feat(image): add progress bar for image layer pulling

[nikpivkin]

Description

TODO:

• add tests
• progress bar only works with max-image-size
• use the progress bar pool to fix flickering when pulling layers in parallel

Example:

❯ ./trivy image redis:5.0 --max-image-size 200mb
2024-12-26T23:47:36+06:00       INFO    [vuln] Vulnerability scanning is enabled
2024-12-26T23:47:36+06:00       INFO    [secret] Secret scanning is enabled
2024-12-26T23:47:36+06:00       INFO    [secret] If your scanning is slow, please try '--scanners vuln' to disable secret scanning
2024-12-26T23:47:36+06:00       INFO    [secret] Please see also https://aquasecurity.github.io/trivy/dev/docs/scanner/secret#recommendation for faster secret detection
95dff52c35dd 1.35 MiB / 1.35 MiB [-------------------------------------------------------------------------------] 100.00%
c37fdfa5080c 572 B / 572 B [-------------------------------------------------------------------------------------] 100.00%
3716059b2ea5 134 B / 134 B [-------------------------------------------------------------------------------------] 100.00%
84566964bca1 1.69 KiB / 1.69 KiB [-------------------------------------------------------------------------------] 100.00%
598399fdc4dd 6.94 MiB / 6.94 MiB [-------------------------------------------------------------------------------] 100.00%
ec4a38999118 29.96 MiB / 29.96 MiB [-----------------------------------------------------------------------------] 100.00%

Related issues

• Close Show progress when fetching layers #330

Related PRs

• feat(image): prevent scanning oversized container images #8178

Remove this section if you don't have related PRs.

Checklist

• I've read the guidelines for contributing to this repository.
• I've followed the conventions in the PR title.
• I've added tests that prove my fix is effective or that my feature works.
• I've updated the documentation with the relevant information (if needed).
• I've added usage information (if the PR introduces new options)
• I've included a "before" and "after" example to the description (if the PR is a user interface change).

[knqyf263]

This approach may help.

// progressLayer wraps a v1.Layer to add progress bar functionality
type progressLayer struct {
	v1.Layer
}

func (l *progressLayer) Compressed() (io.ReadCloser, error) {
	rc, err := l.Layer.Compressed()
	if err != nil {
		return nil, err
	}

	size, err := l.Layer.Size()
	if err != nil {
		return nil, err
	}

	bar := pb.Full.Start64(size)
	bar.Set(pb.Bytes, true)

	return bar.NewProxyReader(rc), nil
}

func NewProgressLayer(layer v1.Layer) (v1.Layer, error) {
	return partial.CompressedToLayer(&progressLayer{ Layer: layer})
}