Update get.py to support Apple ARM64

Author: me-no-dev

tools/get.py

@@ -181,20 +181,34 @@ def load_tools_list(filename, platform):
     for t in tools_info:
         tool_platform = [p for p in t['systems'] if p['host'] == platform]
         if len(tool_platform) == 0:
-            continue
+            # Fallback to x86 on Apple ARM
+            if platform == 'arm64-apple-darwin':
+                tool_platform = [p for p in t['systems'] if p['host'] == 'x86_64-apple-darwin']
+                if len(tool_platform) == 0:
+                    continue
+            # Fallback to 32bit on 64bit x86 Windows
+            elif platform == 'x86_64-mingw32':
+                tool_platform = [p for p in t['systems'] if p['host'] == 'i686-mingw32']
+                if len(tool_platform) == 0:
+                    continue
+            else:
+                continue
         tools_to_download.append(tool_platform[0])
     return tools_to_download
 
 def identify_platform():
-    arduino_platform_names = {'Darwin'  : {32 : 'i386-apple-darwin',   64 : 'x86_64-apple-darwin'},
-                              'Linux'   : {32 : 'i686-pc-linux-gnu',   64 : 'x86_64-pc-linux-gnu'},
-                              'LinuxARM': {32 : 'arm-linux-gnueabihf', 64 : 'aarch64-linux-gnu'},
-                              'Windows' : {32 : 'i686-mingw32',        64 : 'i686-mingw32'}}
+    arduino_platform_names = {'Darwin'   : {32 : 'i386-apple-darwin',   64 : 'x86_64-apple-darwin'},
+                              'DarwinARM': {32 : 'arm64-apple-darwin',  64 : 'arm64-apple-darwin'},
+                              'Linux'    : {32 : 'i686-pc-linux-gnu',   64 : 'x86_64-pc-linux-gnu'},
+                              'LinuxARM' : {32 : 'arm-linux-gnueabihf', 64 : 'aarch64-linux-gnu'},
+                              'Windows'  : {32 : 'i686-mingw32',        64 : 'x86_64-mingw32'}}
     bits = 32
     if sys.maxsize > 2**32:
         bits = 64
     sys_name = platform.system()
     sys_platform = platform.platform()
+    if 'Darwin' in sys_name and (sys_platform.find('arm') > 0 or sys_platform.find('arm64') > 0):
+        sys_name = 'DarwinARM'
     if 'Linux' in sys_name and (sys_platform.find('arm') > 0 or sys_platform.find('aarch64') > 0):
         sys_name = 'LinuxARM'
     if 'CYGWIN_NT' in sys_name: