Import of provisioners from private OCI registry/image

[7h3-3mp7y-m4n]

Description

Added the docker login support

as mentioned here: https://github.com/oras-project/oras-go/blob/main/example_test.go#L106

What does this PR do?

This PR supports dynamic login which uses $DOCKER_CONFIG/config.json for login..

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• New chore (expected functionality to be implemented)

Checklist:

• My change requires a change to the documentation.
  • I have updated the documentation accordingly.
• I've signed off with an email address that matches the commit author.

[7h3-3mp7y-m4n]

the following code was added from https://github.com/oras-project/oras-go/blob/main/example_test.go#L122
while the old test cases tested it, it spits no error, so adding some logged output showed some clarity ...
=== RUN ExampleGetFile_oci_https 2024/11/20 00:24:49 Starting getOci for URL: oci://ghcr.io/score-spec/score-compose-community-provisioners:v0.1.0#00-service.provisioners.yaml 2024/11/20 00:24:49 Parsed reference: ghcr.io/score-spec/score-compose-community-provisioners:v0.1.0, with tag: v0.1.0 2024/11/20 00:24:49 Specified file from fragment: 00-service.provisioners.yaml 2024/11/20 00:24:49 Docker credentials successfully loaded 2024/11/20 00:24:49 Connected to remote repository: ghcr.io/score-spec/score-compose-community-provisioners:v0.1.0 2024/11/20 00:24:49 Fetching manifest for reference: v0.1.0 2024/11/20 00:24:50 Manifest fetched and decoded successfully 2024/11/20 00:24:50 Searching for YAML files in manifest layers 2024/11/20 00:24:50 Checking layer: 00-redis-dapr-state-store.provisioners.yaml 2024/11/20 00:24:50 Found YAML file: 00-redis-dapr-state-store.provisioners.yaml (count: 1) 2024/11/20 00:24:50 Checking layer: 00-service.provisioners.yaml 2024/11/20 00:24:50 Found YAML file: 00-service.provisioners.yaml (count: 2) 2024/11/20 00:24:50 Selected layer for file: 00-service.provisioners.yaml 2024/11/20 00:24:50 Fetching blob for layer: sha256:be27ce16ed6916c35fe0a08f56c4a86e884d6b40a8273c6031d6d772a8fccfb0 2024/11/20 00:24:50 Reading blob content with limit: 1073741824 bytes 2024/11/20 00:24:50 Successfully read 231 bytes from file: 00-service.provisioners.yaml 2024/11/20 00:24:51 Read 231 bytes from GET https://github.com/score-spec/community-provisioners/raw/v0.1.0/score-compose/00-service.provisioners.yaml --- PASS: ExampleGetFile_oci_https (2.11s)
I haven't tested it yet with a private repository, I'll update it according and add a test case for it as well

[mathieu-benoit]

@7h3-3mp7y-m4n , like discussed, please provide the instructions to reproduce/test this new feature.
Maybe with a local registry. Maybe with this local registry setup: https://oras.land/docs/compatible_oci_registries#cncf-distribution?

[7h3-3mp7y-m4n]

for sure I'll post the steps and also the output ASAP!