chore: add Aspect Workflows CircleCI configuration

.aspect/workflows/BUILD.bazel

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+exports_files(["config.yaml"])

.aspect/workflows/deps.bzl

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+"""Bazel dependencies for Aspect Workflows"""
+
+load("@bazel_tools//tools/build_defs/repo:http.bzl", _http_archive = "http_archive", _http_file = "http_file")
+load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
+
+# TODO: move this to a rule set so repositories on Aspect Workflows can avoid this boilerplate
+rosetta_version = "5.11.0"
+rosetta_integrity = {
+    "darwin_aarch64": "sha256-zmWdxspunpc9Sz5iZOow0FotE66EGe6WFeHk5+vwMJ8=",
+    "darwin_x86_64": "sha256-5V6SxvL3QYWbBE/GuwP1ReJwpe0zkznb+j8n4V36O+E=",
+    "linux_aarch64": "sha256-qwscEgk9kdMnNZ9df+Cw8aPo1ZokIHViS6+6nCSsfSU=",
+    "linux_x86_64": "sha256-WgDaxOssma7zDHGh+iZ4p3MyBvIBk6m138ZWzR44g2Q=",
+}
+
+# https://github.com/suzuki-shunsuke/circleci-config-merge/releases
+# https://dev.to/suzukishunsuke/splitting-circleci-config-yml-10gk
+circleci_config_merge_version = "1.1.6"
+circleci_config_merge_integrity = {
+    "darwin_aarch64": "sha256-7cQeLrSVRZR+mQu/njn+x//EIb2bhTV2+J8fafRHpr4=",
+    "darwin_x86_64": "sha256-vHKDSdDaYK58MaudJ9yOPRKh+OT/LiTQV/9E07RL8qA=",
+    "linux_aarch64": "sha256-MaXVQmRK9q9LgsfM5ZzxCIIT8rUcOBbzJ8aVDgK6zWs=",
+    "linux_x86_64": "sha256-3eYJn7dShZD1oiS3cgXfqXwdDzclf/N97A2nh7ZfW+w=",
+}
+
+def http_archive(name, **kwargs):
+    maybe(_http_archive, name = name, **kwargs)
+
+def http_file(name, **kwargs):
+    maybe(_http_file, name = name, **kwargs)
+
+# buildifier: disable=function-docstring
+def fetch_workflows_deps():
+    for platform_arch in rosetta_integrity.keys():
+        http_file(
+            name = "rosetta_{}".format(platform_arch),
+            downloaded_file_path = "rosetta",
+            executable = True,
+            integrity = rosetta_integrity[platform_arch],
+            urls = ["https://static.aspect.build/aspect/{0}/rosetta_real_{1}".format(rosetta_version, platform_arch.replace("aarch64", "arm64"))],
+        )
+
+    for platform_arch in circleci_config_merge_integrity.keys():
+        http_archive(
+            name = "circleci_config_merge_{}".format(platform_arch),
+            build_file_content = "exports_files([\"circleci-config-merge\"])",
+            integrity = circleci_config_merge_integrity[platform_arch],
+            urls = ["https://github.com/suzuki-shunsuke/circleci-config-merge/releases/download/v{0}/circleci-config-merge_{0}_{1}.tar.gz".format(circleci_config_merge_version, platform_arch.replace("aarch64", "arm64").replace("x86_64", "amd64"))],
+        )

.circleci/BUILD.bazel

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+load("@aspect_bazel_lib//lib:write_source_files.bzl", "write_source_file")
+
+CIRCLECI_ORG = "aspect-build"
+
+CIRCLECI_USER_CONFIG_FILE = "//.circleci:user-config.yml"
+
+alias(
+    name = "rosetta",
+    actual = select({
+        "@bazel_tools//src/conditions:darwin_arm64": "@rosetta_darwin_aarch64//file:rosetta",
+        "@bazel_tools//src/conditions:darwin_x86_64": "@rosetta_darwin_x86_64//file:rosetta",
+        "@bazel_tools//src/conditions:linux_aarch64": "@rosetta_linux_aarch64//file:rosetta",
+        "@bazel_tools//src/conditions:linux_x86_64": "@rosetta_linux_x86_64//file:rosetta",
+    }),
+)
+
+alias(
+    name = "circleci-config-merge",
+    actual = select({
+        "@bazel_tools//src/conditions:darwin_arm64": "@circleci_config_merge_darwin_aarch64//:circleci-config-merge",
+        "@bazel_tools//src/conditions:darwin_x86_64": "@circleci_config_merge_darwin_x86_64//:circleci-config-merge",
+        "@bazel_tools//src/conditions:linux_aarch64": "@circleci_config_merge_linux_aarch64//:circleci-config-merge",
+        "@bazel_tools//src/conditions:linux_x86_64": "@circleci_config_merge_linux_x86_64//:circleci-config-merge",
+    }),
+)
+
+genrule(
+    name = "aspect_workflows_config",
+    srcs = ["//.aspect/workflows:config.yaml"],
+    outs = [":aspect-workflows-config.yml"],
+    cmd = "CI=1 CIRCLE_PROJECT_USERNAME={0} ASPECT_WORKFLOWS_DISABLE_TRACES_COLLECTION=1 $(execpath :rosetta) steps --configuration .aspect/workflows/config.yaml --host circleci > $@".format(CIRCLECI_ORG),
+    tools = [":rosetta"],
+)
+
+genrule(
+    name = "merge_config",
+    srcs = [
+        ":aspect-workflows-config.yml",
+        CIRCLECI_USER_CONFIG_FILE,
+    ],
+    outs = [":_config.yml"],
+    cmd = "echo -e '# GENERATED FILE - DO NOT EDIT!\\n# Update with: bazel run //.circleci:write_merged_config' > $@ && $(execpath :circleci-config-merge) merge $(execpath :aspect-workflows-config.yml) $(execpath {0}) >> $@".format(CIRCLECI_USER_CONFIG_FILE),
+    tools = [":circleci-config-merge"],
+)
+
+write_source_file(
+    name = "write_merged_config",
+    in_file = ":_config.yml",
+    out_file = "config.yml",
+)

