selfprivacy-rest-api/selfprivacy_api/migrations/migrate_to_selfprivacy_channel.py

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import os
import subprocess
from selfprivacy_api.migrations.migration import Migration
class MigrateToSelfprivacyChannel(Migration):
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"""Migrate to selfprivacy Nix channel."""
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def get_migration_name(self):
return "migrate_to_selfprivacy_channel"
def get_migration_description(self):
return "Migrate to selfprivacy Nix channel."
def is_migration_needed(self):
try:
output = subprocess.check_output(
["nix-channel", "--list"], start_new_session=True
)
output = output.decode("utf-8")
first_line = output.split("\n", maxsplit=1)[0]
return first_line.startswith("nixos") and (
first_line.endswith("nixos-21.11") or first_line.endswith("nixos-21.05")
)
except subprocess.CalledProcessError:
return False
def migrate(self):
# Change the channel and update them.
# Also, go to /etc/nixos directory and make a git pull
current_working_directory = os.getcwd()
try:
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print("Changing channel")
os.chdir("/etc/nixos")
subprocess.check_output(
[
"nix-channel",
"--add",
"https://channel.selfprivacy.org/nixos-selfpricacy",
"nixos",
]
)
subprocess.check_output(["nix-channel", "--update"])
subprocess.check_output(["git", "pull"])
os.chdir(current_working_directory)
except subprocess.CalledProcessError:
os.chdir(current_working_directory)
print("Error")