[jira] [Created] (MSHARED-437) maven-dependency-tree removes optional flag from managed dependencies

["Arlo Louis O'Keeffe (JIRA)" <ji...@apache.org>]

Arlo Louis O'Keeffe created MSHARED-437:
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             Summary: maven-dependency-tree removes optional flag from managed dependencies
                 Key: MSHARED-437
                 URL: https://issues.apache.org/jira/browse/MSHARED-437
             Project: Maven Shared Components
          Issue Type: Bug
          Components: maven-dependency-tree
    Affects Versions: maven-dependency-tree-2.2
            Reporter: Arlo Louis O'Keeffe
            Priority: Minor


Given the following [pom|https://github.com/evosec/export-dependencies-maven-plugin/blob/21d80e29bd2e3507e97556e6eeee5f2f962fb7b0/src/it/buck-bom-managed-optional-transitive-dependencies/pom.xml] the dependency tree looks like this

- com.mysema.querydsl:querydsl-core:jar:3.4.3:compile
-- com.google.guava:guava:jar:17.0:compile
-- com.google.code.findbugs:jsr305:jar:2.0.3:compile
-- com.mysema.commons:mysema-commons-lang:jar:0.2.4:compile
-- com.infradna.tool:bridge-method-annotation:jar:1.13:compile

You expect the entire tree to have the optional flag set to true. But sadly that's not the case. com.google.guava:guava and com.google.code.findbugs:jsr305 are optional = false.

I found that this is because they are managed dependencies (no difference whether imported or declared directly). When I use this [pom|https://github.com/evosec/export-dependencies-maven-plugin/blob/a931ee09c0880097b73e2010d71b000ede3acbfe/src/it/buck-optional-transitive-dependencies/pom.xml] it works.

There are some integration tests in this [repository|https://github.com/evosec/export-dependencies-maven-plugin] that demonstrate the issue. Checkout demonstrate-tree-bug branch and run "mvn verify". Now compare these files in target/it
- buck-bom-managed-optional-transitive-dependencies/target/BUCK
- buck-managed-optional-transitive-dependencies/target/BUCK
- buck-optional-transitive-dependencies/target/BUCK

[The CI builds demonstrating the failure|https://travis-ci.org/evosec/export-dependencies-maven-plugin/builds/81137480].

Let me know if I can help you reproduce the problem.



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