Class: Chef::Util::FileEdit

Inherits:
Object show all
Defined in:
lib/chef/util/file_edit.rb

Instance Method Summary collapse

Constructor Details

#initialize(filepath) ⇒ FileEdit

Returns a new instance of FileEdit.

Raises:

  • (ArgumentError) 


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# File 'lib/chef/util/file_edit.rb', line 31

def initialize(filepath)
	@original_pathname = filepath
	@file_edited = false
	
	raise ArgumentError, "File doesn't exist" unless File.exist? @original_pathname
	raise ArgumentError, "File is blank" unless (@contents = File.new(@original_pathname).readlines).length > 0
end

Instance Method Details

#insert_line_after_match(regex, newline) ⇒ Object

search the file line by line and match each line with the given regex if matched, insert newline after each matching line



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# File 'lib/chef/util/file_edit.rb', line 65

def insert_line_after_match(regex, newline)
	search_match(regex, newline, 'i', 0)
end

#search_file_delete(regex) ⇒ Object

search the file line by line and match each line with the given regex if matched, delete the match (all occurances) from the line



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# File 'lib/chef/util/file_edit.rb', line 59

def search_file_delete(regex)
	search_match(regex, " ", 'd', 2)
end

#search_file_delete_line(regex) ⇒ Object

search the file line by line and match each line with the given regex if matched, delete the line



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# File 'lib/chef/util/file_edit.rb', line 53

def search_file_delete_line(regex)
	search_match(regex, " ", 'd', 1)
end

#search_file_replace(regex, replace) ⇒ Object

search the file line by line and match each line with the given regex if matched, replace the match (all occurances) with the replace parameter



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# File 'lib/chef/util/file_edit.rb', line 47

def search_file_replace(regex, replace)
	search_match(regex, replace, 'r', 2)
end

#search_file_replace_line(regex, newline) ⇒ Object

search the file line by line and match each line with the given regex if matched, replace the whole line with newline.



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# File 'lib/chef/util/file_edit.rb', line 41

def search_file_replace_line(regex, newline)
	search_match(regex, newline, 'r', 1)
end

#write_file ⇒ Object

Make a copy of old_file and write new file out (only if file changed)



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# File 'lib/chef/util/file_edit.rb', line 70

def write_file
	
	# file_edited is false when there was no match in the whole file and thus no contents have changed.
    if file_edited
      backup_pathname = original_pathname + ".old"
      FileUtils.cp(original_pathname, backup_pathname, :preserve => true)
      File.open(original_pathname, "w") do |newfile|
        contents.each do |line|
          newfile.puts(line)
        end
        newfile.flush
      end
    end
    self.file_edited = false
end