Attempt at fixing enforce***

src/main/java/org/gradlex/jvm/dependency/conflict/resolution/Log4J2EnforcementSubstitutionsUsing.java

@@ -0,0 +1,22 @@
+package org.gradlex.jvm.dependency.conflict.resolution;
+
+import org.gradle.api.Action;
+import org.gradle.api.artifacts.Configuration;
+import org.gradle.api.artifacts.component.ComponentSelector;
+import org.gradlex.jvm.dependency.conflict.detection.rules.logging.LoggingModuleIdentifiers;
+
+public class Log4J2EnforcementSubstitutionsUsing implements Action<Configuration> {
+    @Override
+    public void execute(Configuration configuration) {
+        configuration.getResolutionStrategy().dependencySubstitution(substitution -> {
+            // TODO We are missing substitutions here
+
+            // TODO this is wrong, it cannot be a substitution for commons-logging. It must be a dependency addition
+            ComponentSelector jclOverLog4J = substitution.module(LoggingModuleIdentifiers.LOG4J_JCL.asFirstVersion());
+            substitution.substitute(substitution.module(LoggingModuleIdentifiers.COMMONS_LOGGING.moduleId)).using(jclOverLog4J);
+            substitution.substitute(substitution.module(LoggingModuleIdentifiers.LOG4J_JCL.moduleId)).using(jclOverLog4J);
+            substitution.substitute(substitution.module(LoggingModuleIdentifiers.SPRING_JCL.moduleId)).using(jclOverLog4J);
+
+        });
+    }
+}

src/main/java/org/gradlex/jvm/dependency/conflict/resolution/Logging.java

@@ -395,6 +395,8 @@ public void enforceLog4J2() {
         selectJCLImplementation(LoggingModuleIdentifiers.LOG4J_JCL.moduleId);
         selectLog4J12Implementation(LoggingModuleIdentifiers.LOG4J12API.moduleId);
 
+        getConfigurations().all(new Log4J2EnforcementSubstitutionsUsing());
+
     }
 
     /**

src/main/java/org/gradlex/jvm/dependency/conflict/resolution/Slf4JEnforcementSubstitutionsUsing.java

@@ -31,6 +31,7 @@ public void execute(Configuration configuration) {
 
             substitution.substitute(substitution.module(LoggingModuleIdentifiers.LOG4J_JUL.moduleId)).using(substitution.module(LoggingModuleIdentifiers.JUL_TO_SLF4J.asFirstVersion()));
 
+            // TODO this is wrong, it cannot be a substitution for commons-logging. It must be a dependency addition
             ComponentSelector jclOverSlf4J = substitution.module(LoggingModuleIdentifiers.JCL_OVER_SLF4J.asFirstVersion());
             substitution.substitute(substitution.module(LoggingModuleIdentifiers.COMMONS_LOGGING.moduleId)).using(jclOverSlf4J);
             substitution.substitute(substitution.module(LoggingModuleIdentifiers.LOG4J_JCL.moduleId)).using(jclOverSlf4J);

src/test/groovy/org/gradlex/jvm/dependency/conflict/test/logging/LoggingCapabilitiesPluginSelectionFunctionalTest.groovy

@@ -328,4 +328,42 @@ ${additional.collect { "                runtimeOnly(\"$it\")" }.join("\n")}
         then:
         outcomeOf(result, ':doIt') == SUCCESS
     }
+
+    def "issue 119"() {
+        given:
+        withBuildScript("""
+            plugins {
+                `java-library`
+                id("org.gradlex.jvm-dependency-conflict-resolution")
+            }
+
+            repositories {
+                mavenCentral()
+            }
+
+            jvmDependencyConflicts.logging {
+                enforceLog4J2()
+            }
+
+            dependencies {
+                implementation("log4j:log4j:1.2.17")
+                implementation("ch.qos.reload4j:reload4j:1.2.25")
+                implementation("org.slf4j:slf4j-api:2.0.13")
+                implementation("commons-logging:commons-logging:1.3.1")
+                implementation("org.apache.logging.log4j:log4j-api:2.23.1")
+                implementation("org.apache.logging.log4j:log4j-slf4j-impl:2.23.1")
+            }
+
+            tasks.register("doIt") {
+                doLast {
+                    println(configurations["runtimeClasspath"].files)
+                }
+            }
+""")
+        when:
+        def result = build(['doIt', 'dependencies', '--configuration', 'runtimeClasspath'])
+
+        then:
+        outcomeOf(result, ':doIt') == SUCCESS
+    }
 }