flutter run output spew on macOS compile #43477
Description
When running flutter run -d macOS on macOS, it spews environment variables and build steps even if --verbose is not specified.
Steps to Reproduce
$ flutter run -d macos &> spew.macos.txt
See attached file spew.macos.txt.
Logs
$ flutter doctor -v
[✓] Flutter (Channel master, v1.10.15-pre.250, on Mac OS X 10.15 19A602, locale en-US)
• Flutter version 1.10.15-pre.250 at /Users/timsneath/flutter
• Framework revision 1df27f04c0 (9 hours ago), 2019-10-24 16:14:06 -0400
• Engine revision 8d6b74aee6
• Dart version 2.6.0 (build 2.6.0-dev.8.2 1bd6e20d76)
[✓] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
• Android SDK at /Users/timsneath/Library/Android/sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-29, build-tools 29.0.2
• Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
• All Android licenses accepted.
[✓] Xcode - develop for iOS and macOS (Xcode 11.0)
• Xcode at /Applications/Xcode.app/Contents/Developer
• Xcode 11.0, Build version 11A420a
• CocoaPods version 1.7.5
[✓] Chrome - develop for the web
• Chrome at /Applications/Google Chrome.app/Contents/MacOS/Google Chrome
[✓] Android Studio (version 3.5)
• Android Studio at /Applications/Android Studio.app/Contents
• Flutter plugin version 39.0.3
• Dart plugin version 191.8423
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b49-5587405)
[✓] VS Code (version 1.39.2)
• VS Code at /Applications/Visual Studio Code.app/Contents
• Flutter extension version 3.5.1
[✓] Connected device (3 available)
• macOS • macOS • darwin-x64 • Mac OS X 10.15 19A602
• Chrome • chrome • web-javascript • Google Chrome 77.0.3865.120
• Web Server • web-server • web-javascript • Flutter Tools