add fail-on-incompatible option

[mohamed-el-habib]

I'm a trying to use this tool into my maven build and i want to fail build only if API changes broke backward compatibility. I'm manage to get the old version into ${basedir}/target/api-old.yaml.

With the --state option (#36) the exit code is always 0, i have to parse the stdout to get the status and i don't have the detail of changes.
With the --fail-on-incompatible the exit code 1 if API changes broke backward compatibility.

<plugin>
	<artifactId>maven-antrun-plugin</artifactId>
	<version>1.8</version>
	<executions>
		<execution>
			<id>openapi-backward</id>
			<phase>validate</phase>
			<goals>
				<goal>run</goal>
			</goals>
			<configuration>
				<tasks>
					<java fork="true" failonerror="true" classname="com.qdesrame.openapi.diff.Main">
						<arg value="${basedir}/target/api-old.yaml" />
						<arg value="${project.basedir}/src/main/resources/api.yaml" />
						<arg value="--fail-on-incompatible" />
						<classpath refid="maven.plugin.classpath" />
					</java>
				</tasks>
			</configuration>
		</execution>
	</executions>
	<dependencies>
		<dependency>
			<groupId>com.qdesrame</groupId>
			<artifactId>openapi-diff</artifactId>
			<version>2.0.0-SNAPSHOT</version>
		</dependency>
	</dependencies>
</plugin>

[quen2404]

Thank you @mohamed-el-habib !