go-gh.sh

#!/usr/bin/env bash

function cleanup {
  rm -rf "$WORK_DIR"
  echo -e "\033[33mDeleted temp working directory $WORK_DIR\033[0m"
}

function check-deps() {
  if ! which abc2midi &> /dev/null; then
  	>&2 echo “Error: Please install abc2midi and make sure it is in your path”
  	exit 1
  fi

  if ! which lein &> /dev/null; then
  	>&2 echo “Error: Please install Leinginen and make sure it is in your path”
  	exit 1
  fi

  if ! which java &> /dev/null; then
  	>&2 echo “Error: Please install Java and make sure it is in your path”
  	exit 1
  fi

  if ! which timidity &> /dev/null; then
  	>&2 echo “Error: Please install timidity and make sure it is in your path”
  	exit 1
  fi
}

function check-usage() {
  if [[ $# -lt 2 ]]; then
    >&2 echo "Usage: go-gh.sh <github-user> <github-repo>"
    exit 1
  fi
}

function clone-repo() {
  echo -e "\033[33mCloning repo to $WORK_DIR...\033[0m"
  cd $WORK_DIR
  git clone -q https://github.com/$GITHUB_USER/$GITHUB_REPO.git
}

function collect-commit-info() {
  echo -e "\033[33mFind commit history for each Java file...\033[0m"
  pushd $WORK_DIR/$GITHUB_REPO >/dev/null
  find . -regex $SOURCE_FILE_RE | xargs -n1 git blame -f -t -e | awk -v PREFIX=${WORK_DIR}/${GITHUB_REPO}/ -F "[ ()]+" '{print "{ :source-file \"" PREFIX $2 "#"$6 "\" :author \"" $3 "\" :timestamp " $4 " }" }' > ${WORK_DIR}/blames.txt
  popd >/dev/null
}

function collect-duplication-metrics() {
  echo -e "\033[34mGenerating Checkstyle duplication metrics...\033[0m"
  DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
  CHECKSTYLEDIR=$DIR/resources
  java -jar $CHECKSTYLEDIR/simian-2.4.0.jar -threshold=4 -failOnDuplication- -excludes="**/test/**/*.java" $WORK_DIR/**/*.java | tail -3 | head -2 > ${WORK_DIR}/duplication.txt
  DUPLICATESTATS=`cat ${WORK_DIR}/duplication.txt`
  TOTALDUPLINESRE='Found ([0-9]+).*'
  TOTALLINESRE='Processed a total of ([0-9]+).*'
  [[ "${DUPLICATESTATS}" =~ ${TOTALDUPLINESRE} ]]
  TOTALDUPLINES=${BASH_REMATCH[1]}
  [[ "${DUPLICATESTATS}" =~ ${TOTALLINESRE} ]]
  TOTALLINES=${BASH_REMATCH[1]}
}

function collect-checkstyle-metrics() {
  echo -e "\033[33mRunning metrics on all Java files...\033[0m"
  find $WORK_DIR -regex $SOURCE_FILE_RE -exec ./go.sh '{}' $WORK_DIR \;
}

function join-all-metrics() {
  UBERMETRICSFILE=${WORK_DIR}/${GITHUB_REPO}.metrics
  echo -e "\033[33mBuilding uber metrics file...\033[0m"
  cat $WORK_DIR/*.metrics.all > ${UBERMETRICSFILE}

  echo -e "\033[33mJoining metrics file with Git commit history...\033[0m"
  join -j 3 -a 2 <(sort -k 1b,3 ${WORK_DIR}/blames.txt) <(sort -k 1b,3 ${UBERMETRICSFILE}) | sort -V | cut -d " " -f1,2,3,8,9,10 --complement > ${UBERMETRICSFILE}.history
  sed -i 's/^/{/' ${UBERMETRICSFILE}.history
}

function generate-abc() {
  echo -e "\033[33mGenerating ABC notation...\033[0m"
  source ./gen-abc.sh
}

function generate-midi() {
  ABCFILE=${UBERMETRICSFILE}.history.abc
  MIDIFILE=${UBERMETRICSFILE}.mid
  echo -e "\033[33mGenerating MIDI...\033[0m"
  abc2midi ${ABCFILE} -s -o ${MIDIFILE} > /dev/null

  MIDIARCHIVEDIR=${DIR}/archive/midi
  ABCARCHIVEDIR=${DIR}/archive/abc
  mkdir -p ${MIDIARCHIVEDIR}
  mkdir -p ${ABCARCHIVEDIR}
  echo -e "\033[33mArchiving generated files...\033[0m"
  TIMESTAMP=$( date +"%Y-%m-%d_%H-%M-%S" )
  cp ${MIDIFILE} ${MIDIARCHIVEDIR}/${GITHUB_REPO}.${TIMESTAMP}.mid
  cp ${ABCFILE} ${ABCARCHIVEDIR}/${GITHUB_REPO}.${TIMESTAMP}.abc
}

function play-midi() {
  echo -e "\033[33mPlaying MIDI...\033[0m"
  timidity ${MIDIFILE} > /dev/null
  echo -e "\033[33mTo play again: timidity ${MIDIARCHIVEDIR}/${GITHUB_REPO}.${TIMESTAMP}.mid > /dev/null\033[0m"
}

set -e
set -o pipefail
set -o nounset

check-usage $@
check-deps

DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
GITHUB_USER=$1
GITHUB_REPO=$2

echo -e "\033[33mChecking GitHub for repo '$GITHUB_REPO' for user '$GITHUB_USER'...\033[0m"

WORK_DIR=`mktemp -d -p "$DIR/target"`
BIN_DIR=$DIR
SOURCE_FILE_RE=".*[^Test]\.java"

clone-repo

cd $BIN_DIR

collect-commit-info
collect-duplication-metrics
collect-checkstyle-metrics
join-all-metrics
generate-abc
generate-midi
play-midi

# register the cleanup function to be called on the EXIT signal
trap cleanup EXIT