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#!/usr/bin/ruby
=begin rdoc
This is a small helper script for keeping changelogs up to date.
It is copyright 2006 by Vincent Fourmond, and can be distributed under
the terms of the General Public License version 2.
=end
require 'tempfile'
# we need a decent parsing of command-line here...
# it is provided by optparse, which is quite cool...
require 'optparse'
require 'ostruct'
require 'etc'
# A class to describe and parse a changelog line
class CLLine
# The text of the line:
attr_accessor :line
# The type of the line:
# * :version (i.e. mkmf2 -- 0.1.2)
# * :blank
# * :name (describing the name [...])
# * :entry ( starting with ' * ')
# * :entry_cont (starting with enough blank space)
# * :sig (signature)
attr_accessor :kind
# Hash that can be used to store interesting informations.
attr_accessor :data
def initialize(line = "")
@line = line
@data = {}
# we parse the line here.
case line
when /^\s*(\w+)\s+\(\s*([\w.-]+)\s*\)\s*(?:\w+\s*)?$/
# this is a version line
@kind = :version
@data["package"] = $1
@data["version"] = $2
when /^\s+\*/
@kind = :entry
when /^\s*$/
@kind = :blank
when /^\s*\[\s*([^\]]+?)\s*\]/
@kind = :name
@data["name"] = $1
when /^\s--\s*((.*?)\s*<(.*)>)[\s,]\s([^<>]*?)\s*$/
@kind = :sig
@data["full name"] = $1
@data["name"] = $2
@data["email"] = $3
@data["date"] = $4
when /^\s\s+\S+/
@kind = :entry_cont
end
end
# A small wrapper around the data structure...
def [](str)
return @data[str]
end
# Changes the current entry into a proper signature...
def sign(email,date)
@kind = :sig
@line = " -- #{email} #{date}"
@data["full name"] = email
@data["date"] = date.chomp
if @data["full name"] =~ /^(.*?)\s*<(.*)>/
@data["name"] = $1
@data["email"] = $2
else
# we take the email address for the name
@data["name"] = @data["full name"]
end
end
end
# An section consists of a version, entries and a signature
class CLSection
# The CLLine object containing the version
attr_accessor :version
# The siganture
attr_accessor :signature
# The rest inbetween
attr_accessor :entries
# The names of the differents contributors. It is a hash where to a
# name corresponds the CLLine object where it is found.
attr_accessor :contributors
# This function takes an array of CLLines, removes blank lines
# then, takes everything between a version and a signature, removing them from
# the array. You'd better make a copy of the array if you need it otherwise.
def initialize(cllines)
# Stripping trailing blank lines.
while cllines[0] && cllines[0].kind == :blank
cllines.shift
end
if cllines[0].kind != :version
raise "Error parsing the changelog: version line expected, but got " +
cllines[0].inspect
end
@version = cllines.shift
@entries = []
@contributors = {}
while cllines[0].kind != :sig
@entries.push cllines.shift
if @entries.last.kind == :name
@contributors[@entries.last["name"]] = @entries.last
end
end
@signature = cllines.shift
# and removing all the blank lines after, to make sure nothing is left
# in the array if it is the end of the changelog.
while cllines[0] && cllines[0].kind == :blank
cllines.shift
end
end
# returns an array with the text lines of the section
def lines
lines = []
lines << @version.line
lines += @entries.collect { |e|
e.line
}
lines << @signature.line
end
# Returns the text for the section.
def to_s
return lines.join('')
end
def email_to_name(email)
email =~ /^\s*(.*?)\s*<(.*)>/
return $1
end
# returns the CLLine object corresponding to the last :entry of
# a contributor. You need to provide it's short name
def last_contributor_entry(name)
if ! @contributors.key?(name)
if name == sig_name
return last_entry
else
return nil
end
end
index = @entries.index(@contributors[name]) + 1
last = nil
while @entries[index] and @entries[index].kind == :blank
last = @entries[index]
index += 1
end
while @entries[index] and
(@entries[index].kind == :entry or
@entries[index].kind == :entry_cont)
last = @entries[index]
index += 1
end
# it can be the blank just after the name.
return last
end
def last_entry
entries = @entries.dup
while a = entries.pop
return a unless a.kind == :blank
end
return nil
end
def sig_name
return @signature["name"]
end
# adds a contributor to the list, and make the corresponding entries
def add_contributor(name)
return if @contributors.key?(name)
@contributors[name] = CLLine.new(" [#{name}]\n")
# we add the contributor at the end:
@entries.push @contributors[name]
@entries.push CLLine.new("\n")
end
# This functions adds a new entry to the section, with the given
# contributor name and returns an array containing:
# * the line number where the entry was added
# * an array containing the text lines
#
# The contributor name should include full email
def add_entry(contributor, entry = "")
# nil = ""
if entry.nil?
