[SE-0085] Add a package subcommand to handle package-oriented operations

Package.swift

@@ -89,6 +89,10 @@ let package = Package(
             dependencies: ["Basic", "Build", "Get", "PackageGraph", "Xcodeproj"]),
         Target(
             /** The main executable provided by SwiftPM */
+            name: "swift-package",
+            dependencies: ["Commands"]),
+        Target(
+            /** Builds packages */
             name: "swift-build",
             dependencies: ["Commands"]),
         Target(

Sources/Commands/SwiftBuildTool.swift

@@ -401,58 +401,6 @@ enum CleanMode: CustomStringConvertible {
     }
 }
 
-enum InitMode: CustomStringConvertible {
-    case Library, Executable
-
-    private init(_ rawValue: String?) throws {
-        switch rawValue?.lowercased() {
-        case "library"?, "lib"?:
-            self = .Library
-        case nil, "executable"?, "exec"?, "exe"?:
-            self = .Executable
-        default:
-            throw OptionParserError.InvalidUsage("invalid initialization mode: \(rawValue)")
-        }
-    }
-
-    var description: String {
-        switch self {
-            case .Library: return "library"
-            case .Executable: return "executable"
-        }
-    }
-}
-
 private func ==(lhs: Mode, rhs: Mode) -> Bool {
     return lhs.description == rhs.description
 }
-
-enum ShowDependenciesMode: CustomStringConvertible {
-    case Text, DOT, JSON
-
-    private init(_ rawValue: String?) throws {
-        guard let rawValue = rawValue else {
-            self = .Text
-            return
-        }
-
-        switch rawValue.lowercased() {
-        case "text":
-           self = .Text
-        case "dot":
-           self = .DOT
-        case "json":
-           self = .JSON
-        default:
-            throw OptionParserError.InvalidUsage("invalid show dependencies mode: \(rawValue)")
-        }
-    }
-
-    var description: String {
-        switch self {
-        case .Text: return "text"
-        case .DOT: return "dot"
-        case .JSON: return "json"
-        }
-    }
-}

