chore: get rid of "python" in flavor of rules_python

.bazelrc

@@ -3,7 +3,7 @@ build:nix --host_platform=@rules_nixpkgs_core//platforms:host
 build:nix --host_cxxopt=-std=c++14
 build:nix --cxxopt=c++14
 # bazel run @rules_bazel_integration_test//tools:update_deleted_packages
-build:nix --deleted_packages=examples/elm-binary,examples/elm-proto,examples/elm-proto/foo,examples/elm-test,examples/elm-todomvc
-query:nix --deleted_packages=examples/elm-binary,examples/elm-proto,examples/elm-proto/foo,examples/elm-test,examples/elm-todomvc
+build:nix --deleted_packages=examples/elm-binary,examples/elm-binary/nix-toolchains,examples/elm-proto,examples/elm-proto/foo,examples/elm-proto/nix-toolchains,examples/elm-test,examples/elm-test/nix-toolchains,examples/elm-todomvc,examples/elm-todomvc/nix-toolchains
+query:nix --deleted_packages=examples/elm-binary,examples/elm-binary/nix-toolchains,examples/elm-proto,examples/elm-proto/foo,examples/elm-proto/nix-toolchains,examples/elm-test,examples/elm-test/nix-toolchains,examples/elm-todomvc,examples/elm-todomvc/nix-toolchains
 
 build:ci --config=nix --test_output=all --disk_cache=~/.bazel-disk-cache

.github/workflows/release_prep.sh

@@ -51,6 +51,8 @@ load("@rules_elm//elm:dependencies.bzl", "elm_dependencies")
 elm_dependencies()
 load("@aspect_rules_js//js:repositories.bzl", "rules_js_dependencies")
 rules_js_dependencies() # rules_elm depends on rules_js
+load("@rules_python//python:repositories.bzl", "py_repositories")
+py_repositories() # rules_elm depends on rules_python
 load("@rules_elm//elm:repositories.bzl", "elm_register_toolchains")
 elm_register_toolchains()
 load("@rules_elm_npm//:repositories.bzl", elm_npm_repositories = "npm_repositories")

MODULE.bazel

@@ -11,10 +11,11 @@ bazel_dep(name = "platforms", version = "0.0.10")
 bazel_dep(name = "bazel_skylib", version = "1.7.1")
 bazel_dep(name = "aspect_bazel_lib", version = "2.7.7")
 bazel_dep(name = "rules_nodejs", version = "6.2.0")
-bazel_dep(name = "cgrindel_bazel_starlib", version = "0.20.2")
 bazel_dep(name = "rules_proto", version = "6.0.2")
 bazel_dep(name = "protobuf", version = "27.1", repo_name = "com_google_protobuf")
+bazel_dep(name = "rules_python", version = "0.35.0")
 
+bazel_dep(name = "cgrindel_bazel_starlib", version = "0.20.2", dev_dependency = True)
 bazel_dep(name = "rules_nixpkgs_core", version = "0.12.0", dev_dependency = True)
 bazel_dep(name = "rules_bazel_integration_test", version = "0.24.1", dev_dependency = True)
 

elm/defs.bzl

@@ -56,9 +56,8 @@ def _do_elm_make(
 
     ctx.actions.run(
         mnemonic = "Elm",
-        executable = "python",
+        executable = ctx.executable._compile,
         arguments = [
-            ctx.files._compile[0].path,
             compilation_mode,
             toolchain_elm_files_list[0].path,
             elm_json.path,
@@ -146,11 +145,12 @@ elm_binary = rule(
             mandatory = True,
         ),
         "_compile": attr.label(
-            allow_single_file = True,
-            default = Label("@rules_elm//elm/private:compile.py"),
+            cfg = "exec",
+            default = Label("@rules_elm//elm/private:compile"),
+            executable = True,
         ),
         "_uglifyjs": attr.label(
-            cfg = "host",
+            cfg = "exec",
             default = Label("@rules_elm//tools/uglifyjs:bin"),
             executable = True,
         ),
@@ -248,9 +248,8 @@ def _elm_test_impl(ctx):
     main_file = ctx.actions.declare_file(main_filename)
     ctx.actions.run(
         mnemonic = "ElmGenTest",
-        executable = "python",
+        executable = ctx.executable._generate_test_main,
         arguments = [
-            ctx.files._generate_test_main[0].path,
             module_name,
             tests_found_file.path,
             main_file.path,
@@ -315,20 +314,18 @@ elm_test = rule(
             mandatory = True,
         ),
         "_compile": attr.label(
-            allow_single_file = True,
-            default = Label("@rules_elm//elm/private:compile.py"),
+            executable = True,
+            cfg = "exec",
+            default = Label("@rules_elm//elm/private:compile"),
         ),
         "_generate_test_main": attr.label(
-            allow_single_file = True,
-            default = Label(
-                "@rules_elm//elm/private:generate_test_main.py",
-            ),
+            executable = True,
+            cfg = "exec",
+            default = Label("@rules_elm//elm/private:generate_test_main"),
         ),
         "_node_test_runner": attr.label(
             providers = [_ElmLibrary],
-            default = Label(
-                "@com_github_rtfeldman_node_test_runner//:node_test_runner",
-            ),
+            default = Label("@com_github_rtfeldman_node_test_runner//:node_test_runner"),
         ),
         "_tests_finder": attr.label(
             allow_single_file = True,

