We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
sonic-installer install fails in armhf
<!--
    If you are reporting a new issue, make sure that we do not have any duplicates
    already open. You can ensure this by searching the issue list for this
    repository. If there is a duplicate, please close your issue and add a comment
    to the existing issue instead.

    If you suspect your issue is a bug, please edit your issue description to
    include the BUG REPORT INFORMATION shown below. If you fail to provide this
    information within 7 days, we cannot debug your issue and will close it. We
    will, however, reopen it if you later provide the information.

    For more information about reporting issues, see
    https://github.com/Azure/SONiC/wiki#report-issues

    ---------------------------------------------------
    GENERAL SUPPORT INFORMATION
    ---------------------------------------------------

    The GitHub issue tracker is for bug reports and feature requests.
    General support can be found at the following locations:

    - SONiC Support Forums - https://groups.google.com/forum/#!forum/sonicproject

    ---------------------------------------------------
    BUG REPORT INFORMATION
    ---------------------------------------------------
    Use the commands below to provide key information from your environment:
    You do NOT have to include this information if this is a FEATURE REQUEST
-->

#### Description

<!--
     Briefly describe the problem you are having in a few paragraphs.
-->
Sonic-installer failure log using install operation.

File “/usr/local/lib/python3.9/dist-packages/click/core.py”, line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File “/usr/local/lib/python3.9/dist-packages/click/core.py”, line 555, in invoke
    return callback(*args, **kwargs)
  File “/usr/local/lib/python3.9/dist-packages/sonic_installer/main.py”, line 543, in install
    if not skip_platform_check and not bootloader.verify_image_platform(image_path):
  File “/usr/local/lib/python3.9/dist-packages/sonic_installer/bootloader/uboot.py”, line 81, in verify_image_platform
    return os.path.isfile(image_path)
NameError: name ‘os’ is not defined

## Steps to reproduce the issue
1. sonic-installer install <image>


#### Describe the results you received


#### Describe the results you expected
sonic-installer to work seamlessly.

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


#### Output of `show version`

```
# show version

SONiC Software Version: SONiC.HEAD.0-dirty-20220302.124544
Distribution: Debian 11.2
Kernel: 5.10.0-8-2-armmp
Build commit: 94b778c39
Build date: Wed Mar  2 08:25:34 UTC 2022
Built by: marvell@cpss-build1

Platform: armhf-nokia_ixs7215_52x-r0
HwSKU: Nokia-7215
ASIC: marvell
ASIC Count: 1
Serial Number: NK203110011
Model Number: 3HE16794AARA01
Hardware Revision: N/A
Uptime: 16:49:12 up 33 min,  1 user,  load average: 0.21, 0.69, 0.82

Docker images:
REPOSITORY                 TAG                            IMAGE ID       SIZE
docker-dhcp-relay          latest                         39c289f394ba   484MB
docker-teamd               HEAD.0-dirty-20220302.124544   897670943f24   483MB
docker-teamd               latest                         897670943f24   483MB
docker-syncd-mrvl          HEAD.0-dirty-20220302.124544   ded0f3c5116c   607MB
docker-syncd-mrvl          latest                         ded0f3c5116c   607MB
docker-snmp                HEAD.0-dirty-20220302.124544   50b2af07aa43   514MB
docker-snmp                latest                         50b2af07aa43   514MB
docker-sflow               HEAD.0-dirty-20220302.124544   80d19598c760   484MB
docker-sflow               latest                         80d19598c760   484MB
docker-router-advertiser   HEAD.0-dirty-20220302.124544   ff951f4fa02e   474MB
docker-router-advertiser   latest                         ff951f4fa02e   474MB
docker-platform-monitor    HEAD.0-dirty-20220302.124544   87406f9f212c   695MB
docker-platform-monitor    latest                         87406f9f212c   695MB
docker-orchagent           HEAD.0-dirty-20220302.124544   fafd5ae1c574   571MB
docker-orchagent           latest                         fafd5ae1c574   571MB
docker-nat                 HEAD.0-dirty-20220302.124544   c6a2c3a9d794   485MB
docker-nat                 latest                         c6a2c3a9d794   485MB
docker-mux                 HEAD.0-dirty-20220302.124544   e1246be5c510   492MB
docker-mux                 latest                         e1246be5c510   492MB
docker-macsec              HEAD.0-dirty-20220302.124544   87fbc786165c   485MB
docker-macsec              latest                         87fbc786165c   485MB
docker-lldp                HEAD.0-dirty-20220302.124544   498091e0d9f6   478MB
docker-lldp                latest                         498091e0d9f6   478MB
docker-fpm-frr             HEAD.0-dirty-20220302.124544   95d1d947a343   497MB
docker-fpm-frr             latest                         95d1d947a343   497MB
docker-database            HEAD.0-dirty-20220302.124544   3e5047261b1c   471MB
docker-database            latest                         3e5047261b1c   471MB

