Drone: Add version branch pipeline (#28490)

Signed-off-by: Arve Knudsen <arve.knudsen@gmail.com>

.drone.star

 load('scripts/pr.star', 'pr_pipelines')
 load('scripts/master.star', 'master_pipelines')
 load('scripts/release.star', 'release_pipelines', 'test_release_pipelines')
+load('scripts/version.star', 'version_branch_pipelines')
 
 def main(ctx):
     edition = 'oss'
     return pr_pipelines(edition=edition) + master_pipelines(edition=edition) + release_pipelines() + \
-        test_release_pipelines()
+        test_release_pipelines() + version_branch_pipelines()

scripts/lib.star

@@ -118,17 +118,17 @@ def init_steps(edition, platform, ver_mode, is_downstream=False, install_deps=Tr
             'yarn install --frozen-lockfile --no-progress',
         ])
     if edition == 'enterprise':
+        source_commit = ''
         if ver_mode == 'release':
             committish = '${DRONE_TAG}'
             source_commit = ' ${DRONE_TAG}'
         elif ver_mode == 'test-release':
             committish = 'master'
-            source_commit = ''
+        elif ver_mode == 'version-branch':
+            committish = '${DRONE_BRANCH}'
         else:
             if is_downstream:
                 source_commit = ' $${SOURCE_COMMIT}'
-            else:
-                source_commit = ''
             committish = '${DRONE_COMMIT}'
         steps = [
             identify_runner_step,
@@ -523,7 +523,7 @@ def package_step(edition, ver_mode, variants=None, is_downstream=False):
         variants_str = ' --variants {}'.format(','.join(variants))
     else:
         variants_str = ''
-    if ver_mode in ('master', 'release', 'test-release',):
+    if ver_mode in ('master', 'release', 'test-release', 'version-branch'):
         sign_args = ' --sign'
         env = {
             'GRAFANA_API_KEY': {
@@ -856,7 +856,9 @@ def get_windows_steps(edition, ver_mode, is_downstream=False):
             'commands': init_cmds,
         },
     ]
-    if (ver_mode == 'master' and (edition != 'enterprise' or is_downstream)) or ver_mode in ('release', 'test-release'):
+    if (ver_mode == 'master' and (edition != 'enterprise' or is_downstream)) or ver_mode in (
+        'release', 'test-release', 'version-branch',
+    ):
         bucket_part = ''
         bucket = 'grafana-downloads'
         if ver_mode == 'release':
@@ -883,10 +885,15 @@ def get_windows_steps(edition, ver_mode, is_downstream=False):
             'rm gcpkey.json',
             'cp C:\\App\\nssm-2.24.zip .',
             '.\\grabpl.exe windows-installer --edition {}{} {}'.format(edition, bucket_part, ver_part),
+        ]
+        if (ver_mode == 'master' and (edition != 'enterprise' or is_downstream)) or ver_mode in (
+            'release', 'test-release',
+        ):
+            installer_commands.extend([
                 '$$fname = ((Get-Childitem grafana*.msi -name) -split "`n")[0]',
                 'gsutil cp $$fname gs://{}/{}/{}/'.format(bucket, edition, dir),
                 'gsutil cp "$$fname.sha256" gs://{}/{}/{}/'.format(bucket, edition, dir),
-        ]
+            ])
         steps.append({
             'name': 'build-windows-installer',
             'image': wix_image,
@@ -906,6 +913,8 @@ def get_windows_steps(edition, ver_mode, is_downstream=False):
             committish = '${DRONE_TAG}'
         elif ver_mode == 'test-release':
             committish = 'master'
+        elif ver_mode == 'version-branch':
+            committish = '$$env:DRONE_BRANCH'
         else:
             committish = '$$env:DRONE_COMMIT'
         # For enterprise, we have to clone both OSS and enterprise and merge the latter into the former

scripts/version.star

+load(
+    'scripts/lib.star',
+    'build_image',
+    'pipeline',
+    'lint_backend_step',
+    'codespell_step',
+    'shellcheck_step',
+    'test_backend_step',
+    'test_frontend_step',
+    'build_backend_step',
+    'build_frontend_step',
+    'build_plugins_step',
+    'package_step',
+    'e2e_tests_server_step',
+    'e2e_tests_step',
+    'build_storybook_step',
+    'copy_packages_for_docker_step',
+    'build_docker_images_step',
+    'postgres_integration_tests_step',
+    'mysql_integration_tests_step',
+    'get_windows_steps',
+    'benchmark_ldap_step',
+    'ldap_service',
+    'frontend_metrics_step',
+    'upload_packages_step',
+    'notify_pipeline',
+    'integration_test_services',
+)
+
+ver_mode = 'version-branch'
+
+def get_steps(edition):
+    steps = [
+        lint_backend_step(edition),
+        codespell_step(),
+        shellcheck_step(),
+        test_backend_step(),
+        test_frontend_step(),
+        build_backend_step(edition=edition, ver_mode=ver_mode),
+        build_frontend_step(edition=edition, ver_mode=ver_mode),
+        build_plugins_step(edition=edition, sign=True),
+        package_step(edition=edition, ver_mode=ver_mode),
+        e2e_tests_server_step(),
+        e2e_tests_step(),
+        build_storybook_step(edition=edition, ver_mode=ver_mode),
+        copy_packages_for_docker_step(),
+        build_docker_images_step(edition=edition, ver_mode=ver_mode),
+        build_docker_images_step(edition=edition, ver_mode=ver_mode, ubuntu=True),
+        postgres_integration_tests_step(),
+        mysql_integration_tests_step(),
+    ]
+    windows_steps = get_windows_steps(edition=edition, ver_mode=ver_mode)
+
+    return steps, windows_steps
+
+def get_oss_pipelines(trigger):
+    services = integration_test_services()
+    steps, windows_steps = get_steps(edition='oss')
+    return [
+        pipeline(
+            name='oss-build-{}'.format(ver_mode), edition='oss', trigger=trigger, services=services, steps=steps,
+            ver_mode=ver_mode,
+        ),
+        pipeline(
+            name='oss-windows-{}'.format(ver_mode), edition='oss', trigger=trigger, steps=windows_steps,
+            platform='windows', depends_on=['oss-build-{}'.format(ver_mode)], ver_mode=ver_mode,
+        ),
+    ]
+
+def get_enterprise_pipelines(trigger):
+    services = integration_test_services()
+    steps, windows_steps = get_steps(edition='enterprise')
+    return [
+        pipeline(
+            name='enterprise-build-{}'.format(ver_mode), edition='enterprise', trigger=trigger, services=services,
+            steps=steps, ver_mode=ver_mode,
+        ),
+        pipeline(
+            name='enterprise-windows-{}'.format(ver_mode), edition='enterprise', trigger=trigger, steps=windows_steps,
+            platform='windows', depends_on=['enterprise-build-{}'.format(ver_mode)], ver_mode=ver_mode,
+        ),
+    ]
+
+def version_branch_pipelines():
+    services = integration_test_services()
+    trigger = {
+        'ref': ['refs/heads/v*',],
+    }
+
+    oss_pipelines = get_oss_pipelines(trigger=trigger)
+    enterprise_pipelines = get_enterprise_pipelines(trigger=trigger)
+
+    pipelines = oss_pipelines + enterprise_pipelines
+
+    pipelines.append(notify_pipeline(
+        name='notify-{}'.format(ver_mode), slack_channel='grafana-ci-notifications', trigger=trigger,
+        depends_on=[p['name'] for p in pipelines],
+    ))
+
+    return pipelines