1 files changed, 114 insertions, 0 deletions
diff --git a/third_party/libwebrtc/tools_webrtc/iwyu/apply-iwyu b/third_party/libwebrtc/tools_webrtc/iwyu/apply-iwyu
new file mode 100755
index 0000000000..794756ba47
--- /dev/null
+++ b/third_party/libwebrtc/tools_webrtc/iwyu/apply-iwyu
@@ -0,0 +1,114 @@
+#!/bin/sh
+#
+# Run the include-what-you-use tool (iwyu) on a file in the webrtc source
+# directory.
+#
+# The script uses a subsequent grep pass to remove #include files
+# that are problematic to include.
+#
+# In order to handle include paths correctly, you need to provide
+# a compile DB (aka compile_commands.json).
+# You can create it in one of the following ways:
+# "gn gen --export-compile-commands path/to/out"
+# "tools/clang/scripts/generate_compdb.py -p path/to/out > compile_commands.json"
+# If "out/Default" exists, the script will attempt to generate it for you.
+#
+# To get iwyu on Debian/glinux, do "sudo apt-get install iwyu".
+
+# Set this to 1 to get more debug information.
+# Set this to 2 to also get a dump of the iwyu tool output.
+DEBUG=0
+
+set -e
+if [ $DEBUG -gt 0 ]; then
+  set -x
+fi
+
+IWYU_TOOL="${IWYU_TOOL:-/usr/bin/iwyu_tool}"
+FIX_INCLUDE="${FIX_INCLUDE:-/usr/bin/fix_include}"
+FIX_INCLUDE_ARGS=''
+IWYU_TOOL_DIR="${IWYU_TOOL_DIR:-tools_webrtc/iwyu}"
+COMPILE_COMMANDS=''
+
+error() {
+  echo "$*" >&2
+  exit 1
+}
+
+usage() {
+  echo "Usage: $0 [ -c compile-commands-file.json ] [-r] file.cc"
+  echo "Runs the IWYU and fix-include on a CC file and its associated .h file"
+  echo "Arguments:"
+  echo " -c compile-commands: Compiler command file"
+  echo " -r : Remove non-required includes from .h file"
+  echo " -h : Print this help message"
+  echo "(default command file: out/Default/compile_commands.json - this"
+  echo "will be generated if not present"
+}
+
+while getopts 'c:rh' opts; do
+  case "${opts}" in
+    c) COMPILE_COMMANDS="${OPTARG}" ;;
+    r) FIX_INCLUDE_ARGS="${FIX_INCLUDE_ARGS} --nosafe_headers" ;;
+    h) usage; exit 1 ;;
+    *) error "Unexpected option ${opts}" ;;
+  esac
+done
+shift $(expr $OPTIND - 1 )
+
+if [[ -z "$COMPILE_COMMANDS" ]]; then
+  if [ -d "out/Default" ]; then
+    if [ ! -f "out/Default/compile_commands.json" ]; then
+      gn gen --export-compile-commands out/Default
+    fi
+    COMPILE_COMMANDS="out/Default/compile_commands.json"
+  else
+    error "compile_commands.json must be passed."
+  fi
+fi
+
+FILE="$1"
+
+if [ ! -f $FILE_CC ]; then
+  error "File $FILE is not found"
+fi
+
+# Find the .h file that IWYU will modify, if any.
+FILE_CC=$FILE
+if [ -f $(dirname $FILE)/$(basename -s .cc $FILE).h ]; then
+  FILE_H=$(dirname $FILE)/$(basename -s .cc $FILE).h
+else
+  FILE_H=""
+fi
+
+# IWYU has a confusing set of exit codes. Discard it.
+"$IWYU_TOOL" -p "$COMPILE_COMMANDS" "$FILE_CC" -- -Xiwyu --no_fwd_decls \
+  -Xiwyu --mapping_file=../../$IWYU_TOOL_DIR/mappings.imp \
+  >& /tmp/includefixes$$ || echo "IWYU done, code $?"
+
+if grep 'fatal error' /tmp/includefixes$$; then
+  echo "iwyu run failed"
+  cat /tmp/includefixes$$
+  rm /tmp/includefixes$$
+  exit 1
+else
+  if [ $DEBUG -gt 1 ]; then
+    cat /tmp/includefixes$$
+  fi
+  # In compile_commands.json, the file name is recorded
+  # as a relative path to the build directory.
+  pushd "$(dirname "$COMPILE_COMMANDS")" || error "pushd failed"
+  "$FIX_INCLUDE" $FIX_INCLUDE_ARGS < /tmp/includefixes$$ || echo "Some files modified"
+  popd
+  rm /tmp/includefixes$$
+fi
+
+grep -v -f tools_webrtc/iwyu/iwyu-filter-list $FILE_CC > $FILE_CC.new
+mv $FILE_CC.new $FILE_CC
+
+if [ -n "$FILE_H" ]; then
+  grep -v -f tools_webrtc/iwyu/iwyu-filter-list $FILE_H > $FILE_H.new
+  mv $FILE_H.new $FILE_H
+fi
+
+echo "Finished. Check diff, compile and git cl format before uploading."