elm/dependencies.bzl

@@ -18,6 +18,14 @@ def elm_dependencies():
             url = "https://github.com/bazelbuild/rules_proto/releases/download/6.0.2/rules_proto-6.0.2.tar.gz",
         )
 
+    if not native.existing_rule("rules_python"):
+        http_archive(
+            name = "rules_python",
+            sha256 = "be04b635c7be4604be1ef20542e9870af3c49778ce841ee2d92fcb42f9d9516a",
+            strip_prefix = "rules_python-0.35.0",
+            url = "https://github.com/bazelbuild/rules_python/releases/download/0.35.0/rules_python-0.35.0.tar.gz",
+        )
+
     if not native.existing_rule("com_google_protobuf"):
         http_archive(
             name = "com_google_protobuf",

elm/private/BUILD.bazel

@@ -1,7 +1,20 @@
-exports_files([
-    "compile.py",
-    "generate_test_main.py",
-])
+load("@rules_python//python:defs.bzl", "py_binary")
+
+py_binary(
+    name = "compile",
+    srcs = [
+        "compile.py"
+    ],
+    visibility = ["//:__subpackages__"],
+)
+
+py_binary(
+    name = "generate_test_main",
+    srcs = [
+        "generate_test_main.py"
+    ],
+    visibility = ["//:__subpackages__"],
+)
 
 filegroup(
     name = "all_files",

examples/BUILD.bazel

@@ -24,7 +24,10 @@ rules_elm_integration_test_each_bazel(
     bazel_binaries = bazel_binaries,
     workspace_path = "elm-binary",
     bazel_cmd = "build :main",
-    expected_output = "INFO: Build completed successfully, 4 total actions",
+    expected_output = "INFO: Build completed successfully, (8|7) total actions",
+    # sometimes it fails with an error:
+    # 0.19.1/d.dat: openBinaryFile: resource busy (file is locked)
+    flaky = True,
 )
 
 rules_elm_integration_test_each_bazel(
@@ -48,9 +51,7 @@ of `List` and `Maybe` do not work without it.
 
 If you modified your elm.json by hand, try to change it back! And if you are
 having trouble getting back to a working elm.json, it may be easier to delete it
-and use `elm init` to start fresh.
-
-ERROR:""",
+and use `elm init` to start fresh.""",
 )
 
 rules_elm_integration_test_each_bazel(
@@ -59,7 +60,7 @@ rules_elm_integration_test_each_bazel(
     test_runner = ":output_match_runner",
     workspace_path = "elm-todomvc",
     bazel_cmd = "build :bin",
-    expected_output = """INFO: Build completed successfully, 4 total actions""",
+    expected_output = """INFO: Build completed successfully, (7|8) total actions""",
 )
 
 rules_elm_integration_test_each_bazel(

examples/defs.bzl

@@ -54,6 +54,7 @@ def rules_elm_integration_test_each_bazel(
     bazel_cmd,
     expected_output,
     test_runner = ":output_match_runner",
+    **kwargs,
 ):
     for config in _configs:
         for bazel_binary_name in bazel_binaries:
@@ -70,4 +71,5 @@ def rules_elm_integration_test_each_bazel(
                     # https://github.com/bazelbuild/bazel/issues/1990
                     "no-sandbox",
                 ],
+                **kwargs,
             )

