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Adds option for trimmingTrailingWhitespace to ignore whitespace only lines #800

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Adds option for trimmingTrailingWhitespace to ignore whitespace only lines #800

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14 changes: 12 additions & 2 deletions Source/SourceKittenFramework/File.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -102,6 +102,7 @@ public final class File { // swiftlint:disable:this type_body_length
/// - Returns: formatted String
/// - Throws: Request.Error
public func format(trimmingTrailingWhitespace: Bool,
ignoringEmptyLines: Bool = true,
useTabs: Bool,
indentWidth: Int) throws -> String {
guard let path = path else {
Expand Down Expand Up @@ -131,10 +132,12 @@ public final class File { // swiftlint:disable:this type_body_length

if trimmingTrailingWhitespace {
newContents = newContents.map {
$0.bridge().trimmingTrailingCharacters(in: .whitespaces)
if !$0.containsNonWhitespaceCharacters, ignoringEmptyLines {
return $0.bridge()
}
return $0.bridge().trimmingTrailingCharacters(in: .whitespaces)
}
}

return newContents.joined(separator: "\n") + "\n"
}

Expand Down Expand Up @@ -508,3 +511,10 @@ private extension XMLIndexer {
return elements.map(dictionary(from:)) as [SourceKitRepresentable]
}
}

private extension String {
var containsNonWhitespaceCharacters: Bool {
return self.contains(where: {!$0.isWhitespace})
}
}