Fix binary ABI detection.

Author: aebrahim

packages/vector_graphics_compiler/lib/src/_bin_root.dart

@@ -0,0 +1,44 @@
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'dart:ffi';
+import 'dart:io';
+
+/// Get executable root directory
+String binRootDir() {
+  final Directory cacheRoot;
+  if (Platform.resolvedExecutable.contains('flutter_tester')) {
+    cacheRoot = File(Platform.resolvedExecutable).parent.parent.parent.parent;
+  } else if (Platform.resolvedExecutable.contains('dart')) {
+    cacheRoot = File(Platform.resolvedExecutable).parent.parent.parent;
+  } else {
+    throw Exception('Unknown executable: ${Platform.resolvedExecutable}');
+  }
+  final String platform;
+  if (Platform.isWindows) {
+    if (Abi.current() == Abi.windowsX64) {
+      platform = 'windows-x64';
+    } else if (Abi.current() == Abi.windowsArm64) {
+      platform = 'windows-arm64';
+    } else {
+      throw Exception('Unsupported ABI: ${Abi.current()}');
+    }
+  } else if (Platform.isMacOS) {
+    platform = 'darwin-x64';
+  } else if (Platform.isLinux) {
+    if (Abi.current() == Abi.linuxX64) {
+      platform = 'linux-x64';
+    } else if (Abi.current() == Abi.linuxArm64) {
+      platform = 'linux-arm64';
+    } else {
+      throw Exception('Unsupported ABI: ${Abi.current()}');
+    }
+  } else {
+    throw Exception('Cannot identify platform ${Platform.localeName}');
+  }
+  final String output = '${cacheRoot.path}/artifacts/engine/$platform/';
+  if (!Directory(output).existsSync()) {
+    throw Exception('Could not find directory $output for executables');
+  }
+  return output;
+}

packages/vector_graphics_compiler/lib/src/_initialize_path_ops_io.dart

@@ -3,37 +3,24 @@
 // found in the LICENSE file.
 
 import 'dart:io';
+
+import '_bin_root.dart';
 import 'svg/path_ops.dart';
 
 /// Look up the location of the pathops from flutter's artifact cache.
 bool initializePathOpsFromFlutterCache() {
-  final Directory cacheRoot;
-  if (Platform.resolvedExecutable.contains('flutter_tester')) {
-    cacheRoot = File(Platform.resolvedExecutable).parent.parent.parent.parent;
-  } else if (Platform.resolvedExecutable.contains('dart')) {
-    cacheRoot = File(Platform.resolvedExecutable).parent.parent.parent;
-  } else {
-    print('Unknown executable: ${Platform.resolvedExecutable}');
-    return false;
-  }
-
-  final String platform;
   final String executable;
   if (Platform.isWindows) {
-    platform = 'windows-x64';
     executable = 'path_ops.dll';
   } else if (Platform.isMacOS) {
-    platform = 'darwin-x64';
     executable = 'libpath_ops.dylib';
   } else if (Platform.isLinux) {
-    platform = 'linux-x64';
     executable = 'libpath_ops.so';
   } else {
     print('path_ops not supported on ${Platform.localeName}');
     return false;
   }
-  final String pathops =
-      '${cacheRoot.path}/artifacts/engine/$platform/$executable';
+  final String pathops =  '${binRootDir()}/$executable';
   if (!File(pathops).existsSync()) {
     print('Could not locate libpathops at $pathops.');
     print('Ensure you are on a supported version of flutter and then run ');

packages/vector_graphics_compiler/lib/src/_initialize_tessellator_io.dart

@@ -3,37 +3,24 @@
 // found in the LICENSE file.
 
 import 'dart:io';
+
+import '_bin_root.dart';
 import 'svg/tessellator.dart';
 
 /// Look up the location of the tessellator from flutter's artifact cache.
 bool initializeTessellatorFromFlutterCache() {
-  final Directory cacheRoot;
-  if (Platform.resolvedExecutable.contains('flutter_tester')) {
-    cacheRoot = File(Platform.resolvedExecutable).parent.parent.parent.parent;
-  } else if (Platform.resolvedExecutable.contains('dart')) {
-    cacheRoot = File(Platform.resolvedExecutable).parent.parent.parent;
-  } else {
-    print('Unknown executable: ${Platform.resolvedExecutable}');
-    return false;
-  }
-
-  final String platform;
   final String executable;
   if (Platform.isWindows) {
-    platform = 'windows-x64';
     executable = 'libtessellator.dll';
   } else if (Platform.isMacOS) {
-    platform = 'darwin-x64';
     executable = 'libtessellator.dylib';
   } else if (Platform.isLinux) {
-    platform = 'linux-x64';
     executable = 'libtessellator.so';
   } else {
     print('Tesselation not supported on ${Platform.localeName}');
     return false;
   }
-  final String tessellator =
-      '${cacheRoot.path}/artifacts/engine/$platform/$executable';
+  final String tessellator = '${binRootDir()}/$executable';
   if (!File(tessellator).existsSync()) {
     print('Could not locate libtessellator at $tessellator.');
     print('Ensure you are on a supported version of flutter and then run ');