generate-full-compile-commands.sh

#!/bin/bash

THIS_PATH=$(dirname $0)

if [ "$1" = "--update-root" ]; then
  update_root=true
  shift
fi

if [ -z "$*" ]; then
  targets=$THIS_PATH/_BUILD/*/compile_commands.json $THIS_PATH/*/compile_commands.json
else
  for i in $*; do
    targets+="$THIS_PATH/_BUILD/$i $THIS_PATH/$i "
  done
fi

function count_files()
{
  grep "\"file\"" -c $1 2> /dev/null || echo 0
}

function print_stats()
{
  echo "$1 has $(count_files $1) files"
}

function update_commands()
{
  path=$1
  shift
  extra_paths=$*

  print_stats $path/compile_commands.json

  for p in $path $extra_paths; do
    update_paths+="-p $p "
  done

  compdb $update_paths list -1 > $path/compile_commands_full.json
  compdb_ret=$?

  if [ $compdb_ret == 0 ] && [ -f $path/compile_commands_full.json ]; then
    if [ $(count_files $path/compile_commands_full.json) -gt 0 ]; then
      mv -v $path/compile_commands_full.json $path/compile_commands.json

      for p in $path $extra_paths; do
        touch $p/compile_commands_headers.stamp
      done
    else
      rm -f $path/compile_commands_full.json
      rm -f $path/compile_commands_headers.stamp
    fi
  fi

  print_stats $path/compile_commands.json

  exit $compdb_ret
}

subpaths=""

for i in $targets; do
  if [ -d $i ]; then
    path=$i
  else
    path=$(dirname $i)
  fi

  if [ ! -f $path/compile_commands.json ]; then
    continue
  fi

  if [ -z "$update_root" ]; then
    update_commands $path
    echo ""
  fi

  subpaths+="$path "
done

if [ -z "$subpaths" ]; then
  echo "No path containing a 'compile_commands.json' found"
  exit 1;
fi

if [ -n "$update_root" ]; then
  echo "===== UPDATING MAIN FILE ====="

  if [ ! -f "compile_commands.json" ]; then
    echo "Missing compile_commands.json, creating a new one..."
    echo "[]" > $THIS_PATH/compile_commands.json
  fi

  exec update_commands $THIS_PATH $subpaths
fi