Flow is not buildable with Maven 4

[edler-san]

Description of the bug

I have been testing Maven 4 RC2 on the flow project and it fails due to stricter rules on the usage of expressions.

[ERROR]   The project [inherited]:flow-project:pom:24.7-SNAPSHOT (C:\Users\foobar\Documents\GitHub\flow\pom.xml) has 3 errors
[ERROR]     'repositories.repository.[${flow.release.repo.id}].url' contains an expression but should be a constant. @ com.vaadin:flow-project:24.7-SNAPSHOT, file:///C:/Users/foobar/Documents/GitHub/flow/pom.xml, line 165, column 13
[ERROR]     'repositories.repository.[${flow.addons.repo.id}].url' contains an expression but should be a constant. @ com.vaadin:flow-project:24.7-SNAPSHOT, file:///C:/Users/foobar/Documents/GitHub/flow/pom.xml, line 172, column 13
[ERROR]     'pluginRepositories.pluginRepository.[${flow.release.repo.id}].url' contains an expression but should be a constant. @ com.vaadin:flow-project:24.7-SNAPSHOT, file:///C:/Users/foobar/Documents/GitHub/flow/pom.xml, line 191, column 13

Now, while that is easily fixable it reveals a lot of issues in upstream projects. (Output after fixing the above.)

[ERROR] Plugin org.apache.karaf.tooling:karaf-maven-plugin:4.3.9 or one of its dependencies could not be resolved:
[ERROR]         30 problems were encountered while building the effective model for org.apache.karaf.tooling:karaf-maven-plugin:maven-plugin:4.3.9
[ERROR]     - [ERROR] recursive variable reference: scm.connection
[ERROR]     - [ERROR] recursive variable reference: scm.developerConnection
[ERROR]     - [ERROR] recursive variable reference: scm.url
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.maven:maven-plugin-api:jar is missing. @ line 63, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.maven:maven-artifact:jar is missing. @ line 83, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.maven:maven-core:jar is missing. @ line 87, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.maven:maven-compat:jar is missing. @ line 97, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.maven.wagon:wagon-http:jar is missing. @ line 112, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.karaf:org.apache.karaf.util:jar is missing. @ line 116, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.slf4j:slf4j-jdk14:jar is missing. @ line 125, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.felix:maven-bundle-plugin:jar is missing. @ line 139, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.felix:org.apache.felix.fileinstall:jar is missing. @ line 175, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.karaf.features:org.apache.karaf.features.core:jar is missing. @ line 179, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.karaf.profile:org.apache.karaf.profile.core:jar is missing. @ line 189, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.felix:org.apache.felix.resolver:jar is missing. @ line 193, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.ops4j.pax.url:pax-url-wrap:jar:uber is missing. @ line 203, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.ops4j.pax.url:pax-url-aether:jar is missing. @ line 208, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.ops4j.pax.url:pax-url-war:jar:uber is missing. @ line 212, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.karaf.deployer:org.apache.karaf.deployer.spring:jar is missing. @ line 217, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.karaf.deployer:org.apache.karaf.deployer.blueprint:jar is missing. @ line 221, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.karaf.deployer:org.apache.karaf.deployer.features:jar is missing. @ line 225, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.karaf.deployer:org.apache.karaf.deployer.kar:jar is missing. @ line 229, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.karaf.kar:org.apache.karaf.kar.core:jar is missing. @ line 233, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.karaf.shell:org.apache.karaf.shell.console:jar is missing. @ line 237, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.karaf:org.apache.karaf.main:jar is missing. @ line 241, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.karaf.diagnostic:org.apache.karaf.diagnostic.boot:jar is missing. @ line 245, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.commons:commons-compress:jar is missing. @ line 249, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.osgi:osgi.core:jar is missing. @ line 253, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for org.apache.xbean:xbean-finder-shaded:jar is missing. @ line 258, column 9
[ERROR]     - [ERROR] 'dependencies.dependency.version' for jakarta.xml.bind:jakarta.xml.bind-api:jar is missing. @ line 262, column 9: Failed to read artifact descriptor for org.apache.karaf.tooling:karaf-maven-plugin:jar:4.3.9

Expected behavior

The build succeeding.

Minimal reproducible example

Check out flow repository and run mvn package using the latest Maven 4 release candidate.

Versions

• Vaadin / Flow version: 24.6, 24.7-SNAPSHOT
• Java version: 17.0.13
• OS version: Win 11