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.
Why?
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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