593 lines
		
	
	
		
			19 KiB
		
	
	
	
		
			Python
		
	
	
		
			Executable File
		
	
			
		
		
	
	
			593 lines
		
	
	
		
			19 KiB
		
	
	
	
		
			Python
		
	
	
		
			Executable File
		
	
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# Copyright 2020 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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#     http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""An interactive script for doing a release. See `cli()` below.
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"""
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import glob
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import os
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import re
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import subprocess
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import sys
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import urllib.request
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from os import path
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from tempfile import TemporaryDirectory
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from typing import List, Optional, Tuple
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import attr
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import click
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import commonmark
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import git
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import redbaron
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from click.exceptions import ClickException
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from github import Github
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from packaging import version
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def run_until_successful(command, *args, **kwargs):
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    while True:
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        completed_process = subprocess.run(command, *args, **kwargs)
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        exit_code = completed_process.returncode
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        if exit_code == 0:
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            # successful, so nothing more to do here.
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            return completed_process
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        print(f"The command {command!r} failed with exit code {exit_code}.")
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        print("Please try to correct the failure and then re-run.")
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        click.confirm("Try again?", abort=True)
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@click.group()
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def cli():
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    """An interactive script to walk through the parts of creating a release.
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    Requires the dev dependencies be installed, which can be done via:
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        pip install -e .[dev]
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    Then to use:
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        ./scripts-dev/release.py prepare
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        # ... ask others to look at the changelog ...
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        ./scripts-dev/release.py tag
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        # ... wait for assets to build ...
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        ./scripts-dev/release.py publish
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        ./scripts-dev/release.py upload
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        # Optional: generate some nice links for the announcement
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        ./scripts-dev/release.py upload
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    If the env var GH_TOKEN (or GITHUB_TOKEN) is set, or passed into the
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    `tag`/`publish` command, then a new draft release will be created/published.
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    """
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@cli.command()
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def prepare():
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    """Do the initial stages of creating a release, including creating release
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    branch, updating changelog and pushing to GitHub.
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    """
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    # Make sure we're in a git repo.
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    try:
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        repo = git.Repo()
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    except git.InvalidGitRepositoryError:
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        raise click.ClickException("Not in Synapse repo.")
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    if repo.is_dirty():
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        raise click.ClickException("Uncommitted changes exist.")
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    click.secho("Updating git repo...")
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    repo.remote().fetch()
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    # Get the current version and AST from root Synapse module.
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    current_version, parsed_synapse_ast, version_node = parse_version_from_module()
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    # Figure out what sort of release we're doing and calcuate the new version.
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    rc = click.confirm("RC", default=True)
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    if current_version.pre:
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        # If the current version is an RC we don't need to bump any of the
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        # version numbers (other than the RC number).
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        if rc:
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            new_version = "{}.{}.{}rc{}".format(
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                current_version.major,
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                current_version.minor,
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                current_version.micro,
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                current_version.pre[1] + 1,
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            )
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        else:
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            new_version = "{}.{}.{}".format(
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                current_version.major,
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                current_version.minor,
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                current_version.micro,
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            )
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    else:
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        # If this is a new release cycle then we need to know if it's a minor
