parsing devfile downloads resource files

[mike-hoang]

Signed-off-by: Michael Hoang mhoang@redhat.com

What does this PR do?:

Downloads all resources files from a stack to the local root folder if it doesn’t already exist (will not overwrite files).

The resource files will only be downloaded in the following cases:

# with a valid registry url and id
parent:
  id: nodejs
  registryUrl: https://registry.devfile.io

# with a raw GitHub file link that points to a devfile
parent:
  uri: https://raw.githubusercontent.com/devfile/registry/main/stacks/nodejs/devfile.yaml

# with a relative path
parent:
  uri: ./parent/devfile.yaml

Which issue(s) this PR fixes:

fixes devfile/api#46

PR acceptance criteria:

Testing and documentation do not need to be complete in order for this PR to be approved. We just need to ensure tracking issues are opened.

• Open new test/doc issues under the devfile/api repo
• Check each criteria if:
• There is a separate tracking issue. Add the issue link under the criteria
  or
• test/doc updates are made as part of this PR
• If unchecked, explain why it's not needed

• Unit/Functional tests

• QE Integration test

• Documentation

• Client Impact

How to test changes / Special notes to the reviewer:

[yangcao77]

This PR only handles stacks from registry. what about parent reference from a URL? or from a local path (absolute/relative URI)?

[yangcao77]

add more comments, so other prople will have better understanding of the code for future maintenance.

[codecov-commenter]

Codecov Report

Base: 57.67% // Head: 57.72% // Increases project coverage by +0.05% 🎉

Coverage data is based on head (6391190) compared to base (053629a).
Patch coverage: 52.09% of modified lines in pull request are covered.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #139      +/-   ##
==========================================
+ Coverage   57.67%   57.72%   +0.05%     
==========================================
  Files          35       35              
  Lines        3794     3960     +166     
==========================================
+ Hits         2188     2286      +98     
- Misses       1485     1537      +52     
- Partials      121      137      +16     

Impacted Files	Coverage Δ
pkg/devfile/parser/parse.go	51.00% <28.57%> (-2.64%)	⬇️
pkg/util/util.go	39.25% <66.34%> (+4.69%)	⬆️

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[yangcao77]

look good to me. thanks for the change

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mike-hoang, yangcao77

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• OWNERS [yangcao77]

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