Parse dump-pif result and reduce XCBuildSupport dependency

[giginet]

Use swift package dump-pif to construct PIF instead of the internal implementation of SwiftPM.

Using dump-pif command, we can reduce dependency and we can use stable specs.
Our final goal is to remove the XCBuildSupport dependency.

This PR introduces SwiftyJSON to manipulate PIFs. because it's tough to define a complete PIF using Codable. We only need a subset of PIF.

Instead, I concluded the JSON manipulation into the PIFKit target. ScipioKit can manipulate PIF in type-safe.

[ikesyo]

Suggested change

	func canParseTarget() async throws {
	func canParseTarget() throws {

[ikesyo]

Suggested change

	let jsonData = try #require(FixtureLoader.load(named: "target.json"))
	let jsonData = try #require(FixtureLoader.load(named: "Target.json"))

or rename the json file to target.json.

[ikesyo]

Suggested change

	static func load(named filename: String) -> Data? {
	let url = URL(filePath: #filePath)
	.deletingLastPathComponent()
	.appending(components: "Fixtures", filename)
	let fileManager = FileManager.default
	return fileManager.contents(atPath: url.path)
	}
	static func load(named filename: String) throws -> Data {
	let url = URL(filePath: #filePath)
	.deletingLastPathComponent()
	.appending(components: "Fixtures", filename)
	return try Data(contentsOf: url)
	}

[ikesyo]

This test doesn't decode the encoded data.

Suggested change

	let encoder = JSONEncoder()
	_ = try String(data: encoder.encode(configuration), encoding: .utf8)
	let redecoded = try decoder.decode(BuildConfiguration.self, from: fixtureData)
	#expect(configuration == redecoded)
	let encoder = JSONEncoder()
	let encoded = try encoder.encode(configuration)
	let redecoded = try decoder.decode(BuildConfiguration.self, from: encoded)
	#expect(configuration == redecoded)

[ikesyo]

Suggested change

	private static let appendingFixtures: [(BuildConfiguration.MacroExpressionValue?, [String])] = [
	(.bool(false), ["NO", "added"]),
	(.bool(true), ["YES", "added"]),
	(.string("foo"), ["foo", "added"]),
	(.stringList(["foo", "bar"]), ["foo", "bar", "added"]),
	(nil, ["$(inherited)", "added"]),
	]
	@Test("can append flags", arguments: appendingFixtures)
	func appending(setting: BuildConfiguration.MacroExpressionValue?, expected: [String]) {
	private static let appendingFixtures: [(BuildConfiguration.MacroExpressionValue?, [String])] = [
	(.bool(false), ["NO", "added"]),
	(.bool(true), ["YES", "added"]),
	(.string("foo"), ["foo", "added"]),
	(.stringList(["foo", "bar"]), ["foo", "bar", "added"]),
	(nil, ["$(inherited)", "added"]),
	]
	@Test("can append flags", arguments: appendingFixtures)
	func appending(setting: BuildConfiguration.MacroExpressionValue?, expected: [String]) {

[ikesyo]

Suggested change

	)
	),

[ikesyo]

It would be better to reuse a single JSONEncoder I think.

Suggested change

	pifObject["contents"]["buildConfigurations"].arrayObject = target.buildConfigurations.compactMap { try? $0.toJSON() }
	}
	let jsonEncoder = JSONEncoder()
	pifObject["contents"]["buildConfigurations"].arrayObject = target.buildConfigurations.compactMap { try? $0.toJSON(using: jsonEncoder) }
	}

[ikesyo]

Suggested change

	if case .string(let moduleMapFileContents) = configuration.buildSettings["MODULEMAP_FILE_CONTENTS"],
	moduleMapFileContents.contains("\(target.name)-Swift.h") {
	resolveModuleMapPath(of: target, configuration: &configuration, sdk: sdk)
	if case .string(let moduleMapFileContents) = configuration.buildSettings["MODULEMAP_FILE_CONTENTS"],
	moduleMapFileContents.contains("\(target.name)-Swift.h")
	{
	resolveModuleMapPath(of: target, configuration: &configuration, sdk: sdk)

would be more readable (for me).

[ikesyo]

SDKROOT is added, for what reason is that required?

[ikesyo]

Because we don't use PIFBuilder.generatePIF anymore, only buildParameters.toolchain.toolchainLibDir is needed. How about passing the specific value instead of the entire BuildParameters?