Allows Flutter to list and debug iOS devices on non-Macs. Requires Flutter 1.12.13+hotfix.9 because the Flutter team switched to Apple-specific tools. See https://medium.com/flutter-community/developing-and-debugging-flutter-apps-for-ios-without-a-mac-8d362a8ec667

ios.diff

diff --git a/packages/flutter_tools/lib/src/artifacts.dart b/packages/flutter_tools/lib/src/artifacts.dart
index 9544a18f7..d72e28bd4 100644
--- a/packages/flutter_tools/lib/src/artifacts.dart
+++ b/packages/flutter_tools/lib/src/artifacts.dart
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'dart:io';
+
 import 'package:meta/meta.dart';
 
 import 'base/context.dart';
@@ -256,17 +258,15 @@ class CachedArtifacts extends Artifacts {
       case Artifact.idevicescreenshot:
       case Artifact.idevicesyslog:
       case Artifact.idevicename:
-        final String artifactFileName = _artifactToFileName(artifact);
-        return cache.getArtifactDirectory('libimobiledevice').childFile(artifactFileName).path;
       case Artifact.iosDeploy:
-        final String artifactFileName = _artifactToFileName(artifact);
-        return cache.getArtifactDirectory('ios-deploy').childFile(artifactFileName).path;
       case Artifact.ideviceinstaller:
-        final String artifactFileName = _artifactToFileName(artifact);
-        return cache.getArtifactDirectory('ideviceinstaller').childFile(artifactFileName).path;
       case Artifact.iproxy:
         final String artifactFileName = _artifactToFileName(artifact);
-        return cache.getArtifactDirectory('usbmuxd').childFile(artifactFileName).path;
+        final ProcessResult whichResult = Process.runSync('which', <String>[artifactFileName]);
+        if (whichResult.exitCode != 0) {
+          throw UnsupportedError('$artifactFileName is not in the path, please install the dependencies following the article, and add it to the PATH if necessary');
+        }
+        return whichResult.stdout.toString().trimRight();
       default:
         return _getHostArtifactPath(artifact, platform, mode);
     }
diff --git a/packages/flutter_tools/lib/src/ios/devices.dart b/packages/flutter_tools/lib/src/ios/devices.dart
index b11a627b7..23659c95c 100644
--- a/packages/flutter_tools/lib/src/ios/devices.dart
+++ b/packages/flutter_tools/lib/src/ios/devices.dart
@@ -106,7 +106,7 @@ class IOSDevices extends PollingDeviceDiscovery {
   IOSDevices() : super('iOS devices');
 
   @override
-  bool get supportsPlatform => platform.isMacOS;
+  bool get supportsPlatform => true;
 
   @override
   bool get canListAnything => iosWorkflow.canListDevices;
@@ -172,10 +172,8 @@ class IOSDevice extends Device {
   bool get supportsStartPaused => false;
 
   static Future<List<IOSDevice>> getAttachedDevices() async {
-    if (!platform.isMacOS) {
-      throw UnsupportedError('Control of iOS devices or simulators only supported on Mac OS.');
-    }
     if (!iMobileDevice.isInstalled) {
+      printError("libimobiledevice doesn't seem to be installed, reread the instalation steps or leave a comment in the article");
       return <IOSDevice>[];
     }
 
@@ -208,9 +206,6 @@ class IOSDevice extends Device {
       apps = await processUtils.run(
         <String>[_installerPath, '--list-apps'],
         throwOnError: true,
-        environment: Map<String, String>.fromEntries(
-          <MapEntry<String, String>>[cache.dyLdLibEntry],
-        ),
       );
     } on ProcessException {
       return false;
@@ -233,9 +228,6 @@ class IOSDevice extends Device {
       await processUtils.run(
         <String>[_installerPath, '-i', app.deviceBundlePath],
         throwOnError: true,
-        environment: Map<String, String>.fromEntries(
-          <MapEntry<String, String>>[cache.dyLdLibEntry],
-        ),
       );
       return true;
     } on ProcessException catch (error) {
@@ -250,9 +242,6 @@ class IOSDevice extends Device {
       await processUtils.run(
         <String>[_installerPath, '-U', app.id],
         throwOnError: true,
-        environment: Map<String, String>.fromEntries(
-          <MapEntry<String, String>>[cache.dyLdLibEntry],
-        ),
       );
       return true;
     } on ProcessException catch (error) {
@@ -707,9 +696,6 @@ class IOSDevicePortForwarder extends DevicePortForwarder {
           devicePort.toString(),
           device.id,
         ],
-        environment: Map<String, String>.fromEntries(
-          <MapEntry<String, String>>[cache.dyLdLibEntry],
-        ),
       );
       // TODO(ianh): This is a flakey race condition, https://github.com/libimobiledevice/libimobiledevice/issues/674
       connected = !await process.stdout.isEmpty.timeout(_kiProxyPortForwardTimeout, onTimeout: () => false);
diff --git a/packages/flutter_tools/lib/src/ios/ios_workflow.dart b/packages/flutter_tools/lib/src/ios/ios_workflow.dart
index ac9630ba9..5913050d4 100644
--- a/packages/flutter_tools/lib/src/ios/ios_workflow.dart
+++ b/packages/flutter_tools/lib/src/ios/ios_workflow.dart
@@ -17,7 +17,7 @@ class IOSWorkflow implements Workflow {
 
