Don't package OSX's magic ._foo files

build_tools/common.sh

 # Copyright (c) 2012 The Native Client Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 #
 # Environment variable NACL_ARCH should be set to one of the following
 # values: i686 x86_64 pnacl arm
 
 
 # NAMING CONVENTION
 # =================
@@ skipping 1495 matching lines @@
   LogExecute cp "${START_DIR}/pkg_info" "${INSTALL_DIR}"
   if [ "${NACL_DEBUG}" = "1" ]; then
     echo "BUILD_CONFIG=debug" >> "${INSTALL_DIR}/pkg_info"
   else
     echo "BUILD_CONFIG=release" >> "${INSTALL_DIR}/pkg_info"
   fi
   echo "BUILD_ARCH=${NACL_ARCH}" >> "${INSTALL_DIR}/pkg_info"
   echo "BUILD_TOOLCHAIN=${TOOLCHAIN}" >> "${INSTALL_DIR}/pkg_info"
   echo "BUILD_SDK_VERSION=${NACL_SDK_VERSION}" >> "${INSTALL_DIR}/pkg_info"
   echo "BUILD_NACLPORTS_REVISION=${FULL_REVISION}" >> "${INSTALL_DIR}/pkg_info"
-  LogExecute tar cjf "${PACKAGE_FILE}" -C "${INSTALL_DIR}" .
+  if [ "${OS_NAME}" = "Darwin" ]; then
+    # OSX likes to create files starting with ._. We don't want to package
+    # these.
+    local args="--exclude ._*"
+  else
+    local args=""
+  fi
+  LogExecute tar cjf "${PACKAGE_FILE}" -C "${INSTALL_DIR}" ${args} .
 }
 
 
 ZipPublishDir() {
   # If something exists in the publish directory, zip it for download by mingn.
   if [ "${NACLPORTS_QUICKBUILD:-}" = "1" ]; then
     return
   fi
   if [ -d "${PUBLISH_DIR}" ]; then
     # Remove existing zip as it may contain only some architectures.
@@ skipping 131 matching lines @@
 # These functions are called when this script is imported to do
 # any essential checking/setup operations.
 ######################################################################
 CheckToolchain
 CheckPatchVersion
 CheckSDKVersion
 PatchSpecsFile
 InjectSystemHeaders
 InstallConfigSite
 GetRevision