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<h1>demo6 <small>Program</small>
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<a class="list-group-item" href="../program/demo6.html#variable-help_text~4">help_text</a>
<a class="list-group-item" href="../program/demo6.html#variable-l~6">l</a>
<a class="list-group-item" href="../program/demo6.html#variable-l_~3">l_</a>
<a class="list-group-item" href="../program/demo6.html#variable-name~2">name</a>
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<li><a href='../module/m_cli2.html'>M_CLI2</a></li>
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<p>@(#) SUBCOMMANDS</p>
<p>For a command with subcommands like git(1) you can call this program
which has two subcommands (run, test), like this:</p>
<p>demo6 –help
demo6 run -x -y -z -title -l -L
demo6 test -title -l -L -testname
demo6 run –help</p>
<br>
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<h3>Contents</h3>
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<a data-toggle="collapse" href="#vars-1">Variables</a>
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<a class="list-group-item" href="../program/demo6.html#variable-help_text~4">help_text</a>
<a class="list-group-item" href="../program/demo6.html#variable-l~6">l</a>
<a class="list-group-item" href="../program/demo6.html#variable-l_~3">l_</a>
<a class="list-group-item" href="../program/demo6.html#variable-name~2">name</a>
<a class="list-group-item" href="../program/demo6.html#variable-testname">testname</a>
<a class="list-group-item" href="../program/demo6.html#variable-title~6">title</a>
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<div class="panel-heading text-left"><h3 class="panel-title">Source Code</h3></div>
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<a class="list-group-item" href="../program/demo6.html#src">demo6</a>
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</section>
<br class="visible-xs visible-sm hidden-md">
<section>
<h2>Variables</h2>
<table class="table table-striped varlist">
<thead>
<tr>
<th>Type</th>
<th>Attributes</th>
<th></th>
<th>Name</th>
<th></th><th>Initial</th> <th></th>
</thead>
<tbody>
<tr>
<td>
<span class="anchor" id="variable-help_text~4"></span>
character(len=:),
</td>
<td>
allocatable
</td>
<td>::</td>
<td><strong>help_text</strong>(:)</td>
<td></td>
<td></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" id="variable-l~6"></span>
logical
</td>
<td>
</td>
<td>::</td>
<td><strong>l</strong></td>
<td></td>
<td></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" id="variable-l_~3"></span>
logical
</td>
<td>
</td>
<td>::</td>
<td><strong>l_</strong></td>
<td></td>
<td></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" id="variable-name~2"></span>
character(len=:),
</td>
<td>
allocatable
</td>
<td>::</td>
<td><strong>name</strong></td>
<td></td>
<td></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" id="variable-testname"></span>
character(len=80)
</td>
<td>
</td>
<td>::</td>
<td><strong>testname</strong></td>
<td></td>
<td></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" id="variable-title~6"></span>
character(len=80)
</td>
<td>
</td>
<td>::</td>
<td><strong>title</strong></td>
<td></td>
<td></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" id="variable-version_text~4"></span>
character(len=:),
</td>
<td>
allocatable
</td>
<td>::</td>
<td><strong>version_text</strong>(:)</td>
<td></td>
<td></td>
<td>
</td>
</tr>
</tbody>
</table>
</section>
<br>
<section>
<h2>Subroutines</h2>
<div class="panel panel-default">
<div class="panel-heading codesum"><span class="anchor" id="proc-my_run"></span><h3> subroutine <a href='../proc/my_run.html'>my_run</a>(x, y, z, title, l, l_)
</h3></div>
<div class="panel-body">
<h4>Arguments</h4>
<table class="table table-striped varlist">
<thead>
<tr>
<th>Type</th>
<th>Intent</th><th>Optional</th> <th>Attributes</th>
<th></th>
<th>Name</th>
<th></th>
</thead>
<tbody>
<tr>
<td>
<span class="anchor" ></span>
real,
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>x</strong></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" ></span>
real,
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>y</strong></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" ></span>
real,
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>z</strong></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" ></span>
character(len=*),
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>title</strong></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" ></span>
logical,
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>l</strong></td>
<td>
</td>
</tr>
<tr>
<td>
<span class="anchor" ></span>
logical,
</td>
<td>intent(in)</td>
<td></td> <td>
</td>
<td>::</td>
<td><strong>l_</strong></td>
<td>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</section>
<section>
<h2 id="src">Source Code</h2>
<div class="highlight"><pre><span></span><span class="k">program </span><span class="n">demo6</span><span class="w"></span>
<span class="c">!! @(#) SUBCOMMANDS</span>
<span class="c">!!</span>
<span class="c">!! For a command with subcommands like git(1) you can call this program</span>
<span class="c">!! which has two subcommands (run, test), like this:</span>
<span class="c">!!</span>
<span class="c">!! demo6 --help</span>
<span class="c">!! demo6 run -x -y -z -title -l -L</span>
<span class="c">!! demo6 test -title -l -L -testname</span>
<span class="c">!! demo6 run --help</span>
<span class="c">!!</span>
<span class="k">use </span><span class="n">M_CLI2</span><span class="p">,</span><span class="w"> </span><span class="k">only</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">set_args</span><span class="p">,</span><span class="w"> </span><span class="n">get_args</span><span class="p">,</span><span class="w"> </span><span class="n">get_args_fixed_length</span><span class="p">,</span><span class="w"> </span><span class="n">get_subcommand</span><span class="w"></span>
<span class="k">use </span><span class="n">M_CLI2</span><span class="p">,</span><span class="w"> </span><span class="k">only</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">rget</span><span class="p">,</span><span class="n">sget</span><span class="p">,</span><span class="n">lget</span><span class="w"></span>
<span class="k">use </span><span class="n">M_CLI2</span><span class="p">,</span><span class="w"> </span><span class="k">only</span><span class="w"> </span><span class="p">:</span><span class="w"> </span><span class="n">CLI_RESPONSE_FILE</span><span class="w"></span>
<span class="k">implicit none</span>
<span class="kt">character</span><span class="p">(</span><span class="nb">len</span><span class="o">=</span><span class="p">:),</span><span class="k">allocatable</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">name</span><span class="w"> </span><span class="c">! the subcommand name</span>
<span class="kt">character</span><span class="p">(</span><span class="nb">len</span><span class="o">=</span><span class="p">:),</span><span class="k">allocatable</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">version_text</span><span class="p">(:),</span><span class="w"> </span><span class="n">help_text</span><span class="p">(:)</span><span class="w"></span>
<span class="c">! define some values to use as arguments </span>
<span class="kt">character</span><span class="p">(</span><span class="nb">len</span><span class="o">=</span><span class="mi">80</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">title</span><span class="p">,</span><span class="w"> </span><span class="n">testname</span><span class="w"></span>
<span class="kt">logical</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">l</span><span class="p">,</span><span class="w"> </span><span class="n">l_</span><span class="w"></span>
<span class="w"> </span><span class="k">print</span><span class="w"> </span><span class="o">*</span><span class="p">,</span><span class="s1">'demo6: creating subcommands'</span><span class="w"></span>
<span class="w"> </span><span class="n">version_text</span><span class="o">=</span><span class="p">[</span><span class="kt">character</span><span class="p">(</span><span class="nb">len</span><span class="o">=</span><span class="mi">80</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">'@(#)PROGRAM: demo6 >'</span><span class="p">,</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">'@(#)DESCRIPTION: My demo program >'</span><span class="p">,</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">'@(#)VERSION: 1.0 20200715 >'</span><span class="p">,</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">'@(#)AUTHOR: me, myself, and I>'</span><span class="p">,</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">'@(#)LICENSE: Public Domain >'</span><span class="p">,</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">''</span><span class="w"> </span><span class="p">]</span><span class="w"></span>
<span class="w"> </span><span class="n">CLI_RESPONSE_FILE</span><span class="o">=</span><span class="p">.</span><span class="n">true</span><span class="p">.</span><span class="w"></span>
<span class="w"> </span><span class="c">! find the subcommand name by looking for first word on command</span>
<span class="w"> </span><span class="c">! not starting with dash</span>
<span class="w"> </span><span class="n">name</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">get_subcommand</span><span class="p">()</span><span class="w"></span>
<span class="w"> </span><span class="c">! define commands and parse command line and set help text and process command</span>
<span class="w"> </span><span class="k">select case</span><span class="p">(</span><span class="n">name</span><span class="p">)</span><span class="w"> </span>
<span class="w"> </span><span class="k">case</span><span class="p">(</span><span class="s1">'run'</span><span class="p">)</span><span class="w"></span>
