Graduate the Dockerfile linter Hadolint from experimental status.

[ci skip-rust]

build-support/bin/generate_docs.py

@@ -204,8 +204,8 @@ def run_pants_help_all() -> dict[str, Any]:
         "pants.backend.awslambda.python",
         "pants.backend.codegen.protobuf.python",
         "pants.backend.docker",
+        "pants.backend.docker.lint.hadolint",
         "pants.backend.experimental.codegen.thrift.apache.python",
-        "pants.backend.experimental.docker.lint.hadolint",
         "pants.backend.experimental.go",
         "pants.backend.experimental.java",
         "pants.backend.experimental.java.lint.google_java_format",

pants.toml

@@ -16,7 +16,7 @@ backend_packages.add = [
   "pants.backend.shell.lint.shellcheck",
   "pants.backend.shell.lint.shfmt",
   "pants.backend.docker",
-  "pants.backend.experimental.docker.lint.hadolint",
+  "pants.backend.docker.lint.hadolint",
   "pants.backend.experimental.go",
   "pants.backend.experimental.java",
   "pants.backend.experimental.java.lint.google_java_format",

src/python/pants/backend/docker/lint/hadolint/register.py

@@ -0,0 +1,14 @@
+# Copyright 2022 Pants project contributors (see CONTRIBUTORS.md).
+# Licensed under the Apache License, Version 2.0 (see LICENSE).
+
+from pants.backend.docker.lint.hadolint import skip_field
+from pants.backend.docker.lint.hadolint.rules import rules as hadolint_rules
+from pants.backend.docker.rules import rules as docker_rules
+
+
+def rules():
+    return (
+        *docker_rules(),
+        *hadolint_rules(),
+        *skip_field.rules(),
+    )

src/python/pants/backend/experimental/docker/lint/hadolint/register.py

@@ -1,14 +1,16 @@
 # Copyright 2021 Pants project contributors (see CONTRIBUTORS.md).
 # Licensed under the Apache License, Version 2.0 (see LICENSE).
 
-from pants.backend.docker.lint.hadolint import skip_field
-from pants.backend.docker.lint.hadolint.rules import rules as hadolint_rules
-from pants.backend.docker.rules import rules as docker_rules
+from pants.backend.docker.lint.hadolint import register
+from pants.base.deprecated import deprecated
 
 
+@deprecated(
+    "2.11.0.dev0",
+    (
+        "The `pants.backend.experimental.docker.lint.hadolint` backend has graduated. Use "
+        "`pants.backend.docker.lint.hadolint` instead."
+    ),
+)
 def rules():
-    return (
-        *docker_rules(),
-        *hadolint_rules(),
-        *skip_field.rules(),
-    )
+    return register.rules()

src/python/pants/init/BUILD

@@ -3,13 +3,14 @@
 
 python_sources(dependencies=[":plugins"])
 
-# NOTE: When adding a new backend, add it `generate_docs.py` too! (If stable enough for docs)
+# NOTE: When adding a new backend, add it to `generate_docs.py` too! (If stable enough for docs)
 target(
     name="plugins",
     dependencies=[
         "src/python/pants/backend/awslambda/python",
         "src/python/pants/backend/codegen/protobuf/python",
         "src/python/pants/backend/docker",
+        "src/python/pants/backend/docker/lint/hadolint",
         "src/python/pants/backend/experimental/codegen/avro/java",
         "src/python/pants/backend/experimental/codegen/protobuf/java",
         "src/python/pants/backend/experimental/codegen/protobuf/scala",