Add EVG Earthly tasks

Author: vector-of-bool

.evergreen/config_generator/components/earthly.py

@@ -0,0 +1,66 @@
+from shrub.v3.evg_build_variant import BuildVariant
+from shrub.v3.evg_task import EvgTaskRef
+from ..etc.utils import Task
+from shrub.v3.evg_command import subprocess_exec, EvgCommandType
+
+_ENV_PARAM_NAME = "MONGOC_EARTHLY_ENV"
+
+
+class EarthlyTask(Task):
+    def __init__(self, *, suffix: str, target: str) -> None:
+        super().__init__(
+            name=f"earthly-{suffix}",
+            commands=[
+                subprocess_exec(
+                    "bash",
+                    args=[
+                        "tools/earthly.sh",
+                        f"+{target}",
+                        f"--env=${{{_ENV_PARAM_NAME}}}",
+                    ],
+                    working_dir="mongoc",
+                    command_type=EvgCommandType.TEST,
+                )
+            ],
+            tags=[f"earthly", "pr-merge-gate"],
+            run_on=CONTAINER_RUN_DISTROS,
+        )
+
+
+#: A mapping from environment keys to the environment name.
+#: These correspond to special "*-env" targets in the Earthfile.
+ENVS = {
+    "u22": "Ubuntu 22.04",
+    "alpine3.18": "Alpine 3.18",
+    "archlinux": "Arch Linux",
+}
+
+CONTAINER_RUN_DISTROS = [
+    "ubuntu2204-small",
+    "ubuntu2204-large",
+    "ubuntu2004-small",
+    "ubuntu2004",
+    "ubuntu1804",
+    "ubuntu1804-medium",
+    "debian10",
+    "debian11",
+    "amazon2",
+]
+
+
+def tasks() -> list[Task]:
+    return [EarthlyTask(suffix="build-and-test", target="test-example")]
+
+
+def variants() -> list[BuildVariant]:
+    return [
+        BuildVariant(
+            name=f"earthly-{env_key}",
+            tasks=[EvgTaskRef(name=".earthly")],
+            display_name=env_name,
+            expansions={
+                _ENV_PARAM_NAME: env_key,
+            },
+        )
+        for env_key, env_name in ENVS.items()
+    ]

.evergreen/generated_configs/tasks.yml

@@ -1961,6 +1961,28 @@ tasks:
       - func: bootstrap-mongo-orchestration
       - func: run-mock-kms-servers
       - func: run-tests
+  - name: earthly-build-and-test
+    run_on:
+      - ubuntu2204-small
+      - ubuntu2204-large
+      - ubuntu2004-small
+      - ubuntu2004
+      - ubuntu1804
+      - ubuntu1804-medium
+      - debian10
+      - debian11
+      - amazon2
+    tags: [earthly, pr-merge-gate]
+    commands:
+      - command: subprocess.exec
+        type: test
+        params:
+          binary: bash
+          working_dir: mongoc
+          args:
+            - tools/earthly.sh
+            - +test-example
+            - --env=${MONGOC_EARTHLY_ENV}
   - name: kms-divergence-check
     commands:
       - func: kms-divergence-check

.evergreen/generated_configs/variants.yml

@@ -20,6 +20,24 @@ buildvariants:
       DEBUG: "ON"
     tasks:
       - name: .cse-matrix-winssl
+  - name: earthly-alpine3.18
+    display_name: Alpine 3.18
+    expansions:
+      MONGOC_EARTHLY_ENV: alpine3.18
+    tasks:
+      - name: .earthly
+  - name: earthly-archlinux
+    display_name: Arch Linux
+    expansions:
+      MONGOC_EARTHLY_ENV: archlinux
+    tasks:
+      - name: .earthly
+  - name: earthly-u22
+    display_name: Ubuntu 22.04
+    expansions:
+      MONGOC_EARTHLY_ENV: u22
+    tasks:
+      - name: .earthly
   - name: mock-server-test
     display_name: Mock Server Test
     expansions: