entrypoint.sh

#!/bin/bash

warn () {
  text=$1
  echo -e "\e[1;33m $text \e[0m"
}

fail () {
  text=$1
  echo -e "\e[1;31m $text \e[0m"
  exit 1
}

success () {
  text=$1
  echo -e "\e[1;32m $text \e[0m"
}

info () {
  text=$1
  echo -e "\e[1;34m $text \e[0m"
}

debug () {
  text=$1
  echo -e "\e[1;40m $text \e[0m"
}

set_auth() {
  local s3cnf="$HOME/.s3cfg"

  if [ -e "$s3cnf" ]; then
    warn '.s3cfg file already exists in home directory and will be overwritten'
  fi

  echo '[default]' > "$s3cnf"
  echo "access_key=$AWS_ACCESS_KEY_ID" >> "$s3cnf"
  echo "secret_key=$AWS_SECRET_ACCESS_KEY" >> "$s3cnf"

  echo "Generated .s3cfg for key $AWS_ACCESS_KEY_ID"
}

main() {
  set_auth

  info 'Starting S3 Synchronisation'

  info 'Check s3cmd version'
  info $(s3cmd --version)

  if [ -z "$AWS_S3_BUCKET" ]; then
    fail 'AWS_S3_BUCKET is not set. Quitting.'
  fi

  if [ -z "$AWS_ACCESS_KEY_ID" ]; then
    fail 'AWS_ACCESS_KEY_ID is not set. Quitting.'
  fi

  if [ -z "$AWS_SECRET_ACCESS_KEY" ]; then
    fail 'AWS_SECRET_ACCESS_KEY is not set. Quitting.'
  fi

  # Default to us-east-1 if AWS_REGION not set.
  if [ -z "$AWS_REGION" ]; then
    export AWS_REGION="us-east-1"
  fi


  if [ -z "$S3CMD_SOURCE_DIR" ]; then
    FILES_SOURCE_DIR="./*"
  else
    FILES_SOURCE_DIR="./$S3CMD_SOURCE_DIR"
  fi

  if [ -n "$S3CMD_CF_INVALIDATE" ]; then
      if [ "$S3CMD_CF_INVALIDATE" = "true" ]; then
          S3CMD_CF_INVALIDATE="--cf-invalidate"
      else
        unset S3CMD_CF_INVALIDATE
      fi
  fi

  if [ -z "$S3CMD_EXTRA_OPTS" ]; then
      S3CMD_EXTRA_OPTS="--verbose"
  fi

  if [ -n "$S3CMD_DELETE_REMOVED" ]; then
      if [ "$S3CMD_DELETE_REMOVED" = "true" ]; then
          export S3CMD_DELETE_REMOVED="--delete-removed"
      else
          unset S3CMD_DELETE_REMOVED
      fi
  else
      export S3CMD_DELETE_REMOVED="--delete-removed"
  fi

  if [ -n "$S3CMD_EXCLUDE" ]; then
      if [ -e "$S3CMD_EXCLUDE" ]; then
        S3CMD_EXCLUDE="--exclude $S3CMD_EXCLUDE"
      else
        unset S3CMD_EXCLUDE
      fi
  fi

  if [ -n "$S3CMD_EXCLUDE_FROM" ]; then
      if [ -e "$S3CMD_EXCLUDE_FROM" ]; then
          S3CMD_EXCLUDE_FROM="--exclude-from $S3CMD_EXCLUDE_FROM"
      else
        unset S3CMD_EXCLUDE_FROM
      fi
  fi

  if [ -z "$S3CMD_ADD_HEADERS" ]; then
      S3CMD_ADD_HEADERS=""
  fi

  export IFS='|'
  for header in $S3CMD_ADD_HEADERS; do
    ADD_HEADERS="--add-header=\"$header\" $ADD_HEADERS"
  done

  COMMAND_SUFIX="sync $FILES_SOURCE_DIR s3://$AWS_S3_BUCKET"

  command="s3cmd --no-preserve $S3CMD_EXTRA_OPTS $S3CMD_EXCLUDE_FROM $S3CMD_DELETE_REMOVED $ADD_HEADERS $S3CMD_CF_INVALIDATE $COMMAND_SUFIX"

  debug $command

  bash -c $command
  RESULT=$?

  if [[ $? -eq 0 ]]; then
      success 'Finished S3 Synchronisation';
  else
      fail 'Failed s3cmd command';
  fi

  warn 'Removing .s3cfg credentials'
  rm "$HOME/.s3cfg"
}

main