Add util to export derived config files from a schema file.

Can e.g. be used by C++ unit tests to generate required config files.

1 files changed, 52 insertions, 0 deletions

diff --git a/config-model/src/test/java/com/yahoo/schema/derived/SchemaToDerivedConfigExporter.java b/config-model/src/test/java/com/yahoo/schema/derived/SchemaToDerivedConfigExporter.java
new file mode 100644
index 00000000000..ec3381033dc
--- /dev/null
+++ b/config-model/src/test/java/com/yahoo/schema/derived/SchemaToDerivedConfigExporter.java
@@ -0,0 +1,52 @@
+// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+package com.yahoo.schema.derived;
+
+import com.yahoo.config.model.application.provider.MockFileRegistry;
+import com.yahoo.config.model.deploy.DeployState;
+import com.yahoo.config.model.deploy.TestProperties;
+import com.yahoo.document.config.DocumenttypesConfig;
+import com.yahoo.schema.ApplicationBuilder;
+import com.yahoo.schema.parser.ParseException;
+import com.yahoo.vespa.configmodel.producers.DocumentTypes;
+
+import java.io.IOException;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assumptions.assumeTrue;
+
+/**
+ * Utility class for deriving backend configs for a given schema and exporting them to a set of files.
+ *
+ * This can be used by e.g C++ unit tests to generate configs that are checked in as part of the test.
+ * Place the schema file in a directory $HOME/mydir and run the following in $HOME/git/vespa:
+ *   mvn test -Dtest=SchemaToDerivedConfigExporter -Dschema.exporter.path=$HOME/mydir -pl config-model
+ *
+ * Note that the directory path must be absolute.
+ *
+ * @author geirst
+ */
+public class SchemaToDerivedConfigExporter {
+
+    private void exportConfig(String dirPath, DerivedConfiguration config, ApplicationBuilder builder) throws IOException {
+        config.export(dirPath);
+        DerivedConfiguration.exportDocuments(new DocumentTypes().produce(builder.getModel(), new DocumenttypesConfig.Builder()), dirPath);
+    }
+
+    @Test
+    public void deriveAndExport() throws IOException, ParseException {
+        var dirPath = System.getProperty("schema.exporter.path");
+        // The test is marked as skipped if this is not true.
+        assumeTrue(dirPath != null);
+
+        var props = new TestProperties();
+        var logger = new TestableDeployLogger();
+        var builder = ApplicationBuilder.createFromDirectory(dirPath, new MockFileRegistry(), logger, props);
+        var derived = new DerivedConfiguration(builder.getSchema(null),
+                new DeployState.Builder().properties(props)
+                        .deployLogger(logger)
+                        .rankProfileRegistry(builder.getRankProfileRegistry())
+                        .queryProfiles(builder.getQueryProfileRegistry())
+                        .build());
+        exportConfig(dirPath, derived, builder);
+    }
+}