downstream-helpers

#!/usr/bin/env bash

# shell-helpers downstreamer version v1
#   https://github.com/briceburg/shell-helpers
# Copyright 2016-present Brice Burgess, Licensed under the Apache License 2.0

#  * requires curl
#
# place in the directory containing shell-helpers library files and execute to
# fetch the latest release of all shell-helpers files.
#
# alternatively pass the path of directory containing shell-helpers files, e.g.
# ./downstream-helpers /path/to/shell-helper-files/
#
# an example at bottom demonstrates hardcoding the helpers path
#

main(){
  readonly workdir="$1"
  readonly CWD="$( cd $(dirname $0) ; pwd -P )"

  local pattern="# @shell-helpers_UPDATE_URL="
  local file
  local match
  local url

  set -eo pipefail
  exec >&2

  cd "${workdir:-$CWD}"
  for file in *; do
    echo "tyring $workdir/$file"
    match=$(grep -m1 "^$pattern" "$file" 2>/dev/null) || \
      continue

    url=${match//$pattern/}
    echo "  replacing $file with $url ..."
    curl --silent -Lf $url > $file  || \
      echo "  ! failed to download $url"
  done
}

# :: example hardcoding of workdir [uncomment below lines]
# readonly SCRIPT_CWD=$( cd $(dirname "${BASH_SOURCE[0]}") ; pwd -P )
# main "$SCRIPT_CWD/common/lib.d/helpers"

main "$@"