<span class="w"> </span><span class="n">help_text</span><span class="o">=</span><span class="p">[</span><span class="kt">character</span><span class="p">(</span><span class="nb">len</span><span class="o">=</span><span class="mi">80</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">' '</span><span class="p">,</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">' Help for subcommand "run" '</span><span class="p">,</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">' '</span><span class="p">,</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">''</span><span class="w"> </span><span class="p">]</span><span class="w"></span>
<span class="w"> </span><span class="k">call </span><span class="n">set_args</span><span class="p">(</span><span class="s1">'-x 1 -y 2 -z 3 --title "my title" -l F -L F'</span><span class="p">,</span><span class="n">help_text</span><span class="p">,</span><span class="n">version_text</span><span class="p">)</span><span class="w"></span>
<span class="w"> </span><span class="c">! example using convenience functions to retrieve values and pass them</span>
<span class="w"> </span><span class="c">! to a routine</span>
<span class="w"> </span><span class="k">call </span><span class="n">my_run</span><span class="p">(</span><span class="n">rget</span><span class="p">(</span><span class="s1">'x'</span><span class="p">),</span><span class="n">rget</span><span class="p">(</span><span class="s1">'y'</span><span class="p">),</span><span class="n">rget</span><span class="p">(</span><span class="s1">'z'</span><span class="p">),</span><span class="n">sget</span><span class="p">(</span><span class="s1">'title'</span><span class="p">),</span><span class="n">lget</span><span class="p">(</span><span class="s1">'l'</span><span class="p">),</span><span class="n">lget</span><span class="p">(</span><span class="s1">'L'</span><span class="p">))</span><span class="w"></span>
<span class="w"> </span><span class="k">case</span><span class="p">(</span><span class="s1">'test'</span><span class="p">)</span><span class="w"></span>
<span class="w"> </span><span class="n">help_text</span><span class="o">=</span><span class="p">[</span><span class="kt">character</span><span class="p">(</span><span class="nb">len</span><span class="o">=</span><span class="mi">80</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">' '</span><span class="p">,</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">' Help for subcommand "test" '</span><span class="p">,</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">' '</span><span class="p">,</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">''</span><span class="w"> </span><span class="p">]</span><span class="w"></span>
<span class="w"> </span><span class="k">call </span><span class="n">set_args</span><span class="p">(</span><span class="s1">'--title "my title" -l F -L F --testname "Test"'</span><span class="p">,</span><span class="n">help_text</span><span class="p">,</span><span class="n">version_text</span><span class="p">)</span><span class="w"></span>
<span class="w"> </span><span class="c">! use get_args(3f) to extract values and use them</span>
<span class="w"> </span><span class="k">call </span><span class="n">get_args_fixed_length</span><span class="p">(</span><span class="s1">'title'</span><span class="p">,</span><span class="n">title</span><span class="p">)</span><span class="w"></span>
<span class="w"> </span><span class="k">call </span><span class="n">get_args</span><span class="p">(</span><span class="s1">'l'</span><span class="p">,</span><span class="n">l</span><span class="p">)</span><span class="w"></span>
<span class="w"> </span><span class="k">call </span><span class="n">get_args</span><span class="p">(</span><span class="s1">'L'</span><span class="p">,</span><span class="n">l_</span><span class="p">)</span><span class="w"></span>
<span class="w"> </span><span class="k">call </span><span class="n">get_args_fixed_length</span><span class="p">(</span><span class="s1">'testname'</span><span class="p">,</span><span class="n">testname</span><span class="p">)</span><span class="w"></span>
<span class="w"> </span><span class="c">! all done cracking the command line. use the values in your program.</span>
<span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="s1">'command was '</span><span class="p">,</span><span class="n">name</span><span class="w"></span>
<span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="s1">'title .... '</span><span class="p">,</span><span class="nb">trim</span><span class="p">(</span><span class="n">title</span><span class="p">)</span><span class="w"></span>
<span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="s1">'l,l_ ..... '</span><span class="p">,</span><span class="n">l</span><span class="p">,</span><span class="n">l_</span><span class="w"></span>
<span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="s1">'testname . '</span><span class="p">,</span><span class="nb">trim</span><span class="p">(</span><span class="n">testname</span><span class="p">)</span><span class="w"></span>
