class Chef::ChefFS::PathUtils
Public Class Methods
descendant_of?(path, ancestor)
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# File lib/chef/chef_fs/path_utils.rb, line 85 def self.descendant_of?(path, ancestor) path[0,ancestor.length] == ancestor && (ancestor.length == path.length || path[ancestor.length,1] =~ /#{PathUtils.regexp_path_separator}/) end
is_absolute?(path)
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# File lib/chef/chef_fs/path_utils.rb, line 90 def self.is_absolute?(path) path =~ /^#{regexp_path_separator}/ end
join(*parts)
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# File lib/chef/chef_fs/path_utils.rb, line 43 def self.join(*parts) return "" if parts.length == 0 # Determine if it started with a slash absolute = parts[0].length == 0 || parts[0].length > 0 && parts[0] =~ /^#{regexp_path_separator}/ # Remove leading and trailing slashes from each part so that the join will work (and the slash at the end will go away) parts = parts.map { |part| part.gsub(/^\/|\/$/, "") } # Don't join empty bits result = parts.select { |part| part != "" }.join("/") # Put the / back on absolute ? "/#{result}" : result end
realest_path(path)
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Given a path which may only be partly real (i.e. /x/y/z when only /x exists, or /x/y /blah when /x/y/z/blah exists), call File.realpath on the biggest part that actually exists.
If /x is a symlink to /blarghle, and has no subdirectories, then: ::realest_path('/x/y/z') == '/blarghle/y/z' ::realest_path('/x/ z') == '/blarghle /z' ::realest_path('/ y/z') == '/*/y/z'
# File lib/chef/chef_fs/path_utils.rb, line 71 def self.realest_path(path) path = Pathname.new(path) begin path.realpath.to_s rescue Errno::ENOENT dirname = path.dirname if dirname PathUtils.join(realest_path(dirname), path.basename.to_s) else path.to_s end end end
regexp_path_separator()
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# File lib/chef/chef_fs/path_utils.rb, line 59 def self.regexp_path_separator Chef::ChefFS::windows? ? '[\/\\]' : '/' end
relative_to(dest, source)
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If you are in 'source', this is what you would have to type to reach 'dest' ::relative_to('/a/b/c/d/e', '/a/b/x/y') == '../../c/d/e' ::relative_to('/a/b', '/a/b') == '.'
# File lib/chef/chef_fs/path_utils.rb, line 29 def self.relative_to(dest, source) # Skip past the common parts source_parts = Chef::ChefFS::PathUtils.split(source) dest_parts = Chef::ChefFS::PathUtils.split(dest) i = 0 until i >= source_parts.length || i >= dest_parts.length || source_parts[i] != dest_parts[i] i+=1 end # dot-dot up from 'source' to the common ancestor, then # descend to 'dest' from the common ancestor result = Chef::ChefFS::PathUtils.join(*(['..']*(source_parts.length-i) + dest_parts[i,dest.length-i])) result == '' ? '.' : result end
split(path)
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# File lib/chef/chef_fs/path_utils.rb, line 55 def self.split(path) path.split(Regexp.new(regexp_path_separator)) end