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##
## LOGGING
##
module LeapCli
module LogCommand
@@logger = nil
def log(*args, &block)
logger.log(*args, &block)
end
def log_raw(*args, &block)
logger.log_raw(*args, &block)
end
# global shared logger
def logger
@@logger ||= LeapCli::LeapLogger.new
end
# thread safe logger
def new_logger
logger.dup
end
# deprecated
def log_level
logger.log_level
end
end
end
module LeapCli
class LeapLogger
#
# these are log titles typically associated with files
#
FILE_TITLES = %w(updated created removed missing nochange loading)
# TODO: use these
IMPORTANT = 0
INFO = 1
DEBUG = 2
TRACE = 3
attr_reader :log_output_stream, :log_file
attr_accessor :indent_level, :log_level, :log_in_color
def initialize()
@log_level = 1
@indent_level = 0
@log_file = nil
@log_output_stream = nil
@log_in_color = true
end
def log_file=(value)
@log_file = value
if @log_file
if !File.directory?(File.dirname(@log_file))
Util.bail!('Invalid log file "%s", directory "%s" does not exist' % [@log_file, File.dirname(@log_file)])
end
@log_output_stream = File.open(@log_file, 'a')
end
end
#
# master logging function.
#
# arguments can be a String, Integer, Symbol, or Hash, in any order.
#
# * String: treated as the message to log.
# * Integer: the log level (0, 1, 2)
# * Symbol: the prefix title to colorize. may be one of
# [:error, :warning, :info, :updated, :created, :removed, :no_change, :missing]
# * Hash: a hash of options.
# :wrap -- if true, appy intend to each line in message.
# :color -- apply color to message or prefix
# :style -- apply style to message or prefix
#
def log(*args)
level = args.grep(Integer).first || 1
title = args.grep(Symbol).first
message = args.grep(String).first
options = args.grep(Hash).first || {}
host = options[:host]
if title
title = title.to_s
end
if @log_level < level || (title.nil? && message.nil?)
return
end
#
# transform absolute path names
#
if title && FILE_TITLES.include?(title) && message =~ /^\//
message = LeapCli::Path.relative_path(message)
end
#
# apply filters
# LogFilter will not be defined if no platform was loaded.
#
if defined?(LeapCli::LogFilter)
if title
title, filter_flags = LogFilter.apply_title_filters(title)
else
message, filter_flags = LogFilter.apply_message_filters(message)
return if message.nil?
end
options = options.merge(filter_flags)
end
#
# set line prefix
#
prefix = prefix_str(host, title)
#
# write to the log file, always
#
log_raw(:log, nil, prefix) { message }
#
# log to stdout, maybe in color
#
if @log_in_color
if options[:wrap]
message = message.split("\n")
end
if options[:color]
if host
host = colorize(host, options[:color], options[:style])
elsif title
title = colorize(title, options[:color], options[:style])
else
message = colorize(message, options[:color], options[:style])
end
elsif title
title = colorize(title, :cyan, :bold)
end
# new colorized prefix:
prefix = prefix_str(host, title)
end
log_raw(:stdout, options[:indent], prefix) { message }
#
# run block indented, if given
#
if block_given?
@indent_level += 1
yield
@indent_level -= 1
end
end
def debug(*args)
self.log(3, *args)
end
#
# Add a raw log entry, without any modifications (other than indent).
# Content to be logged is yielded by the block.
# Block may be either a string or array of strings.
#
# if mode == :stdout, output is sent to STDOUT.
# if mode == :log, output is sent to log file, if present.
#
def log_raw(mode, indent=nil, prefix=nil, &block)
# NOTE: using 'print' produces better results than 'puts'
# when multiple threads are logging)
if mode == :log
if @log_output_stream
messages = [yield].compact.flatten
if messages.any?
timestamp = Time.now.strftime("%b %d %H:%M:%S")
messages.each do |message|
message = message.rstrip
next if message.empty?
@log_output_stream.print("#{timestamp} #{prefix} #{message}\n")
end
@log_output_stream.flush
end
end
elsif mode == :stdout
messages = [yield].compact.flatten
if messages.any?
indent ||= @indent_level
indent_str = ""
indent_str += " " * indent.to_i
if indent.to_i > 0
indent_str += ' - '
else
indent_str += ' = '
end
indent_str += prefix if prefix
messages.each do |message|
message = message.rstrip
next if message.empty?
STDOUT.print("#{indent_str}#{message}\n")
end
end
end
end
def colorize(str, color, style=nil)
codes = [FG_COLORS[color] || FG_COLORS[:default]]
if style
codes << EFFECTS[style] || EFFECTS[:nothing]
end
if str.is_a?(String)
["\033[%sm" % codes.join(';'), str, NO_COLOR].join
elsif str.is_a?(Array)
str.map { |s|
["\033[%sm" % codes.join(';'), s, NO_COLOR].join
}
end
end
private
def prefix_str(host, title)
prefix = ""
prefix += "[" + host + "] " if host
prefix += title + " " if title
prefix += " " if !prefix.empty? && prefix !~ / $/
return prefix
end
EFFECTS = {
:reset => 0, :nothing => 0,
:bright => 1, :bold => 1,
:underline => 4,
:inverse => 7, :swap => 7,
}
NO_COLOR = "\033[0m"
FG_COLORS = {
:black => 30,
:red => 31,
:green => 32,
:yellow => 33,
:blue => 34,
:magenta => 35,
:cyan => 36,
:white => 37,
:default => 39,
}
BG_COLORS = {
:black => 40,
:red => 41,
:green => 42,
:yellow => 43,
:blue => 44,
:magenta => 45,
:cyan => 46,
:white => 47,
:default => 49,
}
end
end
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