otatool, parttool: Fix permission denied error on Windows

components/app_update/otatool.py

@@ -83,10 +83,18 @@ def _get_otadata_contents(args, check=True):
         if not output:
             raise RuntimeError("No ota_data partition found")
 
-    with tempfile.NamedTemporaryFile() as otadata_file:
+    with tempfile.NamedTemporaryFile(delete=False) as f:
-        invoke_args = ["read_partition", "--output", otadata_file.name]
+        f_name = f.name
+
+    try:
+        invoke_args = ["read_partition", "--output", f_name]
         _invoke_parttool(invoke_args, args)
-        return otadata_file.read()
+        with open(f_name, "rb") as f:
+            contents = f.read()
+    finally:
+        os.unlink(f_name)
+
+    return contents
 
 
 def _get_otadata_status(otadata_contents):
@@ -130,6 +138,10 @@ def switch_otadata(args):
     sys.path.append(os.path.join(IDF_COMPONENTS_PATH, "partition_table"))
     import gen_esp32part as gen
 
+    with tempfile.NamedTemporaryFile(delete=False) as f:
+        f_name = f.name
+
+    try:
         def is_otadata_status_valid(status):
             seq = status.seq % (1 << 32)
             crc = hex(binascii.crc32(struct.pack("I", seq), 0xFFFFFFFF) % (1 << 32))
@@ -139,13 +151,11 @@ def switch_otadata(args):
 
         # In order to get the number of ota app partitions, we need the partition table
         partition_table = None
-
+        invoke_args = ["get_partition_info", "--table", f_name]
-    with tempfile.NamedTemporaryFile() as partition_table_file:
-        invoke_args = ["get_partition_info", "--table", partition_table_file.name]
 
         _invoke_parttool(invoke_args, args)
 
-        partition_table = partition_table_file.read()
+        partition_table = open(f_name, "rb").read()
         partition_table = gen.PartitionTable.from_binary(partition_table)
 
         ota_partitions = list()
@@ -221,7 +231,7 @@ def switch_otadata(args):
         ota_seq_crc_next = binascii.crc32(ota_seq_next, 0xFFFFFFFF) % (1 << 32)
         ota_seq_crc_next = struct.pack("I", ota_seq_crc_next)
 
-    with tempfile.NamedTemporaryFile() as otadata_next_file:
+        with open(f_name, "wb") as otadata_next_file:
             start = (1 if otadata_compute_base == 0 else 0) * (SPI_FLASH_SEC_SIZE >> 1)
 
             otadata_next_file.write(otadata_contents)
@@ -234,8 +244,10 @@ def switch_otadata(args):
 
             otadata_next_file.flush()
 
-        _invoke_parttool(["write_partition", "--input", otadata_next_file.name], args)
+        _invoke_parttool(["write_partition", "--input", f_name], args)
         status("Updated ota_data partition")
+    finally:
+        os.unlink(f_name)
 
 
 def _get_partition_specifier(args):

components/partition_table/parttool.py

@@ -74,11 +74,19 @@ def _get_partition_table(args):
     else:
         port_info = (" on port " + args.port if args.port else "")
         status("Reading partition table from device{}...".format(port_info))
-        with tempfile.NamedTemporaryFile() as partition_table_file:
+
-            invoke_args = ["read_flash", str(gen.offset_part_table), str(gen.MAX_PARTITION_LENGTH), partition_table_file.name]
+        f_name = None
+        with tempfile.NamedTemporaryFile(delete=False) as f:
+            f_name = f.name
+
+        try:
+            invoke_args = ["read_flash", str(gen.offset_part_table), str(gen.MAX_PARTITION_LENGTH), f_name]
             _invoke_esptool(invoke_args, args)
-            partition_table = gen.PartitionTable.from_binary(partition_table_file.read())
+            with open(f_name, "rb") as f:
+                partition_table = gen.PartitionTable.from_binary(f.read())
                 status("Partition table read from device" + port_info)
+        finally:
+            os.unlink(f_name)
 
     return partition_table