ruby 将一个目录的内容复制到另一个目录
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Copy contents of one directory to another
提问by Phrogz
Using Ruby, how can I copy the contentsof one directory to another? For example, given (non-empty) directories A and B:
使用 Ruby，如何将一个目录的内容复制到另一个目录？例如，给定（非空）目录 A 和 B：
A/
bar
foo
B/
jam
jim
I want to copy everything from A into B, resulting in:
我想将所有内容从 A 复制到 B，结果是：
A/
bar
foo
B/
bar
foo
jam
jim
I cannot use FileUtils.cp_rbecause it copies the directory itself:
我无法使用，FileUtils.cp_r因为它复制了目录本身：
irb(main):001:0> require 'fileutils'
#=> true
irb(main):002:0> Dir['**/*']
#=> ["A", "A/bar", "A/foo", "B", "B/jam", "B/jim"]
irb(main):003:0> FileUtils.cp_r('A','B')
#=> nil
irb(main):004:0> Dir['**/*']
#=> ["A", "A/bar", "A/foo", "B", "B/A", "B/A/bar", "B/A/foo", "B/jam", "B/jim"]
Is there a better (shorter, more efficient) answer than the following?
是否有比以下更好（更短、更有效）的答案？
Dir['A/*'].each{ |f| FileUtils.cp(f,"B") }
回答by thelostspore
Using FileUtil's cp_rmethod, simply add /.at end of the source directory parameter.
使用 FileUtil 的cp_r方法，只需/.在源目录参数的末尾添加。
Example from Ruby doc below. Assumes a current working directory with src & dest directories.
下面来自 Ruby 文档的示例。假设当前工作目录包含 src 和 dest 目录。
FileUtils.cp_r 'src/.', 'dest'
http://www.ruby-doc.org/stdlib-1.9.3/libdoc/fileutils/rdoc/FileUtils.html#method-c-cp_r
http://www.ruby-doc.org/stdlib-1.9.3/libdoc/fileutils/rdoc/FileUtils.html#method-c-cp_r
回答by Casual Coder
Try:
尝试：
FileUtils.cp_r(Dir['A/*'],'B')
回答by bta
When using FileUtils.cp_r, be aware that the first argument can also be a list of files. Try something like:
使用时FileUtils.cp_r，请注意第一个参数也可以是文件列表。尝试类似：
FileUtils.cp_r(Dir.glob('A/*'), 'B')
