How do I exclude all instances of a transitive dependency when using Gradle

Question

My gradle project uses the application plugin to build a jar file  As part of the runtime transitive dependencies  I end up pulling in org slf4j slf4j-log4j12   It s referenced as a sub-transitive dependency in at least 5 or 6 other transitive dependencies - this project is using spring and hadoop  so everything but the kitchen sink is getting pulled in    no wait    that s there too        I want to globally exclude the slf4j-log4j12 jar from my built jar  So I ve tried this   configurations     runtime exclude group   org slf4j   name   slf4j-log4j12      However  this seems to exclude all org slf4j artifacts including slf4j-api  When running under debug mode I see lines such as   org slf4j slf4j-api is excluded from com pivotal gfxd gfxd-demo-mapreduce 1 0 runtime   org slf4j slf4j-simple is excluded from com pivotal gfxd gfxd-demo-mapreduce 1 0 runtime   org slf4j slf4j-log4j12 is excluded from org apache hadoop hadoop-common 2 2 0 runtime     I do not want to have to look up the source of each slf4j-log4j12 transitive dependency and then have individual compile foo   exclude slf4j      statements in my dependencies block   Update   I did also try this   configurations     runtime exclude name   slf4j-log4j12      Which ends up excluding everything from the build  As though I specified group        Update 2   I m using Gradle version 1 10 for this

User · Answer

in the example below I exclude

spring-boot-starter-tomcat

compile("org.springframework.boot:spring-boot-starter-web") {
     //by both name and group
     exclude group: 'org.springframework.boot', module: 'spring-boot-starter-tomcat' 
}

User · Answer

In addition to what  berguiga-mohamed-amine stated  I just found that a wildcard requires leaving the module argument the empty string   compile   com github jsonld-java jsonld-java  jsonldJavaVersion         exclude group   org apache httpcomponents   module         exclude group   org slf4j   module

User · Answer

For excluding one or more library globally add the following to your build gradle  configurations all      exclude group  org apache geronimo specs   module   geronimo-servlet 2 5 spec     exclude group  ch qos logback   module  logback-core      Now the exclude block has two properties group and module  For those of you coming from maven background  group is same as groupId and module is same as artifactId  Example  To exclude com mchange c3p0 0 9 2 1 following should be exclude block   exclude group  com mchange   module  c3p0

User · Answer

I was using spring boot 1 5 10 and tries to exclude logback  the given solution above did not work well  I use configurations instead  configurations all       exclude group   org springframework boot   module  spring-boot-starter-logging

User · Answer

Ah  the following works and does what I want   configurations     runtime exclude group   org slf4j   module   slf4j-log4j12      It seems that an Exclude Rule only has two attributes - group and module   However  the above syntax doesn t prevent you from specifying any arbitrary property as a predicate  When trying to exclude from an individual dependency you cannot specify arbitrary properties  For example  this fails   dependencies     compile   org springframework data spring-data-hadoop-core 2 0 0 M4-hadoop22         exclude group   org slf4j   name   slf4j-log4j12          with  No such property  name for class  org gradle api internal artifacts DefaultExcludeRule   So even though you can specify a dependency with a group  and name  you can t specify an exclusion with a name      Perhaps a separate question  but what exactly is a module then  I can understand the Maven notion of groupId artifactId version  which I understand translates to group name version in Gradle  But then  how do I know what module  in gradle-speak  a particular Maven artifact belongs to

User · Answer

Your approach is correct   Depending on the circumstances  you might want to use configurations all   exclude         If these excludes really exclude more than a single dependency  I haven t ever noticed that when using them   please file a bug at http   forums gradle org  ideally with a reproducible example

[java] How do I exclude all instances of a transitive dependency when using Gradle?

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