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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2014 - 2019 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import Foundation
public struct Makefile {
public let outputs: [(target: Substring, deps: [Substring])]
public init?(contents: String) {
var makeOutputs: [(target: Substring, deps: [Substring])] = []
let lines = contents.split(whereSeparator: { $0.isNewline })
for line in lines {
var deps: [Substring] = []
let split = line.split(separator: ":", maxSplits: 1)
guard let output = split.first, let depStr = split.last else {
return nil
}
var prev: Character = "."
var it = depStr.startIndex
var strStart = it
while it != depStr.endIndex {
let curr = depStr[it]
if curr == " " && prev != "\\" {
let dep = depStr[strStart..<it]
if !dep.isEmpty {
deps.append(dep)
}
strStart = depStr.index(after: it)
}
prev = curr
it = depStr.index(after: it)
}
let dep = depStr[strStart..<it]
if !dep.isEmpty {
deps.append(dep)
}
makeOutputs.append((target: output, deps: deps))
}
outputs = makeOutputs
}
public init?(path: URL) {
guard let contents = try? String(contentsOf: path, encoding: .utf8) else {
return nil
}
self.init(contents: contents)
}
}
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