将文件的内容传递给FileUtils.cp

Question

file = 'list.txt' 
fileArray = [] 

list_open = File.open(file, "r") 
list_open.each_line { |line| 
    fileArray.push line 
} 

fileArray.each { |x| puts x } 
fileArray.each { |x| FileUtils.cp x, "/home/user/scripts/" } 

lists.txt的内容只是文件的路径。我想从文件中读取并将其传递到cp并将其复制到/home/user/scripts/。

当我运行此脚本，这是我收到的错误：

/usr/local/lib/ruby/2.1/fileutils.rb:1401:in `initialize': No such file or directory @ rb_sysopen - /home/user/test.txt (Errno::ENOENT) 
from /usr/local/lib/ruby/2.1/fileutils.rb:1401:in `open' 
from /usr/local/lib/ruby/2.1/fileutils.rb:1401:in `copy_file' 
from /usr/local/lib/ruby/2.1/fileutils.rb:483:in `copy_file' 
from /usr/local/lib/ruby/2.1/fileutils.rb:400:in `block in cp' 
from /usr/local/lib/ruby/2.1/fileutils.rb:1579:in `block in fu_each_src_dest' 
from /usr/local/lib/ruby/2.1/fileutils.rb:1593:in `fu_each_src_dest0' 
from /usr/local/lib/ruby/2.1/fileutils.rb:1577:in `fu_each_src_dest' 
from /usr/local/lib/ruby/2.1/fileutils.rb:399:in `cp' 
from ./for_Test.rb:12:in `block in <main>' 
from ./for_Test.rb:12:in `each' 
from ./for_Test.rb:12:in `<main>' 

Answer 1

回想一下，在一个文件中的每一行必须与一个换行符（"\n"）结束。您需要将其删除，这是很容易与String#chomp：

list_path = "list.txt" 
filenames = [] 

File.open(list_path, "r") do |list| 
    list.each_line do |line| 
    filenames.push(line.chomp) 
    end 
end 

...或更简洁：

filenames = File.open(list_path, "r") do |list| 
    list.each_line.map(&:chomp) 
end