[Fuchsia] Run fuchsia-gn-sdk from chromium

The latest build rules have the ffuchsia-api-level.
Need https://crrev.com/c/5586319.

Bug: fuchsia:42085580, fuchsia:327691011
Change-Id: I21383e02f9fff3db9405c0dbe42051122a325003
Reviewed-on: https://chromium-review.googlesource.com/c/crashpad/crashpad/+/5585353
Commit-Queue: Zijie He <zijiehe@google.com>
Reviewed-by: Mark Mentovai <mark@chromium.org>

.gitignore

@@ -12,31 +12,35 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# Keep sorted
+
 *.Makefile
 *.ninja
 *.pyc
 *.target.mk
 *.xcodeproj
 *~
 .*.sw?
-.cache
 .DS_Store
+.cache
 .gdb_history
 .gdbinit
 /Makefile
+/build/fuchsia
 /out
 /third_party/edo/edo
+/third_party/fuchsia-gn-sdk
 /third_party/fuchsia/.cipd
 /third_party/fuchsia/clang
 /third_party/fuchsia/qemu
 /third_party/fuchsia/sdk
 /third_party/googletest/googletest
+/third_party/gyp/gyp
 /third_party/libfuzzer
 /third_party/linux/.cipd
 /third_party/linux/clang
 /third_party/linux/sysroot
 /third_party/lss/lss
-/third_party/gyp/gyp
 /third_party/mini_chromium/mini_chromium
 /third_party/ninja/linux
 /third_party/ninja/mac*

DEPS

@@ -47,7 +47,7 @@ deps = {
       '9719c1e1e676814c456b55f5f070eabad6709d31',
   'crashpad/third_party/mini_chromium/mini_chromium':
       Var('chromium_git') + '/chromium/mini_chromium@' +
-      '5856e1ea610f6d1b47ee2e9c905498a05a1634e8',
+      'bd56f6933f2fa021a44766ced638a18f477ef1c1',
   'crashpad/third_party/libfuzzer/src':
       Var('chromium_git') + '/chromium/llvm-project/compiler-rt/lib/fuzzer.git@' +
       'fda403cf93ecb8792cb1d061564d89a6553ca020',
@@ -86,6 +86,16 @@ deps = {
     'dep_type': 'cipd',
     'condition': 'host_os == "win"',
   },
+  'crashpad/build/fuchsia': {
+     'packages': [
+       {
+        'package': 'chromium/fuchsia/test-scripts',
+        'version': 'latest',
+       }
+     ],
+     'condition': 'checkout_fuchsia',
+     'dep_type': 'cipd',
+  },
   'crashpad/third_party/linux/clang/linux-amd64': {
     'packages': [
       {
@@ -117,9 +127,14 @@ deps = {
     'dep_type': 'cipd'
   },
   'crashpad/third_party/fuchsia-gn-sdk': {
-    'url': Var('chromium_git') + '/chromium/src/third_party/fuchsia-gn-sdk.git@' +
-           '0d6902558d92fe3d49ba9a8f638ddea829be595b',
+    'packages': [
+      {
+        'package': 'chromium/fuchsia/gn-sdk',
+        'version': 'latest'
+      },
+    ],
     'condition': 'checkout_fuchsia',
+    'dep_type': 'cipd'
   },
   'crashpad/third_party/fuchsia/sdk/linux-amd64': {
     'packages': [
@@ -244,12 +259,25 @@ hooks = [
       'crashpad/build/install_linux_sysroot.py',
     ],
   },
+  {
+    # Avoid introducing unnecessary PRESUBMIT.py file from build/fuchsia.
+    # Never fail and ignore the error if the file does not exist.
+    'name': 'Remove the PRESUBMIT.py from build/fuchsia',
+    'pattern': '.',
+    'condition': 'checkout_fuchsia',
+    'action': [
+      'rm',
+      '-f',
+      'crashpad/build/fuchsia/PRESUBMIT.py',
+    ],
+  },
   {
     'name': 'Generate Fuchsia Build Definitions',
     'pattern': '.',
     'condition': 'checkout_fuchsia',
     'action': [
       'python3',
+      'crashpad/build/fuchsia_envs.py',
       'crashpad/build/fuchsia/gen_build_defs.py'
     ],
   },

build/BUILDCONFIG.gn

@@ -69,6 +69,14 @@ if (crashpad_use_libfuzzer) {
   _default_configs += [ "//build/config:crashpad_fuzzer_flags" ]
 }
 
