From 509820b663661723240cd7790c45007361c3233b 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 33928b89c7cb..5f8123c7b344 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 a5d03e3f1527..17319f4c35ef 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 000000000000..7d6694158a23
--- /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 2447a79e41d4..bf35b4ff77f0 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}"/