Maven：未解决多模块项目依赖项（父pom）

Question

This is my maven project structure:

.
├── pom.xml
├── rep-digital-api
│   ├── pom.xml
│   └── src
└── rep-digital-common
    ├── pom.xml
    └── src

Parent ./pom.xml modules declaration is:

<groupId>net.gencat.transversal.repositori.digital</groupId>
<artifactId>rep-digital</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>pom</packaging>

<modules>
    <module>rep-digital-common</module>
    <module>rep-digital-api</module>
</modules>

Then, rep-digital-common has rep-digital as parent, ./rep-digital-common/pom.xml :

<artifactId>rep-digital-common</artifactId>
...
<parent>
    <groupId>net.gencat.transversal.repositori.digital</groupId>
    <artifactId>rep-digital</artifactId>
    <version>0.0.1-SNAPSHOT</version>
</parent>

So, rep-digital-api has rep-digital-common as dependency and rep-digital as parent:

<artifactId>rep-digital-api</artifactId>

<parent>
    <groupId>net.gencat.transversal.repositori.digital</groupId>
    <artifactId>rep-digital</artifactId>
    <version>0.0.1-SNAPSHOT</version>
</parent>
...     
<dependency>
    <groupId>net.gencat.transversal.repositori.digital</groupId>
    <artifactId>rep-digital-common</artifactId>
</dependency>

In order to make everything works, I first install rep-digital-common using mvn clean package install and it seems to be installed correctly on my local repository:

$ ls ~/.m2/repository/net/gencat/transversal/repositori/digital/rep-digital-common/
0.0.1-SNAPSHOT/  maven-metadata-local.xml

However, the problem appears when I'm trying to build rep-digital-api . The message is:

Could not find artifact net.gencat.transversal.repositori.digital:rep-digital:pom:0.0.1-SNAPSHOT

It seems mvn is not able to pick up parent pom...

The command I execute is: mvn clean package in ./rep-digital-api

Any ideas?

Answer 1

Sounds like there is no rep-digital artefact in your .m2 repository (or remotely). This implies to me that you did not cd rep-digital; mvn install cd rep-digital; mvn install . You can confirm this by looking inside .m2 and checking whether you do indeed have the rep-digital artefact installed locally.

Installing the parent rep-digital will create:

• an artefact .m2/repository/net.gencat.transversal.repositori.digital/rep-digital/1.0-SNAPSHOT/rep-digital-1.0-SNAPSHOT.pom
  • this is just a copy of rep-digital 's pom.xml
• a few maven-metadata-local.xml metadata files describing when each artefact was last updated

Installing the parent artefact will also install all the child artefacts.