Fix unnecessary the whole project recompilation:

https://github.com/CocoaPods/CocoaPods/issues/7187

CHANGELOG.md

@@ -18,6 +18,10 @@ To install release candidates run `[sudo] gem install cocoapods --pre`
   [Dimitris Koutsogiorgas](https://github.com/dnkoutso)
   [#7193](https://github.com/CocoaPods/CocoaPods/pull/7193)
 
+* Fix unnecessary whole project recompilation with static frameworks
+  [Vladimir Gorbenko](https://github.com/volodg)
+  [#7187](https://github.com/CocoaPods/CocoaPods/issues/7187)
+
 * Prevent passing empty string to git when running `pod repo update --silent`
   [Jon Sorrells](https://github.com/jonsorrells)
   [#7176](https://github.com/CocoaPods/CocoaPods/issues/7176)

lib/cocoapods/installer/xcode/pods_project_generator/pod_target_installer.rb

@@ -467,13 +467,13 @@ module Pod
             build_phase = native_target.new_shell_script_build_phase('Setup Static Framework')
             build_phase.shell_script = <<-eos.strip_heredoc
           mkdir -p "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/Modules"
-          cp "${BUILT_PRODUCTS_DIR}/lib${PRODUCT_NAME}.a" "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/${PRODUCT_NAME}"
-          cp "${MODULEMAP_FILE}" "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/Modules/module.modulemap"
+          rsync -t "${BUILT_PRODUCTS_DIR}/lib${PRODUCT_NAME}.a" "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/${PRODUCT_NAME}"
+          rsync -t "${MODULEMAP_FILE}" "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/Modules/module.modulemap"
           # If there's a .swiftmodule, copy it into the framework's Modules folder
-          cp -r "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}".swiftmodule "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/Modules/" 2>/dev/null || :
+          rsync -tr "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}".swiftmodule "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/Modules/" 2>/dev/null || :
           # If archiving, Headers copy is needed
-          cp -r "${TARGET_BUILD_DIR}/${PRODUCT_NAME}.framework/Headers" "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/" 2>/dev/null || :
-          cp -r "${TARGET_BUILD_DIR}/${PRODUCT_NAME}.framework/PrivateHeaders" "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/" 2>/dev/null || :
+          rsync -tr "${TARGET_BUILD_DIR}/${PRODUCT_NAME}.framework/Headers" "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/" 2>/dev/null || :
+          rsync -tr "${TARGET_BUILD_DIR}/${PRODUCT_NAME}.framework/PrivateHeaders" "${BUILT_PRODUCTS_DIR}/${PRODUCT_NAME}.framework/" 2>/dev/null || :
             eos
           end