[INVESTIGATED/TESTED] Configuration File Pathing Issue + Subsequent Issue

[kgrv-me]

Please refer to PR #59 for detailed solutions.

ISSUES

• hadolint-action cannot receive configuration file properly
• Conflict infomation betweenREADME.md and action.yml
  • inputs.config.default is empty in action.yml, while README.md states otherwise
  • Default path stated in README.md would still encounter the above issue
• (Edited) the official hadolint/hadolint:latest container also suffers from configuration file issue

TEST CASES

• All done within GitHub Actions workflow
• All results in failure to receive configuration file

- uses: hadolint/hadolint-action@v2.1.0
  with:
    config: PATH

Substitute PATH with the followings:

hadolint.yaml
./hadolint.yaml
.hadolint.yaml
/home/runner/work/sandbox/sandbox/hadolint.yaml

INVESTIGATION

0. hadolint looks for configuration files via

$PWD/.hadolint.yaml
$XDG_CONFIG_HOME/hadolint.yaml
$HOME/.config/hadolint.yaml
$HOME/.hadolint/hadolint.yaml or $HOME/hadolint/config.yaml
$HOME/.hadolint.yaml

NOTE hadolint-action utilizes Docker container for execution

1. hadolint uses PWD and HOME environment variables
2. action.yml maps inputs.config to HADOLINT_CONFIG
3. Dockerfile points to hadolint.sh for entrypoint
4. hadolint.sh appends -c ${HADOLINT_CONFIG} to hadolint command
5. hadolint-action uses Docker with

docker run .. --workdir /github/workspace .. -v "/home/runner/work/sandbox/sandbox":"/github/workspace" ..

6. PWD=/ and HOME=/root inside the container

CONCLUSION

1. Since pwd inside the container isn't matching with PWD nor HOME, hadolint cannot find configuration file in usual places
2. Knowing pwd and -v for the container, we can edit PATH to be /github/workspace/hadolint.yaml for hadolint-action to use

SUGGESTION

• Document the usage in README.md accordingly (CONCLUSION.2)
  or
• Change PWD/HOME in Dockerfile to accommodate the differences
  or
• Prepend /github/workspace/ to the path of configuration file
  or preferably all of the above! :D
• Please consider adding MAJOR_VERSION tag for the release (#47)

Thank you!

[José Lorenzo Rodríguez]

Would you like to submit a change with those fixes?

[kgrv-me]

@lorenzo I could definitely do that! How would I proceed to do so?
EDIT: I have opened PR #59 for the solutions :D