.circleci/config.yml

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+# GENERATED FILE - DO NOT EDIT!
+# Update with: bazel run //.circleci:write_merged_config
+version: 2.1
+workflows:
+  aspect-workflows:
+    jobs:
+    - aw-format:
+        context: []
+        workspace: .
+    - aw-lint:
+        context: []
+        workspace: .
+    - aw-test:
+        context: []
+        workspace: .
+    when:
+      not:
+        equal:
+        - scheduled_pipeline
+        - << pipeline.trigger_source >>
+  aspect-workflows-warming:
+    jobs:
+    - aw-warming: {}
+    when:
+      and:
+      - equal:
+        - scheduled_pipeline
+        - << pipeline.trigger_source >>
+      - equal:
+        - aspect-workflows-warming
+        - << pipeline.schedule.name >>
+  user-workflow:
+    jobs:
+    - user-job
+    when:
+      and:
+      - not:
+          equal:
+          - << pipeline.trigger_source >>
+          - scheduled_pipeline
+jobs:
+  aw-format:
+    environment:
+      ASPECT_WORKFLOWS_CIRCLE_PIPELINE_NUMBER: << pipeline.number >>
+      ASPECT_WORKFLOWS_CIRCLE_PIPELINE_PROJECT_TYPE: << pipeline.project.type >>
+      ASPECT_WORKFLOWS_CIRCLE_WORKFLOW_BASE_NAME: aspect-workflows
+      ASPECT_WORKFLOWS_CONFIG: .aspect/workflows/config.yaml
+      ASPECT_WORKFLOWS_WORKSPACE: << parameters.workspace >>
+      XDG_CACHE_HOME: /mnt/ephemeral/caches
+    machine: true
+    parameters:
+      workspace:
+        type: string
+    resource_class: aspect-build/aspect-default
+    steps:
+    - run:
+        command: /etc/aspect/workflows/bin/configure_workflows_env
+        name: Workflows environment
+    - checkout
+    - run:
+        command: rm -rf /workflows/artifacts /workflows/testlogs
+        name: Prepare archive directories
+    - run:
+        command: /etc/aspect/workflows/bin/agent_health_check
+        name: Agent health check
+        no_output_timeout: 180m
+    - run:
+        command: rosetta run checkout
+        name: Checkout health
+        no_output_timeout: 180m
+    - run:
+        command: rosetta run format --workspace << parameters.workspace >>
+        name: Format
+        no_output_timeout: 180m
+    - store_artifacts:
+        path: /workflows/artifacts
+    - run:
+        command: rosetta run finalization
+        name: Finalization
+        no_output_timeout: 10m
+        when: always
+    working_directory: /mnt/ephemeral/workdir
+  aw-lint:
+    environment:
+      ASPECT_WORKFLOWS_CIRCLE_PIPELINE_NUMBER: << pipeline.number >>
+      ASPECT_WORKFLOWS_CIRCLE_PIPELINE_PROJECT_TYPE: << pipeline.project.type >>
+      ASPECT_WORKFLOWS_CIRCLE_WORKFLOW_BASE_NAME: aspect-workflows
+      ASPECT_WORKFLOWS_CONFIG: .aspect/workflows/config.yaml
+      ASPECT_WORKFLOWS_WORKSPACE: << parameters.workspace >>
+      XDG_CACHE_HOME: /mnt/ephemeral/caches
+    machine: true
+    parameters:
+      workspace:
+        type: string
+    resource_class: aspect-build/aspect-default
+    steps:
+    - run:
+        command: /etc/aspect/workflows/bin/configure_workflows_env
+        name: Workflows environment
+    - checkout
+    - run:
+        command: rm -rf /workflows/artifacts /workflows/testlogs
+        name: Prepare archive directories
+    - run:
+        command: /etc/aspect/workflows/bin/agent_health_check
+        name: Agent health check
+        no_output_timeout: 180m
+    - run:
+        command: rosetta run checkout
+        name: Checkout health
+        no_output_timeout: 180m
+    - run:
+        command: rosetta run lint --workspace << parameters.workspace >>
+        name: Lint
+        no_output_timeout: 180m
+    - store_artifacts:
+        path: /workflows/artifacts
+    - run:
+        command: rosetta run finalization
+        name: Finalization
+        no_output_timeout: 10m
+        when: always
+    working_directory: /mnt/ephemeral/workdir
+  aw-test:
+    environment:
+      ASPECT_WORKFLOWS_CIRCLE_PIPELINE_NUMBER: << pipeline.number >>
+      ASPECT_WORKFLOWS_CIRCLE_PIPELINE_PROJECT_TYPE: << pipeline.project.type >>
+      ASPECT_WORKFLOWS_CIRCLE_WORKFLOW_BASE_NAME: aspect-workflows
+      ASPECT_WORKFLOWS_CONFIG: .aspect/workflows/config.yaml
+      ASPECT_WORKFLOWS_WORKSPACE: << parameters.workspace >>
+      XDG_CACHE_HOME: /mnt/ephemeral/caches
+    machine: true
+    parameters:
+      workspace:
+        type: string
+    resource_class: aspect-build/aspect-default
+    steps:
+    - run:
+        command: /etc/aspect/workflows/bin/configure_workflows_env
+        name: Workflows environment
+    - checkout
+    - run:
+        command: rm -rf /workflows/artifacts /workflows/testlogs
+        name: Prepare archive directories
+    - run:
+        command: /etc/aspect/workflows/bin/agent_health_check
+        name: Agent health check
+        no_output_timeout: 180m
+    - run:
+        command: rosetta run checkout
+        name: Checkout health
+        no_output_timeout: 180m
+    - run:
+        command: rosetta run test --workspace << parameters.workspace >>
+        name: Test
+        no_output_timeout: 180m
+    - store_test_results:
+        path: /workflows/testlogs
+    - store_artifacts:
+        path: /workflows/testlogs
+    - store_artifacts:
+        path: /workflows/artifacts
+    - run:
+        command: rosetta run finalization
+        name: Finalization
+        no_output_timeout: 10m
+        when: always
+    working_directory: /mnt/ephemeral/workdir
+  aw-warming:
+    environment:
+      ASPECT_WORKFLOWS_CIRCLE_PIPELINE_NUMBER: << pipeline.number >>
+      ASPECT_WORKFLOWS_CIRCLE_PIPELINE_PROJECT_TYPE: << pipeline.project.type >>
+      ASPECT_WORKFLOWS_CIRCLE_WORKFLOW_BASE_NAME: aspect-workflows
+      ASPECT_WORKFLOWS_CONFIG: .aspect/workflows/config.yaml
+      XDG_CACHE_HOME: /mnt/ephemeral/caches
+    machine: true
+    resource_class: aspect-build/aspect-warming
+    steps:
+    - run:
+        command: /etc/aspect/workflows/bin/configure_workflows_env
+        name: Workflows environment
+    - checkout
+    - run:
+        command: /etc/aspect/workflows/bin/agent_health_check
+        name: Agent health check
+        no_output_timeout: 180m
+    - run:
+        command: rosetta run warming --workspace .
+        name: Create warming archive for root
+        no_output_timeout: 180m
+    - run:
+        command: /etc/aspect/workflows/bin/warming_archive
+        name: Archive warming tars
+    working_directory: /mnt/ephemeral/workdir
+  user-job:
+    docker:
+    - image: cimg/base:2023.03
+    steps:
+    - checkout
+    - run: echo "Example user CircleCI job that is not generated by Aspect Workflows."

