how to properly reference `dir` in the step attribute of a popper workflow?

Question

I'm having trouble when I try to use the dir attribute of a step in my workflow. I have a directory like the following:

myproject/
  folder/
    subfolder/

And this is how my workflow looks like:

steps:
- uses: docker://alpine:3.12
  dir: folder/subfolder
  args: [pwd]

The above is stored in a wf.yml file, and I run it by doing:

cd myproject/

popper run -f wf.yml

But I'm getting the error:

ERROR: Schema validation failed:
 - Key 'dir' was not defined. Path: '/steps/1'.

I am using Popper 2.6.0, and Docker 19.03.8

Answer 1

The dir feature in Popper is available in version 2.7.0+, so you will need to update to a newer version. In addition, as specified in the documentation, the path given to the dir attribute of a step has to be an absolute path. In the given example, since the folder being referenced is within the myproject/ folder, which is the one getting bind-mounted to /workspace inside the container, the workflow would look like:

steps:
- uses: docker://alpine:3.12
  dir: /workspace/folder/subfolder
  args: [pwd]

and the above should print /workspace/folder/subfolder.