Eryn Wells
2688e4e339
This group has one command so far: next-tag. It looks at the git tag list and
figured out the next deployment tag. For the most part tags are named like so:
deploy-%Y-%m-%d-NN
The middle segments are year-month-day, and the last segment is an incrementing
counter. For the most part this number will be 01. On days when I deploy more than
once, it will increment.
72 lines
2.3 KiB
Python
72 lines
2.3 KiB
Python
#!/usr/bin/env python3
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# Eryn Wells <eryn@erynwells.me>
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import argparse
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import datetime
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import subprocess
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from typing import List
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from .scripting import Command
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DATE_FORMAT = "%Y-%m-%d"
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class DeploymentCommand(Command):
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@property
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def help(self) -> str:
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return 'Deployment tools'
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def add_arguments(self, parser: argparse.ArgumentParser):
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commands = parser.add_subparsers(title="Deployment", required=True)
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deployment_command = commands.add_parser(
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'next-tag',
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help='Calculate the next deployment tag for a given date, examining all other tags for that day'
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)
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deployment_command.add_argument(
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'--date', '-d',
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type=self.__class__.parse_date_argument,
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default=datetime.date.today(),
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help="date to calculate a new deployment tag for (default: today)"
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)
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deployment_command.set_defaults(handler=self.handle_next_deployment_tag_command)
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@staticmethod
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def parse_date_argument(date_string: str) -> datetime.date:
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return datetime.datetime.strptime(date_string, DATE_FORMAT).date()
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def handle_next_deployment_tag_command(self, args: argparse.Namespace):
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next_deployment_tag = deployment_tag_for_date(args.date)
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print(next_deployment_tag)
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def deployment_tag_for_date(date: datetime.date) -> str:
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formatted_date = date.strftime(DATE_FORMAT)
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def deploy_tag_filter(tag):
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return tag.startswith("deploy-") and formatted_date in tag
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filtered_tags = sorted(filter(deploy_tag_filter, git_tags()))
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if len(filtered_tags) == 0:
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return f"deploy-{formatted_date}-01"
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else:
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last_tag = filtered_tags[-1]
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components = last_tag.split("-")
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if len(components) == 5:
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# A previous numbered deployment. Add one to the last deployment
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# number.
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deployment_number = int(components[-1]) + 1
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return f"deploy-{formatted_date}-{deployment_number:02}"
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else:
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# An old style deployment tag that doesn't have a number. There
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# should only ever be one of these.
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assert len(filtered_tags) == 1
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return f"deploy-{formatted_date}-02"
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def git_tags() -> List[str]:
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return subprocess.check_output(
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"git tag -l",
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shell=True,
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encoding="utf-8"
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).splitlines()
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