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Change XCODE_RUNNING_FOR_PREVIEWS to SNAPSHOTS_RUNNING_FOR_PREVIEWS #262

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Merged
cameroncooke merged 1 commit into from
May 14, 2026
Merged

Change XCODE_RUNNING_FOR_PREVIEWS to SNAPSHOTS_RUNNING_FOR_PREVIEWS #262

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4 changes: 2 additions & 2 deletions README.md
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Expand Up @@ -175,12 +175,12 @@ Snapshot previews should be deterministic. Avoid live network calls, timers, ani

## Detecting the snapshot environment

Set `XCODE_RUNNING_FOR_PREVIEWS=1` in your unit test scheme to mirror the variable Xcode sets when rendering live previews. You can then disable preview-unfriendly behavior (logging, analytics, network calls) with a single check:
Set `SNAPSHOTS_RUNNING_FOR_PREVIEWS=1` in your unit test scheme to mirror the variable Xcode sets when rendering live previews. You can then disable preview-unfriendly behavior (logging, analytics, network calls) with a single check:

```swift
extension ProcessInfo {
var isRunningPreviews: Bool {
environment["XCODE_RUNNING_FOR_PREVIEWS"] == "1"
environment["SNAPSHOTS_RUNNING_FOR_PREVIEWS"] == "1"
}
}
```
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