+if (current_os == "fuchsia") {
+  _default_configs += [
+    "//third_party/fuchsia-gn-sdk/src/config:compiler",
+    "//third_party/fuchsia-gn-sdk/src/config:runtime_library",
+  ]
+  import("//third_party/fuchsia-gn-sdk/src/gn_configs.gni")
+}
+
 _default_executable_configs = _default_configs + [
                                 "$_mini_chromium_dir/build/config:executable",
                                 "$_mini_chromium_dir/build/config:win_console",

build/config/fuchsia/gn_configs.gni

@@ -0,0 +1,62 @@
+# Copyright 2024 The Crashpad Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This file is copied from
+# https://crsrc.org/c/build/config/fuchsia/gn_configs.gni?q=gn_configs.gni
+# with some local modifications to match the crashpad setup.
+
+# Path to the fuchsia SDK. This is intended for use in other templates &
+# rules to reference the contents of the fuchsia SDK.
+fuchsia_sdk = "//third_party/fuchsia/sdk/linux-amd64"
+
+# ID uniquely identifying the Fuchsia IDK build. This is exposed as a
+# property so it can be used to locate images and packages on GCS and
+# as a marker to indicate the "version" of the IDK.
+# Defaults to the id found in the manifest.json file of the SDK.
+fuchsia_sdk_id = ""
+
+# The target API level for this repository. Embedders should override this
+# value to specify the API level the packages produced from this repository
+# should be targeting, e.g. in their top-level //.gn file. A value of -1
+# means that no API level will be passed to the tools that consumes it.
+fuchsia_target_api_level = 18
+
+# The SDK manifest file. This is useful to include as a dependency
+# for some targets in order to cause a rebuild when the version of the
+# SDK is changed.
+fuchsia_sdk_manifest_file = "${fuchsia_sdk}/meta/manifest.json"
+
+# fuchsia_tool_dir is used to specify the directory in the SDK to locate
+# tools for the host cpu architecture. If the host_cpu is not recognized,
+# then tool dir defaults to x64.
+fuchsia_tool_dir = "${fuchsia_sdk}/tools/${host_cpu}"
+
+if (fuchsia_sdk_id == "") {
+  # Note: If we need to expose more than just the id in the future,
+  # we should consider exposing the entire json object for the metadata vs.
+  # adding a bunch of variables.
+  _meta = read_file(fuchsia_sdk_manifest_file, "json")
+  fuchsia_sdk_id = _meta.id
+}
+
+declare_args() {
+  # Specify a readelf_exec path to use. If not specified, the host's system
+  # executable will be used. Passed to populate_build_id_dir.py and
+  # prepare_package_inputs.py via the --readelf-exec flag.
+  # Must be a GN path (not an absolute path) since it is adjusted with
+  # rebase_path().
+  if (!defined(fuchsia_sdk_readelf_exec)) {
+    fuchsia_sdk_readelf_exec = ""
+  }
+}

build/crashpad_buildconfig.gni

@@ -83,6 +83,9 @@ if (crashpad_is_in_chromium) {
   crashpad_is_posix = mini_chromium_is_posix
 
   crashpad_is_clang = mini_chromium_is_clang
+
+  # fuchsia-gn-sdk from chromium uses "is_fuchsia" condition.
+  is_fuchsia = crashpad_is_fuchsia
 }
 
 crashpad_flock_always_supported = !(crashpad_is_android || crashpad_is_fuchsia)