Integration TestRelativePaths fails to build

[cvgw]

Actual behavior
The image for TestRelativePaths fails to build, we didn't notice this because the error return by the builder method was not checked

kaniko/integration/integration_test.go

Line 390 in 8d2b205

imageBuilder.buildRelativePathsImage(config.imageRepo, dockerfile, config.serviceAccount)

Expected behavior
The test builds and passes successfully

Triage Notes for the Maintainers

Description	Yes/No
Please check if this a new feature you are proposing
Please check if the build works in docker but not in kaniko
Please check if this error is seen when you use --cache flag
Please check if your dockerfile is a multistage dockerfile

[cvgw]

It looks like that test was added in #736 but I'm not sure how it could have ever passed. What creates ./relative-subdirectory?

[cvgw]

cc @tejal29

[cvgw]

It's not clear to me what scenario this is supposed to be testing.

Is ./relative-suubdirectory supposed to be in the context? In the workspace?

@huguesalary perhaps you can provide some insight into what the intention behind this test was?

[cvgw]

Perhaps this is an example of the scenario which should be tested?

foo
  src
    package.json
  docker
    Dockerfile

FROM bar:latest
COPY package.json /app/package.json

docker run \
  -v /foo:/workspace \
  gcr.io/kaniko-project/executor \
  --context ./src \
  --Dockerfile ./docker/Dockerfile
...

edit

It does appear this is a valid scenario for the test. Kaniko fails to build this example without the code added in #736

I've created two branches to demonstrate this

cvgw/kaniko@1092-debugging-pre
cvgw/kaniko@1092-debugging-post