1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
| | #!/home/ew/bin/ruby
$stdin.sync = $stdout.sync = $stderr.sync = true
require 'unicorn' # require this first to populate Unicorn::DEFAULT_START_CTX
require 'optparse'
require 'fileutils'
rails_pid = File.join(Unicorn::HttpServer::DEFAULT_START_CTX[:cwd],
"/tmp/pids/unicorn.pid")
cmd = File.basename($0)
daemonize = false
listeners = []
options = { :listeners => listeners }
host, port = Unicorn::Const::DEFAULT_HOST, 3000
ENV['RAILS_ENV'] ||= "development"
map_path = ENV['RAILS_RELATIVE_URL_ROOT']
opts = OptionParser.new("", 24, ' ') do |opts|
opts.banner = "Usage: #{cmd} " \
"[ruby options] [#{cmd} options] [rackup config file]"
opts.separator "Ruby options:"
lineno = 1
opts.on("-e", "--eval LINE", "evaluate a LINE of code") do |line|
eval line, TOPLEVEL_BINDING, "-e", lineno
lineno += 1
end
opts.on("-d", "--debug", "set debugging flags (set $DEBUG to true)") do
$DEBUG = true
end
opts.on("-w", "--warn", "turn warnings on for your script") do
$-w = true
end
opts.on("-I", "--include PATH",
"specify $LOAD_PATH (may be used more than once)") do |path|
$LOAD_PATH.unshift(*path.split(/:/))
end
opts.on("-r", "--require LIBRARY",
"require the library, before executing your script") do |library|
require library
end
opts.separator "#{cmd} options:"
# some of these switches exist for rackup command-line compatibility,
opts.on("-o", "--host HOST",
"listen on HOST (default: #{Unicorn::Const::DEFAULT_HOST})") do |h|
host = h
end
opts.on("-p", "--port PORT", "use PORT (default: #{port})") do |p|
port = p.to_i
end
opts.on("-E", "--env ENVIRONMENT",
"use ENVIRONMENT for defaults (default: development)") do |e|
ENV['RAILS_ENV'] = e
end
opts.on("-D", "--daemonize", "run daemonized in the background") do |d|
daemonize = d ? true : false
end
# Unicorn-specific stuff
opts.on("-l", "--listen {HOST:PORT|PATH}",
"listen on HOST:PORT or PATH",
"this may be specified multiple times",
"(default: #{Unicorn::Const::DEFAULT_LISTEN})") do |address|
listeners << address
end
opts.on("-c", "--config-file FILE", "Unicorn-specific config file") do |f|
options[:config_file] = File.expand_path(f)
end
opts.on("-P", "--path PATH", "Runs Rails app mounted at a specific path.",
"(default: /") do |v|
map_path = v
end
# I'm avoiding Unicorn-specific config options on the command-line.
# IMNSHO, config options on the command-line are redundant given
# config files and make things unnecessarily complicated with multiple
# places to look for a config option.
opts.separator "Common options:"
opts.on_tail("-h", "--help", "Show this message") do
puts opts
exit
end
opts.on_tail("-v", "--version", "Show version") do
puts " v#{Unicorn::Const::UNICORN_VERSION}"
exit
end
opts.parse! ARGV
end
require 'pp' if $DEBUG
# Loads Rails and the private version of Rack it bundles. Returns a
# lambda of arity==0 that will return *another* lambda of arity==1
# suitable for using inside Rack::Builder.new block.
rails_loader = lambda do ||
begin
require 'config/boot'
defined?(::RAILS_ROOT) or abort "RAILS_ROOT not defined by config/boot"
defined?(::RAILS_ENV) or abort "RAILS_ENV not defined by config/boot"
defined?(::Rails::VERSION::STRING) or
abort "Rails::VERSION::STRING not defined by config/boot"
rescue LoadError
abort "#$0 must be run inside RAILS_ROOT (#{::RAILS_ROOT})"
end
if ENV['UNICORN_RAILS_USE_SYSTEM_RACK'].to_i == 0
rails_ver = Rails::VERSION::STRING
# maps Rails versions to the vendorized Rack version they bundle
version_map = {
'2.3.2' => '1.0',
# 3.0.0 => false, # assuming 3.0.0 doesn't need vendorized Rack anymore
}
rack_ver = version_map[rails_ver] or
warn "Possibly unsupported Rails version: v#{rails_ver}"
rack_path = nil
case rack_ver
when String, NilClass
version_map.values.find_all { |v| String === v }.sort.each do |v|
$LOAD_PATH.grep(%r{/actionpack-[\d\.]+/lib/?\z}).each do |path|
rack_path = File.join(path, "action_controller/vendor/rack-#{v}")
File.directory?(rack_path) and break
rack_path = nil
end
break if rack_path
end
rack_path or abort(
"Unable to find Rails-vendorized Rack library.\n" \
"Perhaps this script is no longer with your" \
"Rails version (#{rails_ver}).\n")
puts "vendorized Rack load path #{rack_path}"
$LOAD_PATH.unshift(rack_path)
when FalseClass
# using non-vendorized rack library (most likely via gems)
end
end # Vendorized Rack LOAD_PATH finder
# require Rack as late as possible in case $LOAD_PATH is modified
# in config.ru or command-line
require 'rack'
# return the lambda
config = ::ARGV[0] || (File.exist?('config.ru') ? 'config.ru' : nil)
case config
when nil
lambda do ||
require "#{RAILS_ROOT}/config/environment"
ActionController::Dispatcher.new
end
when /\.ru$/
raw = File.open(config, "rb") { |fp| fp.sysread(fp.stat.size) }
# parse embedded command-line options in config.ru comments
if raw[/^#\\(.*)/]
opts.parse! $1.split(/\s+/)
require 'pp' if $DEBUG
end
lambda { || eval("Rack::Builder.new {(#{raw}\n)}.to_app", nil, config) }
else
lambda do ||
require config
Object.const_get(File.basename(config, '.rb').capitalize)
end
end
end
# this won't run until after forking if preload_app is false
app = lambda do ||
inner_app = rails_loader.call
require 'active_support'
require 'action_controller'
ActionController::Base.relative_url_root = map_path if map_path
Rack::Builder.new do
use Rails::Rack::LogTailer unless daemonize
use Rails::Rack::Debugger if $DEBUG
map(map_path || '/') do
use Rails::Rack::Static
run inner_app.call
end
end.to_app
end
if listeners.empty?
listener = "#{host}:#{port}"
listeners << listener
end
if $DEBUG
pp({
:unicorn_options => options,
:app => app,
:daemonize => daemonize,
})
end
# only daemonize if we're not inheriting file descriptors from our parent
if daemonize
options[:pid] = rails_pid
$stdin.reopen("/dev/null")
unless ENV['UNICORN_FD']
exit if fork
Process.setsid
exit if fork
end
# We don't do a lot of standard daemonization stuff:
# * $stderr/$stderr can/will be redirected separately
# * umask is whatever was set by the parent process at startup
# and can be set in config.ru and config_file, so making it
# 0000 and potentially exposing sensitive log data can be bad
# policy.
# * Don't bother to chdir here since Unicorn is designed to
# run inside APP_ROOT. Unicorn will also re-chdir() to
# the directory it was started in when being re-executed
# to pickup code changes if the original deployment directory
# is a symlink or otherwise got replaced.
end
# ensure Rails standard tmp paths exist
%w(cache pids sessions sockets).each do |dir|
FileUtils.mkdir_p("tmp/#{dir}")
end
Unicorn.run(app, options)
|