spring-boot generator can not handle multi-profile configuration

Description

I have a Spring Boot application.yml file with following format :

spring:
  profiles:
    active: default
---

spring:
  profiles: default
hono:
  downstream:
    host: localhost
    port: 5672
    name: hono-server
  maxInstances: 0
  singleTenant: false
  server:
    bindaddress: 127.0.0.1
    port: 5672

Using the plugin I have the following error :

[ERROR] Failed to execute goal io.fabric8:fabric8-maven-plugin:3.2.14:resource (default) on project hono-app: Execution default of goal io.fabric8:fabric8-maven-plugin:3.2.14:resource failed: Cannot extract generator: expected a single document in the stream
[ERROR] in 'reader', line 1, column 1:
[ERROR] spring:
[ERROR] ^
[ERROR] but found another document
[ERROR] in 'reader', line 4, column 1:
[ERROR] ---
[ERROR] ^
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal io.fabric8:fabric8-maven-plugin:3.2.14:resource (default) on project hono-app: Execution default of goal io.fabric8:fabric8-maven-plugin:3.2.14:resource failed: Cannot extract generator: expected a single document in the stream
 in 'reader', line 1, column 1:
    spring:
    ^
but found another document
 in 'reader', line 4, column 1:
    ---
    ^

	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:212)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
	at org.apache.maven.lifecycle.internal.MojoExecutor.executeForkedExecutions(MojoExecutor.java:352)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:197)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
	at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
	at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
	at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
	at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
	at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
	at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
	at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
	at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
	at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
	at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
	at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
Caused by: org.apache.maven.plugin.PluginExecutionException: Execution default of goal io.fabric8:fabric8-maven-plugin:3.2.14:resource failed: Cannot extract generator: expected a single document in the stream
 in 'reader', line 1, column 1:
    spring:
    ^
but found another document
 in 'reader', line 4, column 1:
    ---
    ^

	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:145)
	at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
	... 24 more
Caused by: java.lang.IllegalArgumentException: Cannot extract generator: expected a single document in the stream
 in 'reader', line 1, column 1:
    spring:
    ^
but found another document
 in 'reader', line 4, column 1:
    ---
    ^

	at io.fabric8.maven.plugin.mojo.build.ResourceMojo$3.customizeConfig(ResourceMojo.java:620)
	at io.fabric8.maven.docker.config.ConfigHelper.resolveImages(ConfigHelper.java:51)
	at io.fabric8.maven.plugin.mojo.build.ResourceMojo.getResolvedImages(ResourceMojo.java:593)
	at io.fabric8.maven.plugin.mojo.build.ResourceMojo.executeInternal(ResourceMojo.java:225)
	at io.fabric8.maven.plugin.mojo.AbstractFabric8Mojo.execute(AbstractFabric8Mojo.java:74)
	at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
	... 25 more
Caused by: expected a single document in the stream
 in 'reader', line 1, column 1:
    spring:
    ^
but found another document
 in 'reader', line 4, column 1:
    ---
    ^

	at org.yaml.snakeyaml.composer.Composer.getSingleNode(Composer.java:110)
	at org.yaml.snakeyaml.constructor.BaseConstructor.getSingleData(BaseConstructor.java:120)
	at org.yaml.snakeyaml.Yaml.loadFromReader(Yaml.java:450)
	at org.yaml.snakeyaml.Yaml.loadAs(Yaml.java:444)
	at io.fabric8.maven.core.util.SpringBootUtil.getPropertiesFromYamlResource(SpringBootUtil.java:97)
	at io.fabric8.maven.core.util.SpringBootUtil.getSpringBootApplicationProperties(SpringBootUtil.java:51)
	at io.fabric8.maven.generator.springboot.SpringBootGenerator.extractPorts(SpringBootGenerator.java:99)
	at io.fabric8.maven.generator.javaexec.JavaExecGenerator.customize(JavaExecGenerator.java:116)
	at io.fabric8.maven.generator.springboot.SpringBootGenerator.customize(SpringBootGenerator.java:76)
	at io.fabric8.maven.plugin.generator.GeneratorManager.generate(GeneratorManager.java:62)
	at io.fabric8.maven.plugin.mojo.build.ResourceMojo$3.customizeConfig(ResourceMojo.java:618)
	... 30 more
[ERROR] 
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR] 
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException

It seems that it’s not able to handle the “—” separator.

Info

• f-m-p version : 3.2.14
• Maven version (mvn -v) : 3.3.9

[anwarchk]

@rohanKanojia @rhuss

[tuyenttran]

Can we detect active profiles from system environment or parameter (spring.profiles.active) when parsing YAML file?