java - Transitive dependencies coming from provided scope dependency -


i have added vaadin-client-compiler dependency provided scope dependency in vaadin application pom.

as have read, provided dependency not transitive, dependencies of vaadin-client-compiler should become dependencies of webapp.

but, found dependencies of vaadin-client-compiler (commons-lang3-3.1.jar) inside web-inf/lib directory.

also, these dependencies shown in mvn dependency:tree output well.

[info] |  +- javax.validation:validation-api:jar:1.0.0.ga:compile [info] |  \- javax.validation:validation-api:jar:sources:1.0.0.ga:compile [info] +- com.vaadin:vaadin-client-compiler:jar:7.6.4:provided [info] |  +- com.vaadin:vaadin-sass-compiler:jar:0.9.13:compile [info] |  |  \- com.yahoo.platform.yui:yuicompressor:jar:2.4.8:compile [info] |  |     \- rhino:js:jar:1.7r2:compile [info] |  +- commons-collections:commons-collections:jar:3.2.2:compile ................................................ ................................................. [info] |  +- commons-codec:commons-codec:jar:1.8:compile [info] |  +- commons-io:commons-io:jar:2.4:compile [info] |  +- org.apache.commons:commons-lang3:jar:3.1:compile

question: why did dependencies of provided scope dependency became dependencies of webapp?

indeed, according official maven dependency mediation, provided scope bring in transitive dependencies following:

  • transitive dependencies in compile scope > fetched provided scope
  • transitive dependencies in provided scope > ignored
  • transitive dependencies in runtime scope > fetched provided scope
  • transitive dependencies in test scope > ignored

hence, transitive dependencies of provided dependency either ignored or imported provided , such no part of final packaged war.

adding following dependency sample project:

<dependencies>     <dependency>         <groupid>com.vaadin</groupid>         <artifactid>vaadin-client-compiler</artifactid>         <version>7.6.4</version>         <scope>provided</scope>     </dependency> </dependencies>

would lead following, executing:

mvn dependency:tree -dincludes=com.vaadin

we have part of output:

[info] \- com.vaadin:vaadin-client-compiler:jar:7.6.4:provided [info]    +- com.vaadin:vaadin-shared:jar:7.6.4:provided [info]    +- com.vaadin:vaadin-server:jar:7.6.4:provided [info]    +- com.vaadin:vaadin-client:jar:7.6.4:provided [info]    +- com.vaadin:vaadin-sass-compiler:jar:0.9.13:provided [info]    \- com.vaadin:vaadin-client-compiler-deps:jar:1.2.0:provided

perfectly consistent documentation.

however, if add pom.xml file following:

<dependencymanagement>     <dependencies>         <dependency>             <groupid>com.vaadin</groupid>             <artifactid>vaadin-server</artifactid>             <version>7.6.4</version>             <scope>compile</scope>         </dependency>     </dependencies> </dependencymanagement>

note: overriding scope of 1 of transitive dependencies compile.

re-executing previous command have:

[info] \- com.vaadin:vaadin-client-compiler:jar:7.6.4:provided [info]    +- com.vaadin:vaadin-shared:jar:7.6.4:compile [info]    +- com.vaadin:vaadin-server:jar:7.6.4:compile [info]    +- com.vaadin:vaadin-client:jar:7.6.4:provided [info]    +- com.vaadin:vaadin-sass-compiler:jar:0.9.13:compile [info]    \- com.vaadin:vaadin-client-compiler-deps:jar:1.2.0:provided

which means: transitive dependency vaadin-server still brought in vaadin-client-compiler, scope @ compile per dependency management.

hence, should:

  • check whether pom.xml defines dependencymanagement section
  • check whether parent pom or pom in hierarchy so, executing mvn help:effective-pom -doutput=full-pom.xml help
  • check whether active profile influence build, executing mvn help:active-profiles help

-

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