Fix perf_setup.sh for zsh.

tools-webrtc/android/profiling/perf_setup.sh

 #!/bin/bash
 
 # Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 #
@@ skipping 14 matching lines @@
 #   resolve kernel symbols (kallsyms) as well.
 #
 # Example usage:
 #
 #   > . tools-webrtc/android/profiling/perf_setup.sh out/Release
 #   > perf_record 120
 #   > flame_graph
 #   > plot_flame_graph
 #   > perf_cleanup
 
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd -P)"
+if [ -n "$ZSH_VERSION" ]; then
+  # Running inside zsh.
+  SCRIPT_PATH="${(%):-%N}"

[henrika_webrtc, 2017/03/02 17:20:56]

I can't say how that works but I trust you :-)

+else
+  # Running inside something else (most likely bash).
+  SCRIPT_PATH="${BASH_SOURCE[0]}"
+fi
+SCRIPT_DIR="$(cd $(dirname "$SCRIPT_PATH") && pwd -P)"
 source "${SCRIPT_DIR}/utilities.sh"
 
 # Root directory for local symbol cache.
 SYMBOL_DIR="${TMPDIR:-/tmp}/android_symbols"
 # Used as a temporary folder on the Android device for data storage.
 DEV_TMP_DIR="/data/local/tmp"
 # Relative path to native shared library containing symbols.
 NATIVE_LIB_PATH="/lib.unstripped/libjingle_peerconnection_so.so"
 # Name of application package for the AppRTCMobile demo.
 APP_NAME="org.appspot.apprtc"
@@ skipping 43 matching lines @@
     return 0
   else
     return 1
   fi
 }
 
 # Copies the native shared library from the local host to the symbol cache
 # which is used by simpleperf as base when searching for symbols.
 function copy_native_shared_library_to_symbol_cache() {
   local arm_lib="arm"
-  if [ "$(native_shared_lib_arch)" == "AArch64" ]; then
+  if [[ "$(native_shared_lib_arch)" == "AArch64" ]]; then
     arm_lib="arm64"
   fi
   for num in 1 2; do
     local dir="${SYMBOL_DIR}/data/app/${APP_NAME}-${num}/lib/${arm_lib}"
     mkdir -p "${dir}"
     cp -u $(native_shared_lib_path) "${dir}"
   done
 }
 
 # Copy kernel symbols from device to symbol cache in tmp.
@@ skipping 238 matching lines @@
   # Given that envsetup is sourced, the adb tool should be accessible but
   # do one extra check just in case.
   local adb_full_path=$(which adb);
   if [[ ! -x "${adb_full_path}" ]]; then
     error "unable to find the Android Debug Bridge (adb) tool"
     return 1
   fi
   ok "adb tool is working"
 
   # Exactly one Android device must be connected.
-  if [[ ! one_device_connected ]]; then
+  if ! one_device_connected; then
     error "one device must be connected"
     return 1
   fi
   ok "one device is connected via USB"
 
   # Restart adb with root permissions if needed.
   if image_is_root && adb_has_no_root_permissions; then
     adb root
     ok "adb is running as root"
   fi
@@ skipping 85 matching lines @@
 
   cleanup
 
   return 0
 }
 
 # Only call main() if proper input parameter has been provided.
 if is_set $BUILD_DIR; then
   main "$@"
 fi