Is the "<optional>" tag valid in the dependencyManagement element?

Question

I am a bit confused about how the mechanism for additional dependencies works in Maven. It seems that optional dependencies only work when specifying directly, and not through Dependency Management.

---

I created three test projects p1-p3 with dependencies:

• p3 depends on p2
• p2 depends on p1

If I declare the dependency as optional in the element , this one works as expected . POM for p2: <dependencies>

<dependencies>
  <dependency>
    <groupId>testgroup</groupId>
    <artifactId>p1</artifactId>
    <version>1.0-SNAPSHOT</version>
    <optional>true</optional>
  </dependency>
</dependencies>

Result : p3 is built in p2, but not p1.

However, if I If I declare the dependency as optional in the element , it seems to be ignored . POM for p2: <dependencyManagement>

<dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>testgroup</groupId>
      <artifactId>p1</artifactId>
      <version>1.0-SNAPSHOT</version>
      <optional>true</optional>
    </dependency>
  </dependencies>
</dependencyManagement>

<dependencies>
  <dependency>
    <groupId>testgroup</groupId>
    <artifactId>p1</artifactId>
  </dependency>
</dependencies>

: p3 p2 p1.

---

? .

:

• Maven 3.0.3 3.2.1.
• , p3 p1, mvn dependency:tree, , mvn -X ( ).
• <dependencyManagement> POM p1 p2. , .. <optional> .

Answer 1

MNG-1630. "", :

, . , r354544, , DefaultArtifactCollector DefaultModelDefaultsInjector, / .

(MNG-5632), , .