5 ## time for some monkeypatching!
9 'host' => "#{ Socket.gethostname }",
10 'pid' => "#{ Process.pid }",
11 'ppid' => "#{ Process.ppid }",
18 def dump_lock_id lock_id = @lock_id
19 "host: %s\npid: %s\nppid: %s\ntime: %s\nuser: %s\npname: %s\n" %
20 lock_id.values_at('host','pid','ppid','time','user', 'pname')
24 h = load_lock_id IO.read(path)
25 h['mtime'] = File.mtime path
29 def touch_yourself; touch path end
37 rescue SystemCallError
43 elsif s < (1024 * 1024)
45 elsif s < (1024 * 1024 * 1024)
46 (s / 1024 / 1024).to_s + "m"
48 (s / 1024 / 1024 / 1024).to_s + "g"
54 ctime.strftime("%Y-%m-%d %H:%M")
55 rescue SystemCallError
61 ## more monkeypatching!
63 class EncodingUnsupportedError < StandardError; end
66 def add_file_attachment fn
67 bfn = File.basename fn
69 t = MIME::Types.type_for(bfn).first || MIME::Types.type_for("exe").first
71 a.header.add "Content-Disposition", "attachment; filename=#{bfn.to_s.inspect}"
72 a.header.add "Content-Type", "#{t.content_type}; name=#{bfn.to_s.inspect}"
73 a.header.add "Content-Transfer-Encoding", t.encoding
77 [IO.read(fn)].pack "m"
78 when "quoted-printable"
79 [IO.read(fn)].pack "M"
83 raise EncodingUnsupportedError, t.encoding
90 if header.field?("content-type") && header.fetch("content-type") =~ /charset="?(.*?)"?(;|$)/
98 ## only valid for integer ranges (unless I guess it's exclusive)
100 last - first + (exclude_end? ? 0 : 1)
105 def bool_reader *args
106 args.each { |sym| class_eval %{ def #{sym}?; @#{sym}; end } }
108 def bool_writer *args; attr_writer(*args); end
109 def bool_accessor *args
114 def defer_all_other_method_calls_to obj
116 def method_missing meth, *a, &b; @#{obj}.send meth, *a, &b; end
117 def respond_to? meth; @#{obj}.respond_to?(meth); end
127 until klass == Object
129 klass = klass.superclass
135 def returning x; yield x; x; end
137 ## clone of java-style whole-method synchronization
138 ## assumes a @mutex variable
139 ## TODO: clean up, try harder to avoid namespace collisions
140 def synchronized *meth
143 alias unsynchronized_#{meth} #{meth}
145 @mutex.synchronize { unsynchronized_#{meth}(*a, &b) }
151 def ignore_concurrent_calls *meth
153 mutex = "@__concurrent_protector_#{meth}"
154 flag = "@__concurrent_flag_#{meth}"
155 oldmeth = "__unprotected_#{meth}"
157 alias #{oldmeth} #{meth}
159 #{mutex} = Mutex.new unless defined? #{mutex}
160 #{flag} = true unless defined? #{flag}
161 run = #{mutex}.synchronize do
168 ret = #{oldmeth}(*a, &b)
169 #{mutex}.synchronize { #{flag} = true }
180 self.gsub(/([a-z])([A-Z0-9])/, '\1-\2').downcase
183 def find_all_positions x
196 self[0 .. 0].upcase + self[1 .. -1]
199 ## a very complicated regex found on teh internets to split on
200 ## commas, unless they occurr within double quotes.
