Maven

<profile>
    <id>ext</id>
    <activation>
        <file>
            <missing>${basedir}/ext</missing>
        </file>
    </activation>
</profile>

Distribution

<settings>
    [...]
    <profiles>
        <profile>
        <id>nex</id>
        <properties>
            <altSnapshotDeploymentRepository>snapshots::default::https://nex.chorke.org/repository/maven/snapshots</altSnapshotDeploymentRepository>
            <altReleaseDeploymentRepository>releases::default::https://nex.chorke.org/repository/maven/releases</altReleaseDeploymentRepository>
        </properties>
        </profile>
    </profiles>
</settings>

References

• Externalized Maven Distribution Management
• File specification used to activate the profile
• Activate a Maven Profile if missing a file
• Maven Deploy Optional Parameters
• Maven Encrypt Master Password
• Bazel