Gradle plugin: optionally respect non-quarkus.* cache-relevant properties

devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/extension/QuarkusPluginExtension.java

@@ -17,6 +17,7 @@
 import org.gradle.api.file.FileCollection;
 import org.gradle.api.file.RegularFile;
 import org.gradle.api.plugins.JavaPlugin;
+import org.gradle.api.provider.ListProperty;
 import org.gradle.api.provider.MapProperty;
 import org.gradle.api.provider.Property;
 import org.gradle.api.provider.Provider;
@@ -254,6 +255,10 @@ public MapProperty<String, String> getQuarkusBuildProperties() {
         return quarkusBuildProperties;
     }
 
+    public ListProperty<String> getCachingRelevantProperties() {
+        return cachingRelevantProperties;
+    }
+
     public void set(String name, @Nullable String value) {
         quarkusBuildProperties.put(String.format("quarkus.%s", name), value);
     }

devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/AbstractQuarkusExtension.java

@@ -39,6 +39,7 @@ public abstract class AbstractQuarkusExtension {
     protected final Property<String> finalName;
     private final MapProperty<String, String> forcedPropertiesProperty;
     protected final MapProperty<String, String> quarkusBuildProperties;
+    protected final ListProperty<String> cachingRelevantProperties;
     private final ListProperty<String> ignoredEntries;
     private final FileCollection classpath;
     private final Property<BaseConfig> baseConfig;
@@ -52,6 +53,7 @@ protected AbstractQuarkusExtension(Project project) {
         this.finalName.convention(project.provider(() -> String.format("%s-%s", project.getName(), project.getVersion())));
         this.forcedPropertiesProperty = project.getObjects().mapProperty(String.class, String.class);
         this.quarkusBuildProperties = project.getObjects().mapProperty(String.class, String.class);
+        this.cachingRelevantProperties = project.getObjects().listProperty(String.class).value(List.of("quarkus[.].*"));
         this.ignoredEntries = project.getObjects().listProperty(String.class);
         this.ignoredEntries.convention(
                 project.provider(() -> baseConfig().packageConfig().userConfiguredIgnoredEntries.orElse(emptyList())));

devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/BaseConfig.java

@@ -1,6 +1,9 @@
 package io.quarkus.gradle.tasks;
 
+import java.util.List;
 import java.util.Map;
+import java.util.function.Predicate;
+import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
 import io.quarkus.deployment.pkg.PackageConfig;
@@ -18,7 +21,7 @@
 final class BaseConfig {
     private final Manifest manifest;
     private final PackageConfig packageConfig;
-    private final Map<String, String> quarkusProperties;
+    private final Map<String, String> configMap;
 
     // Note: EffectiveConfig has all the code to load the configurations from all the sources.
     BaseConfig(EffectiveConfig config) {
@@ -31,8 +34,7 @@ final class BaseConfig {
         manifest.attributes(packageConfig.manifest.attributes);
         packageConfig.manifest.manifestSections.forEach((section, attribs) -> manifest.attributes(attribs, section));
 
-        this.quarkusProperties = config.configMap().entrySet().stream().filter(e -> e.getKey().startsWith("quarkus."))
-                .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
+        configMap = config.configMap();
     }
 
     PackageConfig packageConfig() {
@@ -47,7 +49,12 @@ Manifest manifest() {
         return manifest;
     }
 
-    Map<String, String> quarkusProperties() {
-        return quarkusProperties;
+    Map<String, String> cachingRelevantProperties(List<String> propertyPatterns) {
+        List<Pattern> patterns = propertyPatterns.stream().map(s -> "^(" + s + ")$").map(Pattern::compile)
+                .collect(Collectors.toList());
+        Predicate<Map.Entry<String, ?>> keyPredicate = e -> patterns.stream().anyMatch(p -> p.matcher(e.getKey()).matches());
+        return configMap.entrySet().stream()
+                .filter(keyPredicate)
+                .collect(Collectors.toMap(Map.Entry::getKey, Map.Entry::getValue));
     }
 }

devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/EffectiveConfig.java

@@ -117,6 +117,9 @@ static Map<String, String> generateFullConfigMap(SmallRyeConfig config) {
     static SmallRyeConfig buildConfig(String profile, List<ConfigSource> configSources) {
         return ConfigUtils.emptyConfigBuilder()
                 .setAddDiscoveredSecretKeysHandlers(false)
+                // We add our own sources for environment, system-properties and microprofile-config.properties,
+                // no need to include those twice.
+                .setAddDefaultSources(false)
                 .withSources(configSources)
                 .withProfile(profile)
                 .build();

devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusBuildTask.java

@@ -15,6 +15,7 @@
 import org.gradle.api.file.FileCopyDetails;
 import org.gradle.api.file.FileSystemOperations;
 import org.gradle.api.logging.LogLevel;
+import org.gradle.api.provider.ListProperty;
 import org.gradle.api.tasks.Classpath;
 import org.gradle.api.tasks.Input;
 import org.gradle.api.tasks.StopExecutionException;
@@ -57,7 +58,8 @@ public FileCollection getClasspath() {
 
     @Input
     public Map<String, String> getCachingRelevantInput() {
-        return extension().baseConfig().quarkusProperties();
+        ListProperty<String> vars = extension().getCachingRelevantProperties();
+        return extension().baseConfig().cachingRelevantProperties(vars.get());
     }
 
     PackageConfig.BuiltInType packageType() {

devtools/gradle/gradle-application-plugin/src/main/java/io/quarkus/gradle/tasks/QuarkusGenerateCode.java

@@ -13,6 +13,7 @@
 import org.gradle.api.artifacts.Configuration;
 import org.gradle.api.file.DirectoryProperty;
 import org.gradle.api.file.FileCollection;
+import org.gradle.api.provider.ListProperty;
 import org.gradle.api.tasks.CacheableTask;
 import org.gradle.api.tasks.CompileClasspath;
 import org.gradle.api.tasks.Input;
@@ -65,7 +66,17 @@ public void setCompileClasspath(Configuration compileClasspath) {
 
     @Input
     public Map<String, String> getCachingRelevantInput() {
-        return extension().baseConfig().quarkusProperties();
+        ListProperty<String> vars = extension().getCachingRelevantProperties();
+        return extension().baseConfig().cachingRelevantProperties(vars.get());
+    }
+
+    @Input
+    Map<String, String> getInternalTaskConfig() {
+        // Necessary to distinguish the different `quarkusGenerateCode*` tasks, because the task path is _not_
+        // an input to the cache key. We need to declare these properties as inputs, because those influence the
+        // execution.
+        // Documented here: https://docs.gradle.org/current/userguide/build_cache.html#sec:task_output_caching_inputs
+        return Map.of("launchMode", launchMode.name(), "inputSourceSetName", inputSourceSetName);
     }
 
     @InputFiles