```

<!--
     Also attach debug file produced by `sudo generate_dump`
-->



--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
--- BEGIN FILES ---
Path: `sonic_installer/bootloader/uboot.py`
Content:
```
1 """
2 Bootloader implementation for uboot based platforms
3 """
4 
5 import platform
6 import subprocess
7 
8 import click
9 
10 from ..common import (
11    HOST_PATH,
12    IMAGE_DIR_PREFIX,
13    IMAGE_PREFIX,
14    run_command,
15 )
16 from .onie import OnieInstallerBootloader
17 
18 class UbootBootloader(OnieInstallerBootloader):
19 
20     NAME = 'uboot'
21 
22     def get_installed_images(self):
23         images = []
24         proc = subprocess.Popen("/usr/bin/fw_printenv -n sonic_version_1", shell=True, text=True, stdout=subprocess.PIPE)
25         (out, _) = proc.communicate()
26         image = out.rstrip()
27         if IMAGE_PREFIX in image:
28             images.append(image)
29         proc = subprocess.Popen("/usr/bin/fw_printenv -n sonic_version_2", shell=True, text=True, stdout=subprocess.PIPE)
30         (out, _) = proc.communicate()
31         image = out.rstrip()
32         if IMAGE_PREFIX in image:
33             images.append(image)
34         return images
35 
36     def get_next_image(self):
37         images = self.get_installed_images()
38         proc = subprocess.Popen("/usr/bin/fw_printenv -n boot_next", shell=True, text=True, stdout=subprocess.PIPE)
39         (out, _) = proc.communicate()
40         image = out.rstrip()
41         if "sonic_image_2" in image:
42             next_image_index = 1
43         else:
44             next_image_index = 0
45         return images[next_image_index]
46 
47     def set_default_image(self, image):
48         images = self.get_installed_images()
49         if image in images[0]:
50             run_command('/usr/bin/fw_setenv boot_next "run sonic_image_1"')
51         elif image in images[1]:
52             run_command('/usr/bin/fw_setenv boot_next "run sonic_image_2"')
53         return True
54 
55     def set_next_image(self, image):
56         images = self.get_installed_images()
57         if image in images[0]:
58             run_command('/usr/bin/fw_setenv boot_once "run sonic_image_1"')
59         elif image in images[1]:
60             run_command('/usr/bin/fw_setenv boot_once "run sonic_image_2"')
61         return True
62 
63     def install_image(self, image_path):
64         run_command("bash " + image_path)
65 
66     def remove_image(self, image):
67         click.echo('Updating next boot ...')
68         images = self.get_installed_images()
69         if image in images[0]:
70             run_command('/usr/bin/fw_setenv boot_next "run sonic_image_2"')
71             run_command('/usr/bin/fw_setenv sonic_version_1 "NONE"')
72         elif image in images[1]:
73             run_command('/usr/bin/fw_setenv boot_next "run sonic_image_1"')
74             run_command('/usr/bin/fw_setenv sonic_version_2 "NONE"')
75         image_dir = image.replace(IMAGE_PREFIX, IMAGE_DIR_PREFIX)
76         click.echo('Removing image root filesystem...')
77         subprocess.call(['rm','-rf', HOST_PATH + '/' + image_dir])
78         click.echo('Done')
79 
80     def verify_image_platform(self, image_path):
81         return os.path.isfile(image_path)
82 
83     @classmethod
84     def detect(cls):
85         arch = platform.machine()
86         return ("arm" in arch) or ("aarch64" in arch)
87
```
--- END FILES ---

Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.

Here is an example:

```diff
diff --git a/examples/server_async.py b/examples/server_async.py
--- a/examples/server_async.py
+++ b/examples/server_async.py
@@ -313,4 +313,4 @@
 
 
 if __name__ == "__main__":
-    asyncio.run(run_async_server("."), debug=True)
+    asyncio.run(run_async_server(), debug=True)
diff --git a/examples/server_sync.py b/examples/server_sync.py
--- a/examples/server_sync.py
+++ b/examples/server_sync.py
@@ -313,5 +313,5 @@
 
 
 if __name__ == "__main__":
-    server = run_sync_server(".")
+    server = run_sync_server()
     server.shutdown()

