From 89074ccb507dbd46a6442e3ff06c1108d3eab840 Mon Sep 17 00:00:00 2001
From: Ellen Shapiro <designatednerd@gmail.com>
Date: Tue, 25 Feb 2020 15:14:19 -0600
Subject: [PATCH] Add defensive @available guards to prevent accidental
 compilation on unsupported platforms.

---
 Sources/ApolloCodegenLib/ApolloCLI.swift              | 1 +
 Sources/ApolloCodegenLib/ApolloCodegen.swift          | 1 +
 Sources/ApolloCodegenLib/ApolloSchemaDownloader.swift | 1 +
 Sources/ApolloCodegenLib/Basher.swift                 | 1 +
 Sources/ApolloCodegenLib/CLIDownloader.swift          | 1 +
 Sources/ApolloCodegenLib/CLIExtractor.swift           | 1 +
 6 files changed, 6 insertions(+)

diff --git a/Sources/ApolloCodegenLib/ApolloCLI.swift b/Sources/ApolloCodegenLib/ApolloCLI.swift
index 816f8513f5..7611c66012 100644
--- a/Sources/ApolloCodegenLib/ApolloCLI.swift
+++ b/Sources/ApolloCodegenLib/ApolloCLI.swift
@@ -1,6 +1,7 @@
 import Foundation
 
 /// Wrapper for calling the bundled node-based Apollo CLI.
+@available(OSX, message: "Only available on macOS")
 public struct ApolloCLI {
   
   /// Creates an instance of `ApolloCLI`, downloading and extracting if needed
diff --git a/Sources/ApolloCodegenLib/ApolloCodegen.swift b/Sources/ApolloCodegenLib/ApolloCodegen.swift
index 327d73ae95..1dd948256c 100644
--- a/Sources/ApolloCodegenLib/ApolloCodegen.swift
+++ b/Sources/ApolloCodegenLib/ApolloCodegen.swift
@@ -1,6 +1,7 @@
 import Foundation
 
 /// A class to facilitate running code generation
+@available(OSX, message: "Only available on macOS")
 public class ApolloCodegen {
   
   /// Errors which can happen with code generation
diff --git a/Sources/ApolloCodegenLib/ApolloSchemaDownloader.swift b/Sources/ApolloCodegenLib/ApolloSchemaDownloader.swift
index e9433e4954..b39ad8d5cf 100644
--- a/Sources/ApolloCodegenLib/ApolloSchemaDownloader.swift
+++ b/Sources/ApolloCodegenLib/ApolloSchemaDownloader.swift
@@ -1,6 +1,7 @@
 import Foundation
 
 /// A wrapper to facilitate downloading a schema with the Apollo node CLI
+@available(OSX, message: "Only available on macOS")
 public struct ApolloSchemaDownloader {
   
   /// Runs code generation from the given folder with the passed-in options
diff --git a/Sources/ApolloCodegenLib/Basher.swift b/Sources/ApolloCodegenLib/Basher.swift
index b91dd3b5d5..e6b4d110a1 100644
--- a/Sources/ApolloCodegenLib/Basher.swift
+++ b/Sources/ApolloCodegenLib/Basher.swift
@@ -1,6 +1,7 @@
 import Foundation
 
 /// Bash command runner
+@available(OSX, message: "Only available on macOS")
 public struct Basher {
   
   public enum BashError: Error, LocalizedError {
diff --git a/Sources/ApolloCodegenLib/CLIDownloader.swift b/Sources/ApolloCodegenLib/CLIDownloader.swift
index 4fbad1d0ff..020d44c522 100644
--- a/Sources/ApolloCodegenLib/CLIDownloader.swift
+++ b/Sources/ApolloCodegenLib/CLIDownloader.swift
@@ -1,6 +1,7 @@
 import Foundation
 
 /// Helper for downloading the CLI Zip file so we don't have to include it in the repo.
+@available(OSX, message: "Only available on macOS")
 struct CLIDownloader {
   
   enum CLIDownloaderError: Error, LocalizedError {
diff --git a/Sources/ApolloCodegenLib/CLIExtractor.swift b/Sources/ApolloCodegenLib/CLIExtractor.swift
index 49c7377ce1..0bd26615b3 100644
--- a/Sources/ApolloCodegenLib/CLIExtractor.swift
+++ b/Sources/ApolloCodegenLib/CLIExtractor.swift
@@ -1,6 +1,7 @@
 import Foundation
 
 /// Helper for extracting and validating the node-based Apollo CLI from a zip.
+@available(OSX, message: "Only available on macOS")
 struct CLIExtractor {
   
   // MARK: - Extracting the binary