[ruby] Ruby's File.open gives "No such file or directory - text.txt (Errno::ENOENT)" error

I installed Ruby 1.9.2 on my Win 7 machine. Created a simple analyzer.rb file. It has this one line:

File.open("text.txt").each {|line| puts line}

When I run the code, it gives me this error:

analyzer.rb:1:in `initialize': No such file or directory - text.txt (Errno::ENOENT)
from analyzer.rb:1:in `open'
from analyzer.rb:1:in `<main>'
Exit code: 1

I don't get it. There is a text.txt file in the same directory as the analyzer.rb file. I also tried feeding the absolute path of the file, C:\Ruby192\text.txt, but no dice. What am I missing?

Next to being in the wrong directory I just tripped about another variant:

I had a File.open(my_file).each {|line| puts line} exploding but there was something by that name in the directory I was working in (ls in the command line showed the name). I checked with a File.exists?(my_file) which strangely returned false. Explanation: my_file was a symlink which target didn't exist anymore! Since File.exists? will follow a symlink it will say false though the link is still there.

ENOENT means it's not there.

Just update your code to:

File.open(File.dirname(__FILE__) + '/text.txt').each {|line| puts line}

Ditto Casper's answer:

puts Dir.pwd

As soon as you know current working directory, specify the file path relatively to that directory.

For example, if your working directory is project root, you can open a file under it directly like this

json_file = File.read(myfile.json)

Try using

Dir.glob(".") 

To see what's in the directory (and therefore what directory it's looking at).

Please use chomp() or chomp() with STDIN

i.e. test1.rb

print 'Enter File name: '

fname = STDIN.gets.chomp()  # or fname = gets.chomp()


fname_read = File.open(fname)

puts fname_read.read()