Sources/Commands/SwiftPackageTool.swift

@@ -0,0 +1,295 @@
+/*
+ This source file is part of the Swift.org open source project
+
+ Copyright 2015 - 2016 Apple Inc. and the Swift project authors
+ Licensed under Apache License v2.0 with Runtime Library Exception
+
+ See http://swift.org/LICENSE.txt for license information
+ See http://swift.org/CONTRIBUTORS.txt for Swift project authors
+*/
+
+import Basic
+import Build
+import Get
+import PackageLoading
+import PackageModel
+import Utility
+import Xcodeproj
+
+#if HasCustomVersionString
+import VersionInfo
+#endif
+
+import enum Build.Configuration
+import enum Utility.ColorWrap
+import protocol Build.Toolchain
+
+import func POSIX.chdir
+
+/// Additional conformance for our Options type.
+extension PackageToolOptions: XcodeprojOptions {}
+
+private enum Mode: Argument, Equatable, CustomStringConvertible {
+    case Init(InitMode)
+    case Doctor
+    case ShowDependencies(ShowDependenciesMode)
+    case Fetch
+    case Update
+    case Usage
+    case Version
+    case GenerateXcodeproj(String?)
+    case DumpPackage(String?)
+
+    init?(argument: String, pop: () -> String?) throws {
+        switch argument {
+        case "init", "initialize":
+            self = try .Init(InitMode(pop()))
+        case "doctor":
+            self = .Doctor
+        case "show-dependencies", "-D":
+            self = try .ShowDependencies(ShowDependenciesMode(pop()))
+        case "fetch":
+            self = .Fetch
+        case "update":
+            self = .Update
+        case "help", "usage", "--help", "-h":
+            self = .Usage
+        case "version":
+            self = .Version
+        case "generate-xcodeproj":
+            self = .GenerateXcodeproj(pop())
+        case "dump-package":
+            self = .DumpPackage(pop())
+        default:
+            return nil
+        }
+    }
+
+    var description: String {
+        switch self {
+        case .Init(let type): return "init=\(type)"
+        case .Doctor: return "doctor"
+        case .ShowDependencies: return "show-dependencies"
+        case .GenerateXcodeproj: return "generate-xcodeproj"
+        case .Fetch: return "fetch"
+        case .Update: return "update"
+        case .Usage: return "help"
+        case .Version: return "version"
+        case .DumpPackage: return "dump-package"
+        }
+    }
+}
+
+private enum PackageToolFlag: Argument {
+    case chdir(String)
+    case colorMode(ColorWrap.Mode)
+    case Xcc(String)
+    case Xld(String)
+    case Xswiftc(String)
+    case xcconfigOverrides(String)
+    case ignoreDependencies
+    case verbose(Int)
+
+    init?(argument: String, pop: () -> String?) throws {
+
+        func forcePop() throws -> String {
+            guard let value = pop() else { throw OptionParserError.ExpectedAssociatedValue(argument) }
+            return value
+        }
+
+        switch argument {
+        case Flag.chdir, Flag.C:
+            self = try .chdir(forcePop())
+        case "--verbose", "-v":
+            self = .verbose(1)
+        case "-vv":
+            self = .verbose(2)
+        case "--color":
+            let rawValue = try forcePop()
+            guard let mode = ColorWrap.Mode(rawValue) else  {
+                throw OptionParserError.InvalidUsage("invalid color mode: \(rawValue)")
+            }
+            self = .colorMode(mode)
+        case "--ignore-dependencies":
+            self = .ignoreDependencies
+        default:
+            return nil
+        }
+    }
+}
+
+private class PackageToolOptions: Options {
+    var verbosity: Int = 0
+    var colorMode: ColorWrap.Mode = .Auto
+    var Xcc: [String] = []
+    var Xld: [String] = []
+    var Xswiftc: [String] = []
+    var xcconfigOverrides: String? = nil
+    var ignoreDependencies: Bool = false
+}
+
+/// swift-build tool namespace
+public struct SwiftPackageTool {
+    let args: [String]
+
+    public init(args: [String]) {
+        self.args = args
+    }
+
+    public func run() {
+        do {
+            let args = Array(Process.arguments.dropFirst())
+            let (mode, opts) = try parse(commandLineArguments: args)
+
+            verbosity = Verbosity(rawValue: opts.verbosity)
+            colorMode = opts.colorMode
+
+            if let dir = opts.chdir {
+                try chdir(dir)
+            }
+
+            func parseManifest(path: String, baseURL: String) throws -> Manifest {
+                let swiftc = ToolDefaults.SWIFT_EXEC
+                let libdir = ToolDefaults.libdir
+                return try Manifest(path: path, baseURL: baseURL, swiftc: swiftc, libdir: libdir)
+            }
+
+            func fetch(_ root: String) throws -> (rootPackage: Package, externalPackages:[Package]) {
+                let manifest = try parseManifest(path: root, baseURL: root)
+                if opts.ignoreDependencies {
+                    return (Package(manifest: manifest, url: manifest.path.parentDirectory), [])
+                } else {
+                    return try get(manifest, manifestParser: parseManifest)
+                }
+            }
+
+            switch mode {
+            case .Init(let initMode):
+                let initPackage = try InitPackage(mode: initMode)
+                try initPackage.writePackageStructure()
+
+            case .Update:
