From a8640758300f59617ac544dce72cb3c80a2a520d Mon Sep 17 00:00:00 2001
From: naik-sanju <sanju.naik@gojek.com>
Date: Mon, 4 Sep 2023 11:35:41 +0530
Subject: [PATCH] Add generated header maps and preserve header map paths to
 build with Bazel

This commit adds headermaps so Bazel can find where headers are located, Incase of XBS Xcode does this for us but for Bazel we need to provide headermap. We have setup example project to generate headermaps
---
 .gitignore                                    |   3 +-
 Example/.bazeliskrc                           |   1 +
 Example/.bazelrc                              |  18 ++++++++
 Example/BUILD.bazel                           |  22 +++++++++
 Example/FLEXample/Supporting Files/Info.plist |   2 +-
 Example/Gemfile                               |   1 +
 Example/Podfile                               |  10 +++-
 Example/WORKSPACE                             |  43 ++++++++++++++++++
 FLEX.podspec                                  |   1 +
 FLEX_private_hmap.hmap                        | Bin 0 -> 29044 bytes
 FLEX_public_hmap.hmap                         | Bin 0 -> 17193 bytes
 README.md                                     |   9 ++++
 12 files changed, 107 insertions(+), 3 deletions(-)
 create mode 100644 Example/.bazeliskrc
 create mode 100644 Example/.bazelrc
 create mode 100644 Example/BUILD.bazel
 create mode 100644 Example/Gemfile
 create mode 100644 Example/WORKSPACE
 create mode 100755 FLEX_private_hmap.hmap
 create mode 100755 FLEX_public_hmap.hmap

diff --git a/.gitignore b/.gitignore
index 4e0b092b1a..576b1b0e00 100644
--- a/.gitignore
+++ b/.gitignore
@@ -13,11 +13,12 @@ xcuserdata
 *.xccheckout
 *.moved-aside
 DerivedData
-*.hmap
 *.ipa
 *.xcuserstate
 .DS_Store
 /Example/Pods
 Podfile.lock
+/Example/Gemfile.lock
+/Example/bazel-*
 IDEWorkspaceChecks.plist
 *.xcworkspace
diff --git a/Example/.bazeliskrc b/Example/.bazeliskrc
new file mode 100644
index 0000000000..b486c8a509
--- /dev/null
+++ b/Example/.bazeliskrc
@@ -0,0 +1 @@
+USE_BAZEL_VERSION=5.4.1
\ No newline at end of file
diff --git a/Example/.bazelrc b/Example/.bazelrc
new file mode 100644
index 0000000000..958465a7ab
--- /dev/null
+++ b/Example/.bazelrc
@@ -0,0 +1,18 @@
+build \
+  --spawn_strategy=local \
+  --worker_sandboxing=false \
+  --features=swift.cacheable_swiftmodules \
+  --apple_platform_type=ios \
+  --verbose_failures \
+  --features=swift.use_global_module_cache \
+  --strategy=SwiftCompile=worker \
+  --experimental_guard_against_concurrent_changes \
+  --features=apple.skip_codesign_simulator_bundles \
+  --features=apple.arm64_simulator_use_device_deps \
+  --features=swift.index_while_building \
+  --features=swift.use_global_index_store \
+  --modify_execution_info=^(BitcodeSymbolsCopy|BundleApp|BundleTreeApp|DsymDwarf|DsymLipo|GenerateAppleSymbolsFile|ObjcBinarySymbolStrip|CppLink|ObjcLink|ProcessAndSign|SignBinary|SwiftArchive|SwiftStdlibCopy)$=+no-remote,^(BundleResources|ImportedDynamicFrameworkProcessor)$=+no-remote-exec \
+
+
+build:Debug \
+  --compilation_mode=dbg \
\ No newline at end of file
diff --git a/Example/BUILD.bazel b/Example/BUILD.bazel
new file mode 100644
index 0000000000..68b2bb8db6
--- /dev/null
+++ b/Example/BUILD.bazel
@@ -0,0 +1,22 @@
+load("@build_bazel_rules_apple//apple:ios.bzl", "ios_application")
+load("@build_bazel_rules_swift//swift:swift.bzl", "swift_library")
+
+
+swift_library(
+   name = "FLEXExampleSources",
+   srcs = glob(["FLEXample/App/**/*.swift"]) + ["FLEXample/AppDelegate.swift"],
+   deps = ["//Pods/FLEX"]
+)
+
+ios_application(
+    name = "FLEXExample",
+    bundle_id = "com.flipboard.flex.FLEXample",
+    families = ["iphone"],
+    infoplists = ["FLEXample/Supporting Files/Info.plist"],
+    minimum_os_version = "12.0",
+    visibility = ["//visibility:public"],
+    deps = [
+        "FLEXExampleSources",
+    ],
+
+)
\ No newline at end of file
diff --git a/Example/FLEXample/Supporting Files/Info.plist b/Example/FLEXample/Supporting Files/Info.plist
index d299e079ea..e21bfc78a2 100644
--- a/Example/FLEXample/Supporting Files/Info.plist	
+++ b/Example/FLEXample/Supporting Files/Info.plist	
@@ -41,7 +41,7 @@
 					<key>UISceneConfigurationName</key>
 					<string>Default Configuration</string>
 					<key>UISceneDelegateClassName</key>
-					<string>$(PRODUCT_MODULE_NAME).SceneDelegate</string>
+					<string>$(PRODUCT_NAME).SceneDelegate</string>
 				</dict>
 			</array>
 		</dict>
diff --git a/Example/Gemfile b/Example/Gemfile
new file mode 100644
index 0000000000..e260061675
--- /dev/null
+++ b/Example/Gemfile
@@ -0,0 +1 @@
+gem 'cocoapods-bazel'
diff --git a/Example/Podfile b/Example/Podfile
index d2316497a3..410fff9251 100644
--- a/Example/Podfile
+++ b/Example/Podfile
@@ -1,6 +1,14 @@
 platform :ios, '13.0'
 