<span class="w"> </span><span class="k">case</span><span class="p">(</span><span class="s1">''</span><span class="p">)</span><span class="w"></span>
<span class="w"> </span><span class="c">! general help for "demo6 --help"</span>
<span class="w"> </span><span class="n">help_text</span><span class="o">=</span><span class="p">[</span><span class="kt">character</span><span class="p">(</span><span class="nb">len</span><span class="o">=</span><span class="mi">80</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">' General help describing the '</span><span class="p">,</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">' program. '</span><span class="p">,</span><span class="w"> </span><span class="p">&</span><span class="w"></span>
<span class="w"> </span><span class="s1">''</span><span class="w"> </span><span class="p">]</span><span class="w"></span>
<span class="w"> </span><span class="k">call </span><span class="n">set_args</span><span class="p">(</span><span class="s1">' '</span><span class="p">,</span><span class="n">help_text</span><span class="p">,</span><span class="n">version_text</span><span class="p">)</span><span class="w"> </span><span class="c">! process help and version</span>
<span class="w"> </span><span class="k">case </span><span class="n">default</span><span class="w"></span>
<span class="w"> </span><span class="k">call </span><span class="n">set_args</span><span class="p">(</span><span class="s1">' '</span><span class="p">,</span><span class="n">help_text</span><span class="p">,</span><span class="n">version_text</span><span class="p">)</span><span class="w"> </span><span class="c">! process help and version</span>
<span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="s1">'(*(a))'</span><span class="p">)</span><span class="s1">'unknown or missing subcommand ['</span><span class="p">,</span><span class="nb">trim</span><span class="p">(</span><span class="n">name</span><span class="p">),</span><span class="s1">']'</span><span class="w"></span>
<span class="w"> </span><span class="k">end select</span>
<span class="k">contains</span>
<span class="k">subroutine </span><span class="n">my_run</span><span class="p">(</span><span class="n">x</span><span class="p">,</span><span class="n">y</span><span class="p">,</span><span class="n">z</span><span class="p">,</span><span class="n">title</span><span class="p">,</span><span class="n">l</span><span class="p">,</span><span class="n">l_</span><span class="p">)</span><span class="w"></span>
<span class="c">! nothing about commandline parsing here!</span>
<span class="kt">real</span><span class="p">,</span><span class="k">intent</span><span class="p">(</span><span class="n">in</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">x</span><span class="p">,</span><span class="n">y</span><span class="p">,</span><span class="n">z</span><span class="w"></span>
<span class="kt">character</span><span class="p">(</span><span class="nb">len</span><span class="o">=*</span><span class="p">),</span><span class="k">intent</span><span class="p">(</span><span class="n">in</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">title</span><span class="w"></span>
<span class="kt">logical</span><span class="p">,</span><span class="k">intent</span><span class="p">(</span><span class="n">in</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">l</span><span class="w"></span>
<span class="kt">logical</span><span class="p">,</span><span class="k">intent</span><span class="p">(</span><span class="n">in</span><span class="p">)</span><span class="w"> </span><span class="kd">::</span><span class="w"> </span><span class="n">l_</span><span class="w"></span>
<span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="s1">'MY_RUN'</span><span class="w"></span>
<span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="s1">'x,y,z .....'</span><span class="p">,</span><span class="n">x</span><span class="p">,</span><span class="n">y</span><span class="p">,</span><span class="n">z</span><span class="w"></span>
<span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="s1">'title .... '</span><span class="p">,</span><span class="n">title</span><span class="w"></span>
<span class="w"> </span><span class="k">write</span><span class="p">(</span><span class="o">*</span><span class="p">,</span><span class="o">*</span><span class="p">)</span><span class="s1">'l,l_ ..... '</span><span class="p">,</span><span class="n">l</span><span class="p">,</span><span class="n">l_</span><span class="w"></span>
<span class="k">end subroutine </span><span class="n">my_run</span><span class="w"></span>
<span class="k">end program </span><span class="n">demo6</span><span class="w"></span>
</pre></div>
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<div class="col-xs-6 col-md-6"><p>M_CLI2 was developed by John S. Urban<br>© 2023
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Documentation generated by
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