SwiftLint/Source/SwiftLintFramework/Rules/FileLengthRule.swift

//
//  FileLengthRule.swift
//  SwiftLint
//
//  Created by JP Simard on 5/16/15.
//  Copyright © 2015 Realm. All rights reserved.
//

import SourceKittenFramework

public struct FileLengthRule: ConfigurationProviderRule, SourceKitFreeRule {
    public var configuration = SeverityLevelsConfiguration(warning: 400, error: 1000)

    public init() {}

    public static let description = RuleDescription(
        identifier: "file_length",
        name: "File Line Length",
        description: "Files should not span too many lines.",
        nonTriggeringExamples: [
            repeatElement("//\n", count: 400).joined()
        ],
        triggeringExamples: [
            repeatElement("//\n", count: 401).joined()
        ]
    )

    public func validate(file: File) -> [StyleViolation] {
        let lineCount = file.lines.count
        for parameter in configuration.params where lineCount > parameter.value {
            let reason = "File should contain \(configuration.warning) lines or less: " +
                         "currently contains \(lineCount)"
            return [StyleViolation(ruleDescription: type(of: self).description,
                                   severity: parameter.severity,
                                   location: Location(file: file.path, line: lineCount),
                                   reason: reason)]
        }
        return []
    }
}