ci: Add tag service action

.github/workflows/tag-service.yml

+name: Tag Service
+
+on:
+  workflow_dispatch:
+    inputs:
+      bump:
+        description: 'How much to bump the version by'
+        required: true
+        type: choice
+        options:
+          - major
+          - minor
+          - patch
+          - prerelease
+          - finalize-prerelease
+      service:
+        description: 'Which service to release'
+        required: true
+        type: choice
+        options:
+          - op-node
+          - op-batcher
+          - op-proposer
+          - proxyd
+          - indexer
+      prerelease:
+        description: Increment major/minor/patch as prerelease?
+        required: false
+        type: boolean
+        default: false
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    environment: op-stack-production
+
+    steps:
+      - uses: actions/checkout@v2
+      - name: Fetch tags
+        run: git fetch --tags origin
+      - name: Setup Python 3.10
+        uses: actions/setup-python@v4
+        with:
+          python-version: "3.10"
+      - name: Install deps
+        run: pip install -r requirements.txt
+        working-directory: ops/tag-service
+      - run: ops/tag-service/tag-service.py --bump="$BUMP" --service="$SERVICE"
+        env:
+          INPUT_GITHUB_TOKEN: ${{ github.token }}
+          BUMP: ${{ github.event.inputs.bump }}
+          SERVICE: ${{ github.event.inputs.service }}
+        if: ${{ github.event.inputs.prerelease == 'false' }}
+      - run: ops/tag-service/tag-service.py --bump="$BUMP" --service="$SERVICE" --pre-release
+        env:
+          INPUT_GITHUB_TOKEN: ${{ github.token }}
+          BUMP: ${{ github.event.inputs.bump }}
+          SERVICE: ${{ github.event.inputs.service }}
+        if: ${{ github.event.inputs.prerelease == 'true' }}

ops/tag-service/.gitignore

+venv
\ No newline at end of file

ops/tag-service/requirements.txt

+click==8.1.3
+semver==3.0.0-dev4

ops/tag-service/tag-service.py

+#!/usr/bin/env python3
+import logging.config
+import os
+import re
+import subprocess
+import sys
+
+import click
+import semver
+
+# Minimum version numbers for packages migrating from legacy versioning.
+MIN_VERSIONS = {
+    'op-node': '0.10.14',
+    'op-batcher': '0.10.14',
+    'op-proposer': '0.10.14',
+    'proxyd': '3.16.0',
+    'indexer': '0.5.0'
+}
+
+VALID_BUMPS = ('major', 'minor', 'patch', 'prerelease', 'finalize-prerelease')
+
+MESSAGE_TEMPLATE = '[tag-service-release] Tag {service} at {version}'
+
+LOGGING_CONFIG = {
+    'version': 1,
+    'disable_existing_loggers': True,
+    'formatters': {
+        'standard': {
+            'format': '%(asctime)s [%(levelname)s]: %(message)s'
+        },
+    },
+    'handlers': {
+        'default': {
+            'level': 'INFO',
+            'formatter': 'standard',
+            'class': 'logging.StreamHandler',
+            'stream': 'ext://sys.stderr'
+        },
+    },
+    'loggers': {
+        '': {
+            'handlers': ['default'],
+            'level': 'INFO',
+            'propagate': False
+        },
+    }
+}
+
+logging.config.dictConfig(LOGGING_CONFIG)
+log = logging.getLogger(__name__)
+
+
+@click.command()
+@click.option('--bump', required=True, type=click.Choice(VALID_BUMPS))
+@click.option('--service', required=True, type=click.Choice(list(MIN_VERSIONS.keys())))
+@click.option('--pre-release/--no-pre-release', default=False)
+def tag_version(bump, service, pre_release):
+    tags = subprocess.run(['git', 'tag', '--list'], capture_output=True, check=True) \
+        .stdout.decode('utf-8').splitlines()
+
+    # Filter out tags that don't match the service name, and tags
+    # for prerelease versions.
+    version_pattern = f'^{service}/v\\d+\\.\\d+\\.\\d+(-rc\\.\\d+)?$'
+    svc_versions = [t.replace(f'{service}/v', '') for t in tags if re.match(version_pattern, t)]
+    svc_versions = sorted(svc_versions, key=lambda v: semver.Version.parse(v), reverse=True)
+
+    if pre_release and bump == 'prerelease':
+        raise Exception('Cannot use --bump=prerelease with --pre-release')
+
+    if pre_release and bump == 'finalize-prerelease':
+        raise Exception('Cannot use --bump=finalize-prerelease with --pre-release')
+
+    if len(svc_versions) == 0:
+        latest_version = MIN_VERSIONS[service]
+    else:
+        latest_version = svc_versions[0]
+
+    latest_version = semver.Version.parse(latest_version)
+
+    log.info(f'Latest version: v{latest_version}')
+
+    if bump == 'major':
+        bumped = latest_version.bump_major()
+    elif bump == 'minor':
+        bumped = latest_version.bump_minor()
+    elif bump == 'patch':
+        bumped = latest_version.bump_patch()
+    elif bump == 'prerelease':
+        bumped = latest_version.bump_prerelease()
+    elif bump == 'finalize-prerelease':
+        bumped = latest_version.finalize_version()
+    else:
+        raise Exception('Invalid bump type: {}'.format(bump))
+
+    if pre_release:
+        bumped = bumped.bump_prerelease()
+
+    new_version = 'v' + str(bumped)
+    new_tag = f'{service}/{new_version}'
+
+    log.info(f'Bumped version: {new_version}')
+
+    log.info('Configuring git')
+    # The below env vars are set by GHA.
+    gh_actor = os.environ['GITHUB_ACTOR']
+    gh_token = os.environ['INPUT_GITHUB_TOKEN']
+    gh_repo = os.environ['GITHUB_REPOSITORY']
+    origin_url = f'https://{gh_actor}:${gh_token}@github.com/{gh_repo}.git'
+    subprocess.run(['git', 'config', 'user.name', gh_actor], check=True)
+    subprocess.run(['git', 'config', 'user.email', f'{gh_actor}@users.noreply.github.com'], check=True)
+    subprocess.run(['git', 'remote', 'set-url', 'origin', origin_url], check=True)
+
+    log.info(f'Creating tag: {new_tag}')
+    subprocess.run([
+        'git',
+        'tag',
+        '-a',
+        new_tag,
+        '-m',
+        MESSAGE_TEMPLATE.format(service=service, version=new_version)
+    ], check=True)
+
+    log.info('Pushing tag to origin')
+    subprocess.run(['git', 'push', 'origin', new_tag], check=True)
+
+
+if __name__ == '__main__':
+    tag_version()