Allow spring.profiles.include to be used anywhere to add active profiles

Previously, spring.profiles.include was only considered when it was
used in a configuration file. It was ignored in any other property
source.

This commit updates ConfigFileApplicationListener so that
spring.profiles.include can be used in any property source to add to
the profiles that have been declared active via
spring.profiles.active.

Closes gh-7668

spring-boot/src/main/java/org/springframework/boot/context/config/ConfigFileApplicationListener.java

@@ -393,8 +393,11 @@ private Set<Profile> initializeActiveProfiles() {
 			}
 			// Any pre-existing active profiles set via property sources (e.g. System
 			// properties) take precedence over those added in config files.
-			Set<Profile> activeProfiles = bindSpringProfiles(
-					this.environment.getPropertySources()).getActiveProfiles();
+			SpringProfiles springProfiles = bindSpringProfiles(
+					this.environment.getPropertySources());
+			Set<Profile> activeProfiles = new LinkedHashSet<Profile>(
+					springProfiles.getActiveProfiles());
+			activeProfiles.addAll(springProfiles.getIncludeProfiles());
 			maybeActivateProfiles(activeProfiles);
 			return activeProfiles;
 		}

spring-boot/src/test/java/org/springframework/boot/context/config/ConfigFileApplicationListenerTests.java

@@ -837,6 +837,18 @@ public void customDefaultProfileAndActiveFromFile() throws Exception {
 		assertThat(environment.acceptsProfiles("customdefault")).isTrue();
 	}
 
+	@Test
+	public void additionalProfilesCanBeIncludedFromAnyPropertySource() throws Exception {
+		SpringApplication application = new SpringApplication(Config.class);
+		application.setWebEnvironment(false);
+		this.context = application.run("--spring.profiles.active=myprofile",
+				"--spring.profiles.include=dev");
+		String property = this.context.getEnvironment().getProperty("my.property");
+		assertThat(property).isEqualTo("fromdevpropertiesfile");
+		assertThat(this.context.getEnvironment().containsProperty("customdefault"))
+				.isFalse();
+	}
+
 	private Condition<ConfigurableEnvironment> matchingPropertySource(
 			final String sourceName) {
 		return new Condition<ConfigurableEnvironment>(