debugging a build process - what works for you?

re: debugging a build process - what works for you?

Scott Sargent — Fri, 03 Sep 2004 01:50:00 GMT

Well, we're a small team but we build a diverse mix of software that all in all spans probably about 50K SLOC. That's vb (6.0, com objects & exes), asp pages, crystal reports, C++ Dlls and a slew of database updates. We've never really built an automated build system (although I've wanted to for quite a while). We use a series of batch scripts to build everything. With some simple options you can tell the batch script whether to get the latest from source control, or to use the source on the current hdd. We also let the builder choose which components to rebuild and which not to, this ultimately is how we debug what goes wrong as you're not constantly rebuilding everything and it simplifies the process. Its unfortunately a pretty manual process.

Scott

re: debugging a build process - what works for you?

Steve Loughran — Fri, 03 Sep 2004 12:37:00 GMT

ooh, that is an interesting question. Let's stop before deploying to make
it tractable.

A build process should be simple enough to be
comprehensible and manageable. Admittedly, what we have in smartfrog.org is
pushing the limit there, which is a sign that ant1.6's import task makes
things tricky.

1. builds create output, be they messages or tangible artifacts in the file system.

2. these can be tested. Assertions in the build process can probe for
things existing

3. you can also make assertions that stuff is there before you proceed.

<pre>
<target name="assert-smartfrog" depends="init-common"
description="verify smartfrog is present, fail if not">
<available
classname="org.smartfrog.SFSystem"
classpathref="smartfrog.classpath"
property="sfSystem.present"/>
<property name="sfjars.fullpath" refid="smartfrog.classpath"/>
<fail unless="sfSystem.present">
Smartfrog entry point not found in
${sfjars.fullpath}
</fail>
<echo level="verbose">Smartfrog found in ${smartfrog.dist.lib.dir}</echo>
</target>
</pre>

Here we also put something else out on the log for extra diags. So when
someone wants to find out what is going on they run ant -verbose, but
when it doesn't

One thing people have in make that ant doesnt replicate is the make -n
command, the dry run. Ant doesnt do it as dependency logic is not in the
runtime but in the tasks. If msbuild has sole ownership of the
dependencies and knows exactly which files will be created, then it
could replicate the -n behavior, which we sometimes get asked for.

The other technique is to do a clean build. That stops you worrying
about any dependency problems, and get on with creating stuff cleanly.
It also avoids the subtle problem of non-build artifacts getting into
the output tree, so nothing is replicable.

Finally, IntelliJ idea 4.5 does a great job of highlighting live syntax errors in a
build, offers basic refactoring, etc. That build files need refactoring
scares me, but IJ4.5 make it possible.

-Steve Loughran, Ant development team.

ps, hours? builds dont take hours. we are not talking C++ here :)

re: debugging a build process - what works for you?

David Levine — Fri, 03 Sep 2004 14:03:00 GMT

Our process only takes about 1/2 hour, but it includes all the steps you mentioned and a number of others as well.

The basic information we need is typically the step the build process was in, what file(s) it was operating on, and the cause of the failure. The build program captures standard output and standard error, so as much info as possible is presented to aid in trouble-shooting.

Currently the build process stops where it failed. All the information is there as to what it was doing at the instant of the failure and the step it was in. It also can rollback certain changes (such as auto-incrementing the assembly version in a shared AssemblyInfo.cs file).

re: debugging a build process - what works for you?

Jeff Atwood — Fri, 03 Sep 2004 21:36:00 GMT

Our build process is the "F5" key.

Sometimes I accidentally hit SHIFT+F5 though. Doh!

debugging a build process - what works for you?

debugging a build process - what works for you? — Mon, 26 Nov 2007 22:05:12 GMT

PingBack from http://feeds.maxblog.eu/item_213578.html

jeffcal s blogland debugging a build process what works for you | storage bench

jeffcal s blogland debugging a build process what works for you | storage bench — Sun, 14 Jun 2009 13:25:04 GMT

PingBack from http://thestoragebench.info/story.php?id=1180