swiftlang/swift-package-manager

Add support for listing all test tags

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#8889 opened on Jul 2, 2025

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enhancementgood first issueswift test

Description

Description

Once https://github.com/swiftlang/swift-testing/issues/591 is resolved, it would be ideal to have an option where swift test can provide the list of all tags available in a given package.

This relates to https://github.com/swiftlang/swift-testing/issues/591

Expected behavior

swift test is augmented to provide a unique list of available tags, which, optionally, can be used to enable/skip execution.

Actual behavior

There is no feature to list tags.

Steps to reproduce

No response

Swift Package Manager version/commit hash

No response

Swift & OS version (output of swift --version && uname -a)

No response

Contributor guide

Tech stack
None
Domain
testingcli
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
blocked
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
clear
Prerequisites
Familiarity with SwiftBasic knowledge of Swift Package Manager commands
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
First, review the resolution of swiftlang/swift testing#591 to understand how tags are exposed. Then, examine the SwiftPM command implementation, particularly the `SwiftTestTool.swift` file, to see how existing flags are added. Consider looking at similar listing features like ` list tests` if available. Finally, propose a new ` list tags` option that leverages the tag API from swift testing.