Unable to build a native image with a custom application directory

[stefferro]

Hi,

I am experiencing an issue while building a native image when specifying a custom app directory.

The building process fails at the very end with the following error message.

[INFO]     [creator]     Finished generating 'com.example.demo.DemoApplication' in 1m 48s.
[INFO]     [creator]       Removing bytecode
[INFO]     [creator]     unable to invoke layer creator
[INFO]     [creator]     unable to remove /myapp/BOOT-INF
[INFO]     [creator]     unlinkat /myapp/BOOT-INF: permission denied
[INFO]     [creator]     ERROR: failed to build: exit status 1

The documentation does not mention that changing the default application directory is not supported for native image so I presume this is an issue.

How to reproduce

• Generate a default demo project using Spring Initializr; You can use this link
• Modify the spring-boot-maven-plugin as below. I specify an application directory other than /workspace and enable the native build.

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
        <configuration>
	    <image>
	        <applicationDirectory>/myapp</applicationDirectory>
		<env>
		    <BP_NATIVE_IMAGE>true</BP_NATIVE_IMAGE>
		</env>
	    </image>
	</configuration>
</plugin>

• Run the maven command to generate the image

./mvnw spring-boot:build-image -Pnative

[wilkinsona]

Thanks for the report but, AFAIK, this is out of Spring Boot's control. Please raise it with the Buildpacks Community.