检查文件是否存在，存在则删除

Question

我的问题是：我想检查/tmp文件夹中是否存在文件，并在重新开始下载前删除它。

这是我的代码（木偶）：

exec { 'Download mediawiki to temp':
  cwd     => '/tmp',
  command => '/usr/bin/wget https://releases.wikimedia.org/mediawiki/1.27/mediawiki-1.27.1.tar.gz',    
}

Answer 1

您可能想要这样做...

# local vars for readability
$theurl       = 'https://releases.wikimedia.org/mediawiki/1.27'
$tarball      = 'mediawiki-1.27.1.tar.gz'
$wget_command = "/usr/bin/wget $theurl/$tarball"
$rm_command   = "/bin/rm -f /tmp/$tarball"

exec { 'Delete mediawiki from temp':
    cwd     => '/tmp',
    command => $rm_command,
}-> 
exec { 'Download mediawiki to temp':
    cwd     => '/tmp',
    command => $wget_command,
    creates => "/tmp/$tarball",
}

见https://docs.puppet.com/puppet/latest/reference/types/exec.html and https://docs.puppet.com/puppet/latest/reference/lang_relationships.html

检查文件是否存在，存在则删除

Check if file exists and delete it if it exists

puppet