Add skipMavenRc to ExecutorRequest and use it in ITs

impl/maven-executor/src/main/java/org/apache/maven/api/cli/ExecutorRequest.java

@@ -144,6 +144,13 @@ public interface ExecutorRequest {
      */
     Optional<OutputStream> stdErr();
 
+    /**
+     * Indicate if {@code ~/.mavenrc} should be skipped during execution.
+     * <p>
+     * Affected only for forked executor by adding MAVEN_SKIP_RC environment variable
+     */
+    boolean skipMavenRc();
+
     /**
      * Returns {@link Builder} created from this instance.
      */
@@ -160,7 +167,8 @@ default Builder toBuilder() {
                 jvmArguments().orElse(null),
                 stdIn().orElse(null),
                 stdOut().orElse(null),
-                stdErr().orElse(null));
+                stdErr().orElse(null),
+                skipMavenRc());
     }
 
     /**
@@ -182,7 +190,8 @@ static Builder mavenBuilder(@Nullable Path installationDirectory) {
                 null,
                 null,
                 null,
-                null);
+                null,
+                false);
     }
 
     class Builder {
@@ -197,6 +206,7 @@ class Builder {
         private InputStream stdIn;
         private OutputStream stdOut;
         private OutputStream stdErr;
+        private boolean skipMavenRc;
 
         private Builder() {}
 
@@ -212,7 +222,8 @@ private Builder(
                 List<String> jvmArguments,
                 InputStream stdIn,
                 OutputStream stdOut,
-                OutputStream stdErr) {
+                OutputStream stdErr,
+                boolean skipMavenRc) {
             this.command = command;
             this.arguments = arguments;
             this.cwd = cwd;
@@ -224,6 +235,7 @@ private Builder(
             this.stdIn = stdIn;
             this.stdOut = stdOut;
             this.stdErr = stdErr;
+            this.skipMavenRc = skipMavenRc;
         }
 
         @Nonnull
@@ -333,6 +345,12 @@ public Builder stdErr(OutputStream stdErr) {
             return this;
         }
 
+        @Nonnull
+        public Builder skipMavenRc(boolean skipMavenRc) {
+            this.skipMavenRc = skipMavenRc;
+            return this;
+        }
+
         @Nonnull
         public ExecutorRequest build() {
             return new Impl(
@@ -346,7 +364,8 @@ public ExecutorRequest build() {
                     jvmArguments,
                     stdIn,
                     stdOut,
-                    stdErr);
+                    stdErr,
+                    skipMavenRc);
         }
 
         private static class Impl implements ExecutorRequest {
@@ -361,6 +380,7 @@ private static class Impl implements ExecutorRequest {
             private final InputStream stdIn;
             private final OutputStream stdOut;
             private final OutputStream stdErr;
+            private final boolean skipMavenRc;
 
             @SuppressWarnings("ParameterNumber")
             private Impl(
@@ -374,7 +394,8 @@ private Impl(
                     List<String> jvmArguments,
                     InputStream stdIn,
                     OutputStream stdOut,
-                    OutputStream stdErr) {
+                    OutputStream stdErr,
+                    boolean skipMavenRc) {
                 this.command = requireNonNull(command);
                 this.arguments = arguments == null ? List.of() : List.copyOf(arguments);
                 this.cwd = getCanonicalPath(requireNonNull(cwd));
@@ -386,6 +407,7 @@ private Impl(
                 this.stdIn = stdIn;
                 this.stdOut = stdOut;
                 this.stdErr = stdErr;
+                this.skipMavenRc = skipMavenRc;
             }
 
             @Override
@@ -443,6 +465,11 @@ public Optional<OutputStream> stdErr() {
                 return Optional.ofNullable(stdErr);
             }
 
+            @Override
+            public boolean skipMavenRc() {
+                return skipMavenRc;
+            }
+
             @Override
             public String toString() {
                 return getClass().getSimpleName() + "{" + "command='"
@@ -456,7 +483,8 @@ public String toString() {
                         + jvmArguments + ", stdinProvider="
                         + stdIn + ", stdoutConsumer="
                         + stdOut + ", stderrConsumer="
-                        + stdErr + '}';
+                        + stdErr + ", skipMavenRc="
+                        + skipMavenRc + "}";
             }
         }
     }

impl/maven-executor/src/main/java/org/apache/maven/cling/executor/forked/ForkedMavenExecutor.java