entry = ""
end
# we check if we need to add contributors name or not:
name = email_to_name(contributor)
new_entry = CLLine.new(" * #{entry}\n")
if name != sig_name
add_sig_name
add_contributor(name)
end
last_entry_index = @entries.index(last_contributor_entry(name))
# raise "Problem parsing the changelog ??" if last_entry_index.nil?
# no, this is not right: we want to be able to deal with almost empty
# Changelogs -- namely, the ones created by this very program ;-) !
if last_entry_index.nil?
last_entry_index = -1
# we add an initial \n:
new_entry.line = "\n#{new_entry.line}"
end
@entries[last_entry_index + 1, 0] = new_entry
# last thing: we need to update the signature:
@signature.sign(contributor, CLFile.date)
return [@entries.index(new_entry) + 2, lines]
end
# Adds a name entry in the beginning with the name of the signature
def add_sig_name
return if @contributors.key?(sig_name)
@contributors[sig_name] =
CLLine.new(" [#{sig_name}]\n")
@entries.unshift @contributors[sig_name]
@entries.unshift CLLine.new("\n")
end
# normalize makes sure that the entries start and end with a blank line, and
# that there are never more than one blank line in a row
def normalize
# to be written...
end
end
# The class describing the Changelog file.
class CLFile
# The lines of the file
attr_accessor :lines
# The sections of the file
attr_accessor :sections
# returns the date in the wanted format...
def CLFile.date
return `date`
end
# file can be either an IO object or a file name.
def initialize(file)
if file.is_a? String
file = File.open(file)
end
@lines = []
for line in file
@lines << CLLine.new(line)
end
@sections = []
# we make a copy to feed it to CLSection
lines = @lines.dup
while lines.length > 0
@sections.push CLSection.new(lines)
end
end
def latest_version
return @sections[0].version["version"]
end
# Creates a release of the given directory by parsing the changelog and
# creating an appropriately named archive. The directory name will be
# changed to match the _package_-_version_ convention.
#
# As is, it probably shouldn't be used directly, but rather through
# a slightly more advanced interface.
def CLFile.make_release(dir, changelog = "Changelog")
base_dir = File.dirname(dir)
ch = CLFile.new(File.join(dir, changelog))
target_name = "#{ch.package_name}-#{ch.latest_version}"
# First, we rename the directory to the correct name
File.rename(dir, File.join(base_dir, target_name))
# Then, we make an archive out of it:
cmd = "cd #{base_dir}; tar cvzf #{target_name}.tar.gz #{target_name}"
system cmd
# and that's done !!!
target_name
end
# This convenience function does the following:
# * exports the given module from the given repository with the given tag
# * looks for a Changelog file in it
# * calls make_release
# * and erases the exported directory
def CLFile.cvs_release(mod, tag, rep = nil, changelog = "Changelog")
# we first make up a temporary directory name...
export_dir = "biniou-temp"
cmd = "cvs " + if rep
" -d #{rep} "
else
""
end +
"export -d #{export_dir} -r #{tag} #{mod}"
puts cmd
system cmd
tg = make_release(File.join(Dir::pwd, export_dir),
changelog)
end
# Increases a version number and returns it
def CLFile.increase_version(version)
return version.sub(/(\w+)\W*$/) do |str|
str.succ
end
end
def increase_version
return CLFile.increase_version(latest_version)
end
def package_name
return @sections[0].version["package"]
end
# This is the most interesting function: it adds a new entry, or prompts
# the user for it (via an external text editor). If version is :increase
# then the latest version is taken and increased automatically. The output
# is written to the file specified by target_file (which has to be an IO
# object -- and a real file in case of user interaction).
# This function returns true if the provided file has been modified in a
# reasonable way (that is: either we provided text, or the user did actually
# modify the file)
def add_new_entry(target_file,email,
version = nil, entry = nil,
editor = "nano",
verbose = false,
editor_line_syntax = "+%d")
if version.nil? or version == latest_version
line_number, lines = @sections[0].add_entry(email, entry)
text = lines.join('') + "\n" +
@sections[1..@sections.size - 1].collect do |v|
v.to_s
end.join("\n")
else
if version == :increase
version = increase_version
end
text = CLFile.create_new(email, version,
package_name,if entry
entry
else
""
end
) +
@sections.collect do |v|
v.to_s
end.join("\n")
line_number = 3
end
# now, text is the text of the changelog, and line_number
# the number of the line which the user should edit
target_file.print text
target_file.close
# closing the file so that its contents appear on
# the hard drive...
if(entry.nil?)