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        # or a patch version bump.
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        release_type = click.prompt(
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            "Release type",
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            type=click.Choice(("minor", "patch")),
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            show_choices=True,
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            default="minor",
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        )
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        if release_type == "minor":
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            if rc:
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                new_version = "{}.{}.{}rc1".format(
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                    current_version.major,
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                    current_version.minor + 1,
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                    0,
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                )
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            else:
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                new_version = "{}.{}.{}".format(
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                    current_version.major,
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                    current_version.minor + 1,
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                    0,
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                )
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        else:
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            if rc:
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                new_version = "{}.{}.{}rc1".format(
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                    current_version.major,
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                    current_version.minor,
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                    current_version.micro + 1,
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                )
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            else:
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                new_version = "{}.{}.{}".format(
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                    current_version.major,
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                    current_version.minor,
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                    current_version.micro + 1,
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                )
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    # Confirm the calculated version is OK.
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    if not click.confirm(f"Create new version: {new_version}?", default=True):
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        click.get_current_context().abort()
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    # Switch to the release branch.
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    parsed_new_version = version.parse(new_version)
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    # We assume for debian changelogs that we only do RCs or full releases.
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    assert not parsed_new_version.is_devrelease
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    assert not parsed_new_version.is_postrelease
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    release_branch_name = (
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        f"release-v{parsed_new_version.major}.{parsed_new_version.minor}"
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    )
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    release_branch = find_ref(repo, release_branch_name)
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    if release_branch:
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        if release_branch.is_remote():
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            # If the release branch only exists on the remote we check it out
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            # locally.
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            repo.git.checkout(release_branch_name)
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            release_branch = repo.active_branch
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    else:
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        # If a branch doesn't exist we create one. We ask which one branch it
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        # should be based off, defaulting to sensible values depending on the
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        # release type.
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        if current_version.is_prerelease:
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            default = release_branch_name
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        elif release_type == "minor":
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            default = "develop"
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        else:
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            default = "master"
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        branch_name = click.prompt(
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            "Which branch should the release be based on?", default=default
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        )
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        base_branch = find_ref(repo, branch_name)
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        if not base_branch:
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            print(f"Could not find base branch {branch_name}!")
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            click.get_current_context().abort()
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        # Check out the base branch and ensure it's up to date
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        repo.head.reference = base_branch
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        repo.head.reset(index=True, working_tree=True)
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        if not base_branch.is_remote():
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            update_branch(repo)
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        # Create the new release branch
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        release_branch = repo.create_head(release_branch_name, commit=base_branch)
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    # Switch to the release branch and ensure its up to date.
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    repo.git.checkout(release_branch_name)
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    update_branch(repo)
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    # Update the `__version__` variable and write it back to the file.
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    version_node.value = '"' + new_version + '"'
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    with open("synapse/__init__.py", "w") as f:
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        f.write(parsed_synapse_ast.dumps())
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    # Generate changelogs.
