Feature #16972: Pathname#mkpath to accept block to call on each created directory

• Status: Closed
• Assignee: akr (Akira Tanaka)
• Target version: -

[Dan0042 (Daniel DeLorme)]

I just had a case where I need to set the permissions on each directory created by Pathname#mkpath, but since this requires to know which directories are created I had to reimplement the mkpath logic like this:

file = Pathname.new(Dir.pwd) + "a/b/c/d/e/foo.txt"  #any of these directories may already exist

file.dirname.ascend.take_while{ |d| !d.exist? }.reverse_each do |dir|
  dir.mkdir
  dir.chmod(0775) #rwxrwxr-x
end

It occured to me it would be very elegant if mkpath allowed this

file.dirname.mkpath{ |dir| dir.chmod(0775) }

[nobu (Nobuyoshi Nakada)]

• Description updated (diff)
• Status changed from Open to Assigned
• Assignee set to akr (Akira Tanaka)

Pathname#mkpath is a wrapper of FileUtils.mkdir_p, and the latter has mode: argument to create intermediate directories.
So it would be simple and better to add the same option to Pathname#mkpath for this purpose, I think.
Or do you have any other use cases that this more generic solution is needed?

https://github.com/ruby/ruby/pull/3243

[Dan0042 (Daniel DeLorme)]

Thanks for the tip; all these years and I never realized FileUtils.mkdir_p had this mode: argument (and/or never realized what it was for).
I can imagine use cases for this generic solution: chown, chgrp, touch index.html
And in general I think it's better design to have generic/basic building blocks that can be combined in flexible ways.
But I have not personally experienced a need other than chmod, so for my case FileUtils.mkdir_p is enough.

[nobu (Nobuyoshi Nakada)]

• Status changed from Assigned to Closed

Applied in changeset git|2dd26bed86f721ed1982d00c3a0bd5ed37568e96.

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[Feature #16972] Add mode: option to Pathname#mkpath