# Copyright:: Copyright 2008-2016, Chef Software Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
CHEF_SPEC_DATA = File.expand_path(File.dirname(__FILE__) + "/../data/")
CHEF_SPEC_ASSETS = File.expand_path(File.dirname(__FILE__) + "/../functional/assets/")
CHEF_SPEC_BACKUP_PATH = File.join(Dir.tmpdir, "test-backup-path")

Chef::Config[:log_level] = :fatal
Chef::Config[:persistent_queue] = false
Chef::Config[:file_backup_path] = CHEF_SPEC_BACKUP_PATH

Chef::Log.init(StringIO.new)
Chef::Log.level(Chef::Config.log_level)
Chef::Config.solo(false)

def sha256_checksum(path)
  OpenSSL::Digest::SHA256.hexdigest(File.read(path))
end

# From Ruby 1.9.2+
# Here for backwards compatibility with Ruby 1.8.7
# http://rubydoc.info/stdlib/tmpdir/1.9.2/Dir/Tmpname
def make_tmpname(prefix_suffix, n = nil)
  case prefix_suffix
  when String
    prefix = prefix_suffix
    suffix = ""
  when Array
    prefix = prefix_suffix[0]
    suffix = prefix_suffix[1]
  else
    raise ArgumentError, "unexpected prefix_suffix: #{prefix_suffix.inspect}"
  end
  t = Time.now.strftime("%Y%m%d")
  path = "#{prefix}#{t}-#{$$}-#{rand(0x100000000).to_s(36)}"
  path << "-#{n}" if n
  path << suffix
end

# NOTE:
# This is a temporary fix to get tests passing on systems that have no `diff`
# until we can replace shelling out to `diff` with ruby diff-lcs
def has_diff?
  diff_cmd = Mixlib::ShellOut.new("diff -v")
  diff_cmd.run_command
  true
rescue Errno::ENOENT
  false
end

# This is a helper to determine if the ruby in the PATH contains
# win32/service gem. windows_service_manager tests create a windows
# service that starts with the system ruby and requires this gem.
def system_windows_service_gem?
  windows_service_gem_check_command = %q{ruby -r "win32/daemon" -e ":noop"}
  if defined?(Bundler)
    Bundler.with_clean_env do
      # This returns true if the gem can be loaded
      system(windows_service_gem_check_command)
    end
  else
    # This returns true if the gem can be loaded
    system(windows_service_gem_check_command)
  end
end

# This is a helper to canonicalize paths that we're using in the file
# tests.
def canonicalize_path(path)
  windows? ? path.tr("/", '\\') : path
end

# Makes a temp directory with a canonical path on any platform.
# Only really needed to work around an issue on Windows where
# Ruby's temp library generates paths with short names.
def make_canonical_temp_directory
  temp_directory = Dir.mktmpdir
  if windows?
    # On Windows, temporary file / directory path names may have shortened
    # subdirectory names due to reliance on the TMP and TEMP environment variables
    # in some Windows APIs and duplicated logic in Ruby's temp file implementation.
    # To work around this in the unit test context, we obtain the long (canonical)
    # path name via a Windows system call so that this path name can be used
    # in expectations that assume the ability to canonically name paths in comparisons.
    # Note that this was not an issue prior to Ruby 2.2 -- with Ruby 2.2,
    # some Chef code started to use long file names, while Ruby's temp file implementation
    # continued to return the shortened names -- this would cause these particular tests to
    # fail if the username happened to be longer than 8 characters.
    Chef::ReservedNames::Win32::File.get_long_path_name(temp_directory)
  else
    temp_directory
  end
end

# Check if a cmd exists on the PATH
def which(cmd)
  paths = ENV["PATH"].split(File::PATH_SEPARATOR) + [ "/bin", "/usr/bin", "/sbin", "/usr/sbin" ]
  paths.each do |path|
    filename = File.join(path, cmd)
    return filename if File.executable?(filename)
  end
  false
end