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    generate_and_write_changelog(current_version)
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    # Generate debian changelogs
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    if parsed_new_version.pre is not None:
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        # If this is an RC then we need to coerce the version string to match
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        # Debian norms, e.g. 1.39.0rc2 gets converted to 1.39.0~rc2.
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        base_ver = parsed_new_version.base_version
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        pre_type, pre_num = parsed_new_version.pre
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        debian_version = f"{base_ver}~{pre_type}{pre_num}"
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    else:
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        debian_version = new_version
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    run_until_successful(
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        f'dch -M -v {debian_version} "New synapse release {debian_version}."',
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        shell=True,
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    )
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    run_until_successful('dch -M -r -D stable ""', shell=True)
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    # Show the user the changes and ask if they want to edit the change log.
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    repo.git.add("-u")
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    subprocess.run("git diff --cached", shell=True)
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    if click.confirm("Edit changelog?", default=False):
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        click.edit(filename="CHANGES.md")
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    # Commit the changes.
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    repo.git.add("-u")
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    repo.git.commit("-m", new_version)
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    # We give the option to bail here in case the user wants to make sure things
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    # are OK before pushing.
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    if not click.confirm("Push branch to github?", default=True):
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        print("")
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        print("Run when ready to push:")
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        print("")
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        print(f"\tgit push -u {repo.remote().name} {repo.active_branch.name}")
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        print("")
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        sys.exit(0)
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    # Otherwise, push and open the changelog in the browser.
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    repo.git.push("-u", repo.remote().name, repo.active_branch.name)
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    print("Opening the changelog in your browser...")
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    print("Please ask others to give it a check.")
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    click.launch(
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        f"https://github.com/matrix-org/synapse/blob/{repo.active_branch.name}/CHANGES.md"
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    )
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@cli.command()
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@click.option("--gh-token", envvar=["GH_TOKEN", "GITHUB_TOKEN"])
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def tag(gh_token: Optional[str]):
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    """Tags the release and generates a draft GitHub release"""
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    # Make sure we're in a git repo.
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    try:
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        repo = git.Repo()
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    except git.InvalidGitRepositoryError:
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        raise click.ClickException("Not in Synapse repo.")
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    if repo.is_dirty():
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        raise click.ClickException("Uncommitted changes exist.")
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    click.secho("Updating git repo...")
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    repo.remote().fetch()
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    # Find out the version and tag name.
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    current_version, _, _ = parse_version_from_module()
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    tag_name = f"v{current_version}"
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    # Check we haven't released this version.
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    if tag_name in repo.tags:
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        raise click.ClickException(f"Tag {tag_name} already exists!\n")
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    # Get the appropriate changelogs and tag.
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    changes = get_changes_for_version(current_version)
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    click.echo_via_pager(changes)
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    if click.confirm("Edit text?", default=False):
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        changes = click.edit(changes, require_save=False)
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    repo.create_tag(tag_name, message=changes, sign=True)
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    if not click.confirm("Push tag to GitHub?", default=True):
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        print("")
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        print("Run when ready to push:")
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        print("")
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        print(f"\tgit push {repo.remote().name} tag {current_version}")
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        print("")
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        return
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    repo.git.push(repo.remote().name, "tag", tag_name)
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    # If no token was given, we bail here
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    if not gh_token:
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        print("Launching the GitHub release page in your browser.")
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        print("Please correct the title and create a draft.")
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        if current_version.is_prerelease:
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            print("As this is an RC, remember to mark it as a pre-release!")
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        print("(by the way, this step can be automated by passing --gh-token,")
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        print("or one of the GH_TOKEN or GITHUB_TOKEN env vars.)")
