End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
class method
File.dirname
File.dirname(file_name) → dir_name
file.c
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static VALUE
rb_file_s_dirname(VALUE klass, VALUE fname)
{
return rb_file_dirname(fname);
}
Returns all components of the filename given in file_name except the last one (after first stripping trailing separators). The filename can be formed using both File::SEPARATOR and File::ALT_SEPARATOR as the separator when File::ALT_SEPARATOR is not nil.
Example
File.dirname("/home/gumby/work/ruby.rb") #=> "/home/gumby/work"