examples/elm-binary/BUILD.bazel

@@ -1,18 +1,4 @@
 load("@rules_elm//elm:defs.bzl", "elm_binary")
-load("@rules_nodejs//nodejs:toolchain.bzl", "nodejs_toolchain")
-
-nodejs_toolchain(
-    name = "node_toolchain",
-    node = "@nixpkgs_nodejs//:bin/node",
-    npm = "@nixpkgs_nodejs//:bin/npm",
-)
-
-toolchain(
-    name = "nixpkgs_nodejs_toolchain",
-    exec_compatible_with = [ "@rules_nixpkgs_core//constraints:support_nix" ],
-    toolchain = ":node_toolchain",
-    toolchain_type = "@rules_nodejs//nodejs:toolchain_type",
-)
 
 elm_binary(
     name = "main",

examples/elm-binary/MODULE.bazel

@@ -8,6 +8,7 @@ local_path_override(
 
 bazel_dep(name = "rules_nixpkgs_core", version = "0.12.0", dev_dependency = True)
 bazel_dep(name = "rules_nodejs", version = "6.2.0")
+bazel_dep(name = "rules_python", version = "0.35.0")
 
 elm = use_extension("@rules_elm//elm:extensions.bzl", "elm")
 elm.repository(
@@ -56,13 +57,19 @@ nix_pkg.attr(
     attr = "nodejs",
     repo = "@nixpkgs",
 )
-
+nix_pkg.attr(
+    name = "nixpkgs_python3",
+    attr = "python3",
+    repo = "@nixpkgs",
+)
 use_repo(
     nix_pkg,
     "nixpkgs_nodejs",
+    "nixpkgs_python3",
 )
 
 register_toolchains(
-    "//:nixpkgs_nodejs_toolchain"
+    "//nix-toolchains:nixpkgs_nodejs_toolchain",
+    "//nix-toolchains:nixpkgs_python_toolchain",
 )
 

examples/elm-binary/WORKSPACE

@@ -9,6 +9,8 @@ load("@rules_elm//elm:dependencies.bzl", "elm_dependencies")
 elm_dependencies()
 load("@aspect_rules_js//js:repositories.bzl", "rules_js_dependencies")
 rules_js_dependencies()
+load("@rules_python//python:repositories.bzl", "py_repositories")
+py_repositories()
 
 _rules_nixpkgs_version = "0.12.0"
 strip_prefix = "rules_nixpkgs-%s" % _rules_nixpkgs_version
@@ -31,7 +33,15 @@ nixpkgs_package(
     attribute_path = "nodejs",
     repository = "@nixpkgs"
 )
-register_toolchains("//:nixpkgs_nodejs_toolchain")
+nixpkgs_package(
+    name = "nixpkgs_python3",
+    attribute_path = "python3",
+    repository = "@nixpkgs"
+)
+register_toolchains(
+    "//nix-toolchains:nixpkgs_nodejs_toolchain",
+    "//nix-toolchains:nixpkgs_python_toolchain",
+)
 
 load("@rules_elm//elm:repositories.bzl", "elm_register_toolchains")
 elm_register_toolchains()

examples/elm-binary/nix-toolchains/BUILD.bazel

@@ -0,0 +1,36 @@
+load("@rules_nodejs//nodejs:toolchain.bzl", "nodejs_toolchain")
+load("@rules_python//python:py_runtime.bzl", "py_runtime")
+load("@rules_python//python:py_runtime_pair.bzl", "py_runtime_pair")
+
+nodejs_toolchain(
+    name = "node_toolchain",
+    node = "@nixpkgs_nodejs//:bin/node",
+    npm = "@nixpkgs_nodejs//:bin/npm",
+)
+
+toolchain(
+    name = "nixpkgs_nodejs_toolchain",
+    exec_compatible_with = [ "@rules_nixpkgs_core//constraints:support_nix" ],
+    toolchain = ":node_toolchain",
+    toolchain_type = "@rules_nodejs//nodejs:toolchain_type",
+)
+
+py_runtime(
+    name = "my_py3_runtime",
+    interpreter = "@nixpkgs_python3//:bin/python",
+    python_version = "PY3",
+)
+
+py_runtime_pair(
+    name = "my_py_runtime_pair",
+    py3_runtime = ":my_py3_runtime",
+)
+
+toolchain(
+    name = "nixpkgs_python_toolchain",
+    exec_compatible_with = [
+        "@rules_nixpkgs_core//constraints:support_nix"
+    ],
+    toolchain = ":my_py_runtime_pair",
+    toolchain_type = "@rules_python//python:toolchain_type",
+)