@@ -141,6 +141,10 @@ protected int doExecute(ExecutorRequest executorRequest) throws ExecutorExceptio
         }
         env.remove("MAVEN_ARGS"); // we already used it if configured to do so
 
+        if (executorRequest.skipMavenRc()) {
+            env.put("MAVEN_SKIP_RC", "true");
+        }
+
         try {
             ProcessBuilder pb = new ProcessBuilder()
                     .directory(executorRequest.cwd().toFile())

its/core-it-suite/pom.xml

@@ -538,6 +538,10 @@ under the License.
             <maven.home>${preparedMavenHome}</maven.home>
             <maven.it.global-settings.dir>${project.build.testOutputDirectory}</maven.it.global-settings.dir>
           </systemPropertyVariables>
+          <excludedEnvironmentVariables>
+            <excludedEnvironmentVariable>MAVEN_ARGS</excludedEnvironmentVariable>
+            <excludedEnvironmentVariable>MAVEN_OPTS</excludedEnvironmentVariable>
+          </excludedEnvironmentVariables>
         </configuration>
       </plugin>
       <plugin>

its/core-it-suite/src/test/java/org/apache/maven/it/TestSuiteOrdering.java

@@ -27,6 +27,7 @@
 import java.util.List;
 import java.util.Map;
 
+import org.apache.maven.cling.executor.ExecutorHelper;
 import org.junit.jupiter.api.ClassDescriptor;
 import org.junit.jupiter.api.ClassOrderer;
 import org.junit.jupiter.api.ClassOrdererContext;
@@ -66,10 +67,11 @@ private static void infoProperty(PrintStream info, String property) {
             Verifier verifier = new Verifier("");
             String mavenVersion = verifier.getMavenVersion();
             String executable = verifier.getExecutable();
+            ExecutorHelper.Mode defaultMode = verifier.getDefaultMode();
 
             out.println("Running integration tests for Maven " + mavenVersion + System.lineSeparator()
                     + "\tusing Maven executable: " + executable + System.lineSeparator()
-                    + "\twith verifier.forkMode: " + System.getProperty("verifier.forkMode", "not defined == fork"));
+                    + "\twith verifier.forkMode: " + defaultMode);
 
             System.setProperty("maven.version", mavenVersion);
 

its/core-it-support/maven-it-helper/src/main/java/org/apache/maven/it/Verifier.java

@@ -122,6 +122,8 @@ public class Verifier {
 
     private Path logFile;
 
+    private boolean skipMavenRc = true;
+
     public Verifier(String basedir) throws VerificationException {
         this(basedir, null);
     }
@@ -170,6 +172,10 @@ public void setExecutable(String executable) {
         this.executable = requireNonNull(executable);
     }
 
+    public ExecutorHelper.Mode getDefaultMode() {
+        return executorHelper.getDefaultMode();
+    }
+
     public void execute() throws VerificationException {
         List<String> args = new ArrayList<>(defaultCliArguments);
         for (String cliArgument : cliArguments) {
@@ -221,7 +227,8 @@ public void execute() throws VerificationException {
                     .cwd(basedir)
                     .userHomeDirectory(userHomeDirectory)
                     .jvmArguments(jvmArguments)
-                    .arguments(args);
+                    .arguments(args)
+                    .skipMavenRc(skipMavenRc);
             if (!systemProperties.isEmpty()) {
                 builder.jvmSystemProperties(new HashMap(systemProperties));
             }
@@ -337,6 +344,10 @@ public void setForkJvm(boolean forkJvm) {
         this.forkJvm = forkJvm;
     }
 
+    public void setSkipMavenRc(boolean skipMavenRc) {
+        this.skipMavenRc = skipMavenRc;
+    }
+
     public void setHandleLocalRepoTail(boolean handleLocalRepoTail) {
         this.handleLocalRepoTail = handleLocalRepoTail;
     }