Akka/Scala example source code file (release_stats.sh)

This example Akka source code file (release_stats.sh) 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

akka-stats-script, bash_source, credits, example, fixed, h, usage, user-agent, x, y

The release_stats.sh Akka example source code

#!/usr/bin/env bash
#
# Generates statistics for release notes
#

# 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} <tag-from> <tag-to> <milestone-name>"
  echo "Example: ${script_name} v2.3.2 v2.3.3 2.3.3"
}

declare -r tag1=$1
declare -r tag2=$2
declare -r milestone_name=$3

declare -r tag_range="$tag1..$tag2"
declare authors=$($script_dir/authors.pl $tag_range)
declare author_count=$(echo "$authors" | wc -l | grep -o '[1-9].*')
declare diff_short=$(git diff --shortstat $tag_range | grep -o '[1-9].*')

declare script_user_agent="User-Agent: Akka-Stats-Script"
declare open_milestones=$(curl -s -H "$script_user_agent" "https://api.github.com/repos/akka/akka/milestones?state=open")
declare closed_milestones=$(curl -s -H "$script_user_agent" "https://api.github.com/repos/akka/akka/milestones?state=closed")
declare milestone_id=$(echo "$open_milestones$closed_milestones" | sed 's/"description"/\n/g' | perl -ne 'm/number":([0-9]+),"title":"(.+?)",/ && print "$1,$2\n"' | grep "$milestone_name" | cut -d"," -f 1)
declare tickets=$(curl -s -H "$script_user_agent" "https://api.github.com/repos/akka/akka/issues?milestone=$milestone_id&state=all&per_page=100" | sed 's/"comments"/\n/g' | perl -ne 'm/number":([0-9]+),"title":"(.+?)",/ && print " - *$1* $2\n"' | sort -n)
declare ticket_count=$(echo "$tickets" | wc -l | grep -o '[1-9].*')

echo "$tag1 compared to Akka $tag2":

echo "* $ticket_count tickets closed"

echo "* $diff_short"

echo "* X pages of docs vs Y in $tag1"

echo "* … and a total of $author_count committers!"

echo ""
echo "Fixed Tickets:"
echo "$tickets"

echo ""
echo "Credits:"
echo "commits added removed"
echo "$authors"