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//===--------------- DOTJobGraphSerializer.swift - Swift GraphViz ---------===//
//
// 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
//
//===----------------------------------------------------------------------===//
/// Serializes the job graph to a .dot file
@_spi(Testing) public struct DOTJobGraphSerializer {
var kindCounter = [Job.Kind: Int]()
var hasEmittedStyling = Set<String>()
let jobs: [Job]
/// Creates a serializer that will serialize the given set of top level jobs.
public init(jobs: [Job]) {
self.jobs = jobs
}
/// Gets the name of the tool that's being invoked from a job
func findToolName(_ path: VirtualPath) -> String {
switch path {
case .absolute(let abs): return abs.components.last!
case .relative(let rel): return rel.components.last!
default: fatalError("no tool for kind \(path)")
}
}
/// Gets a unique label for a job name
mutating func label(for job: Job) -> String {
var label = "\(job.kind)"
if let count = kindCounter[job.kind] {
label += " \(count)"
}
label += " (\(findToolName(job.tool)))"
kindCounter[job.kind, default: 0] += 1
return label
}
/// Quote the name and escape the quotes
func quoteName(_ name: String) -> String {
return "\"" + name.replacingOccurrences(of: "\"", with: "\\\"") + "\""
}
public mutating func writeDOT<Stream: TextOutputStream>(to stream: inout Stream) {
stream.write("digraph Jobs {\n")
for job in jobs {
let jobName = quoteName(label(for: job))
if !hasEmittedStyling.contains(jobName) {
stream.write(" \(jobName) [style=bold];\n")
}
for input in job.inputs {
let inputName = quoteName(input.file.name)
if hasEmittedStyling.insert(inputName).inserted {
stream.write(" \(inputName) [fontsize=12];\n")
}
stream.write(" \(inputName) -> \(jobName) [color=blue];\n")
}
for output in job.outputs {
let outputName = quoteName(output.file.name)
if hasEmittedStyling.insert(outputName).inserted {
stream.write(" \(outputName) [fontsize=12];\n")
}
stream.write(" \(jobName) -> \(outputName) [color=green];\n")
}
}
stream.write("}\n")
}
}
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