+                try Utility.removeFileTree(opts.path.Packages)
+                fallthrough
+
+            case .Fetch:
+                _ = try fetch(opts.path.root)
+
+            case .Usage:
+                usage()
+
+            case .Doctor:
+                doctor()
+
+            case .ShowDependencies(let mode):
+                let (rootPackage, _) = try fetch(opts.path.root)
+                dumpDependenciesOf(rootPackage: rootPackage, mode: mode)
+
+            case .Version:
+                #if HasCustomVersionString
+                    print(String(cString: VersionInfo.DisplayString()))
+                #else
+                    print("Swift Package Manager – Swift 3.0")
+                #endif
+
+            case .GenerateXcodeproj(let outpath):
+                let (rootPackage, externalPackages) = try fetch(opts.path.root)
+                let (modules, externalModules, products) = try transmute(rootPackage, externalPackages: externalPackages)
+
+                let xcodeModules = modules.flatMap { $0 as? XcodeModuleProtocol }
+                let externalXcodeModules  = externalModules.flatMap { $0 as? XcodeModuleProtocol }
+
+                let projectName: String
+                let dstdir: String
+                let packageName = rootPackage.name
+
+                switch outpath {
+                case let outpath? where outpath.hasSuffix(".xcodeproj"):
+                    // if user specified path ending with .xcodeproj, use that
+                    projectName = String(outpath.basename.characters.dropLast(10))
+                    dstdir = outpath.parentDirectory
+                case let outpath?:
+                    dstdir = outpath
+                    projectName = packageName
+                case _:
+                    dstdir = opts.path.root
+                    projectName = packageName
+                }
+                let outpath = try Xcodeproj.generate(dstdir: dstdir.abspath, projectName: projectName, srcroot: opts.path.root, modules: xcodeModules, externalModules: externalXcodeModules, products: products, options: opts)
+
+                print("generated:", outpath.prettyPath)
+
+            case .DumpPackage(let packagePath):
+
+                let root = packagePath ?? opts.path.root
+                let manifest = try parseManifest(path: root, baseURL: root)
+                let package = manifest.package
+                let json = try jsonString(package: package)
+                print(json)
+            }
+
+        } catch {
+            handle(error: error, usage: usage)
+        }
+    }
+
+    private func usage(_ print: (String) -> Void = { print($0) }) {
+        //     .........10.........20.........30.........40.........50.........60.........70..
+        print("OVERVIEW: Perform operations on a swift package")
+        print("")
+        print("USAGE: swift package [command] [options]")
+        print("")
+        print("COMMANDS:")
+        print("  init[=<type>]                 Initialize a new package (executable|library)")
+        print("  fetch                         Fetch package dependencies")
+        print("  update                        Update package dependencies")
+        print("  generate-xcodeproj[=<path>]   Generates an Xcode project")
+        print("  show-dependencies[=<format>]  Print dependency graph (text|dot|json)")
+        print("  dump-package[=<path>]         Print Package.swift as JSON")
+        print("")
+        print("OPTIONS:")
+        print("  --chdir <path>       Change working directory before any command [-C]")
+        print("  --color <mode>       Specify color mode (auto|always|never)")
+        print("  --verbose            Increase verbosity of informational output [-v]")
+        print("  -Xcc <flag>          Pass flag through to all C compiler instantiations")
+        print("  -Xlinker <flag>      Pass flag through to all linker instantiations")
+        print("  -Xswiftc <flag>      Pass flag through to all Swift compiler instantiations")
+        print("")
+    }
+
+    private func parse(commandLineArguments args: [String]) throws -> (Mode, PackageToolOptions) {
+        let (mode, flags): (Mode?, [PackageToolFlag]) = try Basic.parseOptions(arguments: args)
+
+        let opts = PackageToolOptions()
+        for flag in flags {
+            switch flag {
+            case .chdir(let path):
+                opts.chdir = path
+            case .Xcc(let value):
+                opts.Xcc.append(value)
+            case .Xld(let value):
+                opts.Xld.append(value)
+            case .Xswiftc(let value):
+                opts.Xswiftc.append(value)
+            case .verbose(let amount):
+                opts.verbosity += amount
+            case .colorMode(let mode):
+                opts.colorMode = mode
+            case .xcconfigOverrides(let path):
+                opts.xcconfigOverrides = path
+            case .ignoreDependencies:
+                opts.ignoreDependencies = true
+            }
+        }
+        if let mode = mode {
+            return (mode, opts)
+        }
+        else {
+            throw OptionParserError.InvalidUsage("no command provided: \(args)")
+        }
+    }
+}
+
+private func ==(lhs: Mode, rhs: Mode) -> Bool {
+    return lhs.description == rhs.description
+}