I've taken an approach which separates parents and aggregates. I've put all my parents into one eclipse project, each with a folder naming the parent, and in that folder, a pom.xml; this is of course a "flat" structure. These I then "mvn install" into my local repo, and/or deploy. I'm following the convention of labeling these with version like 1, 2, 3 ... see for instance the common apache pom (http://repo1.maven.org/maven2/org/apache/apache/7/apache-7.pom). Using m2eclipse you can select the folder containing a pom, right click, and pick the run -> mvn install to do this very easily (or from the main Eclipse run menu, once you do it once this right-click way, because it gets set up as an Eclipse run configuration).
The aggregate poms just do aggregation, and are not parents of anything. With this approach, I think that there is no need to have relativePath set. -Marshall On 4/27/2010 5:17 AM, subir.sasiku...@wipro.com wrote: > You need to add a <relativePath> for parent elements. Its mandatory in > Maven 3. > Add those and your builds should work. > > And you can always see other issues about compatibility by googling. > > Subir > > -----Original Message----- > From: Robert Einsle [mailto:rob...@einsle.de] > Sent: Tuesday, April 27, 2010 12:59 PM > To: Maven Users List > Subject: Different behavior of Maven 2 and 3 on Flat Projekt Layout > > Hy List, > > lets assume i have 3 Projects: > > xx.yy.app.parent > xx.yy.app.module1 > xx.yy.app.module2 > > .parent is Parent of both modules > > --- cut --- > <parent> > <artifactId>xx.yy.app.parent</artifactId> > <groupId>xx.yy.app</groupId> > <version>1.0.0-SNAPSHOT</version> > </parent> > <modelVersion>4.0.0</modelVersion> > <groupId>xx.yy.app</groupId> > <artifactId>xx.yy.app.module1</artifactId> > <version>1.0.0-SNAPSHOT</version> > <name>Module 1</name> > --- cut --- > > , in .parent the both modules are linked with: > > --- cut --- > <modules> > <module>../xx.yy.app.module1</module> > <module>../xx.yy.app.module2</module> > </modules> > --- cut --- > > Now i start "clean package" on Eclipse, my output is: > > --- cut --- > [INFO] Scanning for projects... > [ERROR] The build could not read 2 projects -> [Help 1] > [ERROR] The project xx.yy.app:xx.yy.app.module1:1.0.0-SNAPSHOT > (D:\Eclipse_Workspaces\maven-3.5.2\xx.yy.app.module1\pom.xml) has 1 > error > [ERROR] Non-resolvable parent POM > xx.yy.app:xx.yy.app.parent:1.0.0-SNAPSHOT for > xx.yy.app:xx.yy.app.module1:1.0.0-SNAPSHOT: Failed to resolve POM for > xx.yy.app:xx.yy.app.parent:1.0.0-SNAPSHOT due to Missing: > ---------- > 1) xx.yy.app:xx.yy.app.parent:pom:1.0.0-SNAPSHOT > ---------- > 1 required artifact is missing. > > for artifact: > xx.yy.app:xx.yy.app.parent:pom:1.0.0-SNAPSHOT > > from the specified remote repositories: > central (http://repo1.maven.org/maven2, releases=true, > snapshots=false) > -> [Help 2] > [ERROR] The project xx.yy.app:xx.yy.app.module2:1.0.0-SNAPSHOT > (D:\Eclipse_Workspaces\maven-3.5.2\xx.yy.app.module2\pom.xml) has 1 > error > [ERROR] Non-resolvable parent POM > xx.yy.app:xx.yy.app.parent:1.0.0-SNAPSHOT for > xx.yy.app:xx.yy.app.module2:1.0.0-SNAPSHOT: Failed to resolve POM for > xx.yy.app:xx.yy.app.parent:1.0.0-SNAPSHOT due to Missing: > ---------- > 1) xx.yy.app:xx.yy.app.parent:pom:1.0.0-SNAPSHOT > ---------- > 1 required artifact is missing. > > for artifact: > xx.yy.app:xx.yy.app.parent:pom:1.0.0-SNAPSHOT > > from the specified remote repositories: > central (http://repo1.maven.org/maven2, releases=true, > snapshots=false) > -> [Help 2] > [ERROR] > [ERROR] To see the full stack trace of the errors, re-run Maven with the > -e switch. > [ERROR] Re-run Maven using the -X switch to enable full debug logging. > [ERROR] > [ERROR] For more information about the errors and possible solutions, > please read the following articles: > [ERROR] [Help 1] > http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingExceptio > n > [ERROR] [Help 2] > http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelExcept > ion > --- cut --- > > when i run this on Maven 2.2.1 > > --- cut --- > [INFO] Scanning for projects... > [INFO] Reactor build order: > [INFO] Application Parent > [INFO] Module 1 > [INFO] Module 2 > [INFO] > ------------------------------------------------------------------------ > [INFO] Building Application Parent > [INFO] task-segment: [clean, package] > [INFO] > ------------------------------------------------------------------------ > [INFO] [clean:clean {execution: default-clean}] [INFO] > [site:attach-descriptor {execution: default-attach-descriptor}] [INFO] > ------------------------------------------------------------------------ > [INFO] Building Module 1 > [INFO] task-segment: [clean, package] > [INFO] > ------------------------------------------------------------------------ > [INFO] [clean:clean {execution: default-clean}] [INFO] Deleting > directory D:\Eclipse_Workspaces\maven-3.5.2\xx.yy.app.module1\target > [INFO] [resources:resources {execution: default-resources}] [WARNING] > Using platform encoding (Cp1252 actually) to copy filtered resources, > i.e. build is platform dependent! > [INFO] Copying 0 resource > [INFO] [compiler:compile {execution: default-compile}] [INFO] Nothing to > compile - all classes are up to date [INFO] [resources:testResources > {execution: default-testResources}] [WARNING] Using platform encoding > (Cp1252 actually) to copy filtered resources, i.e. build is platform > dependent! > [INFO] skip non existing resourceDirectory > D:\Eclipse_Workspaces\maven-3.5.2\xx.yy.app.module1\src\test\resources > [INFO] [compiler:testCompile {execution: default-testCompile}] [INFO] No > sources to compile [INFO] [surefire:test {execution: default-test}] > [INFO] No tests to run. > [INFO] [jar:jar {execution: default-jar}] [INFO] Building jar: > D:\Eclipse_Workspaces\maven-3.5.2\xx.yy.app.module1\target\xx.yy.app.mod > ule1-1.0.0-SNAPSHOT.jar > [INFO] > ------------------------------------------------------------------------ > [INFO] Building Module 2 > [INFO] task-segment: [clean, package] > [INFO] > ------------------------------------------------------------------------ > [INFO] [clean:clean {execution: default-clean}] [INFO] Deleting > directory D:\Eclipse_Workspaces\maven-3.5.2\xx.yy.app.module2\target > [INFO] [resources:resources {execution: default-resources}] [WARNING] > Using platform encoding (Cp1252 actually) to copy filtered resources, > i.e. build is platform dependent! > [INFO] Copying 0 resource > [INFO] [compiler:compile {execution: default-compile}] [INFO] Nothing to > compile - all classes are up to date [INFO] [resources:testResources > {execution: default-testResources}] [WARNING] Using platform encoding > (Cp1252 actually) to copy filtered resources, i.e. build is platform > dependent! > [INFO] skip non existing resourceDirectory > D:\Eclipse_Workspaces\maven-3.5.2\xx.yy.app.module2\src\test\resources > [INFO] [compiler:testCompile {execution: default-testCompile}] [INFO] No > sources to compile [INFO] [surefire:test {execution: default-test}] > [INFO] No tests to run. > [INFO] [jar:jar {execution: default-jar}] [INFO] Building jar: > D:\Eclipse_Workspaces\maven-3.5.2\xx.yy.app.module2\target\xx.yy.app.mod > ule2-1.0.0-SNAPSHOT.jar > [INFO] > [INFO] > [INFO] > ------------------------------------------------------------------------ > [INFO] Reactor Summary: > [INFO] > ------------------------------------------------------------------------ > [INFO] Application Parent .................................... SUCCESS > [3.453s] [INFO] Module 1 .............................................. > SUCCESS [1.953s] [INFO] Module 2 > .............................................. SUCCESS [0.125s] [INFO] > ------------------------------------------------------------------------ > [INFO] > ------------------------------------------------------------------------ > [INFO] BUILD SUCCESSFUL > [INFO] > ------------------------------------------------------------------------ > [INFO] Total time: 5 seconds > [INFO] Finished at: Tue Apr 27 09:21:48 CEST 2010 [INFO] Final Memory: > 14M/34M [INFO] > ------------------------------------------------------------------------ > --- cut --- > > The same behavoir i have running it on plain Maven. > > Does maven 3 don't allow flat multi project layout? > > how can i resolve this Problem? > > Thanks > > Robert > > --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@maven.apache.org For additional commands, e-mail: users-h...@maven.apache.org