202 split(/,\s*(?=(?:[^"]*"[^"]*")*(?![^"]*"))/)
209 cut = s[0 ... len].rindex(/\s/)
212 s = s[(cut + 1) .. -1]
221 def normalize_whitespace
222 gsub(/\t/, " ").gsub(/\r/, "")
237 def in? range; range.member? self; end
241 def num_digits base=10
242 return 1 if self == 0
243 1 + (Math.log(self) / Math.log(10)).floor
247 if self < 128 && self >= 0
257 Hash[*self.map { |k, v| [k, v] unless o.include? k }.compact.flatten_one_level]
260 def select_by_value v=true
261 select { |k, vv| vv == v }.map { |x| x.first }
268 each_with_index { |x, i| ret << yield(x, i) }
272 def sum; inject(0) { |x, y| x + y }; end
276 each { |x| ret[x] = yield(x) }
280 # like find, except returns the value of the block rather than the
284 find { |e| ret ||= yield(e) }
289 best, bestval = nil, nil
292 if bestval.nil? || val < bestval
293 best, bestval = e, val
299 ## returns the maximum shared prefix of an array of strings
300 ## optinally excluding a prefix
301 def shared_prefix caseless=false, exclude=""
304 (0 ... first.length).each do |i|
305 c = (caseless ? first.downcase : first)[i]
306 break unless all? { |s| (caseless ? s.downcase : s)[i] == c }
307 next if exclude[i] == c
308 prefix += first[i].chr
314 map { |e| yield e }.max
319 def flatten_one_level
320 inject([]) { |a, e| a + e }
323 def to_h; Hash[*flatten]; end
324 def rest; self[1..-1]; end
326 def to_boolean_h; Hash[*map { |x| [x, true] }.flatten]; end
328 def last= e; self[-1] = e end
333 sprintf "%012d", self
340 self + (60 - min) * 60
344 def midnight # within a second
345 self - (hour * 60 * 60) - (min * 60) - sec
348 def is_the_same_day? other
349 (midnight - other.midnight).abs < 1
352 def is_the_day_before? other
353 other.midnight - midnight <= 24 * 60 * 60 + 1
356 def to_nice_distance_s from=Time.now
357 later_than = (self < from)
358 diff = (self.to_i - from.to_i).abs.to_f
364 ["week", 4.345], # heh heh
367 ].argfind do |unit, size|
370 elsif size.nil? || diff.round < size
371 "#{diff.round} #{unit}s"
384 TO_NICE_S_MAX_LEN = 9 # e.g. "Yest.10am"
385 def to_nice_s from=Time.now
388 elsif month != from.month
391 if is_the_same_day? from
393 elsif is_the_day_before? from
394 "Yest." + nearest_hour.strftime("%l%P")
402 ## simple singleton module. far less complete and insane than the ruby
403 ## standard library one, but automatically forwards methods calls and
404 ## allows for constructors that take arguments.
406 ## You must have #initialize call "self.class.i_am_the_instance self"
407 ## at some point or everything will fail horribly.
410 def instance; @instance; end
411 def instantiated?; defined?(@instance) && !@instance.nil?; end
412 def deinstantiate!; @instance = nil; end
413 def method_missing meth, *a, &b
414 raise "no instance defined!" unless defined? @instance
416 ## if we've been deinstantiated, just drop all calls. this is
417 ## useful because threads that might be active during the
418 ## cleanup process (e.g. polling) would otherwise have to
419 ## special-case every call to a Singleton object
420 return nil if @instance.nil?
422 @instance.send meth, *a, &b
424 def i_am_the_instance o
425 raise "there can be only one! (instance)" if defined? @instance
430 def self.included klass
431 klass.extend ClassMethods
435 ## wraps an object. if it throws an exception, keeps a copy, and
436 ## rethrows it for any further method calls.
443 def clear_error!; @e = nil; end
444 def has_errors?; !@e.nil?; end
447 def method_missing m, *a, &b; __pass m, *a, &b; end
449 def id; __pass :id; end
450 def to_s; __pass :to_s; end
451 def to_yaml x; __pass :to_yaml, x; end
452 def is_a? c; @o.is_a? c; end
454 def respond_to? m; @o.respond_to? m end
459 rescue Exception => e
466 ## acts like a hash with an initialization block, but saves any
467 ## newly-created value even upon lookup.
472 ## attr_accessor :val
473 ## def initialize; @val = 0 end
476 ## h = Hash.new { C.new }
481 ## h2 = SavingHash.new { C.new }
486 ## important note: you REALLY want to use #member? to test existence,
487 ## because just checking h[anything] will always evaluate to true
488 ## (except for degenerate constructor blocks that return nil or false)
496 @hash[k] ||= @constructor.call(k)
499 defer_all_other_method_calls_to :hash