ci.sh

#!/bin/sh

##### HELPERS #####

function update_git() # dir url branch
{
  dir=$1
  url=$2
  branch=$3
  if [ -d $dir ]; then
    echo 'Fetching existing git repo'
    cd $dir
    git fetch 2>&1 | sed "s/^/    /"
    if git checkout $branch 2> /dev/null > /dev/null; then
      git reset --hard origin/$branch 2>&1 | sed "s/^/    /"
    else
      git checkout -b $branch 2>&1 | sed "s/^/    /"
    fi
  else
    echo 'Cloning new git repo'
    git clone $url $dir 2>&1 | sed "s/^/    /"
    cd $dir
    if ! git checkout $branch 2>&1 | sed "s/^/    /"; then git checkout -b $branch 2>&1 | sed "s/^/    /"; fi
  fi
}

##### CONFIGURATION #####

USER=MultiMC
REPO=WonkoTheSane
SLEEP=60s # How long to sleep between polls
BRANCH=master

##### BUILDING #####

function build() # branch
{
  SRC=$PWD
  OUT=$PWD/../../02JanDal/WonkoTheSaneFiles
  EXE=./main.rb
  branch=$1

  echo 'Retrieving existing files...'
  cd ../..
  update_git 02JanDal/WonkoTheSaneFiles git@github.com:02JanDal/WonkoTheSaneFiles.git $branch
  cd $SRC
  if [ -d files ]; then rm -rf files; fi
  mkdir files
  #cp -r $OUT/* files/

  echo 'Cleaning...'
  $EXE --invalidate-all | sed "s/^/    /"
  echo 'Refreshing...'
  $EXE --refresh-all | sed "s/^/    /"

  echo 'Commiting changes...'
  cd $OUT
  find -type f | grep -vF ".git" | xargs git rm | sed "s/^/    /"
  cp -r $SRC/files/* .
  find -type f | grep -vF ".git" | xargs git add | sed "s/^/    /"
  git commit -m "Updated by CI" | sed "s/^/    /"
  git push origin $branch | sed "s/^/    /"
}

##### INITIAL SETUP #####

DIR=$PWD
REPO_DIR=$DIR/repos/$USER/$REPO/`echo $BRANCH | sed 's/\//_/'`

##### POLLING #####

while true; do
  cd $DIR
  touch headers
  ETAG=`grep -F "ETag:" headers | grep -oP "\".*\""`
  curl https://api.github.com/repos/$USER/$REPO/branches/$BRANCH -s -H "If-None-Match: $ETAG" -D headers > data.tmp
  echo "Requests remaining: `grep -F X-RateLimit-Remaining: headers | grep -oP "\d*"`, next reset: $(date --date="@`grep -F X-RateLimit-Reset: headers | grep -oP "\d*"`" +%H:%M:%S)"
  if ! grep -qF 304 headers
  then
    mv data.tmp data
  else
    rm data.tmp
  fi
  LATEST_COMMIT=`grep -F \"sha\": data | head -n1 | grep -oP "[a-f0-9]{10,100}"`
  CURRENT_COMMIT=`if [ -d $REPO_DIR ]; then cd $REPO_DIR && git rev-parse HEAD; fi`
  if ! [ "$LATEST_COMMIT" = "$CURRENT_COMMIT" ]; then
    update_git $REPO_DIR git@github.com:$USER/$REPO.git $BRANCH

    cd $REPO_DIR
    echo 'Building...'
    build $BRANCH | sed "s/^/    /"
    echo 'Done.'
  fi
  sleep $SLEEP
done