```

diff --git a/sonic_installer/bootloader/uboot.py b/sonic_installer/bootloader/uboot.py
--- a/sonic_installer/bootloader/uboot.py
+++ b/sonic_installer/bootloader/uboot.py
@@ -4,6 +4,7 @@
 
 import platform
 import subprocess
+import os
 
 import click

{"golden_diff": "diff --git a/sonic_installer/bootloader/uboot.py b/sonic_installer/bootloader/uboot.py\n--- a/sonic_installer/bootloader/uboot.py\n+++ b/sonic_installer/bootloader/uboot.py\n@@ -4,6 +4,7 @@\n \n import platform\n import subprocess\n+import os\n \n import click\n", "issue": "sonic-installer install fails in armhf\n<!--\r\n    If you are reporting a new issue, make sure that we do not have any duplicates\r\n    already open. You can ensure this by searching the issue list for this\r\n    repository. If there is a duplicate, please close your issue and add a comment\r\n    to the existing issue instead.\r\n\r\n    If you suspect your issue is a bug, please edit your issue description to\r\n    include the BUG REPORT INFORMATION shown below. If you fail to provide this\r\n    information within 7 days, we cannot debug your issue and will close it. We\r\n    will, however, reopen it if you later provide the information.\r\n\r\n    For more information about reporting issues, see\r\n    https://github.com/Azure/SONiC/wiki#report-issues\r\n\r\n    ---------------------------------------------------\r\n    GENERAL SUPPORT INFORMATION\r\n    ---------------------------------------------------\r\n\r\n    The GitHub issue tracker is for bug reports and feature requests.\r\n    General support can be found at the following locations:\r\n\r\n    - SONiC Support Forums - https://groups.google.com/forum/#!forum/sonicproject\r\n\r\n    ---------------------------------------------------\r\n    BUG REPORT INFORMATION\r\n    ---------------------------------------------------\r\n    Use the commands below to provide key information from your environment:\r\n    You do NOT have to include this information if this is a FEATURE REQUEST\r\n-->\r\n\r\n#### Description\r\n\r\n<!--\r\n     Briefly describe the problem you are having in a few paragraphs.\r\n-->\r\nSonic-installer failure log using install operation.\r\n\r\nFile \u201c/usr/local/lib/python3.9/dist-packages/click/core.py\u201d, line 956, in invoke\r\n    return ctx.invoke(self.callback, **ctx.params)\r\n  File \u201c/usr/local/lib/python3.9/dist-packages/click/core.py\u201d, line 555, in invoke\r\n    return callback(*args, **kwargs)\r\n  File \u201c/usr/local/lib/python3.9/dist-packages/sonic_installer/main.py\u201d, line 543, in install\r\n    if not skip_platform_check and not bootloader.verify_image_platform(image_path):\r\n  File \u201c/usr/local/lib/python3.9/dist-packages/sonic_installer/bootloader/uboot.py\u201d, line 81, in verify_image_platform\r\n    return os.path.isfile(image_path)\r\nNameError: name \u2018os\u2019 is not defined\r\n\r\n## Steps to reproduce the issue\r\n1. sonic-installer install <image>\r\n\r\n\r\n#### Describe the results you received\r\n\r\n\r\n#### Describe the results you expected\r\nsonic-installer to work seamlessly.\r\n\r\n#### Additional information you deem important (e.g. issue happens only occasionally)\r\n\r\n\r\n#### Output of `show version`\r\n\r\n```\r\n# show version\r\n\r\nSONiC Software Version: SONiC.HEAD.0-dirty-20220302.124544\r\nDistribution: Debian 11.2\r\nKernel: 5.10.0-8-2-armmp\r\nBuild commit: 94b778c39\r\nBuild date: Wed Mar  2 08:25:34 UTC 2022\r\nBuilt by: marvell@cpss-build1\r\n\r\nPlatform: armhf-nokia_ixs7215_52x-r0\r\nHwSKU: Nokia-7215\r\nASIC: marvell\r\nASIC Count: 1\r\nSerial Number: NK203110011\r\nModel Number: 3HE16794AARA01\r\nHardware Revision: N/A\r\nUptime: 16:49:12 up 33 min,  1 user,  load average: 0.21, 0.69, 0.82\r\n\r\nDocker images:\r\nREPOSITORY                 TAG                            IMAGE ID       SIZE\r\ndocker-dhcp-relay          latest                         39c289f394ba   484MB\r\ndocker-teamd               HEAD.0-dirty-20220302.124544   897670943f24   483MB\r\ndocker-teamd               latest                         897670943f24   483MB\r\ndocker-syncd-mrvl          HEAD.0-dirty-20220302.124544   