Megatest

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include::megatest-test-stages.dot[]
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.How to check variable values and inspect logs at each stage
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|======================
|Stage	                    | How to inspect                               | Watch for or try ...
|A: post config processing  | megatest -show-config -target your/target	   | #f (failed var processing)
|B: post runconfig          | megatest -show-runconfig -target your/target | Add -debug 0,9 to see which file your settings come from
|C: processing testconfigs  | inspect output from "megatest -run ..."      | Messages indicating issues process configs, dependency problems
|D: process testconfig for test launch | inspect output from megatest runner | Zero items (items expansion yielded no items)
|E,F: launching test        | start test xterm, look at mt_launch.log      | Did your batch system accept the job? Has the job landed on a machine? 
|G: starting test           | look at your batch systems logs for the process | Did the megatest -execute process start and run? Extract the "megatest -execute ..." command and run it from your xterm.
|H,H1,H2: step exectution   | look at <stepname>.log, <stepname>.html and your own internal logs | Do you have sufficiently tight logpro rules? You must always have a "required" rule! 
|======================

Bisecting megatest.csh/sh
^^^^^^^^^^^^^^^^^^^^^^^^^

Sometimes finding the environment variable that is causing the problem

-----------------

When this test is run an xterm will pop up. In that xterm the
environment is exactly that in which the script "getcellnames.sh"
would run. You can now debug the script to find out why it isn't
working as expected.

Similarly in a script just call the xterm.
NOTE: This technique can be very helpful in debugging running of EDA tools in Perl, Ruby, Python or tcl scripts:

.Perl example
..............................
some_code();
$cmdline="virtuoso -some-switches and params ...";
print "$cmdline"; # print the command line so you can paste it into the xterm that pops up

...................

In scripts just insert the commands, this example helps you identify
if "some commands ..." changed any environment variables.:

.myscript.sh
..............................
env | sort > somefile-before.log
some commands ...
env | sort > somefile-after.log
..............................

.Use meld to examine the differences
..............................
meld somefile-before.log somefile-after.log
..............................

Oneshot Modifying a Variable
^^^^^^^^^^^^^^^^^^^^^^^^^^^^

To try various values for a variable without mutating the current value

.within a bash shell
..............................
SOMEVAR=123 runcmd.sh
..............................

.within csh
..............................
(setenv SOMEVAR 123;runcmd.sh)

# OR

env SOMEVAR=123 runcmd.sh
..............................

Capturing output from a command
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

.Use the "script" utility
..............................
script -c "virtuoso -params and switches ..."
..............................

<col style="width:20%;">
<col style="width:40%;">
<col style="width:40%;">
<thead>
<tr>
<th class="tableblock halign-left valign-top" >Stage                      </th>
<th class="tableblock halign-left valign-top" > How to inspect                               </th>
<th class="tableblock halign-left valign-top" > Watch for or try &#8230;</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top" ><p class="tableblock">A: post config processing</p></td>
<td class="tableblock halign-left valign-top" ><p class="tableblock monospaced">megatest -show-config -target your/target</p></td>
<td class="tableblock halign-left valign-top" ><p class="tableblock monospaced">#f (failed var processing)</p></td>

<td class="tableblock halign-left valign-top" ><p class="tableblock">E,F: launching test</p></td>
<td class="tableblock halign-left valign-top" ><p class="tableblock monospaced">start test xterm, look at mt_launch.log</p></td>
<td class="tableblock halign-left valign-top" ><p class="tableblock monospaced">Did your batch system accept the job? Has the job landed on a machine?</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top" ><p class="tableblock">G: starting test</p></td>
<td class="tableblock halign-left valign-top" ><p class="tableblock monospaced">look at your batch systems logs for the process</p></td>
<td class="tableblock halign-left valign-top" ><p class="tableblock monospaced">Did the megatest -execute process start and run? Extract the "megatest -execute &#8230;" command and run it from your xterm.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top" ><p class="tableblock">H,H1,H2: step exectution</p></td>
<td class="tableblock halign-left valign-top" ><p class="tableblock monospaced">look at &lt;stepname&gt;.log, &lt;stepname&gt;.html and your own internal logs</p></td>
<td class="tableblock halign-left valign-top" ><p class="tableblock monospaced">Do you have sufficiently tight logpro rules? You must always have a "required" rule!</p></td>
</tr>
</tbody>

DEBUG [system xterm]
CELLNAME [system getcellnames.sh]</pre>
</div></div>
<div class="paragraph"><p>When this test is run an xterm will pop up. In that xterm the
environment is exactly that in which the script "getcellnames.sh"
would run. You can now debug the script to find out why it isn&#8217;t
working as expected.</p></div>
<div class="paragraph"><p>Similarly in a script just call the xterm.




NOTE: This technique can be very helpful in debugging running of EDA tools in Perl, Ruby, Python or tcl scripts:</p></div>


<div class="literalblock">
<div class="title">Perl example</div>
<div class="content monospaced">
<pre>some_code();
$cmdline="virtuoso -some-switches and params ...";
print "$cmdline"; # print the command line so you can paste it into the xterm that pops up
system("xterm");  # this line is added for the debug and removed when done

[system env | sort &gt; stagename.log]</pre>
</div></div>
<div class="paragraph"><p>In scripts just insert the commands, this example helps you identify
if "some commands &#8230;" changed any environment variables.:</p></div>
<div class="literalblock">
<div class="title">myscript.sh</div>
<div class="content monospaced">
<pre>env | sort &gt; somefile-before.log
some commands ...
env | sort &gt; somefile-after.log</pre>
</div></div>
<div class="literalblock">
<div class="title">Use meld to examine the differences</div>
<div class="content monospaced">
<pre>meld somefile-before.log somefile-after.log</pre>
</div></div>
</div>
<div class="sect3">
<h4 id="_oneshot_modifying_a_variable">Oneshot Modifying a Variable</h4>
<div class="paragraph"><p>To try various values for a variable without mutating the current value</p></div>
<div class="literalblock">
<div class="title">within a bash shell</div>
<div class="content monospaced">
<pre>SOMEVAR=123 runcmd.sh</pre>
</div></div>
<div class="literalblock">
<div class="title">within csh</div>
<div class="content monospaced">
<pre>(setenv SOMEVAR 123;runcmd.sh)

# OR

env SOMEVAR=123 runcmd.sh</pre>
</div></div>

</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_how_to_do_things">How To Do Things</h2>
<div class="sectionbody">