CLI: Add quiet support to pull and align with Docker

[David Bennett (dkbennett)]

Summary of the Pull Request

Add a --quiet / -q option to wslc pull with output behavior that matches docker pull exactly. In quiet mode, layer/progress output is suppressed and only the final canonical image reference is printed. As part of matching Docker's client-side behavior, wslc pull now also prints Using default tag: latest for name-only references and always prints the fully-qualified canonical reference as the final line.

This is an entirely client-side change (no IDL/service changes); the behavior was verified line-by-line against Docker's cli/command/image/pull.go.

PR Checklist

• Closes: Link to issue #xxx
• Communication: I've discussed this with core contributors already. If work hasn't been agreed, this work might be rejected
• Tests: Added/updated if needed and all pass
• Localization: All end user facing strings can be localized
• Dev docs: Added/updated if needed
• Documentation updated: If checked, please file a pull request on our docs repo and link it here: #xxx

Detailed Description of the Pull Request / Additional comments

wslc pull now mirrors the Docker CLI's runPull flow:

• --quiet / -q — suppresses progress output by passing a null progress callback to ImageService::Pull (the COM IProgressCallback* is already [in, unique]/nullable). Warnings are unaffected because the warning callback is built internally from the Reporter. Help text is "Suppress verbose output", matching Docker.
• Using default tag: latest — for a name-only reference (no tag or digest), the tag defaults to latest and, unless quiet, the client reports this on stdout before contacting the registry (exactly as Docker does).
• Canonical reference always printed — the resolved fully-qualified reference is always printed as the final line, in both quiet and non-quiet modes (e.g. docker.io/library/ubuntu:latest). Previously wslc pull did not print this line; this closes a Docker-parity gap.

A new helper, wsl::windows::common::wslutil::GetCanonicalImageReference, mirrors the client-side normalization in github.com/distribution/reference (ParseNormalizedNamed adds the docker.io default domain and library/ prefix; TagNameOnly defaults a name-only reference to :latest) and produces the reference string printed by docker pull, preserving a tag and digest together when both are present.

Example behavior (matches Docker):

• wslc pull ubuntu:latest -q prints docker.io/library/ubuntu:latest (single line, no progress)
• wslc pull alpine:latest prints progress on stdout, then docker.io/library/alpine:latest
• wslc pull ubuntu prints Using default tag: latest first, then progress + canonical reference
• wslc pull ubuntu:22.04@sha256:... prints docker.io/library/ubuntu:22.04@sha256:... (both tag and digest preserved)

Validation Steps Performed

• New tests ran and pass
• Existing pull tests pass
• Manual verification from deployed local build

[Copilot]

Pull request overview

This PR updates the Windows wslc CLI’s pull behavior to match docker pull, adding a quiet mode and standardizing the final output to always be the canonical image reference on success.

Changes:

• Added --quiet / -q to wslc pull to suppress progress output (Docker parity).
• Added client-side “Using default tag: latest” output for name-only references (suppressed in quiet mode).
• Implemented GetCanonicalImageReference() and added unit + e2e coverage for canonicalization and quiet/name-only behavior.

Reviewed changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
test/windows/WSLCTests.cpp	Adds unit tests for canonical image reference normalization.
test/windows/wslc/e2e/WSLCE2EPushPullTests.cpp	Adds e2e coverage for pull --quiet and name-only default-tag messaging.
test/windows/wslc/CommandLineTestCases.h	Extends parser command-line test cases to include pull --quiet / pull -q.
src/windows/wslc/tasks/ImageTasks.cpp	Implements quiet progress suppression, default-tag message, and canonical final-line printing in PullImage.
src/windows/wslc/commands/ImagePullCommand.cpp	Wires the Quiet argument into the pull command with pull-specific help text.
src/windows/common/wslutil.h	Declares GetCanonicalImageReference() helper.
src/windows/common/wslutil.cpp	Implements canonical reference formatting logic (Docker-like normalization).
localization/strings/en-US/Resources.resw	Adds localized strings for pull quiet help text and default-tag message.

[Copilot]

Pull request overview

Copilot reviewed 8 out of 8 changed files in this pull request and generated no new comments.

[Blue (OneBlue)]

Change looks good, minor comments

[Blue (OneBlue)]

Feel free to merge now and resolve the comments in a followup