Class: Chef::Util::FileEdit

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

Instance Method Summary (collapse)

Constructor Details

- (FileEdit) initialize(filepath)

Returns a new instance of FileEdit

Raises:

  • (ArgumentError)


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

def initialize(filepath)
  raise ArgumentError, "File '#{filepath}' does not exist" unless File.exist?(filepath)
  @editor = Editor.new(File.open(filepath, &:readlines))
  @original_pathname = filepath
  @file_edited = false
end

Instance Method Details

- (Boolean) file_edited?

return if file has been edited



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# File 'lib/chef/util/file_edit.rb', line 39

def file_edited?
  @file_edited
end

- (Object) insert_line_after_match(regex, newline)

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 69

def insert_line_after_match(regex, newline)
  @changes = (editor.append_line_after(regex, newline) > 0) || @changes
end

- (Object) insert_line_if_no_match(regex, newline)

search the file line by line and match each line with the given regex if not matched, insert newline at the end of the file



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# File 'lib/chef/util/file_edit.rb', line 75

def insert_line_if_no_match(regex, newline)
  @changes = (editor.append_line_if_missing(regex, newline) > 0) || @changes
end

- (Object) search_file_delete(regex)

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 63

def search_file_delete(regex)
  search_file_replace(regex, '')
end

- (Object) search_file_delete_line(regex)

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 57

def search_file_delete_line(regex)
  @changes = (editor.remove_lines(regex) > 0) || @changes
end

- (Object) search_file_replace(regex, replace)

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 51

def search_file_replace(regex, replace)
  @changes = (editor.replace(regex, replace) > 0) || @changes
end

- (Object) search_file_replace_line(regex, newline)

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 45

def search_file_replace_line(regex, newline)
  @changes = (editor.replace_lines(regex, newline) > 0) || @changes
end

- (Boolean) unwritten_changes?



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# File 'lib/chef/util/file_edit.rb', line 79

def unwritten_changes?
  !!@changes
end

- (Object) write_file

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 84

def write_file
  if @changes
    backup_pathname = original_pathname + ".old"
    FileUtils.cp(original_pathname, backup_pathname, :preserve => true)
    File.open(original_pathname, "w") do |newfile|
      editor.lines.each do |line|
        newfile.puts(line)
      end
      newfile.flush
    end
    @file_edited = true
  end
  @changes = false
end