Allow omitting the target triple for swift sdk configure

Sources/PackageManagerDocs/Documentation.docc/SDK/SDKConfigure.md

@@ -8,7 +8,7 @@
 Manages configuration options for installed Swift SDKs.
 
 ```
-sdk configure [--package-path=<package-path>] [--cache-path=<cache-path>] [--config-path=<config-path>] [--security-path=<security-path>] [--scratch-path=<scratch-path>]     [--swift-sdks-path=<swift-sdks-path>] [--toolset=<toolset>...] [--pkg-config-path=<pkg-config-path>...]   [--sdk-root-path=<sdk-root-path>] [--swift-resources-path=<swift-resources-path>] [--swift-static-resources-path=<swift-static-resources-path>] [--include-search-path=<include-search-path>...] [--library-search-path=<library-search-path>...] [--toolset-path=<toolset-path>...] [--reset] [--show-configuration] <sdk-id> <target-triple> [--version] [--help]
+sdk configure [--package-path=<package-path>] [--cache-path=<cache-path>] [--config-path=<config-path>] [--security-path=<security-path>] [--scratch-path=<scratch-path>]     [--swift-sdks-path=<swift-sdks-path>] [--toolset=<toolset>...] [--pkg-config-path=<pkg-config-path>...]   [--sdk-root-path=<sdk-root-path>] [--swift-resources-path=<swift-resources-path>] [--swift-static-resources-path=<swift-static-resources-path>] [--include-search-path=<include-search-path>...] [--library-search-path=<library-search-path>...] [--toolset-path=<toolset-path>...] [--reset] [--show-configuration] <sdk-id> [<target-triple>] [--version] [--help]
 ```
 
 - term **--package-path=\<package-path\>**:

Sources/PackageModel/SwiftSDKs/SwiftSDK.swift

@@ -53,7 +53,7 @@ public enum SwiftSDKError: Swift.Error {
     case unserializableMetadata
 
     /// No configuration values are available for this Swift SDK and target triple.
-    case swiftSDKNotFound(artifactID: String, hostTriple: Triple, targetTriple: Triple)
+    case swiftSDKNotFound(artifactID: String, hostTriple: Triple, targetTriple: Triple?)
 
     /// A Swift SDK bundle with this name is already installed, can't install a new bundle with the same name.
     case swiftSDKBundleAlreadyInstalled(bundleName: String)
@@ -108,10 +108,17 @@ extension SwiftSDKError: CustomStringConvertible {
             properties required for initialization
             """
         case .swiftSDKNotFound(let artifactID, let hostTriple, let targetTriple):
-            return """
-            Swift SDK with ID `\(artifactID)`, host triple \(hostTriple), and target triple \(targetTriple) is not \
-            currently installed.
-            """
+            if let targetTriple {
+                return """
+                Swift SDK with ID `\(artifactID)`, host triple \(hostTriple), and target triple \(targetTriple) is not \
+                currently installed.
+                """
+            } else {
+                return """
+                Swift SDK with ID `\(artifactID)` is not \
+                currently installed.
+                """
+            }
         case .swiftSDKBundleAlreadyInstalled(let bundleName):
             return """
             Swift SDK bundle with name `\(bundleName)` is already installed. Can't install a new bundle \

Sources/PackageModel/SwiftSDKs/SwiftSDKConfigurationStore.swift

@@ -85,6 +85,22 @@ public final class SwiftSDKConfigurationStore {
         try encoder.encode(path: configurationPath, fileSystem: fileSystem, properties)
     }
 
+    public func swiftSDKs(for id: String) throws -> [SwiftSDK] {
+        for bundle in try self.swiftSDKBundleStore.allValidBundles {
+            for (artifactID, variants) in bundle.artifacts {
+                guard artifactID == id else {
+                    continue
+                }
+
+                for variant in variants {
+                    return variant.swiftSDKs
+                }
+            }
+        }
+
+        return []
+    }
+
     public func readConfiguration(
         sdkID: String,
         targetTriple: Triple

Sources/SwiftSDKCommand/ConfigureSwiftSDK.swift

@@ -90,7 +90,7 @@ struct ConfigureSwiftSDK: AsyncParsableCommand {
     var sdkID: String
 
     @Argument(help: "The target triple of the Swift SDK to configure.")
-    var targetTriple: String
+    var targetTriple: String?
 
     /// The file system used by default by this command.
     private var fileSystem: FileSystem { localFileSystem }
@@ -132,8 +132,24 @@ struct ConfigureSwiftSDK: AsyncParsableCommand {
                 hostTimeTriple: triple,
                 swiftSDKBundleStore: bundleStore
             )
-            let targetTriple = try Triple(self.targetTriple)
 
+            let targetTriples: [Triple]
+            if let targetTriple = self.targetTriple {
+                targetTriples = try [Triple(targetTriple)]
+            } else {
+                // when target-triple is unspecified, configure every triple for the SDK
+                let validBundles = try configurationStore.swiftSDKs(for: sdkID)
+                targetTriples = validBundles.compactMap(\.targetTriple)
+                if targetTriples.isEmpty {
+                    throw SwiftSDKError.swiftSDKNotFound(
+                        artifactID: sdkID,
+                        hostTriple: triple,
+                        targetTriple: nil
+                    )
+                }
+            }
+
+            for targetTriple in targetTriples {
             guard let swiftSDK = try configurationStore.readConfiguration(
                 sdkID: sdkID,
                 targetTriple: targetTriple
@@ -216,6 +232,7 @@ struct ConfigureSwiftSDK: AsyncParsableCommand {
 
                 var swiftSDK = swiftSDK
                 swiftSDK.pathsConfiguration = configuration
+                swiftSDK.targetTriple = targetTriple
                 try configurationStore.updateConfiguration(sdkID: sdkID, swiftSDK: swiftSDK)
 
                 observabilityScope.emit(
@@ -229,6 +246,7 @@ struct ConfigureSwiftSDK: AsyncParsableCommand {
             if observabilityScope.errorsReported {
                 throw ExitCode.failure
             }
+            }
         } catch {
             commandError = error
         }