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From Ron Wheeler <>
Subject Re: Is it possible to execute a POM with a different basedir?
Date Fri, 14 Jun 2013 12:51:17 GMT
On 14/06/2013 6:02 AM, Jörg Schaible wrote:
> Hi David,
> David P. Caldwell wrote:
>> The use case is that I have a project (actually, many projects, so I
>> want to be able to do this in bulk) that are source-controlled and I'd
>> like to be able to create a modified version of the POM in a temporary
>> directory and then execute that modified POM, but against the original
>> base directory without altering the source-controlled POM in my
>> source-controlled working directory.

What is the problem that you are actually trying to solve?

>> Obviously I could do this by copying the entire source tree and then
>> running my modified POM, but I'd like to do this without having to
>> copy every file every time, as these projects are often large and I
>> want to be able to execute this tool routinely.
>> My initial attempt was to set -Dbasedir on the command line, but this
>> does not appear to have the effect for which I was hoping.
>> I can think of several imperfect workarounds, including copying the
>> entire source directory (expensive), generating a temporary file in
>> the base directory (make sure not to commit it!), overwriting the POM
>> (then need to repeatedly refresh from source control to restore the
>> original), and reading and remembering the POM, overwriting it with
>> the updated version, running Maven, and then overwriting the updates
>> with the original (hope the process doesn't crash in a way that
>> prevents me from restoring the original). I'd probably lean toward the
>> last but it's more cumbersome and error-prone than I'd like. Is what
>> I'd like possible?
> You cannot modify the basedir, i.e your generated POM has to be at same
> location with a different name. You might select a name pattern that is
> ignored by your SCM e.g. pom.tmp. As Jeff said, call Maven like
> mvn -f pom.tmp
> However, keep in mind that this does not work in multi-project modules,
> since the modules will always refer the original parent, unless you
> overwrite the relativePath element (IIRC you can also define a POM file
> directly).
> - Jörg
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Ron Wheeler
Artifact Software Inc
skype: ronaldmwheeler
phone: 866-970-2435, ext 102

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