Thanks Wayne, that "-U" appeared to work. Now I started out the tutorial with the command mvn -U archetype:create \ -DgroupId=sample.plugin \ -DartifactId=maven-hello-plugin \ -DarchetypeGroupId=org.apache.maven.archetypes \ -DarchetypeArtifactId=maven-archetype-mojo
because the tutorial did not tell you where to place the files pom.xml and GreetingMojo.java. So I just put GreetingMojo down in the directly with the other java source code. Then I clobbered the pom.xml file with pom.xml from http://maven.apache.org/guides/plugin/guide-java-plugin-development.html. Below is my pom.xml which I copied from http://maven.apache.org/guides/plugin/guide-java-plugin-development.html . Below that are the results when I try to "mvn sample.plugin:maven-hello-plugin:1.0-SNAPSHOT:sayhi" as per the instructions. What am I doing wrong? I am not seeing "Hello, World". I believe I have copied the c:/dev/sandboxes/maven/sample-mojo/maven-hello-plugin/src/main/java/sample/p lugin/GreetingMojo.java correctly from that web page. So then when I realized that I executed the command " mvn -U archetype:create... " too soon and tried moving GreetingMojo.java to c:/dev/sandboxes/maven/sample-mojo/maven-hello-plugin/GreetingMojo.java and running the command again but that did not help. Thanks, Siegfried Here is my c:/dev/sandboxes/maven/sample-mojo/maven-hello-plugin/pom.xml. Does it need to begin with a <?xml version="1.0" encoding="utf-8"?> tag? Why not? <project xmlns="http://maven.apache.org/POM/4.0.0"; xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd";> <modelVersion>4.0.0</modelVersion> <groupId>sample.plugin</groupId> <artifactId>maven-hello-plugin</artifactId> <packaging>maven-plugin</packaging> <version>1.0-SNAPSHOT</version> <name>Sample Parameter-less Maven Plugin</name> <dependencies> <dependency> <groupId>org.apache.maven</groupId> <artifactId>maven-plugin-api</artifactId> <version>2.0</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>sample.plugin</groupId> <artifactId>maven-hello-plugin</artifactId> <version>1.0-SNAPSHOT</version> </plugin> </plugins> </build> </project> Here are the results: cd c:/dev/sandboxes/maven/sample-mojo/maven-hello-plugin/ mvn sample.plugin:maven-hello-plugin:1.0-SNAPSHOT:sayhi [INFO] Scanning for projects... [INFO] Cannot find mojo descriptor for: 'sample.plugin:maven-hello-plugin:1.0-SNAPSHOT:sayhi' - Treating as non-aggregator. [INFO] ---------------------------------------------------------------------------- [INFO] Building Sample Parameter-less Maven Plugin [INFO] task-segment: [sample.plugin:maven-hello-plugin:1.0-SNAPSHOT:sayhi] [INFO] ---------------------------------------------------------------------------- [INFO] ------------------------------------------------------------------------ [ERROR] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] A required plugin was not found: Plugin could not be found - check that the goal name is correct: Unable to download the artifact from any repository Try downloading the file manually from the project website. Then, install it using the command: mvn install:install-file -DgroupId=sample.plugin -DartifactId=maven-hello-plugin \ -Dversion=1.0-SNAPSHOT -Dpackaging=maven-plugin -Dfile=/path/to/file Alternatively, if you host your own repository you can deploy the file there: mvn deploy:deploy-file -DgroupId=sample.plugin -DartifactId=maven-hello-plugin \ -Dversion=1.0-SNAPSHOT -Dpackaging=maven-plugin -Dfile=/path/to/file \ -Durl=[url] -DrepositoryId=[id] sample.plugin:maven-hello-plugin:maven-plugin:1.0-SNAPSHOT from the specified remote repositories: central (http://repo1.maven.org/maven2) sample.plugin:maven-hello-plugin:maven-plugin:1.0-SNAPSHOT from the specified remote repositories: central (http://repo1.maven.org/maven2) [INFO] ------------------------------------------------------------------------ [INFO] For more information, run Maven with the -e switch [INFO] ------------------------------------------------------------------------ [INFO] Total time: < 1 second [INFO] Finished at: Fri Aug 31 00:04:30 MDT 2007 [INFO] Final Memory: 1M/4M [INFO] ------------------------------------------------------------------------ Compilation exited abnormally with code 1 at Fri Aug 31 00:04:30 -----Original Message----- From: Wayne Fay [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 29, 2007 3:56 PM To: Maven Users List Subject: Re: Trouble with mojo tutorial Try mvn -U ... to force an update. 