+plugin 'cocoapods-bazel', {
+  rules: {
+    'apple_framework' => { load: '@build_bazel_rules_ios//rules:framework.bzl', rule: 'apple_framework' }.freeze,
+    'ios_application' => { load: '@build_bazel_rules_ios//rules:app.bzl', rule: 'ios_application' }.freeze,
+    'ios_unit_test' => { load: '@build_bazel_rules_ios//rules:test.bzl', rule: 'ios_unit_test' }.freeze
+  }.freeze,
+}
+
 target 'FLEXample' do
   project 'FLEXample-Cocoapods'
-  pod 'FLEX', :path => '../'
+  pod 'FLEX', :git => 'https://github.com/gojekfarm/Flex.git', :branch => 'remove-private-api-usage-and-add-header-maps', :modular_headers => true , :configurations => ['Debug']
 end
diff --git a/Example/WORKSPACE b/Example/WORKSPACE
new file mode 100644
index 0000000000..8743b47798
--- /dev/null
+++ b/Example/WORKSPACE
@@ -0,0 +1,43 @@
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
+
+git_repository(
+    name = "build_bazel_rules_ios",
+    remote = "https://github.com/bazel-ios/rules_ios.git",
+    commit = "3884a206840967cee89c4bf16202bd726c118772",
+)
+
+load(
+    "@build_bazel_rules_ios//rules:repositories.bzl",
+    "rules_ios_dependencies"
+)
+
+rules_ios_dependencies()
+
+load(
+    "@build_bazel_rules_apple//apple:repositories.bzl",
+    "apple_rules_dependencies",
+)
+
+apple_rules_dependencies()
+
+load(
+    "@build_bazel_rules_swift//swift:repositories.bzl",
+    "swift_rules_dependencies",
+)
+
+swift_rules_dependencies()
+
+load(
+    "@build_bazel_rules_swift//swift:extras.bzl",
+    "swift_rules_extra_dependencies",
+)
+
+swift_rules_extra_dependencies()
+
+load(
+    "@build_bazel_apple_support//lib:repositories.bzl",
+    "apple_support_dependencies",
+)
+
+apple_support_dependencies()
diff --git a/FLEX.podspec b/FLEX.podspec
index 6ab34cf2df..e9c962ce3c 100644
--- a/FLEX.podspec
+++ b/FLEX.podspec
@@ -40,6 +40,7 @@ Pod::Spec.new do |spec|
   spec.xcconfig = {
        'CLANG_CXX_LANGUAGE_STANDARD' => 'gnu++11',
   }
+  spec.preserve_paths = '*.hmap',
   spec.compiler_flags   = "-Wno-unsupported-availability-guard", "-Wno-deprecated-declarations"
   spec.public_header_files = [ "Classes/*.h", "Classes/Manager/*.h", "Classes/Toolbar/*.h",
                                "Classes/Core/Controllers/*.h", "Classes/Core/Views/*.h",
diff --git a/FLEX_private_hmap.hmap b/FLEX_private_hmap.hmap
new file mode 100755
index 0000000000000000000000000000000000000000..a6f55f4b57aa91e2f5eb6f58c5a3473bf0ce35f8
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diff --git a/FLEX_public_hmap.hmap b/FLEX_public_hmap.hmap
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diff --git a/README.md b/README.md
index 6cff746f58..9035498560 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,15 @@ FLEX (Flipboard Explorer) is a set of in-app debugging and exploration tools for
 <img alt="Demo" width=36% height=36% src=https://user-images.githubusercontent.com/8371943/70185687-e842c800-16af-11ea-8ef9-9e071380a462.gif>
 
 
+## How to generate headermaps?
+- Headermaps are required to build with Bazel
+- To generate a new set of headermaps, cd into Example folder
+    - Run `pod install`
+    - Comment out `xcconfig = {"CLANG_CXX_LANGUAGE_STANDARD": "gnu++11"},` this line from Pods/FLEX/BUILD.bazel file
+    - Run this command `bazel build --config=Debug --ios_multi_cpus=sim_arm64 --xcode_version=14.3.0 --verbose_failures FLEXExample` , right now the build is failing but it generates headermaps.
+    - Copy these two generated hmap files -  `bazel-out/ios-sim_arm64-min9.0-applebin_ios-ios_sim_arm64-dbg-ST-*/bin/Pods/FLEX/FLEX_private_hmap.hmap` and `bazel-out/ios-sim_arm64-min9.0-applebin_ios-ios_sim_arm64-dbg-ST-*/bin/Pods/FLEX/FLEX_public_hmap.hmap`
+    - Replace the headermap files are root with these copied headermap files. 
+- Headermap's are binary files, to inspect its content use this tool - https://github.com/milend/hmap 
 ## Give Yourself Debugging Superpowers
 - Inspect and modify views in the hierarchy.
 - See the properties and ivars on any object.