#!/bin/bash
# Copyright 2018 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.

### generate a report with component exposed data

## usage: fx debug-report [f|--format <FORMAT>]
##                        [-s|--system-objects]
##                        [--] [<REGEX> [...<REGEX>]]
##
## Runs and generate a debug report from the selected components.
##
##    -f|--format <FORMAT>  What formatter to be used for the output.
##                          These will be passed on to the underlying iquery
##                          tool. Supported values:
##                          - text: Human readable output. [DEFAULT]
##                          - json: Simple to parse JSON format.
##    -s|--system-objects   Whether to include the system generated debug
##                          information. This is information includes current
##                          register and stack traces for all threads.
##                          False by default.
##
##    REGEX   Basic Regular Expression (as understood by GNU grep) to filter
##            out components. Only matching components will be included in the
##            report.

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

# Defaults.
system_objects=false
formatter=""

# Flag parsing.
while [[ "$1" =~ ^- ]]; do
  case "$1" in
    -h|--help)
      fx-command-help
      exit 0
      ;;
    -f|--format)
      shift
      formatter="$1"
      ;;
    -s|--system-objects)
      system_objects=true
      ;;
    --)
      break
      ;;
    *)
      break
  esac
  shift
done

# Post-flag processing.
format="--format=${formatter}"
host="$(get-fuchsia-device-addr)"
regexps="$@"
find_target="/hub"

# Find all the available services.
find="$(fx-command-exec "ssh" "${host}" "iquery --find ${find_target}")"

# Check if we want the system objects
if [[ "${system_objects}" = "false" ]]; then
  find="$(echo "${find}" | grep -v "system_objects$")"
fi

# Join al given regexp into a format grep can consume.
if [[ ! -z ${regexps} ]]; then
  filters=""
  for regex in ${regexps}; do
    filters="$(echo "${filters} -e ${regex}")"
  done
  find="$(echo "${find}" | grep ${filters})"
fi

# Flatten to the format iquery expects.
flatten="$(echo "${find}" | tr '\n' ' ')"

fx-command-exec "ssh" "${host}" "iquery --absolute_paths --cat ${format} --recursive ${flatten}"