Build on commit.

ci.sh

#!/bin/bash

# A poor man's CI server for gradle jobs.
# PUt in root directory of project.
# If GIT_URL is set, it will clone for you.
# Will speak and display pop up on build status change.

set -eu

INTERVAL=60
GIT_URL=''
BRANCH='develop'
TASK='test'
lastsuccessful=true

init() {
  if [[ -n "$GIT_URL" ]] && ! [[ -d .git ]]; then
    git init
    git remote add origin "$GIT_URL"
    git pull origin "$BRANCH"
  fi
}

build() {
  commit="$(git rev-parse --short HEAD)"
  result=0
  if !  nice -n 12 ./gradlew "$TASK" --no-daemon > "gradle-${commit}.log" 2>&1; then
    grep -i failed "gradle-${commit}.log"
    result=1
  fi
  return "$result"
}

alert() {
  zenity --error --text "$(date +%T) $1" &
  #notify-send "$1"
  speak-ng "$1"
  echo "$(date +%T) $1" | tee -a ci.log
}

loop() {
  git checkout "$BRANCH"
  lastcommit="$(git rev-parse --short HEAD)"

  while true; do
    git checkout "$BRANCH"
    git pull -q --all

    commit="$(git log --branches --remotes --pretty=format:%h -1)"

    if [[ "$lastcommit" != "$commit" ]]; then
      echo "$(date +%T) lastsuccessful=$lastsuccessful $commit"
      git --no-pager log --oneline "${lastcommit}..${commit}" --graph
      if "$lastsuccessful" && ! build; then
        alert "Build failed"
        lastsuccessful=false
      elif ! "$lastsuccessful" && build; then
        alert "Build successful"
        lastsuccessful=true
      fi
      echo "$(date +%T) done."
    fi
    lastcommit="$commit"

    sleep "$INTERVAL"
  done
}

main() {
  init
  loop
}

main