Switch a Gradle-based Vaadin 22 app to Vaadin 23 beta - gradle

Question

I am a Gradle newbie, having used Maven in the past.
I successfully established a Vaadin 22.0.5 project using the Vaadin Latest - Gradle starter project downloaded from Hello World Starters page. The project successfully builds and runs using gretty > apprun in IntelliJ 2021.1 EAP Ultimate edition.
👉 How do I alter the project to use the current beta version of the next version, Vaadin 23.0.0.beta2, as listed on the Vaadin releases page?
First attempt
I changed the gradle.properties file which consists of this single line:
vaadinVersion=22.0.5
… to this:
vaadinVersion=23.0.0.beta2
I clicked the floating windoid, Load Gradle Changes.
I immediately see this error appear in the IDE’s Build pane:
Build file '/Users/my_user/IdeaProjects/GetJava/build.gradle' line: 11
Plugin [id: 'com.vaadin', version: '23.0.0.beta2'] was not found in any of the following sources:
* Try:
> Run with --stacktrace option to get the stack trace.
> Run with --info or --debug option to get more log output.
> Run with --scan to get full insights.
Second attempt
After receiving Answer by cfrick, I did the following.
If found this at the top of the build.gradle file:
buildscript {
repositories {
maven { setUrl("https://maven.vaadin.com/vaadin-prereleases") }
maven { url "https://plugins.gradle.org/m2/" }
}
}
So I made no edits there, as seemed to be accomplishing the same thing as the first part of the Answer.
I changed the entirety of the settings.gradle file from this:
pluginManagement {
plugins {
id 'com.vaadin' version "${vaadinVersion}"
}
}
… to this:
pluginManagement {
repositories {
gradlePluginPortal()
maven {
url = "https://maven.vaadin.com/vaadin-prereleases"
}
}
plugins {
id 'com.vaadin' version "${vaadinVersion}"
}
}
I changed the gradle.properties file which consists of this single line:
vaadinVersion=22.0.5
… to this, using beta1 rather than beta2 seen above.
vaadinVersion=23.0.0.beta1
After executing Tasks > build > clean, I get a BUILD SUCCESSFUL message.
But when I execute Gretty > apprun, I get the following error message.
Execution failed for task ':compileJava'.
> Could not resolve all files for configuration ':compileClasspath'.
> Could not find com.vaadin:vaadin-bom:23.0.0.beta1.
Searched in the following locations:
- https://repo.maven.apache.org/maven2/com/vaadin/vaadin-bom/23.0.0.beta1/vaadin-bom-23.0.0.beta1.pom
If the artifact you are trying to retrieve can be found in the repository but without metadata in 'Maven POM' format, you need to adjust the 'metadataSources { ... }' of the repository declaration.
Required by:
project :
> Could not find com.vaadin:vaadin-core:.
Required by:
project :
Possible solution:
- Declare repository providing the artifact, see the documentation at https://docs.gradle.org/current/userguide/declaring_repositories.html

Answer 1

Pre-release versions are released first in Vaadins own pre-release
repository. You would have to add the repository if you need access to
releases, that have not yet hit the public repos:
In build.gradle expand repositories by:
repositories {
// ...
maven {
url = "https://maven.vaadin.com/vaadin-prereleases"
}
}
In the settings.gradle add a repositories block too:
pluginManagement {
repositories {
gradlePluginPortal()
maven {
url = "https://maven.vaadin.com/vaadin-prereleases"
}
}
plugins {
id 'com.vaadin' version "${vaadinVersion}"
}
}