   // We need xcode (+simctl) to list simulator devices, and libimobiledevice to list real devices.
   @override
-  bool get canListDevices => xcode.isInstalledAndMeetsVersionCheck && xcode.isSimctlInstalled;
+  bool get canListDevices => true;
 
   // We need xcode to launch simulator devices, and ideviceinstaller and ios-deploy
   // for real devices.
diff --git a/packages/flutter_tools/lib/src/ios/mac.dart b/packages/flutter_tools/lib/src/ios/mac.dart
index dd5597f62..bb2576520 100644
--- a/packages/flutter_tools/lib/src/ios/mac.dart
+++ b/packages/flutter_tools/lib/src/ios/mac.dart
@@ -97,7 +97,9 @@ class IMobileDevice {
         _ideviceinfoPath = artifacts.getArtifactPath(Artifact.ideviceinfo, platform: TargetPlatform.ios),
         _idevicenamePath = artifacts.getArtifactPath(Artifact.idevicename, platform: TargetPlatform.ios),
         _idevicesyslogPath = artifacts.getArtifactPath(Artifact.idevicesyslog, platform: TargetPlatform.ios),
-        _idevicescreenshotPath = artifacts.getArtifactPath(Artifact.idevicescreenshot, platform: TargetPlatform.ios);
+        _idevicescreenshotPath = artifacts.getArtifactPath(Artifact.idevicescreenshot, platform: TargetPlatform.ios) {
+          assert(artifacts.runtimeType == CachedArtifacts);
+        }
 
   final String _ideviceIdPath;
   final String _ideviceinfoPath;
@@ -111,9 +113,6 @@ class IMobileDevice {
         _ideviceIdPath,
         '-h',
       ],
-      environment: Map<String, String>.fromEntries(
-        <MapEntry<String, String>>[cache.dyLdLibEntry]
-      ),
     );
     return _isInstalled;
   }
@@ -176,11 +175,12 @@ class IMobileDevice {
           _ideviceIdPath,
           '-l',
         ],
-        environment: Map<String, String>.fromEntries(
-          <MapEntry<String, String>>[cache.dyLdLibEntry]
-        ),
       );
       if (result.exitCode != 0) {
+        if (result.stderr.toString().contains('ERROR: Unable to retrieve device list!')) {
+          // idevice_id might throw this error if there are no connected devices
+          return '';
+        }
         throw ToolExit('idevice_id returned an error:\n${result.stderr}');
       }
       return result.stdout as String;
@@ -199,9 +199,6 @@ class IMobileDevice {
           '-k',
           key,
         ],
-        environment: Map<String, String>.fromEntries(
-          <MapEntry<String, String>>[cache.dyLdLibEntry]
-        ),
       );
       final String stdout = result.stdout as String;
       final String stderr = result.stderr as String;
@@ -239,9 +236,6 @@ class IMobileDevice {
         '-u',
         deviceID,
       ],
-      environment: Map<String, String>.fromEntries(
-        <MapEntry<String, String>>[cache.dyLdLibEntry]
-      ),
     );
   }
 
@@ -253,9 +247,6 @@ class IMobileDevice {
         outputFile.path,
       ],
       throwOnError: true,
-      environment: Map<String, String>.fromEntries(
-        <MapEntry<String, String>>[cache.dyLdLibEntry]
-      ),
     );
   }
 }

error: patch failed: packages/flutter_tools/lib/src/artifacts.dart:2
error: packages/flutter_tools/lib/src/artifacts.dart: patch does not apply
error: patch failed: packages/flutter_tools/lib/src/ios/devices.dart:106
error: packages/flutter_tools/lib/src/ios/devices.dart: patch does not apply
error: patch failed: packages/flutter_tools/lib/src/ios/ios_workflow.dart:17
error: packages/flutter_tools/lib/src/ios/ios_workflow.dart: patch does not apply
error: patch failed: packages/flutter_tools/lib/src/ios/mac.dart:97
error: packages/flutter_tools/lib/src/ios/mac.dart: patch does not apply

Yeah I know. Sorry, Flutter has made a lot of changes and this patch is no longer compatible. Even if the patch were compatible, Flutter doesn't allow launching debug mode apps from the home screen on iOS anymore. I recommend using a macOS VM, and usbfluxd: https://gist.github.com/gabrc52/2960d9905b835bdf750fc54f983d0412 (requires Linux host, untested on WSL)