docker-entrypoint-example

#!/usr/bin/env bash

#
# This is an example entrypoint that demonstrates how to name runners after the
# docker container index.
#
# echo "main" > ./runners/runner1
# echo "siteA" > ./runners/runner2
# echo "siteB" > ./runners/runner3
# echo "siteC" > ./runners/runner4
#
# docker-compose --scale runner=4
#
# Then, this script will generate a runner name based on the contents of those files.
#

set -e

start() {
  export RUNNER_NUMBER=$(./whichami)

  # Load the runner name from files in the repo.
  export RUNNER_CONFIG_NAME="$(cat runners/runner${RUNNER_NUMBER})@$(hostname -f)"

  # Set a global label for each project's runner.
  export RUNNER_CONFIG_LABELS="$(cat runners/runner${RUNNER_NUMBER})@project"

  line
  say "Welcome to docker-entrypoint."
  say "Launching runner ${RUNNER_CONFIG_NAME}..."
  line
  exec "${@}"

}
say() {
  echo " git-runners-entrypoint | ${*}"
}
line() {
  CHARACTER="${CHARACTER:--}"
  COLUMNS="${COLUMNS:-$(tput cols -T xterm)}"
  printf '%*s\n' "${COLUMNS}" '' | tr ' ' "${CHARACTER}"
}

start "${@}"