From e660bd730ab62f2649090f493474331019e513ad Mon Sep 17 00:00:00 2001
From: Keith Smiley <keithbsmiley@gmail.com>
Date: Wed, 13 Apr 2022 14:29:10 -0700
Subject: [PATCH] bazel: add mobile platform mappings

As part of supporting rust in envoy and envoy mobile we have to use the
newer bazel mechanisms for changing platforms. During the transition
between the old version (which the android + iOS toolchains use) and the
new version (used by rules_rust), we have to provide some mappings for
the specific platforms. We could do this in envoy-mobile only if we'd
prefer, but since there is already some mobile specific build infra in
this repo I chose to put it here first.

Signed-off-by: Keith Smiley <keithbsmiley@gmail.com>
---
 .bazelrc                   |  1 +
 bazel/BUILD                | 75 ++++++++++++++++++++++++++++++++++++++
 bazel/platform_mappings    | 36 ++++++++++++++++++
 ci/filter_example_setup.sh |  1 +
 4 files changed, 113 insertions(+)
 create mode 100644 bazel/platform_mappings

diff --git a/.bazelrc b/.bazelrc
index 33928b89c7cbf..5f8123c7b3442 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -18,6 +18,7 @@ build --incompatible_strict_action_env
 build --host_force_python=PY3
 build --java_runtime_version=remotejdk_11
 build --tool_java_runtime_version=remotejdk_11
+build --platform_mappings=bazel/platform_mappings
 
 build --enable_platform_specific_config
 
diff --git a/bazel/BUILD b/bazel/BUILD
index a5d03e3f15271..17319f4c35ef2 100644
--- a/bazel/BUILD
+++ b/bazel/BUILD
@@ -637,3 +637,78 @@ json_data(
         load_repository_locations_spec(API_REPOSITORY_LOCATIONS_SPEC),
     ),
 )
+
+platform(
+    name = "android_aarch64",
+    constraint_values = [
+        "@platforms//cpu:aarch64",
+        "@platforms//os:android",
+    ],
+)
+
+platform(
+    name = "android_armeabi",
+    constraint_values = [
+        "@platforms//cpu:arm",  # TODO(keith): This should be armv7 https://github.com/bazelbuild/bazel/issues/14982
+        "@platforms//os:android",
+    ],
+)
+
+platform(
+    name = "android_x86",
+    constraint_values = [
+        "@platforms//cpu:x86_32",
+        "@platforms//os:android",
+    ],
+)
+
+platform(
+    name = "android_x86_64",
+    constraint_values = [
+        "@platforms//cpu:x86_64",
+        "@platforms//os:android",
+    ],
+)
+
+platform(
+    name = "macos_x86_64",
+    constraint_values = [
+        "@platforms//cpu:x86_64",
+        "@platforms//os:macos",
+    ],
+)
+
+platform(
+    name = "macos_arm64",
+    constraint_values = [
+        "@platforms//cpu:arm64",
+        "@platforms//os:macos",
+    ],
+)
+
+platform(
+    name = "ios_x86_64_platform",  # TODO(keith): Resolve duplicate name issue
+    constraint_values = [
+        "@platforms//cpu:x86_64",
+        "@platforms//os:ios",
+        "@build_bazel_apple_support//constraints:simulator",
+    ],
+)
+
+platform(
+    name = "ios_sim_arm64",
+    constraint_values = [
+        "@platforms//cpu:arm64",
+        "@platforms//os:ios",
+        "@build_bazel_apple_support//constraints:simulator",
+    ],
+)
+
+platform(
+    name = "ios_arm64_platform",  # TODO(keith): Resolve duplicate name issue
+    constraint_values = [
+        "@platforms//cpu:arm64",
+        "@platforms//os:ios",
+        "@build_bazel_apple_support//constraints:device",
+    ],
+)
diff --git a/bazel/platform_mappings b/bazel/platform_mappings
new file mode 100644
index 0000000000000..7d6694158a238
--- /dev/null
+++ b/bazel/platform_mappings
@@ -0,0 +1,36 @@
+flags:
+  --cpu=arm64-v8a
+  --crosstool_top=//external:android/crosstool
+    @envoy//bazel:android_aarch64
+
+  --cpu=armeabi-v7a
+  --crosstool_top=//external:android/crosstool
+    @envoy//bazel:android_armeabi
+
+  --cpu=x86
+  --crosstool_top=//external:android/crosstool
+    @envoy//bazel:android_x86
+
+  --cpu=x86_64
+  --crosstool_top=//external:android/crosstool
+    @envoy//bazel:android_x86_64
+
+  --cpu=darwin_x86_64
+  --apple_platform_type=macos
+    @envoy//bazel:macos_x86_64
+
+  --cpu=darwin_arm64
+  --apple_platform_type=macos
+    @envoy//bazel:macos_arm64
+
+  --cpu=ios_x86_64
+  --apple_platform_type=ios
+    @envoy//bazel:ios_x86_64_platform
+
+  --cpu=ios_sim_arm64
+  --apple_platform_type=ios
+    @envoy//bazel:ios_sim_arm64
+
+  --cpu=ios_arm64
+  --apple_platform_type=ios
+    @envoy//bazel:ios_arm64_platform
diff --git a/ci/filter_example_setup.sh b/ci/filter_example_setup.sh
index 2447a79e41d4d..bf35b4ff77f00 100644
--- a/ci/filter_example_setup.sh
+++ b/ci/filter_example_setup.sh
@@ -24,6 +24,7 @@ sed -e "s|{ENVOY_SRCDIR}|${ENVOY_SRCDIR}|" "${ENVOY_SRCDIR}"/ci/WORKSPACE.filter
 
 mkdir -p "${ENVOY_FILTER_EXAMPLE_SRCDIR}"/bazel
 ln -sf "${ENVOY_SRCDIR}"/bazel/get_workspace_status "${ENVOY_FILTER_EXAMPLE_SRCDIR}"/bazel/
+ln -sf "${ENVOY_SRCDIR}"/bazel/platform_mappings "${ENVOY_FILTER_EXAMPLE_SRCDIR}"/bazel/
 cp -f "${ENVOY_SRCDIR}"/.bazelrc "${ENVOY_FILTER_EXAMPLE_SRCDIR}"/
 rm -f "${ENVOY_FILTER_EXAMPLE_SRCDIR}"/.bazelversion
 cp -f "${ENVOY_SRCDIR}"/.bazelversion "${ENVOY_FILTER_EXAMPLE_SRCDIR}"/