run_optipng

#!/bin/bash

readonly REPO_URL="https://${BOT_AUTH_TOKEN}@github.com/triplea-game/assets.git"
sudo apt install optipng

git checkout  master
git config --global user.email "tripleabuilderbot@gmail.com"
git config --global user.name "tripleabuilderbot"


## find all PNG files, run lossless compression
## Filter output for errors, the line stating which file is being proccessed and percentage decrease
find . -name "*.png" \
  | xargs optipng -preserve -o7 2>&1 \
  | grep -iE "^** Processing|% decrease|error|warn"

## Toggle flag to fail on non-zero exit code.
## This will cause Travis to discontinue the build if we terminate with non-zero.
set -e

## If any files are changed, we'll commit them here
## If we commit and push, that will trigger a new build.
## If we trigger a new build, terminate the current build so we avoid deploying artifacts
git commit . -m "Apply optipng compression on all png files" && \
(
  git push --quiet "$REPO_URL" master
  echo "Committed compressed files. Terminating current build to abort deployment"
  exit 1
)

exit 0