# interactive edition
time_before = File::mtime(target_file.path)
line_number_spec = sprintf(editor_line_syntax, line_number)
cmd = "#{editor} #{line_number_spec} #{target_file.path}"
puts cmd if verbose
system cmd
time_after = File::mtime(target_file.path)
return time_before < time_after
end
return true
end
# Creates a new changelog from scratch and writes it to filename,
# or returns the corresponding string.
def CLFile.create_new(email, version, package,
entry = nil,
filename = nil)
contents = "#{package} (#{version})\n\n" + if entry
" * #{entry}\n\n"
else
""
end +
" -- #{email} #{CLFile.date}\n"
if filename
File.open(filename, "w") do |f|
f.print contents
end
end
return contents
end
end
# new generic structure:
options = OpenStruct.new
options.version = nil
if ENV.has_key? "RCH_EMAIL"
options.email = ENV["RCH_EMAIL"]
else
# Try to make up something from the etc gecos field
# and the environment variable EMAIL (or username@hostname if not defined)
email = ""
if ENV.has_key? "EMAIL"
email = ENV["EMAIL"]
else
# Make up one email, not nice-looking, but not too bad.
email = "#{Etc.getpwuid.name}@localhost"
end
options.email = "#{Etc.getpwuid.gecos.split(',')[0]} <#{email}>"
end
options.package = nil
# The editor
if ENV.has_key? "EDITOR"
options.editor = ENV["EDITOR"]
else
options.editor = "nano" # nano by default
end
# The editor's specification for a command-line
if ENV.has_key? "EDITOR_LINE_SPEC"
options.editor_line_spec = ENV["EDITOR_LINE_SPEC"]
else
options.editor_line_spec = "+%d" # works for nano, and for others as well
end
options.verbose = false
opts = OptionParser.new do |opts|
opts.banner = "$0 [options]"
opts.on("--version VERSION",
"Create a new entry for the version VERSION") do |version|
puts "Got version #{version}"
options.version = version
end
opts.on("-e","--entry ENTRY",
"Adds the entry ENTRY without prompting the user") do |entry|
options.entry = entry
end
opts.on("-i","--increase",
"Increase automatically the version number") do
options.version = :increase
end
opts.on("--email EMAIL",
"Sets the full email address to EMAIL") do |email|
options.email = email
end
opts.on("-p","--package PACKAGE",
"Sets the package name to PACKAGE") do |package|
options.package = package
end
opts.on("-c","--create",
"Creates a brand new changelog. Version and package " +
"have to be specified") do
options.create = true
end
opts.on("--editor EDITOR",
"Specifies your default editor for editing the changelog") do |e|
options.editor = e
end
opts.on("--line_spec SPEC",
"How rch should tell the editor which line to edit" +
" (like for sprintf)") do |l|
options.editor_line_spec = l
end
opts.on("--release",
"Make an archive of the current directory, and name it " +
" according to the changelog.") do
options.release = true
end
opts.on("--cvs MODULE",
"Does a cvs release -- you need to specify a " +
"tag and maybe a repository") do |mod|
options.cvs_release = true
options.module = mod
end
opts.on("--cvs-tag TAG",
"Does a cvs release") do |tag|
options.tag = tag
end
opts.on("-v","--verbose",
"Prints out a command before executing it") do
options.verbose = true
end
opts.on("--repository REP",
"Chooses the repository REP for --cvs") do |rep|
options.repository = rep
end
opts.on("--print-version",
"Only prints the latest version of the package and exit") do |rep|
options.print_version = rep
end
end
opts.parse!
file = "Changelog"
if $*[0]
file = $*[0]
end
if options.create
if options.version && options.package
CLFile.create_new(options.email, options.version,
options.package,nil,file)
else
puts "You should specify a package name and a version"
end
elsif options.cvs_release
CLFile.cvs_release(options.module, options.tag,
options.repository,
file)
elsif options.release
CLFile.make_release(Dir.pwd, file)
else
cl = CLFile.new(file)
if options.print_version
print cl.latest_version
exit
end
# basic changelog addition:
temp_file = Tempfile.new('rch_changelog')
if cl.add_new_entry(temp_file, options.email,
options.version, options.entry,
options.editor, options.verbose,
options.editor_line_spec)
cmd = "cp '#{temp_file.path}' '#{file}'"
puts cmd if options.verbose
system cmd
end
end
|