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        click.launch(f"https://github.com/matrix-org/synapse/releases/edit/{tag_name}")
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        print("Once done, you need to wait for the release assets to build.")
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        if click.confirm("Launch the release assets actions page?", default=True):
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            click.launch(
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                f"https://github.com/matrix-org/synapse/actions?query=branch%3A{tag_name}"
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            )
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        return
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    # Create a new draft release
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    gh = Github(gh_token)
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    gh_repo = gh.get_repo("matrix-org/synapse")
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    release = gh_repo.create_git_release(
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        tag=tag_name,
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        name=tag_name,
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        message=changes,
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        draft=True,
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        prerelease=current_version.is_prerelease,
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    )
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    # Open the release and the actions where we are building the assets.
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    print("Launching the release page and the actions page.")
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    click.launch(release.html_url)
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    click.launch(
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        f"https://github.com/matrix-org/synapse/actions?query=branch%3A{tag_name}"
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    )
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    click.echo("Wait for release assets to be built")
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@cli.command()
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@click.option("--gh-token", envvar=["GH_TOKEN", "GITHUB_TOKEN"], required=True)
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def publish(gh_token: str):
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    """Publish release."""
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    # Make sure we're in a git repo.
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    try:
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        repo = git.Repo()
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    except git.InvalidGitRepositoryError:
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        raise click.ClickException("Not in Synapse repo.")
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    if repo.is_dirty():
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        raise click.ClickException("Uncommitted changes exist.")
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    current_version, _, _ = parse_version_from_module()
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    tag_name = f"v{current_version}"
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    if not click.confirm(f"Publish {tag_name}?", default=True):
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        return
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    # Publish the draft release
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    gh = Github(gh_token)
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    gh_repo = gh.get_repo("matrix-org/synapse")
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    for release in gh_repo.get_releases():
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        if release.title == tag_name:
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            break
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    else:
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        raise ClickException(f"Failed to find GitHub release for {tag_name}")
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    assert release.title == tag_name
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    if not release.draft:
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        click.echo("Release already published.")
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        return
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    release = release.update_release(
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        name=release.title,
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        message=release.body,
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        tag_name=release.tag_name,
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        prerelease=release.prerelease,
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        draft=False,
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    )
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@cli.command()
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def upload():
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    """Upload release to pypi."""
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    current_version, _, _ = parse_version_from_module()
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    tag_name = f"v{current_version}"
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    pypi_asset_names = [
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        f"matrix_synapse-{current_version}-py3-none-any.whl",
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        f"matrix-synapse-{current_version}.tar.gz",
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    ]
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    with TemporaryDirectory(prefix=f"synapse_upload_{tag_name}_") as tmpdir:
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        for name in pypi_asset_names:
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            filename = path.join(tmpdir, name)
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            url = f"https://github.com/matrix-org/synapse/releases/download/{tag_name}/{name}"
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            click.echo(f"Downloading {name} into {filename}")
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            urllib.request.urlretrieve(url, filename=filename)
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        if click.confirm("Upload to PyPI?", default=True):
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            subprocess.run("twine upload *", shell=True, cwd=tmpdir)
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    click.echo(
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        f"Done! Remember to merge the tag {tag_name} into the appropriate branches"
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    )
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@cli.command()
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def announce():
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    """Generate markdown to announce the release."""
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    current_version, _, _ = parse_version_from_module()
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    tag_name = f"v{current_version}"
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    click.echo(
