[omochi@omochi-iMac tt]$ cat a.swift let a: Int = 3 let b: Int = 2 print(b) [omochi@omochi-iMac tt]$ swiftlint Linting Swift files in current working directory Linting 'a.swift' (1/1) /Users/omochi/temp/tt/a.swift:1:1: error: Identifier Name Violation: Variable name should be between 3 and 40 characters long: 'a' (identifier_name) /Users/omochi/temp/tt/a.swift:3:1: error: Identifier Name Violation: Variable name should be between 3 and 40 characters long: 'b' (identifier_name) Done linting! Found 2 violations, 2 serious in 1 file.