error related to REXML - ruby

Question

I'm not sure it's REXML or ruby issue.
But this is happening when I work with REXML.
The program below should access elements of each xml file in the directory.
#!/usr/bin/ruby -w
require 'rexml/document'
include REXML
p "Current directory was: " + Dir.pwd
Dir.chdir("/home/askar/xml_files1") {
p "Now we're in: " + Dir.pwd
if File.exist?(Dir.pwd)
xml_files = Dir.glob("ShipmentRequest*.xml")
Dir.foreach(Dir.pwd) do |file|
xmlfile = File.new(file)
xmldoc = Document.new(xmlfile)
end
else
puts "It's empty"
end
}
When I run:
ruby import_xml.rb
Errors:
"Current directory was: /home/askar/Dropbox/rails_studio/xml_to_mysql"
"Now we're in: /home/askar/xml_files1"
There're 6226 files in the folder...
/home/askar/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/rexml/source.rb:148:in `read': Is a directory - . (Errno::EISDIR)
from /home/askar/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/rexml/source.rb:148:in `initialize'
from /home/askar/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/rexml/source.rb:14:in `new'
from /home/askar/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/rexml/source.rb:14:in `create_from'
from /home/askar/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/rexml/parsers/baseparser.rb:127:in `stream='
from /home/askar/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/rexml/parsers/baseparser.rb:116:in `initialize'
from /home/askar/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/rexml/parsers/treeparser.rb:9:in `new'
from /home/askar/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/rexml/parsers/treeparser.rb:9:in `initialize'
from /home/askar/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/rexml/document.rb:245:in `new'
from /home/askar/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/rexml/document.rb:245:in `build'
from /home/askar/.rvm/rubies/ruby-1.9.3-p429/lib/ruby/1.9.1/rexml/document.rb:43:in `initialize'
from import_xml.rb:20:in `new'
from import_xml.rb:20:in `block (2 levels) in <main>'
from import_xml.rb:17:in `foreach'
from import_xml.rb:17:in `block in <main>'
from import_xml.rb:8:in `chdir'
from import_xml.rb:8:in `<main>'
When I comment out:
#xmldoc = Document.new(xmlfile)
it's not giving errors.
Folder /home/askar/xml_files1 contains only 3 xml files.
I'm using Linux Mint Nadia and
ruby -v
ruby 1.9.3p429 (2013-05-15 revision 40747) [x86_64-linux]
If you noticed, for some reason, error shows ruby 1.9.1. Is this an issue?

Answer 1

I think #halfelf is correct here. The API docs say that Dir.foreach will iterate over every entry in the directory - and in Unix, that includes the two directories . and ...
A couple lines before your Dir.foreach call, you use glob to build an array of files called xml_files. What happens if you iterate over that in your loop instead?

Answer 2

Just a guess: Not everything returned by Dir.foreach(Dir.pwd) is a file that can be read. Some of them are directories.

Answer 3

Using Nokogiri, here's how I'd write this:
#!/usr/bin/ruby -w
require 'nokogiri'
DIRNAME = "/home/askar/xml_files1"
puts "Current directory is: #{ Dir.pwd }"
Dir.chdir(DIRNAME) do
puts "Now in: #{ DIRNAME }"
xml_files = Dir.glob("ShipmentRequest*.xml")
if xml_files.empty?
puts "#{ DIRNAME } is empty."
else
xml_files.each do |file|
doc = Nokogiri::XML(open(file))
# ... do something with the doc ...
end
end
end