisp {margin-left: 3.2em} +kbd {font-style: oblique} +pre.display {font-family: inherit} +pre.format {font-family: inherit} +pre.menu-comment {font-family: serif} +pre.menu-preformatted {font-family: serif} +span.nolinebreak {white-space: nowrap} +span.roman {font-family: initial; font-weight: normal} +span.sansserif {font-family: sans-serif; font-weight: normal} +ul.no-bullet {list-style: none} +--> +</style> + + +</head> + +<body lang="en"> +<span id="Shell-Conventions"></span><div class="header"> +<p> +Next: <a href="Repository-Conventions.html" accesskey="n" rel="next">Repository Conventions</a>, Previous: <a href="General-Conventions.html" accesskey="p" rel="prev">General Conventions</a>, Up: <a href="Conventions.html" accesskey="u" rel="up">Conventions</a> </p> +</div> +<hr> +<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> +<dl compact="compact"> +<dt><strong>[<span id="g_t1010"></span>1010]</strong></dt> +<dd><p>Use 4 spaces for indentation, don’t use tabs. +</p></dd> +<dt><strong>[<span id="g_t1020"></span>1020]</strong></dt> +<dd><p>Make sure you don’t use bash-specific code. +</p></dd> +<dt><strong>[<span id="g_t1030"></span>1030]</strong></dt> +<dd><p>Make sure you lint your code with <code>shellcheck</code> and if you are new to +POSIX sh, use <code>checkbashisms</code>. +</p></dd> +<dt><strong>[<span id="g_t1040"></span>1040]</strong></dt> +<dd><p>Don’t spawn new processes if you don’t absolutely need to, especially during +string manipulation. +</p><dl compact="compact"> +<dt><strong>[<span id="g_t1041"></span>1041]</strong></dt> +<dd><p>Never use a program for text manupilation that isn’t defined in the POSIX +standard. This includes <code>gawk</code> and <code>perl</code>. +</p></dd> +<dt><strong>[<span id="g_t1042"></span>1042]</strong></dt> +<dd><p>Instead of <code>$(basename $file)</code>, use <code>${file##*}</code>. +</p></dd> +<dt><strong>[<span id="g_t1043"></span>1043]</strong></dt> +<dd><p>Instead of <code>$(dirname $file)</code>, use <code>${file%/*}</code>. +</p></dd> +</dl> +<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 $file +test +</pre></div> +</dd> +<dt><strong>[<span id="g_t1050"></span>1050]</strong></dt> +<dd><p>Instead of backticks, use <tt>$(..)</tt>. +</p></dd> +</dl> + + + + +</body> +</html> |