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require 'rbconfig'
class GraphViz
module Utils
# Since this code is an adaptation of Launchy::Application#find_executable
# (http://copiousfreetime.rubyforge.org/launchy/Launchy/Application.html)
# it follow is licence :
#
# Permission to use, copy, modify, and/or distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED AS IS AND THE AUTHOR DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
# SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
# OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
# CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
def find_executable(bin, custom_paths) #:nodoc:
system_path = ENV['PATH']
user_given_path = Array(custom_paths).join(File::PATH_SEPARATOR)
search_path = system_path + File::PATH_SEPARATOR + user_given_path
search_path.split(File::PATH_SEPARATOR).each do |path|
file_path = File.join(path,bin)
return file_path if File.executable?(file_path) and File.file?(file_path)
if RbConfig::CONFIG['host_os'] =~ /mswin|mingw/ # WAS: elsif RUBY_PLATFORM =~ /mswin|mingw/
found_ext = (ENV['PATHEXT'] || '.exe;.bat;.com').split(";").find {|ext| File.executable?(file_path + ext) }
return file_path + found_ext if found_ext
end
end
return nil
end
def output_and_errors_from_command(cmd) #:nodoc:
unless defined? Open3
begin
require 'open3'
require 'win32/open3'
rescue LoadError
end
end
begin
out, err, status = Open3.capture3(*cmd, :binmode => true)
[out, err, status.exitstatus]
rescue NotImplementedError, NoMethodError
IO.popen( *cmd ) do |stdout|
stdout.binmode
[stdout.read, nil, nil]
end
end
end
def output_from_command(cmd) #:nodoc:
output, errors, status = output_and_errors_from_command(cmd)
if (status.nil? && (errors.nil? || errors.strip.empty?)) || status.zero?
output
else
raise "Error from #{cmd}:\n#{errors}"
end
end
end
end
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