Class: RDoc::Parser::ChangeLog

Inherits:
RDoc::Parser show all
Includes:
Text
Defined in:
lib/rdoc/parser/changelog.rb

Overview

A ChangeLog file parser.

This parser converts a ChangeLog into an RDoc::Markup::Document. When viewed as HTML a ChangeLog page will have an entry for each day’s entries in the sidebar table of contents.

This parser is meant to parse the MRI ChangeLog, but can be used to parse any GNU style Change Log.

Instance Attribute Summary

Attributes inherited from RDoc::Parser

#file_name

Instance Method Summary collapse

Methods inherited from RDoc::Parser

alias_extension, binary?, can_parse, can_parse_by_name, check_modeline, for, #initialize, parse_files_matching, remove_modeline, use_markup, zip?

Constructor Details

This class inherits a constructor from RDoc::Parser

Instance Method Details

#continue_entry_body(entry_body, continuation) ⇒ Object

Attaches the continuation of the previous line to the entry_body.

Continued function listings are joined together as a single entry. Continued descriptions are joined to make a single paragraph.



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# File 'lib/rdoc/parser/changelog.rb', line 27

def continue_entry_body entry_body, continuation
  return unless last = entry_body.last

  if last =~ /\)\s*\z/ and continuation =~ /\A\(/ then
    last.sub!(/\)\s*\z/, ',')
    continuation = continuation.sub(/\A\(/, '')
  end

  if last =~ /\s\z/ then
    last << continuation
  else
    last << ' ' + continuation
  end
end

#create_document(groups) ⇒ Object

Creates an RDoc::Markup::Document given the groups of ChangeLog entries.



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# File 'lib/rdoc/parser/changelog.rb', line 45

def create_document groups
  doc = RDoc::Markup::Document.new
  doc.omit_headings_below = 2
  doc.file = @top_level

  doc << RDoc::Markup::Heading.new(1, File.basename(@file_name))
  doc << RDoc::Markup::BlankLine.new

  groups.sort_by do |day,| day end.reverse_each do |day, entries|
    doc << RDoc::Markup::Heading.new(2, day.dup)
    doc << RDoc::Markup::BlankLine.new

    doc.concat create_entries entries
  end

  doc
end

#create_entries(entries) ⇒ Object

Returns a list of ChangeLog entries an RDoc::Markup nodes for the given entries.



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# File 'lib/rdoc/parser/changelog.rb', line 67

def create_entries entries
  out = []

  entries.each do |entry, items|
    out << RDoc::Markup::Heading.new(3, entry)
    out << RDoc::Markup::BlankLine.new

    out << create_items(items)
  end

  out
end

#create_items(items) ⇒ Object

Returns an RDoc::Markup::List containing the given items in the ChangeLog



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# File 'lib/rdoc/parser/changelog.rb', line 84

def create_items items
  list = RDoc::Markup::List.new :NOTE

  items.each do |item|
    item =~ /\A(.*?(?:\([^)]+\))?):\s*/

    title = $1
    body = $'

    paragraph = RDoc::Markup::Paragraph.new body
    list_item = RDoc::Markup::ListItem.new title, paragraph
    list << list_item
  end

  list
end

#group_entries(entries) ⇒ Object

Groups entries by date.



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# File 'lib/rdoc/parser/changelog.rb', line 104

def group_entries entries
  @time_cache ||= {}
  entries.group_by do |title, _|
    begin
      time = @time_cache[title]
      (time || Time.parse(title)).strftime '%Y-%m-%d'
    rescue NoMethodError, ArgumentError
      time, = title.split '  ', 2
      Time.parse(time).strftime '%Y-%m-%d'
    end
  end
end

#parse_entries ⇒ Object

Parses the entries in the ChangeLog.

Returns an Array of each ChangeLog entry in order of parsing.

A ChangeLog entry is an Array containing the ChangeLog title (date and committer) and an Array of ChangeLog items (file and function changed with description).

An example result would be:

[ 'Tue Dec  4 08:33:46 2012  Eric Hodel  <[email protected]>',
  [ 'README.EXT:  Converted to RDoc format',
    'README.EXT.ja:  ditto']]



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# File 'lib/rdoc/parser/changelog.rb', line 132

def parse_entries
  @time_cache ||= {}
  entries = []
  entry_name = nil
  entry_body = []

  @content.each_line do |line|
    case line
    when /^\s*$/ then
      next
    when /^\w.*/ then
      entries << [entry_name, entry_body] if entry_name

      entry_name = $&

      begin
        time = Time.parse entry_name
        @time_cache[entry_name] = time
        # HACK Ruby 1.8 does not raise ArgumentError for Time.parse "Other"
        entry_name = nil unless entry_name =~ /#{time.year}/
      rescue NoMethodError
        # HACK Ruby 2.1.2 and earlier raises NoMethodError if time part is absent
        entry_name.split '  ', 2
      rescue ArgumentError
        if /out of range/ =~ $!.message
          Time.parse(entry_name.split('  ', 2)[0]) rescue entry_name = nil
        else
          entry_name = nil
        end
      end

      entry_body = []
    when /^(\t| {8})?\*\s*(.*)/ then # "\t* file.c (func): ..."
      entry_body << $2.dup
    when /^(\t| {8})?\s*(\(.*)/ then # "\t(func): ..."
      entry = $2

      if entry_body.last =~ /:/ then
        entry_body << entry.dup
      else
        continue_entry_body entry_body, entry
      end
    when /^(\t| {8})?\s*(.*)/ then
      continue_entry_body entry_body, $2
    end
  end

  entries << [entry_name, entry_body] if entry_name

  entries.reject! do |(entry,_)|
    entry == nil
  end

  entries
end

#scan ⇒ Object

Converts the ChangeLog into an RDoc::Markup::Document



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# File 'lib/rdoc/parser/changelog.rb', line 191

def scan
  @time_cache = {}
  entries = parse_entries
  grouped_entries = group_entries entries

  doc = create_document grouped_entries

  @top_level.comment = doc

  @top_level
end