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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift open source project
//
// Copyright (c) 2022 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 the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import Dispatch
import class Foundation.JSONDecoder
private let defaultImports = ["Swift", "SwiftOnoneSupport", "_Concurrency",
"_StringProcessing", "_SwiftConcurrencyShims"]
private struct Imports: Decodable {
let imports: [String]
}
package protocol ImportScanner {
func scanImports(_ filePathToScan: AbsolutePath) async throws -> [String]
}
public struct SwiftcImportScanner: ImportScanner {
private let swiftCompilerEnvironment: Environment
private let swiftCompilerFlags: [String]
private let swiftCompilerPath: AbsolutePath
package init(
swiftCompilerEnvironment: Environment,
swiftCompilerFlags: [String],
swiftCompilerPath: AbsolutePath
) {
self.swiftCompilerEnvironment = swiftCompilerEnvironment
self.swiftCompilerFlags = swiftCompilerFlags
self.swiftCompilerPath = swiftCompilerPath
}
public func scanImports(_ filePathToScan: AbsolutePath) async throws -> [String] {
let cmd = [swiftCompilerPath.pathString,
filePathToScan.pathString,
"-scan-dependencies", "-Xfrontend", "-import-prescan"] + self.swiftCompilerFlags
let result = try await AsyncProcess.popen(arguments: cmd, environment: self.swiftCompilerEnvironment)
let stdout = try result.utf8Output()
return try JSONDecoder.makeWithDefaults().decode(Imports.self, from: stdout).imports
.filter { !defaultImports.contains($0) }
}
}
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