Arista platform installation failure

[yxieca]

Description

Arista platform installation is failing after sonic-net/sonic-utilities#1527

Steps to reproduce the issue:

1. Install master image with the change.
2. Install another master image with the change

Describe the results you received:

Traceback (most recent call last):
  File "/usr/local/bin/sonic_installer", line 8, in <module>
    sys.exit(sonic_installer())
  File "/usr/local/lib/python3.7/dist-packages/click/core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "/usr/local/lib/python3.7/dist-packages/click/core.py", line 717, in main
    rv = self.invoke(ctx)
  File "/usr/local/lib/python3.7/dist-packages/click/core.py", line 1137, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/usr/local/lib/python3.7/dist-packages/click/core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/usr/local/lib/python3.7/dist-packages/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/usr/local/lib/python3.7/dist-packages/sonic_installer/main.py", line 437, in install
    migrate_sonic_packages(bootloader, binary_image_version)
  File "/usr/local/lib/python3.7/dist-packages/sonic_installer/main.py", line 332, in migrate_sonic_packages
    new_image_upper_dir = get_path(UPPERDIR_NAME)
  File "/usr/local/lib/python3.7/dist-packages/sonic_installer/main.py", line 329, in get_path
    return stack.enter_context(bootloader.get_path_in_image(new_image_dir, path))
  File "/usr/lib/python3.7/contextlib.py", line 426, in enter_context
    result = _cm_type.__enter__(cm)
  File "/usr/lib/python3.7/contextlib.py", line 112, in __enter__
    return next(self.gen)
  File "/usr/local/lib/python3.7/dist-packages/sonic_installer/bootloader/aboot.py", line 198, in get_path_in_image
    offset = self._get_swi_file_offset(swipath, path)
  File "/usr/local/lib/python3.7/dist-packages/sonic_installer/bootloader/aboot.py", line 186, in _get_swi_file_offset
    with zipfile.ZipFile(swipath) as swi:
  File "/usr/lib/python3.7/zipfile.py", line 1204, in __init__
    self.fp = io.open(file, filemode)
FileNotFoundError: [Errno 2] No such file or directory: '/host/image-HEAD.725-bfae15fb/sonic.swi'
admin@str-7260cx3-acs-2:~$ ls /host/image-HEAD.725-bfae15fb/
allowlist_paths.conf  docker/               .imagehash            platform/             sonic-config/         version               
boot/                 fs.squashfs           kernel-cmdline        .sonic-boot.swi       swi-signature         
admin@str-7260cx3-acs-2:~$ ls /host/image-HEAD.725-bfae15fb/.sonic-boot.swi 
/host/image-HEAD.725-bfae15fb/.sonic-boot.swi
admin@str-7260cx3-acs-2:~$ vi /usr/local/lib/python3.7/dist-packages/sonic_installer/bootloader/aboot.py

Describe the results you expected:

Install image successful.

Output of show version:

admin@str-7260cx3-acs-2:~$ show version

SONiC Software Version: SONiC.HEAD.725-bfae15fb
Distribution: Debian 10.9
Kernel: 4.19.0-12-2-amd64
Build commit: bfae15fb
Build date: Sun May  9 03:04:43 UTC 2021
Built by: johnar@jenkins-worker-22

Output of show techsupport:

Additional information you deem important (e.g. issue happens only occasionally):