Add Color Progress Output Mode

[nrthakur]

Type of Change

• Bug fix
• New feature
• Breaking change
• Documentation update

Motivation and Context

Color Progress Output Mode

Adds a color progress output mode (--progress color) that renders ANSI-colored progress output with visual differentiation between progress states.

Unlike the existing ansi mode (which only uses cursor control), color introduces color-coded output:

• Cyan → spinner / active tasks
• Bold text → task description
• Yellow / Green → percentage (in-progress / complete)
• Green → progress bar
• Dim text → secondary information

Like ansi mode, this feature requires a TTY.

Closes #1366

Testing

• Tested locally
• Added/updated tests
• Added/updated docs

Visuals

Light	Dark	Plain	Ansi
light.mov	dark.mov	plain.mov	ansi.mov

[nrthakur]

@jglogan PR 2/2 for the Color/Plain Progress Output Mode set (following #1365). I think this is in a good place now would appreciate some eyes when there is a free moment.

-cc @dkovba (since you approved the Plain PR #1367 & have some context)

Thank you both for all the help and support!

p.s - as a Canadian, the way you guys spell colour trips me out 😛

[jglogan]

the way you guys spell colour trips me out

What is this "colour" you speak of

[jglogan]

make fmt needed (consider installing the pre-commit hook)

[dkovba]

Thank you for the contribution! @jglogan Please check whether the use of colors matches your expectations. Do we expect to use the color mode by default?

[jglogan]

@nrthakur Could you have a look at Dmitry's feedback when you get a chance? And regarding the color, would it be possible to post a couple of representative screenshots, one with a dark-on-light terminal, and one light-on-dark?

@dkovba

Do we expect to use the color mode by default?

I'd expect the default to be plain output still, and that we'd want a follow-on issue for a feature to allow the user to override the default mode, and eventually override the color palette. As we're transitioning away from macOS user defaults to config files and environment variables for this, I'd expect we'd want an environment variable like CONTAINER_CLI_PROGRESS or something of that nature.

[nrthakur]

@jglogan @dkovba

Apologies, it's final exam season right now didn't mean to drop this. Will have a commit addressing reviews sometime before EOD today / early tomorrow.

Thank you both!

[nrthakur]

@jglogan @dkovba Reviews addressed, please see PR description for visuals.

Created #1406 as a follow-on for CONTAINER_CLI_PROGRESS environment variable support. Would love to pick it up once this PR is merged.

[jglogan]

Apologies, it's final exam season right now

No need for apologies, we appreciate what you're doing and the time you're giving to the project.

Go crush your exams!