tools/devshell/ninjatrace2json

#!/bin/bash
# Copyright 2019 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

### Collect Ninja trace information for analysis in chrome://tracing

## Usage: fx ninjatrace2json
##
## Use this after a build to write "ninjatrace.json" files in the build
## directories (separately for Zircon and Fuchsia build directories).
## Then use the chrome://tracing view to load that file into your browser.

set -e

source "$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"/lib/vars.sh || exit $?
fx-config-read

for dir in "$ZIRCON_BUILDROOT" "$FUCHSIA_BUILD_DIR"; do
  "$PREBUILT_TOOLS_DIR/ninjatrace/$HOST_PLATFORM/ninjatrace" \
    -filename "$dir/.ninja_log" -trace-json "$dir/ninjatrace.json"
  echo "Now visit chrome://tracing and load $dir/ninjatrace.json"
done