git-status.swift

struct StatusSummary {
    let items: [Item]
    
    enum Staging {
        case staged
        case unstaged
        case unknown
    }
    
    enum Status {
        case modified
        case untracked
        case deleted
        case renamed
        case unknown
    }
    
    struct Item {
        let staging: Staging
        let status: Status
        let filename: String
    }
}

func parse(item: String) -> StatusSummary.Item {
    let chars = item.characters
    let status = String(chars.prefix(3))
    let file = String(chars.suffix(chars.count - 3))
    
    switch(status) {
        case " M ":
            return StatusSummary.Item(
                staging: .unstaged, 
                status: .modified, 
                filename: file
            )
        case "M  ":
            return StatusSummary.Item(
                staging: .staged, 
                status: .modified, 
                filename: file
            )
        default:
            return StatusSummary.Item(
                staging: .unknown, 
                status: .unknown, 
                filename: file
            )
    }
}

print(parse(item: " M derp/what-even.rb"))