Add Maven skip property to skip execution (#471)

Closes #445

Author: joschi

maven/pom.xml

@@ -43,6 +43,11 @@
       <artifactId>junit-jupiter</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.slf4j</groupId>
+      <artifactId>slf4j-simple</artifactId>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 
   <build>

maven/src/main/java/org/openapitools/openapidiff/maven/OpenApiDiffMojo.java

@@ -25,8 +25,16 @@ public class OpenApiDiffMojo extends AbstractMojo {
   @Parameter(property = "failOnChanged", defaultValue = "false")
   Boolean failOnChanged = false;
 
+  @Parameter(property = "skip", defaultValue = "false")
+  Boolean skip = false;
+
   @Override
   public void execute() throws MojoExecutionException, MojoFailureException {
+    if(Boolean.TRUE.equals(skip)) {
+      getLog().info("Skipping openapi-diff execution");
+      return;
+    }
+
     try {
       final ChangedOpenApi diff = OpenApiCompare.fromLocations(oldSpec, newSpec);
       getLog().info(new ConsoleRender().render(diff));

maven/src/test/java/org/openapitools/openapidiff/maven/OpenApiDiffMojoTest.java

@@ -75,4 +75,15 @@ void Should_BackwardIncompatibilityException_When_WantsExceptionAndSpecIsIncompa
 
     assertThrows(BackwardIncompatibilityException.class, mojo::execute);
   }
+
+  @Test
+  void Should_Skip_Mojo_WhenSkipIsTrue() {
+    final OpenApiDiffMojo mojo = new OpenApiDiffMojo();
+    mojo.oldSpec = new File("src/test/resources/newspec.yaml").getAbsolutePath();
+    mojo.newSpec = new File("src/test/resources/oldspec.yaml").getAbsolutePath();
+    mojo.failOnIncompatible = true;
+    mojo.skip = true;
+
+    assertDoesNotThrow(mojo::execute);
+  }
 }

pom.xml

@@ -146,6 +146,11 @@
                 <artifactId>jcl-over-slf4j</artifactId>
                 <version>${slf4j.version}</version>
             </dependency>
+            <dependency>
+                <groupId>org.slf4j</groupId>
+                <artifactId>slf4j-simple</artifactId>
+                <version>${slf4j.version}</version>
+            </dependency>
             <dependency>
                 <groupId>ch.qos.logback</groupId>
                 <artifactId>logback-classic</artifactId>