Detect ccache and provide a default configuration

packages/react-native/scripts/cocoapods/utils.rb

@@ -86,6 +86,42 @@ def self.set_node_modules_user_settings(installer, react_native_path)
         end
     end
 
+    def self.set_ccache_compiler_and_linker_build_settings(installer, react_native_path, ccache_enabled)
+        projects = self.extract_projects(installer)
+
+        ccache_path = `command -v ccache`.strip
+        ccache_available = !ccache_path.empty?
+
+        message_prefix = "[Ccache]"
+
+        if ccache_available
+            Pod::UI.puts("#{message_prefix}: Ccache found at #{ccache_path}")
+        end
+
+        if ccache_available and ccache_enabled
+            Pod::UI.puts("#{message_prefix}: Setting CC, LD, CXX & LDPLUSPLUS build settings")
+            # Using scripts wrapping the ccache executable, to allow injection of configurations
+            ccache_clang_sh = File.join("$(REACT_NATIVE_PATH)", 'scripts', 'xcode', 'ccache-clang.sh')
+            ccache_clangpp_sh = File.join("$(REACT_NATIVE_PATH)", 'scripts', 'xcode', 'ccache-clang++.sh')
+
+            projects.each do |project|
+                project.build_configurations.each do |config|
+                    # Using the un-qualified names means you can swap in different implementations, for example ccache
+                    config.build_settings["CC"] = ccache_clang_sh
+                    config.build_settings["LD"] = ccache_clang_sh
+                    config.build_settings["CXX"] = ccache_clangpp_sh
+                    config.build_settings["LDPLUSPLUS"] = ccache_clangpp_sh
+                end
+
+                project.save()
+            end
+        elsif ccache_available and !ccache_enabled
+            Pod::UI.puts("#{message_prefix}: Pass ':ccache_enabled => true' to 'react_native_post_install' in your Podfile or set environment variable 'USE_CCACHE=1' to increase the speed of subsequent builds")
+        elsif !ccache_available and ccache_enabled
+            Pod::UI.warn("#{message_prefix}: Install ccache or ensure your neither passing ':ccache_enabled => true' nor setting environment variable 'USE_CCACHE=1'")
+        end
+    end
+
     def self.fix_library_search_paths(installer)
         projects = self.extract_projects(installer)
 

packages/react-native/scripts/react_native_pods.rb

@@ -259,7 +259,8 @@ def get_default_flags()
 def react_native_post_install(
   installer,
   react_native_path = "../node_modules/react-native",
-  mac_catalyst_enabled: false
+  mac_catalyst_enabled: false,
+  ccache_enabled: ENV['USE_CCACHE'] == '1'
 )
   ReactNativePodsUtils.turn_off_resource_bundle_react_core(installer)
 
@@ -276,6 +277,7 @@ def react_native_post_install(
   ReactNativePodsUtils.update_search_paths(installer)
   ReactNativePodsUtils.set_use_hermes_build_setting(installer, hermes_enabled)
   ReactNativePodsUtils.set_node_modules_user_settings(installer, react_native_path)
+  ReactNativePodsUtils.set_ccache_compiler_and_linker_build_settings(installer, react_native_path, ccache_enabled)
   ReactNativePodsUtils.apply_xcode_15_patch(installer)
   ReactNativePodsUtils.apply_ats_config(installer)
   ReactNativePodsUtils.updateOSDeploymentTarget(installer)

packages/react-native/scripts/xcode/ccache-clang++.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+# Get the absolute path of this script
+SCRIPT_DIR=$(dirname $(readlink -f "$0"))
+
+REACT_NATIVE_CCACHE_CONFIGPATH=$SCRIPT_DIR/ccache.conf
+# Provide our config file if none is already provided
+export CCACHE_CONFIGPATH="${CCACHE_CONFIGPATH:-$REACT_NATIVE_CCACHE_CONFIGPATH}"
+
+exec ccache clang++ "$@"

packages/react-native/scripts/xcode/ccache-clang.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+# Get the absolute path of this script
+SCRIPT_DIR=$(dirname $(readlink -f "$0"))
+
+REACT_NATIVE_CCACHE_CONFIGPATH=$SCRIPT_DIR/ccache.conf
+# Provide our config file if none is already provided
+export CCACHE_CONFIGPATH="${CCACHE_CONFIGPATH:-$REACT_NATIVE_CCACHE_CONFIGPATH}"
+
+exec ccache clang "$@"

packages/react-native/scripts/xcode/ccache.conf

@@ -0,0 +1,5 @@
+# See https://ccache.dev/manual/4.3.html#_configuration_options for details and available options
+sloppiness = clang_index_store,file_stat_matches,include_file_ctime,include_file_mtime,ivfsoverlay,pch_defines,modules,system_headers,time_macros
+file_clone = true
+depend_mode = true
+inode_cache = true

packages/react-native/template/ios/Podfile

@@ -33,7 +33,8 @@ target 'HelloWorld' do
     react_native_post_install(
       installer,
       config[:reactNativePath],
-      :mac_catalyst_enabled => false
+      :mac_catalyst_enabled => false,
+      # :ccache_enabled => true
     )
   end
 end