Akka/Scala example source code file (find-replace)

This example Akka source code file (find-replace) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Akka and Scala source code examples by using tags.

All credit for the original source code belongs to akka.io; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Akka tags/keywords

bash_source, find, il, p, this, usage

The find-replace Akka example source code

#!/usr/bin/env bash
#
# Find and replace across all source files.
# This script will be called as part of the release script.

# get the source location for this script; handles symlinks
function get_script_path {
  local source="${BASH_SOURCE[0]}"
  while [ -h "${source}" ] ; do
    source="$(readlink "${source}")";
  done
  echo ${source}
}

# path, name, and dir for this script
declare -r script_path=$(get_script_path)
declare -r script_name=$(basename "${script_path}")
declare -r script_dir="$(cd -P "$(dirname "${script_path}")" && pwd)"

# print usage info
function usage {
  echo "Usage: ${script_name} find_expr replace_expr"
}

function echolog {
  echo "[${script_name}] $@"
}

declare -r find_expr=$1
declare -r replace_expr=$2

if [ -z "$find_expr" ]; then
  usage
  exit 1
fi

echolog "$find_expr --> $replace_expr"

# exclude directories from search

declare exclude_dirs=".git project/project project/scripts src_managed target"

echolog "excluding directories: $exclude_dirs"

exclude_opts="\("
op="-path"
for dir in $exclude_dirs; do
  exclude_opts="${exclude_opts} ${op} '*/${dir}/*'"
  op="-or -path"
done
exclude_opts="${exclude_opts} \) -prune -o"

# replace in files

search="find . ${exclude_opts} -type f -print0 | xargs -0 grep -Il \"$find_expr\""

files=$(eval "$search")

simple_diff="diff --old-line-format='[$script_name]   - %l
' --new-line-format='[$script_name]   + %l
' --changed-group-format='%<%>' --unchanged-group-format=''"

for file in $files; do
  echolog $file
  # escape / for sed
  sedfind=$(echo $find_expr | sed 's/\//\\\//g')
  sedreplace=$(echo $replace_expr | sed 's/\//\\\//g')
  sed -i.sed "s/${sedfind}/${sedreplace}/g" $file
  eval "$simple_diff $file.sed $file"
  rm -f $file.sed
done

# replace in file names

search="find . ${exclude_opts} -type f -name \"*${find_expr}*\" -print"

files=$(eval "$search")

for file in $files; do
  dir=$(dirname $file)
  name=$(basename $file)
  newname=$(echo $name | sed "s/${find_expr}/${replace_expr}/g")
  echolog "$file --> $newname"
  mv $file $dir/$newname
done