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# @api private
class Puppet::Settings::IniFile
DEFAULT_SECTION_NAME = "main"
def self.update(config_fh, &block)
config = parse(config_fh)
manipulator = Manipulator.new(config)
yield manipulator
config.write(config_fh)
end
def self.parse(config_fh)
config = new([DefaultSection.new])
config_fh.each_line do |line|
case line.chomp
when /^(\s*)\[([[:word:]]+)\](\s*)$/
config.append(SectionLine.new($1, $2, $3))
when /^(\s*)([[:word:]]+)(\s*=\s*)(.*?)(\s*)$/
config.append(SettingLine.new($1, $2, $3, $4, $5))
else
config.append(Line.new(line))
end
end
config
end
def initialize(lines = [])
@lines = lines
end
def append(line)
line.previous = @lines.last
@lines << line
end
def delete(section, name)
delete_offset = @lines.index(setting(section, name))
next_offset = delete_offset + 1
if next_offset < @lines.length
@lines[next_offset].previous = @lines[delete_offset].previous
end
@lines.delete_at(delete_offset)
end
def insert_after(line, new_line)
new_line.previous = line
insertion_point = @lines.index(line)
@lines.insert(insertion_point + 1, new_line)
if @lines.length > insertion_point + 2
@lines[insertion_point + 2].previous = new_line
end
end
def section_lines
@lines.select { |line| line.is_a?(SectionLine) }
end
def section_line(name)
section_lines.find { |section| section.name == name }
end
def setting(section, name)
settings_in(lines_in(section)).find do |line|
line.name == name
end
end
def lines_in(section_name)
section_lines = []
current_section_name = DEFAULT_SECTION_NAME
@lines.each do |line|
if line.is_a?(SectionLine)
current_section_name = line.name
elsif current_section_name == section_name
section_lines << line
end
end
section_lines
end
def settings_in(lines)
lines.select { |line| line.is_a?(SettingLine) }
end
def settings_exist_in_default_section?
lines_in(DEFAULT_SECTION_NAME).any? { |line| line.is_a?(SettingLine) }
end
def section_exists_with_default_section_name?
section_lines.any? do |section|
!section.is_a?(DefaultSection) && section.name == DEFAULT_SECTION_NAME
end
end
def set_default_section_write_sectionline(value)
index = @lines.find_index { |line| line.is_a?(DefaultSection) }
if index
@lines[index].write_sectionline = true
end
end
def write(fh)
# If no real section line for the default section exists, configure the
# DefaultSection object to write its section line. (DefaultSection objects
# don't write the section line unless explicitly configured to do so)
if settings_exist_in_default_section? && !section_exists_with_default_section_name?
set_default_section_write_sectionline(true)
end
fh.truncate(0)
fh.rewind
@lines.each do |line|
line.write(fh)
end
fh.flush
end
class Manipulator
def initialize(config)
@config = config
end
def set(section, name, value)
setting = @config.setting(section, name)
if setting
setting.value = value
else
add_setting(section, name, value)
end
end
def delete(section_name, name)
setting = @config.setting(section_name, name)
if setting
@config.delete(section_name, name)
setting.to_s.chomp
end
end
private
def add_setting(section_name, name, value)
section = @config.section_line(section_name)
if section.nil?
previous_line = SectionLine.new("", section_name, "")
@config.append(previous_line)
else
previous_line = @config.settings_in(@config.lines_in(section_name)).last || section
end
@config.insert_after(previous_line, SettingLine.new("", name, " = ", value, ""))
end
end
module LineNumber
attr_accessor :previous
def line_number
line = 0
previous_line = previous
while previous_line
line += 1
previous_line = previous_line.previous
end
line
end
end
Line = Struct.new(:text) do
include LineNumber
def to_s
text
end
def write(fh)
fh.puts(to_s)
end
end
SettingLine = Struct.new(:prefix, :name, :infix, :value, :suffix) do
include LineNumber
def to_s
"#{prefix}#{name}#{infix}#{value}#{suffix}"
end
def write(fh)
fh.puts(to_s)
end
def ==(other)
super(other) && self.line_number == other.line_number
end
end
SectionLine = Struct.new(:prefix, :name, :suffix) do
include LineNumber
def to_s
"#{prefix}[#{name}]#{suffix}"
end
def write(fh)
fh.puts(to_s)
end
end
class DefaultSection < SectionLine
attr_accessor :write_sectionline
def initialize
@write_sectionline = false
super("", DEFAULT_SECTION_NAME, "")
end
def write(fh)
if @write_sectionline
super(fh)
end
end
end
end
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