Evaluate load.properties

avaje-config/src/main/java/io/avaje/config/InitialLoadContext.java

@@ -1,14 +1,20 @@
 package io.avaje.config;
 
-import io.avaje.config.CoreEntry.CoreMap;
-import org.jspecify.annotations.Nullable;
-
-import java.io.*;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.InputStream;
+import java.io.UncheckedIOException;
 import java.lang.System.Logger.Level;
 import java.util.ArrayList;
 import java.util.LinkedHashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.StringJoiner;
+
+import org.jspecify.annotations.Nullable;
+
+import io.avaje.config.CoreEntry.CoreMap;
 
 /**
  * Manages the underlying map of properties we are gathering.
@@ -127,9 +133,7 @@ CoreMap entryMap() {
     return map;
   }
 
-  /**
-   * Read the special properties that can point to an external properties source.
-   */
+  /** Read the special properties that can point to an external properties source. */
   String indirectLocation() {
     String location = System.getProperty("load.properties");
     if (location != null) {
@@ -139,7 +143,12 @@ String indirectLocation() {
     if (indirectLocation == null) {
       indirectLocation = map.get("load.properties.override");
     }
-    return indirectLocation == null ? null : indirectLocation.value();
+    var result = indirectLocation == null ? null : indirectLocation.value();
+    if (result != null && indirectLocation.needsEvaluation()) {
+      result = eval(result);
+      map.put("load.properties", result, "");
+    }
+    return result;
   }
 
   String profiles() {

avaje-config/src/main/java/io/avaje/config/InitialLoader.java

@@ -190,7 +190,7 @@ private boolean loadTest() {
   /**
    * Load configuration defined by a <em>load.properties</em> entry in properties file.
    */
-  private void loadViaIndirection() {
+  void loadViaIndirection() {
     String paths = loadContext.indirectLocation();
     if (paths != null) {
       loadViaPaths(paths);

avaje-config/src/test/java/io/avaje/config/InitialLoaderTest.java

@@ -120,6 +120,18 @@ void loadViaCommandLine_localFile() {
     assertEquals(1, loader.size());
   }
 
+  @Test
+  void loadViaIndirection_Profiles() {
+    InitialLoader loader = newInitialLoader();
+    loader.entryMap().put("getsuga", "tensho.properties", "test");
+    loader
+        .entryMap()
+        .put("load.properties", "${getsuga}", "test");
+    loader.loadViaIndirection();
+
+    assertEquals(loader.entryMap().get("load.properties").value(), "tensho.properties");
+  }
+
   @Test
   void load_withSuppressTestResource() {
     //application-test.yaml is loaded when suppressTestResource is not set to true