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|
=begin
= auto-reload.rb
Copyright (C) 2001 Shugo Maeda <shugo@modruby.net>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
SUCH DAMAGE.
== Overview
autoreload reloads modified libraries automatically.
This library is useful to develop mod_ruby scripts.
=end
module AutoReload
LIBRARY_MTIMES = {}
LIBRARY_DEPS = {}
PROCESSING_FILE = []
def AutoReload.find_library(lib)
if lib !~ /\.rb$/
lib += ".rb"
end
for dir in $:
file = File.expand_path(lib, dir)
file.untaint
return file if File.file?(file)
end
return nil
end
def require(lib)
unless file = AutoReload.find_library(lib)
return super(lib)
end
deps = LIBRARY_DEPS[file] ||= {}
PROCESSING_FILE.each do |f|
return false if f == file
LIBRARY_DEPS[f][file] = 1
end
PROCESSING_FILE.push file
begin
do_load = false
deps.each do |f,|
begin
if LIBRARY_MTIMES[f] != File.mtime(f)
do_load = true
break
end
rescue Errno::ENOENT
deps.delete f
end
end
mtime = File.mtime(file)
if do_load or LIBRARY_MTIMES[file] != mtime
result = load(file)
LIBRARY_MTIMES[file] = mtime
result
else
false
end
ensure
PROCESSING_FILE.pop
end
end
end
include AutoReload # override Kernel#require
|
