[rush] Hide no-op _phase action in the timeline table

[chengbapi]

Summary

This is a screenshot of rush build --timeline from one of our real projects.

In our repo, we’ve defined some custom phases, and only a few projects have _phase:prebuild and _phase:build-native. However, in the timeline output, Rush shows all phases for all projects, even when a phase is a no-op for that project. This makes the timeline hard to read.

It would be better if no-op phases were hidden (or could be optionally hidden), so that the timeline only shows phases that actually did work.

Expected result:

remove no-op actions in the timeline

Actual result:

Details

Standard questions

Please answer these questions to help us investigate your issue more quickly:

Question	Answer
@microsoft/rush globally installed version?	5.155.1
rushVersion from rush.json?	5.155.1
useWorkspaces from rush.json?	null
Operating system?	Mac
Would you consider contributing a PR?	Yes
Node.js version (node -v)?	22.17.1

[iclanton]

@chengbapi - Take a look at the "missingScriptBehavior": "silent" option for your phases in common/config/rush/command-line.json.