[SR-6347] Dynamically determine other tool names

Author: MrNickBarker

Sources/Commands/SwiftBuildTool.swift

@@ -38,7 +38,7 @@ public class SwiftBuildTool: SwiftTool<BuildToolOptions> {
             usage: "[options]",
             overview: "Build sources into binary products",
             args: args,
-            seeAlso: "swift run, swift package, swift test"
+            seeAlso: type(of: self).otherToolNames()
         )
     }
 
@@ -179,3 +179,9 @@ fileprivate extension BuildSubset {
         }
     }
 }
+
+extension SwiftBuildTool: ToolName {
+    static var toolName: String {
+        return "swift build"
+    }
+}

Sources/Commands/SwiftPackageTool.swift

@@ -38,7 +38,7 @@ public class SwiftPackageTool: SwiftTool<PackageToolOptions> {
             usage: "[options] subcommand",
             overview: "Perform operations on Swift packages",
             args: args,
-            seeAlso: "swift build, swift run, swift test"
+            seeAlso: type(of: self).otherToolNames()
         )
     }
     override func runImpl() throws {
@@ -471,3 +471,9 @@ extension PackageToolOptions.CompletionToolMode: StringEnumArgument {
         ])
     }
 }
+
+extension SwiftPackageTool: ToolName {
+    static var toolName: String {
+        return "swift package"
+    }
+}

Sources/Commands/SwiftRunTool.swift

@@ -90,7 +90,7 @@ public class SwiftRunTool: SwiftTool<RunToolOptions> {
             usage: "[options] [executable [arguments ...]]",
             overview: "Build and run an executable product",
             args: args,
-            seeAlso: "swift build, swift package, swift test"
+            seeAlso: type(of: self).otherToolNames()
         )
     }
 
@@ -188,3 +188,8 @@ public class SwiftRunTool: SwiftTool<RunToolOptions> {
     }
 }
 
+extension SwiftRunTool: ToolName {
+    static var toolName: String {
+        return "swift run"
+    }
+}

Sources/Commands/SwiftTestTool.swift

@@ -116,7 +116,7 @@ public class SwiftTestTool: SwiftTool<TestToolOptions> {
             usage: "[options]",
             overview: "Build and run tests",
             args: args,
-            seeAlso: "swift build, swift run, swift package"
+            seeAlso: type(of: self).otherToolNames()
         )
     }
 
@@ -621,3 +621,9 @@ fileprivate extension Sequence where Iterator.Element == TestSuite {
         }
     }
 }
+
+extension SwiftTestTool: ToolName {
+    static var toolName: String {
+        return "swift test"
+    }
+}

Sources/Commands/SwiftTool.swift

@@ -104,6 +104,17 @@ private class ToolWorkspaceDelegate: WorkspaceDelegate {
     }
 }
 
+protocol ToolName {
+    static var toolName: String { get }
+}
+
+extension ToolName {
+    static func otherToolNames() -> String {
+        let allTools: [ToolName.Type] = [SwiftBuildTool.self, SwiftRunTool.self, SwiftPackageTool.self, SwiftTestTool.self]
+        return  allTools.filter({ $0 != self }).map({ $0.toolName }).joined(separator: ", ")
+    }
+}
+
 public class SwiftTool<Options: ToolOptions> {
     /// The original working directory.
     let originalWorkingDirectory: AbsolutePath