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        f"""
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Hi everyone. Synapse {current_version} has just been released.
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[notes](https://github.com/matrix-org/synapse/releases/tag/{tag_name}) |\
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[docker](https://hub.docker.com/r/matrixdotorg/synapse/tags?name={tag_name}) | \
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[debs](https://packages.matrix.org/debian/) | \
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[pypi](https://pypi.org/project/matrix-synapse/{current_version}/)"""
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    )
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    if "rc" in tag_name:
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        click.echo(
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            """
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Announce the RC in
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- #homeowners:matrix.org (Synapse Announcements)
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- #synapse-dev:matrix.org"""
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        )
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    else:
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        click.echo(
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            """
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Announce the release in
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						|
- #homeowners:matrix.org (Synapse Announcements), bumping the version in the topic
 | 
						|
- #synapse:matrix.org (Synapse Admins), bumping the version in the topic
 | 
						|
- #synapse-dev:matrix.org
 | 
						|
- #synapse-package-maintainers:matrix.org"""
 | 
						|
        )
 | 
						|
 | 
						|
 | 
						|
def parse_version_from_module() -> Tuple[
 | 
						|
    version.Version, redbaron.RedBaron, redbaron.Node
 | 
						|
]:
 | 
						|
    # Parse the AST and load the `__version__` node so that we can edit it
 | 
						|
    # later.
 | 
						|
    with open("synapse/__init__.py") as f:
 | 
						|
        red = redbaron.RedBaron(f.read())
 | 
						|
 | 
						|
    version_node = None
 | 
						|
    for node in red:
 | 
						|
        if node.type != "assignment":
 | 
						|
            continue
 | 
						|
 | 
						|
        if node.target.type != "name":
 | 
						|
            continue
 | 
						|
 | 
						|
        if node.target.value != "__version__":
 | 
						|
            continue
 | 
						|
 | 
						|
        version_node = node
 | 
						|
        break
 | 
						|
 | 
						|
    if not version_node:
 | 
						|
        print("Failed to find '__version__' definition in synapse/__init__.py")
 | 
						|
        sys.exit(1)
 | 
						|
 | 
						|
    # Parse the current version.
 | 
						|
    current_version = version.parse(version_node.value.value.strip('"'))
 | 
						|
    assert isinstance(current_version, version.Version)
 | 
						|
 | 
						|
    return current_version, red, version_node
 | 
						|
 | 
						|
 | 
						|
def find_ref(repo: git.Repo, ref_name: str) -> Optional[git.HEAD]:
 | 
						|
    """Find the branch/ref, looking first locally then in the remote."""
 | 
						|
    if ref_name in repo.refs:
 | 
						|
        return repo.refs[ref_name]
 | 
						|
    elif ref_name in repo.remote().refs:
 | 
						|
        return repo.remote().refs[ref_name]
 | 
						|
    else:
 | 
						|
        return None
 | 
						|
 | 
						|
 | 
						|
def update_branch(repo: git.Repo):
 | 
						|
    """Ensure branch is up to date if it has a remote"""
 | 
						|
    if repo.active_branch.tracking_branch():
 | 
						|
        repo.git.merge(repo.active_branch.tracking_branch().name)
 | 
						|
 | 
						|
 | 
						|
def get_changes_for_version(wanted_version: version.Version) -> str:
 | 
						|
    """Get the changelogs for the given version.
 | 
						|
 | 
						|
    If an RC then will only get the changelog for that RC version, otherwise if
 | 
						|
    its a full release will get the changelog for the release and all its RCs.
 | 
						|
    """
 | 
						|
 | 
						|
    with open("CHANGES.md") as f:
 | 
						|
        changes = f.read()
 | 
						|
 | 
						|
    # First we parse the changelog so that we can split it into sections based
 | 
						|
    # on the release headings.
 | 
						|
    ast = commonmark.Parser().parse(changes)
 | 
						|
 | 
						|
    @attr.s(auto_attribs=True)
 | 
						|
    class VersionSection:
 | 
						|
        title: str
 | 
						|
 | 
						|
        # These are 0-based.
 | 
						|
        start_line: int
 | 
						|
        end_line: Optional[int] = None  # Is none if its the last entry
 | 
						|
 | 
						|
    headings: List[VersionSection] = []
 | 
						|
    for node, _ in ast.walker():
 | 
						|
        # We look for all text nodes that are in a level 1 heading.
 | 
						|
        if node.t != "text":
 | 
						|
            continue
 | 
						|
 | 
						|
        if node.parent.t != "heading" or node.parent.level != 1:
 | 
						|
            continue
 | 
						|
 | 
						|
        # If we have a previous heading then we update its `end_line`.
 | 
						|
        if headings:
 | 
						|
            headings[-1].end_line = node.parent.sourcepos[0][0] - 1
 | 
						|
 | 
						|
        headings.append(VersionSection(node.literal, node.parent.sourcepos[0][0] - 1))
 | 
						|
 | 
						|
    changes_by_line = changes.split("\n")
 | 
						|
 | 
						|
    version_changelog = []  # The lines we want to include in the changelog
 | 
						|
 | 
						|
    # Go through each section and find any that match the requested version.
 | 
						|
    regex = re.compile(r"^Synapse v?(\S+)")
 | 
						|
    for section in headings:
 | 
						|
        groups = regex.match(section.title)
 | 
						|
        if not groups:
 | 
						|
            continue
 | 
						|
 | 
						|
        heading_version = version.parse(groups.group(1))
 | 
						|
        heading_base_version = version.parse(heading_version.base_version)
 | 
						|
 | 
						|
        # Check if heading version matches the requested version, or if its an
 | 
						|
        # RC of the requested version.
 | 
						|
        if wanted_version not in (heading_version, heading_base_version):
 | 
						|
            continue
 | 
						|
 | 
						|
        version_changelog.extend(changes_by_line[section.start_line : section.end_line])
 | 
						|
 | 
						|
    return "\n".join(version_changelog)
 | 
						|
 | 
						|
 | 
						|
def generate_and_write_changelog(current_version: version.Version):
 | 
						|
    # We do this by getting a draft so that we can edit it before writing to the
 | 
						|
    # changelog.
 | 
						|
    result = run_until_successful(
 | 
						|
        "python3 -m towncrier --draft", shell=True, capture_output=True
 | 
						|
    )
 | 
						|
    new_changes = result.stdout.decode("utf-8")
 | 
						|
    new_changes = new_changes.replace(
 | 
						|
        "No significant changes.", f"No significant changes since {current_version}."
 | 
						|
    )
 | 
						|
 | 
						|
    # Prepend changes to changelog
 | 
						|
    with open("CHANGES.md", "r+") as f:
 | 
						|
        existing_content = f.read()
 | 
						|
        f.seek(0, 0)
 | 
						|
        f.write(new_changes)
 | 
						|
        f.write("\n")
 | 
						|
        f.write(existing_content)
 | 
						|
 | 
						|
    # Remove all the news fragments
 | 
						|
    for f in glob.iglob("changelog.d/*.*"):
 | 
						|
        os.remove(f)
 | 
						|
 | 
						|
 | 
						|
if __name__ == "__main__":
 | 
						|
    cli()
 |