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From "Sergey Ponomarev (JIRA)" <j...@apache.org>
Subject [jira] [Created] (MNG-6661) Override project.build.directory via user property
Date Mon, 27 May 2019 21:15:00 GMT
Sergey Ponomarev created MNG-6661:
-------------------------------------

             Summary: Override project.build.directory via user property
                 Key: MNG-6661
                 URL: https://issues.apache.org/jira/browse/MNG-6661
             Project: Maven
          Issue Type: Improvement
          Components: core
            Reporter: Sergey Ponomarev


I would like to improve a build speed of a big project. The project uses a lot of IO operation
during a build. So I decided to put all /target directories into RAM disk while keeping sources
on a hard drive.
I mounted a RAM disk to /mnt/ramdisk and created a profile:
```
    <profile>
      <activation>
        <activeByDefault>true</activeByDefault>
      </activation>
      <id>ramDisk</id>
      <properties>
       <project.build.directory>/mnt/ramdisk/${project.groupId}/${project.artifactId}/target</project.build.directory>
      </properties>
    </profile>
```

In fact this is an equivalent of specifying -Dproject.build.directory
But unfortunately this doesn't work because the property here (i.e. "user property") is ignored.
To make it working I should add into pom.xml this:
{code}
  <build>
    <directory>${project.build.directory}</directory>
{code}

I.e. explicitly reuse the user property project.build.directory as configuration.

Don't be confused, we can call the user property anyhow e.g. ${ram_dir} but I just wan't to
reuse existing property.
I found a ticket that looks similar https://issues.apache.org/jira/browse/MNG-2598 but this
is another story.

So could we implement this?



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