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Stevo Slavic commented on MNG-4752: ----------------------------------- Spotted some workarounds like [this|http://www.mindbug.org/2009/02/adding-endorsements-to-mavens-plugins.html] where combination of maven-dependency-plugin:copy and maven-compiler-plugin are used to copy endorsed artifacts in target/endorsed, and configure compiler to use that dir as endorsed libs dir. Native support for endorsed scope is preferred - compared to native support, workaround is ugly, and it's even uglier if one is using Eclipse IDE and m2e. > <scope>endorsed</scope> > ----------------------- > > Key: MNG-4752 > URL: https://jira.codehaus.org/browse/MNG-4752 > Project: Maven 2 & 3 > Issue Type: New Feature > Components: Dependencies > Affects Versions: 2.2.1 > Environment: An issue in 2.2.1 but I think the same issue applies > also to 3.0. > Reporter: Jesse Glick > Fix For: Issues to be reviewed for 3.x > > > There appears to be no official way to request usage of a particular Java > library (such as a new release of JAXB) using the Java "endorsed" mechanism. > The semantics would be very similar to provided scope except that the library > is expected to override the JRE's boot classpath, both at compile time (main > or test) and runtime ({{exec:exec}} and Surefire). > As investigated in https://netbeans.org/bugzilla/show_bug.cgi?id=185139#c8 > there are various ways you can get this functionality to work in current > Maven releases if you Google long enough, but all seem hackish. Prepending > arguments to the bootclasspath directly is generally discouraged. > Manually configuring {{-endorseddirs}} (for {{javac}}) or > {{-Djava.endorsed.dirs}} (for {{java}} incl. Surefire) seems to work, but you > have to first download the endorsed libraries into some subdirectory of > target, where they could consume considerable disk space. > You could fix the disk space issue by passing dirs in the local repository, > but this requires hardcoding details of the {{~/.m2/repository/}} structure > in the POM which is very ugly, and also means duplicating information about > {{groupId}}, {{artifactId}}, and {{version}} (you still need to have > artifacts declared elsewhere so they will get downloaded if not initially > present). > Anyway all these tricks obscure the relatively simple intent of the > developer, which is to use a given artifact in the project in preference to > any equivalent in the current JRE. It is important to have a standardized way > of declaring such dependencies, not just to make it easy to write and > maintain {{pom.xml}}, but so that IDEs and other tools know what you intend > to do and can (for example) offer appropriate code completion without reverse > engineering various idioms. > Much preferable would be to simply declare these dependencies in the normal > POM section, but with {{<scope>endorsed</scope>}}. Then > {{maven-compiler-plugin}}, {{maven-exec-plugin}}, {{maven-surefire-plugin}}, > etc. would need to be modified to understand these dependencies and use them > appropriately when calling JDK tools. Plugin code could be smart enough to > work optimally in the available environment; for example, if an artifact has > only a single JAR in the local repository (no extra classifiers), the > containing directory could be passed directly to JDK tools as an endorsed > dir, but in other cases a {{target/endorsed}} dir could be generated and used > instead. > One concern is that the notion of an endorsed library is quite specific to > the JVM; Maven projects targeted at other platforms would presumably have no > use for this scope. Perhaps this is not an issue. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators: https://jira.codehaus.org/secure/ContactAdministrators!default.jspa For more information on JIRA, see: http://www.atlassian.com/software/jira