I am trying to create a directory with the following code:
Dir.mkdir("/Users/Luigi/Desktop/Survey_Final/Archived/Survey/test") unless File.exists?("/Users/Luigi/Desktop/Survey_Final/Archived/Survey/test") However, I'm receiving this error:
No such file or directory - /Users/Luigi/Desktop/Survey_Final/Archived/Survey/test (Errno::ENOENT)
Why is this directory not being created by the Dir.mkdir statement above?
You are probably trying to create nested directories. Assuming foo does not exist, you will receive no such file or directory error for:
Dir.mkdir 'foo/bar' # => Errno::ENOENT: No such file or directory - 'foo/bar' To create nested directories at once, FileUtils is needed:
require 'fileutils' FileUtils.mkdir_p 'foo/bar' # => ["foo/bar"] Edit2: you do not have to use FileUtils, you may do system call (update from @mu is too short comment):
> system 'mkdir', '-p', 'foo/bar' # worse version: system 'mkdir -p "foo/bar"' => true But that seems (at least to me) as worse approach as you are using external 'tool' which may be unavailable on some systems (although I can hardly imagine system without mkdir, but who knows).
system 'mkdir', '-p', 'foo/bar' would be a better version of that system call. There's no need for an extra shell process or the usual quoting/escaping/injection nonsense that comes with the single argument version of system.system will launch /bin/sh to parse the mkdir -p "foo/bar" string and then the shell will run /bin/mkdir. So you're doing extra work (create the command string, launch /bin/sh to pull it apart again) and some of that extra work leaves you open to shell injection attacks (spend some time in the CERT advisories for Ruby and you'll see how common this problem is).
system call better than fileutils again? I'm on Windows and mkdir_p works just fine without spawning a subshell just to parse mkdir -p which would fail anyway. Glad that fileutils is the first alternative in the answer.fileutils or mkdir_p, all I'm saying is that system command, arg1, arg2, ... is better than system command_with_arguments.Simple way:
directory_name = "name" Dir.mkdir(directory_name) unless File.exist?(directory_name) Be aware of the potential for a race condition (time-of-check to time-of-use) which can be a security vulnerability.
Another simple way:
Dir.mkdir('tmp/excel') unless Dir.exist?('tmp/excel')
/home/jignesh/reports/test but using this solution raised RUBY (Errno::ENOENT), no such file or directory @ dir_s_mkdir. So the reliable solution is using FileUtils.mkdir_p
How about just Dir.mkdir('dir') rescue nil ?
rescue in its modifier form.
File.exists?()works on files and folders. It doesn't know the difference.