Applying next tag for Maven SNAPSHOT builds

[mcantrell]

Environment:

• Jib version: 3.4.4
• Build tool: Maven
• OS: MacOS

Description:
I'm attempting to define a phase tag that indicates the type of release for the image.

• next for SNAPSHOT builds
• latest for release builds

I haven't found any explicit configrations in the Jib documentation that allows for this, so I'm hoping to use a Maven profile or some other mechanism to set the jib.phase.tag property based on the project version.

All of my attempts to do this have failed. I'm wondering if this might be a feature request for Jib to support conditional tags based on the project version type.

Attempted Configrations:

Main plugin configuration in pom.xml:

<properties>
    <maven.build.timestamp.format>yyyyMMdd-HHmmss-SSS</maven.build.timestamp.format>
    <jib.phase.tag>latest</jib.phase.tag>
    <jib.image>**redacted**/${project.artifactId}:${jib.phase.tag}</jib.image>
</properties>
<plugin>
    <groupId>com.google.cloud.tools</groupId>
    <artifactId>jib-maven-plugin</artifactId>
    <version>3.4.4</version>
    <executions>
        <execution>
            <phase>package</phase>
            <goals>
                <goal>build</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <from>
            <image>eclipse-temurin:21</image>
        </from>
        <to>
            <image>${jib.image}</image>
            <tags>
                <tag>${project.version}-${maven.build.timestamp}</tag>
                <tag>${project.version}</tag>
            </tags>
        </to>
        <container>
            <jvmFlags>
                <jvmFlag>-XX:MaxRAMPercentage=80.0</jvmFlag>
                <jvmFlag>-XX:MinRAMPercentage=80.0</jvmFlag>
            </jvmFlags>
        </container>
    </configuration>
</plugin>

I haven't found a way to do this with standard maven profiles because you can't use wildcard/regex patterns to detect -SNAPSHOT in the project.version:

<!-- this will not work -->
<profiles>
    <profile>
        <id>snapshot-build</id>
        <activation>
            <property>
                <name>project.version</name>
                <value>.*-SNAPSHOT</value>
            </property>
        </activation>
        <properties>
            <jib.phase.tag>next</jib.phase.tag>
        </properties>
    </profile>
</profiles>

I've also tried the build-helper-maven-plugin to set the property but the tag always ends up as latest:

<plugin>
    <groupId>org.codehaus.mojo</groupId>
    <artifactId>build-helper-maven-plugin</artifactId>
    <executions>
        <execution>
            <id>set-jib-phase-tag-for-snapshot</id>
            <goals>
                <goal>regex-property</goal>
            </goals>
            <configuration>
                <name>jib.phase.tag</name>
                <value>${project.version}</value>
                <regex>.*-SNAPSHOT</regex>
                <replacement>next</replacement>
                <failIfNoMatch>false</failIfNoMatch>
            </configuration>
        </execution>
    </executions>
</plugin>

Value

While the latest tag is usually used to indicate the latest stable release, next (npm naming convention) is used to indicate the latest development release.

It seems like maybe this would be a nice feature for Jib to support with a configuration option.

[mcantrell]

I believe I have a solution using some scripting for our CI server which detects the SNAPSHOT version and supplies the maven property for Jib to use:

# Get the project version from Maven
VERSION=$(mvn help:evaluate -Dexpression=project.version -q -DforceStdout)

# Determine the jib.phase.tag based on version
if [[ "$VERSION" == *"-SNAPSHOT" ]]; then
    JIB_TAG="next"
else
    JIB_TAG="latest"
fi

echo "Building ${MODULE_NAME} with version: ${VERSION}, tag: ${JIB_TAG}"

mvn package -pl ${MODULE_NAME} -am -Djib.phase.tag=${JIB_TAG}

I don't think this is a bad solution but maybe a jib feature for this would still be a nice thing to have.