ded0f3c5116c   607MB\r\ndocker-syncd-mrvl          latest                         ded0f3c5116c   607MB\r\ndocker-snmp                HEAD.0-dirty-20220302.124544   50b2af07aa43   514MB\r\ndocker-snmp                latest                         50b2af07aa43   514MB\r\ndocker-sflow               HEAD.0-dirty-20220302.124544   80d19598c760   484MB\r\ndocker-sflow               latest                         80d19598c760   484MB\r\ndocker-router-advertiser   HEAD.0-dirty-20220302.124544   ff951f4fa02e   474MB\r\ndocker-router-advertiser   latest                         ff951f4fa02e   474MB\r\ndocker-platform-monitor    HEAD.0-dirty-20220302.124544   87406f9f212c   695MB\r\ndocker-platform-monitor    latest                         87406f9f212c   695MB\r\ndocker-orchagent           HEAD.0-dirty-20220302.124544   fafd5ae1c574   571MB\r\ndocker-orchagent           latest                         fafd5ae1c574   571MB\r\ndocker-nat                 HEAD.0-dirty-20220302.124544   c6a2c3a9d794   485MB\r\ndocker-nat                 latest                         c6a2c3a9d794   485MB\r\ndocker-mux                 HEAD.0-dirty-20220302.124544   e1246be5c510   492MB\r\ndocker-mux                 latest                         e1246be5c510   492MB\r\ndocker-macsec              HEAD.0-dirty-20220302.124544   87fbc786165c   485MB\r\ndocker-macsec              latest                         87fbc786165c   485MB\r\ndocker-lldp                HEAD.0-dirty-20220302.124544   498091e0d9f6   478MB\r\ndocker-lldp                latest                         498091e0d9f6   478MB\r\ndocker-fpm-frr             HEAD.0-dirty-20220302.124544   95d1d947a343   497MB\r\ndocker-fpm-frr             latest                         95d1d947a343   497MB\r\ndocker-database            HEAD.0-dirty-20220302.124544   3e5047261b1c   471MB\r\ndocker-database            latest                         3e5047261b1c   471MB\r\n\r\n```\r\n\r\n<!--\r\n     Also attach debug file produced by `sudo generate_dump`\r\n-->\r\n\r\n\n", "before_files": [{"content": "\"\"\"\nBootloader implementation for uboot based platforms\n\"\"\"\n\nimport platform\nimport subprocess\n\nimport click\n\nfrom ..common import (\n   HOST_PATH,\n   IMAGE_DIR_PREFIX,\n   IMAGE_PREFIX,\n   run_command,\n)\nfrom .onie import OnieInstallerBootloader\n\nclass UbootBootloader(OnieInstallerBootloader):\n\n    NAME = 'uboot'\n\n    def get_installed_images(self):\n        images = []\n        proc = subprocess.Popen(\"/usr/bin/fw_printenv -n sonic_version_1\", shell=True, text=True, stdout=subprocess.PIPE)\n        (out, _) = proc.communicate()\n        image = out.rstrip()\n        if IMAGE_PREFIX in image:\n            images.append(image)\n        proc = subprocess.Popen(\"/usr/bin/fw_printenv -n sonic_version_2\", shell=True, text=True, stdout=subprocess.PIPE)\n        (out, _) = proc.communicate()\n        image = out.rstrip()\n        if IMAGE_PREFIX in image:\n            images.append(image)\n        return images\n\n    def get_next_image(self):\n        images = self.get_installed_images()\n        proc = subprocess.Popen(\"/usr/bin/fw_printenv -n boot_next\", shell=True, text=True, stdout=subprocess.PIPE)\n        (out, _) = proc.communicate()\n        image = out.rstrip()\n        if \"sonic_image_2\" in image:\n            next_image_index = 1\n        else:\n            next_image_index = 0\n        return images[next_image_index]\n\n    def set_default_image(self, image):\n        images = self.get_installed_images()\n        if image in images[0]:\n            run_command('/usr/bin/fw_setenv boot_next \"run sonic_image_1\"')\n        elif image in images[1]:\n            run_command('/usr/bin/fw_setenv boot_next \"run sonic_image_2\"')\n        return True\n\n    def set_next_image(self, image):\n        images = self.get_installed_images()\n        if image in images[0]:\n            run_command('/usr/bin/fw_setenv boot_once \"run sonic_image_1\"')\n        elif image in images[1]:\n            run_command('/usr/bin/fw_setenv boot_once \"run sonic_image_2\"')\n        return True\n\n    def install_image(self, image_path):\n        run_command(\"bash \" + image_path)\n\n    def remove_image(self, image):\n        click.echo('Updating next boot ...')