1.0-alpha-5 was a "failed release". The only available versions are -4 and -6. Wayne On 8/29/07, siegfried <[EMAIL PROTECTED]> wrote: > I'm trying to follow the instructions at > http://maven.apache.org/guides/plugin/guide-java-plugin-development.html. > Below are the results. > > > > Am I experiencing some problem with the public maven repositories or is this > a bug in maven 2.0.7? (Or did I do something wrong?) > > > > What would be the wget command to get maven-archetype-creator:jar as the > error message suggests? > > > > Thanks, > > Siegfried > > > > > > > > > > > > > > > > cd c:/dev/sandboxes/maven/sample-mojo/ > > mvn archetype:create \ > > -DgroupId=sample.plugin \ > > -DartifactId=maven-hello-plugin \ > > -DarchetypeGroupId=org.apache.maven.archetypes \ > > -DarchetypeArtifactId=maven-archetype-mojo > > [INFO] Scanning for projects... > > [INFO] Searching repository for plugin with prefix: 'archetype'. > > [INFO] > ---------------------------------------------------------------------------- > > [INFO] Building Maven Default Project > > [INFO] task-segment: [archetype:create] (aggregator-style) > > [INFO] > ---------------------------------------------------------------------------- > > Downloading: > http://repo1.maven.org/maven2/org/apache/maven/archetype/maven-archetype-cor > e/1.0-alpha-5/maven-archetype-core-1.0-alpha-5.pom > > Downloading: > http://repo1.maven.org/maven2/org/apache/maven/archetype/maven-archetype-cor > e/1.0-alpha-5/maven-archetype-core-1.0-alpha-5.pom > > Downloading: > http://repo1.maven.org/maven2/org/apache/maven/archetype/maven-archetype-cre > ator/1.0-alpha-5/maven-archetype-creator-1.0-alpha-5.pom > > Downloading: > http://repo1.maven.org/maven2/org/apache/maven/archetype/maven-archetype-cre > ator/1.0-alpha-5/maven-archetype-creator-1.0-alpha-5.pom > > Downloading: > http://repo1.maven.org/maven2/org/apache/maven/archetype/maven-archetype-cre > ator/1.0-alpha-5/maven-archetype-creator-1.0-alpha-5.jar > > Downloading: > http://repo1.maven.org/maven2/org/apache/maven/archetype/maven-archetype-cre > ator/1.0-alpha-5/maven-archetype-creator-1.0-alpha-5.jar > > Downloading: > http://repo1.maven.org/maven2/org/apache/maven/archetype/maven-archetype-cor > e/1.0-alpha-5/maven-archetype-core-1.0-alpha-5.jar > > Downloading: > http://repo1.maven.org/maven2/org/apache/maven/archetype/maven-archetype-cor > e/1.0-alpha-5/maven-archetype-core-1.0-alpha-5.jar > > [INFO] > ------------------------------------------------------------------------ > > [ERROR] BUILD ERROR > > [INFO] > ------------------------------------------------------------------------ > > [INFO] Failed to resolve artifact. > > > > Missing: > > ---------- > > 1) org.apache.maven.archetype:maven-archetype-creator:jar:1.0-alpha-5 > > > > > > Try downloading the file manually from the project website. > > > > > > Then, install it using the command: > > mvn install:install-file -DgroupId=org.apache.maven.archetype > -DartifactId=maven-archetype-creator \ > > -Dversion=1.0-alpha-5 -Dpackaging=jar -Dfile=/path/to/file > > Alternatively, if you host your own repository you can deploy the file > there: mvn deploy:deploy-file -DgroupId=org.apache.maven.archetype > -DartifactId=maven-archetype-creator \ > > -Dversion=1.0-alpha-5 -Dpackaging=jar -Dfile=/path/to/file \ > > -Durl=[url] -DrepositoryId=[id] > > > > > > Path to dependency: > > 1) > org.apache.maven.plugins:maven-archetype-plugin:maven-plugin:1.0-alpha-6 > > 2) > org.apache.maven.archetype:maven-archetype-creator:jar:1.0-alpha-5 > > > > > > 2) org.apache.maven.archetype:maven-archetype-core:jar:1.0-alpha-5 > > > > > > Try downloading the file manually from the project website. > > > > > > Then, install it using the command: > > mvn install:install-file -DgroupId=org.apache.maven.archetype > -DartifactId=maven-archetype-core \ > > -Dversion=1.0-alpha-5 -Dpackaging=jar -Dfile=/path/to/file > > Alternatively, if you host your own repository you can deploy the file > there: mvn deploy:deploy-file -DgroupId=org.apache.maven.archetype > -DartifactId=maven-archetype-core \ > > -Dversion=1.0-alpha-5 -Dpackaging=jar -Dfile=/path/to/file \ > > -Durl=[url] -DrepositoryId=[id] > > > > > > Path to dependency: > > 1) > org.apache.maven.plugins:maven-archetype-plugin:maven-plugin:1.0-alpha-6 > > 2) > org.apache.maven.archetype:maven-archetype-core:jar:1.0-alpha-5 > > > > > > ---------- > > 2 required artifacts are missing. > > > > for artifact: > > org.apache.maven.plugins:maven-archetype-plugin:maven-plugin:1.0-alpha-6 > > > > > > from the specified remote repositories: > > apache.snapshots (http://people.apache.org/repo/m2-snapshot-repository), > > central (http://repo1.maven.org/maven2) > > > > > > > > [INFO] > ------------------------------------------------------------------------ > > [INFO] For more information, run Maven with the -e switch > > [INFO] > ------------------------------------------------------------------------ > > [INFO] Total time: 6 seconds > > [INFO] Finished at: Wed Aug 29 13:09:04 MDT 2007 > > [INFO] Final Memory: 2M/4M > > [INFO] > ------------------------------------------------------------------------ > > > > Compilation exited abnormally with code 1 at Wed Aug 29 13:09:05 > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: 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