.circleci/user-config.yml

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+# This is an example of a user CircleCI configuration that is not generated by
+# Aspect Workflows. The naming of this file is arbitrary. This configuration is
+# merged with the generated Aspect Workflows CircleCI configuration into the
+# load bearing load `.circleci/config.yaml` configuration file that is used by
+# CircleCI.
+#
+# To update `.circleci/config.yaml` after editing this file run:
+#
+#    bazel run //.circleci:write_merged_config
+#
+#
+# Aspect Workflows workflow names are all prefixed with "aspect-workflows-".
+# These currently include:
+#
+# - aspect-workflows
+# - aspect-workflows-warming
+# - aspect-workflows-manual-deliver
+#
+# Aspect Workflows job names are all prefixed with "aw-". These currently
+# include.
+#
+# - aw-auto-deliver
+# - aw-buildifier
+# - aw-configure
+# - aw-format
+# - aw-gazelle
+# - aw-manual-deliver
+# - aw-test
+# - aw-warming
+#
+# In your user CircleCI configuration, avoid workflow names prefixed with
+# `aspect-workflows-` and job names prefixed with `aw-`. Conflicting workflow or
+# job names will result in a bad configuration merge.
+version: 2.1
+jobs:
+  user-job:
+    docker:
+      - image: cimg/base:2023.03
+    steps:
+      - checkout
+      - run: echo "Example user CircleCI job that is not generated by Aspect Workflows."
+workflows:
+  user-workflow:
+    jobs:
+      - user-job
+    when:
+      and:
+        - not:
+            equal:
+              - << pipeline.trigger_source >>
+              - scheduled_pipeline

WORKSPACE.bazel

@@ -1 +1,3 @@
-# Workaround https://github.com/bazelbuild/bazel-watcher/pull/647
+load("//.aspect/workflows:deps.bzl", "fetch_workflows_deps")
+
+fetch_workflows_deps()