require_explicit_imports: true nukes all import headers

[AdrianBinDC]

New Issue Checklist

• Updated SwiftLint to the latest version
• I searched for existing GitHub issues

Describe the bug

Typed the following in iTerm:

swiftlint analyze --compiler-log-path ./xcodebuild.log --autocorrect --reporter json > swiftlint.json

I expected unnecessary headers to be removed, leaving only headers that are needed to be kept. In the class in question, there are declarations which use Foundation, so I would expect those to stay.

Complete output when running SwiftLint, including the stack trace and command used

Not finished yet. Looking at changes in Tower as it's going.

Environment

• SwiftLint version (run swiftlint version to be sure)? Build from repo on local machine with latest PR
• Installation method used (Homebrew, CocoaPods, building from source, etc)? Built from source.
• Paste your configuration file:

analyzer_rules:
  - unused_import

opt_in_rules:
  - unused_import:
      require_explicit_imports: true

• Which Xcode version are you using (check xcodebuild -version)? Xcode 11.3.1

[jpsim]

I’m sorry you’re seeing this, I haven’t experienced this on the project where I’ve enabled this configuration. Can you please share a sample project that reproduces the issue so I can look into it?

[AdrianBinDC]

@jpsim Unfortunately, I'm not able to do so. I downloaded the repo locally and I will fiddle around with it as time allows. If I'm able to find the issue, I'll put up a PR.

[AdrianBinDC]

What's the best way to debug something like this on actual code? Just do print statements or is there a way to link this up to lldb as you would w/ a iOS project?

[stale]

This issue has been automatically marked as stale because it has not had any recent activity. Please comment to prevent this issue from being closed. Thank you for your contributions!

[jpsim]

Sorry for never answering your last question, but I've documented how I run and debug SwiftLint locally using Xcode here: https://github.com/realm/SwiftLint/blob/master/CONTRIBUTING.md#using-xcode