examples/elm-proto/BUILD.bazel

@@ -1,67 +1,9 @@
 load("@rules_elm//proto:defs.bzl",
      "elm_proto_library",
-     "ELM_PROTO_TOOLCHAIN",
      "INCOMPATIBLE_ENABLE_PROTO_TOOLCHAIN_RESOLUTION")
-load("@rules_elm//proto:elm_proto_toolchain_rule.bzl", "elm_proto_toolchain")
 load("@rules_elm//elm:defs.bzl", "elm_test")
-load("@rules_nodejs//nodejs:toolchain.bzl", "nodejs_toolchain")
 load("@rules_proto//proto:defs.bzl", "proto_library")
-load("@rules_proto//proto/private/rules:proto_toolchain_rule.bzl", "proto_toolchain")
-
-nodejs_toolchain(
-    name = "node_toolchain",
-    node = "@nixpkgs_nodejs//:bin/node",
-    npm = "@nixpkgs_nodejs//:bin/npm",
-)
-
-toolchain(
-    name = "nixpkgs_nodejs_toolchain",
-    exec_compatible_with = [ "@rules_nixpkgs_core//constraints:support_nix" ],
-    toolchain = ":node_toolchain",
-    toolchain_type = "@rules_nodejs//nodejs:toolchain_type",
-)
-
-proto_toolchain(
-    name = "nixpkgs_protoc_toolchain",
-    proto_compiler = "@nixpkgs_protobuf//:bin/protoc",
-    visibility = ["//visibility:public"],
-)
-
-toolchain(
-    name = "nixpkgs_protobuf_toolchain",
-    toolchain_type = "@rules_proto//proto:toolchain_type",
-    exec_compatible_with = [
-        "@rules_nixpkgs_core//constraints:support_nix"
-    ],
-    toolchain = ":nixpkgs_protoc_toolchain",
-)
-
-elm_proto_deps = [
-    "@elm_package_eriktim_elm_protocol_buffers",
-    "@elm_package_anmolitor_elm_protoc_types",
-    "@elm_package_danfishgold_base64_bytes",
-    "@elm_package_elm_file",
-    "@elm_package_elm_http",
-    "@elm_package_elm_parser",
-    "@elm_package_anmolitor_elm_protoc_utils",
-    "@elm_package_rtfeldman_elm_iso8601_date_strings",
-]
-
-elm_proto_toolchain(
-    name = "elm_proto_toolchain_opt_json",
-    proto_compiler = "@nixpkgs_protobuf//:bin/protoc",
-    protoc_opts = [
-        "--elm_opt=json=decode",
-    ],
-    deps = elm_proto_deps,
-)
-
-toolchain(
-    name = "nixpkgs_elm_protobuf_toolchain",
-    toolchain_type = ELM_PROTO_TOOLCHAIN,
-    exec_compatible_with = [ "@rules_nixpkgs_core//constraints:support_nix" ],
-    toolchain = ":elm_proto_toolchain_opt_json",
-)
+load("//nix-toolchains:proto_deps.bzl", "elm_proto_deps")
 
 proto_library(
     name = "book_proto",

examples/elm-proto/MODULE.bazel

@@ -12,6 +12,7 @@ local_path_override(
 bazel_dep(name = "rules_proto", version = "6.0.2")
 bazel_dep(name = "rules_nixpkgs_core", version = "0.12.0")
 bazel_dep(name = "rules_nodejs", version = "6.2.0")
+bazel_dep(name = "rules_python", version = "0.35.0")
 bazel_dep(name = "protobuf", version = "27.1", repo_name = "com_google_protobuf")
 
 elm = use_extension("@rules_elm//elm:extensions.bzl", "elm")
@@ -156,14 +157,21 @@ nix_pkg.attr(
     attr = "protobuf",
     repo = "@nixpkgs",
 )
+nix_pkg.attr(
+    name = "nixpkgs_python3",
+    attr = "python3",
+    repo = "@nixpkgs",
+)
 use_repo(
     nix_pkg,
     "nixpkgs_nodejs",
     "nixpkgs_protobuf",
+    "nixpkgs_python3",
 )
 
 register_toolchains(
-    "//:nixpkgs_nodejs_toolchain",
-    "//:nixpkgs_elm_protobuf_toolchain",
-    "//:nixpkgs_protobuf_toolchain",
+    "//nix-toolchains:nixpkgs_nodejs_toolchain",
+    "//nix-toolchains:nixpkgs_elm_protobuf_toolchain",
+    "//nix-toolchains:nixpkgs_protobuf_toolchain",
+    "//nix-toolchains:nixpkgs_python_toolchain",
 )