Add cli flag to disable transitions

Author: HoloRin

erlang_app_info.bzl

@@ -1,4 +1,4 @@
-load("//private:beam_transition.bzl", "beam_transition")
+load("//transitions:beam_transition.bzl", "beam_transition")
 
 ErlangAppInfo = provider(
     doc = "Compiled Erlang Application",

private/erlang_bytecode2.bzl

@@ -1,8 +1,8 @@
 load("//:erlang_app_info.bzl", "ErlangAppInfo", "flat_deps")
 load("//:util.bzl", "path_join")
-load(":beam_transition.bzl", "beam_transition")
 load(":erlang_bytecode.bzl", "unique_dirnames")
 load(":util.bzl", "erl_libs_contents")
+load("//transitions:beam_transition.bzl", "beam_transition")
 load(
     "//tools:erlang_toolchain.bzl",
     "erlang_dirs",

private/escript_archive.bzl

@@ -13,7 +13,7 @@ load(
     "path_join",
 )
 load(
-    ":beam_transition.bzl",
+    "//transitions:beam_transition.bzl",
     "beam_transition",
 )
 load(

private/escript_flat.bzl

@@ -4,7 +4,7 @@ load(
     "maybe_install_erlang",
 )
 load(
-    ":beam_transition.bzl",
+    "//transitions:beam_transition.bzl",
     "beam_transition",
 )
 

private/eunit.bzl

@@ -4,7 +4,7 @@ load(
     "path_join",
     "windows_path",
 )
-load(":beam_transition.bzl", "beam_transition")
+load("//transitions:beam_transition.bzl", "beam_transition")
 load(":util.bzl", "erl_libs_contents")
 load(
     "//tools:erlang_toolchain.bzl",

transitions/BUILD.bazel

@@ -0,0 +1,7 @@
+load("@bazel_skylib//rules:common_settings.bzl", "bool_flag")
+
+bool_flag(
+    name = "enable",
+    build_setting_default = True,
+    visibility = ["//visibility:public"],
+)

private/beam_transition.bzl renamed to transitions/beam_transition.bzl

@@ -1,9 +1,11 @@
 def _impl(settings, attr):
-    _ignore = (settings, attr)
+    _ignore = (attr)
+    if not settings["@rules_erlang//transitions:enable"]:
+        return {}
     return {"//command_line_option:cpu": "beam"}
 
 beam_transition = transition(
     implementation = _impl,
-    inputs = [],
+    inputs = ["@rules_erlang//transitions:enable"],
     outputs = ["//command_line_option:cpu"],
 )