\n        images = self.get_installed_images()\n        if image in images[0]:\n            run_command('/usr/bin/fw_setenv boot_next \"run sonic_image_2\"')\n            run_command('/usr/bin/fw_setenv sonic_version_1 \"NONE\"')\n        elif image in images[1]:\n            run_command('/usr/bin/fw_setenv boot_next \"run sonic_image_1\"')\n            run_command('/usr/bin/fw_setenv sonic_version_2 \"NONE\"')\n        image_dir = image.replace(IMAGE_PREFIX, IMAGE_DIR_PREFIX)\n        click.echo('Removing image root filesystem...')\n        subprocess.call(['rm','-rf', HOST_PATH + '/' + image_dir])\n        click.echo('Done')\n\n    def verify_image_platform(self, image_path):\n        return os.path.isfile(image_path)\n\n    @classmethod\n    def detect(cls):\n        arch = platform.machine()\n        return (\"arm\" in arch) or (\"aarch64\" in arch)\n", "path": "sonic_installer/bootloader/uboot.py"}], "after_files": [{"content": "\"\"\"\nBootloader implementation for uboot based platforms\n\"\"\"\n\nimport platform\nimport subprocess\nimport os\n\nimport click\n\nfrom ..common import (\n   HOST_PATH,\n   IMAGE_DIR_PREFIX,\n   IMAGE_PREFIX,\n   run_command,\n)\nfrom .onie import OnieInstallerBootloader\n\nclass UbootBootloader(OnieInstallerBootloader):\n\n    NAME = 'uboot'\n\n    def get_installed_images(self):\n        images = []\n        proc = subprocess.Popen(\"/usr/bin/fw_printenv -n sonic_version_1\", shell=True, text=True, stdout=subprocess.PIPE)\n        (out, _) = proc.communicate()\n        image = out.rstrip()\n        if IMAGE_PREFIX in image:\n            images.append(image)\n        proc = subprocess.Popen(\"/usr/bin/fw_printenv -n sonic_version_2\", shell=True, text=True, stdout=subprocess.PIPE)\n        (out, _) = proc.communicate()\n        image = out.rstrip()\n        if IMAGE_PREFIX in image:\n            images.append(image)\n        return images\n\n    def get_next_image(self):\n        images = self.get_installed_images()\n        proc = subprocess.Popen(\"/usr/bin/fw_printenv -n boot_next\", shell=True, text=True, stdout=subprocess.PIPE)\n        (out, _) = proc.communicate()\n        image = out.rstrip()\n        if \"sonic_image_2\" in image:\n            next_image_index = 1\n        else:\n            next_image_index = 0\n        return images[next_image_index]\n\n    def set_default_image(self, image):\n        images = self.get_installed_images()\n        if image in images[0]:\n            run_command('/usr/bin/fw_setenv boot_next \"run sonic_image_1\"')\n        elif image in images[1]:\n            run_command('/usr/bin/fw_setenv boot_next \"run sonic_image_2\"')\n        return True\n\n    def set_next_image(self, image):\n        images = self.get_installed_images()\n        if image in images[0]:\n            run_command('/usr/bin/fw_setenv boot_once \"run sonic_image_1\"')\n        elif image in images[1]:\n            run_command('/usr/bin/fw_setenv boot_once \"run sonic_image_2\"')\n        return True\n\n    def install_image(self, image_path):\n        run_command(\"bash \" + image_path)\n\n    def remove_image(self, image):\n        click.echo('Updating next boot ...')\n        images = self.get_installed_images()\n        if image in images[0]:\n            run_command('/usr/bin/fw_setenv boot_next \"run sonic_image_2\"')\n            run_command('/usr/bin/fw_setenv sonic_version_1 \"NONE\"')\n        elif image in images[1]:\n            run_command('/usr/bin/fw_setenv boot_next \"run sonic_image_1\"')\n            run_command('/usr/bin/fw_setenv sonic_version_2 \"NONE\"')\n        image_dir = image.replace(IMAGE_PREFIX, IMAGE_DIR_PREFIX)\n        click.echo('Removing image root filesystem...')\n        subprocess.call(['rm','-rf', HOST_PATH + '/' + image_dir])\n        click.echo('Done')\n\n    def verify_image_platform(self, image_path):\n        return os.path.isfile(image_path)\n\n    @classmethod\n    def detect(cls):\n        arch = platform.machine()\n        return (\"arm\" in arch) or (\"aarch64\" in arch)\n", "path": "sonic_installer/bootloader/uboot.py"}]}