99 lines
4.1 KiB
HTML
99 lines
4.1 KiB
HTML
<?xml version="1.0" encoding="utf-8"?>
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml"><head>
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<title>.</title>
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<style type="text/css">
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* { color: #000; background: #fff; max-width: 700px; }
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tt, pre { background: #dedede; color: #111; font-family: monospace;
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white-space: pre; display: block; width: 100%; }
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.indentedcode { margin-left: 2em; margin-right: 2em; }
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.codeblock {
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background: #dedede; color: #111; font-family: monospace;
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box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.2), 0 6px 20px 0 rgba(0, 0, 0, 0.19);
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padding: 7px;
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display: block;
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}
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.indentedlist { margin-left: 2em; color: #000; }
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span { white-space: pre; }
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.text { color: #000; white-space: pre; background: #dedede; }
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.colon { color: #000; background: #dedede; }
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.note { color: #000; background: #dedede; }
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.num { color: #000; background: #dedede; font-weight: bold; font-style: italic; }
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.fnum { color: #000; font-weight: bold; background: #dedede; }
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.ptr { color: #000; font-weight: bold; background: #dedede; }
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.fetch { color: #000; font-style: italic; background: #dedede; }
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.store { color: #000; font-style: italic; background: #dedede; }
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.char { color: #000; background: #dedede; }
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.inst { color: #000; background: #dedede; }
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.defer { color: #000; background: #dedede; }
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.imm { color: #000; font-weight: bold; background: #dedede; }
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.prim { color: #000; font-weight: bolder; background: #dedede; }
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.tt { white-space: pre; font-family: monospace; background: #dedede; }
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.h1, .h2, .h3, .h4 { white-space: normal; }
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.h1 { font-size: 125%; }
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.h2 { font-size: 120%; }
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.h3 { font-size: 115%; }
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.h4 { font-size: 110%; }
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.hr { display: block; height: 2px; background: #000000; }
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</style>
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</head><body>
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<p><span class="h1">Unix Scripting</span>
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<br/><br/>
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RETRO on Unix hosts is designed to play well with scripting.
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<br/><br/>
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<span class="h2">Shebang</span>
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<br/><br/>
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To run an entire program directly, start the file with the
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standard shebang and make the file executable:
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<br/><br/>
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<tt class='indentedcode'>#!/usr/bin/env retro</tt>
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<br/><br/>
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This requires the <span class="tt">retro</span> binary to be in your path.
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<br/><br/>
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<span class="h2">Arguments</span>
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<br/><br/>
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RETRO provides several words in the <span class="tt">script:</span> namespace for accessing
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command line arguments.
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<br/><br/>
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The number of arguments can be accessed via <span class="tt">script:arguments</span>. This
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will return a number with the arguments, other than the script
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name.
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<br/><br/>
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<tt class='indentedcode'>script:arguments '%n_arguments_passed\n s:format s:put</tt>
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<br/><br/>
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To retreive an argument, pass the argument number to <span class="tt">script:get-argument</span>:
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<br/><br/>
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<tt class='indentedcode'>script:arguments [ I script:get-argument s:put nl ] indexed-times </tt>
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<br/><br/>
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And to get the name of the script, use <span class="tt">script:name</span>.
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<br/><br/>
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<tt class='indentedcode'>script:name s:put</tt>
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<br/><br/>
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<span class="h2">Mixing</span>
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<br/><br/>
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With use of the Unu literate format, it's possible to mix both
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shell and RETRO code into a single script. As an example, this
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is a bit of shell that runs itself via retro for each .retro
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file in the current directory tree:
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<br/><br/>
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<tt class='indentedcode'>#!/bin/sh</tt>
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<br/><br/>
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<tt class='indentedcode'># shell part</tt>
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<tt class='indentedcode'>find . -name '*.retro' -print0 | xargs -0 -n 1 retro $0</tt>
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<tt class='indentedcode'>exit</tt>
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<br/><br/>
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<tt class='indentedcode'># retro part</tt>
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<br/><br/>
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<tt class='indentedcode'>This will scan a source file and do something with it:</tt>
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<br/><br/>
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<tt class='indentedcode'>~~~</tt>
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<tt class='indentedcode'>... do stuff ...</tt>
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<tt class='indentedcode'>~~~</tt>
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</p>
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</body></html>
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