stack-orchestrator/app/update.py

91 lines
3.5 KiB
Python

# Copyright © 2023 Vulcanize
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http:#www.gnu.org/licenses/>.
import click
import datetime
import filecmp
import os
from pathlib import Path
import requests
import sys
import stat
import shutil
import validators
from app.util import get_yaml
def _download_url(url: str, file_path: Path):
r = requests.get(url, stream=True)
r.raw.decode_content = True
with open(file_path, 'wb') as f:
shutil.copyfileobj(r.raw, f)
def _error_exit(s: str):
print(s)
sys.exit(1)
# Note at present this probably won't work on non-Unix based OSes like Windows
@click.command()
@click.option("--check-only", is_flag=True, default=False, help="only check, don't update")
@click.pass_context
def command(ctx, check_only):
'''update shiv binary from a distribution url'''
# Get the distribution URL from config
config_key = 'distribution-url'
config_file_path = Path(os.path.expanduser("~/.laconic-so/config.yml"))
if not config_file_path.exists():
_error_exit(f"Error: Config file: {config_file_path} not found")
yaml = get_yaml()
config = yaml.load(open(config_file_path, "r"))
if "distribution-url" not in config:
_error_exit(f"Error: {config_key} not defined in {config_file_path}")
distribution_url = config[config_key]
# Sanity check the URL
if not validators.url(distribution_url):
_error_exit(f"ERROR: distribution url: {distribution_url} is not valid")
# Figure out the filename for ourselves
shiv_binary_path = Path(sys.argv[0])
timestamp_filename = f"laconic-so-download-{datetime.datetime.now().strftime('%y%m%d-%H%M%S')}"
temp_download_path = shiv_binary_path.parent.joinpath(timestamp_filename)
# Download the file to a temp filename
if ctx.obj.verbose:
print(f"Downloading from: {distribution_url} to {temp_download_path}")
_download_url(distribution_url, temp_download_path)
# Set the executable bit
existing_mode = os.stat(temp_download_path)
os.chmod(temp_download_path, existing_mode.st_mode | stat.S_IXUSR)
# Switch the new file for the path we ran from
# Check if the downloaded file is identical to the existing one
same = filecmp.cmp(temp_download_path, shiv_binary_path)
if same:
if not ctx.obj.quiet or check_only:
print("No update available, latest version already installed")
else:
if not ctx.obj.quiet:
print("Update available")
if check_only:
if not ctx.obj.quiet:
print("Check-only node, update not installed")
else:
if not ctx.obj.quiet:
print("Installing...")
if ctx.obj.verbose:
print(f"Replacing: {shiv_binary_path} with {temp_download_path}")
os.replace(temp_download_path, shiv_binary_path)
if not ctx.obj.quiet:
print("Run \"laconic-so version\" to see the newly installed version")