lib/chef/taste/changelog.rb
#
# Copyright (c) 2013 Kannan Manickam <me@arangamani.net>
#
# MIT License
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
require 'chef/taste'
module Chef
module Taste
# The Changelog class that computes the changelog if the current version
# being used and the latest version are different and the changelog is computable.
#
class Changelog
class << self
# Compute the changelog for the dependent cookbook if available
#
# @param dep [Dependency] the dependent cookbook
#
# @return [String] the goo.gl shortened URL for the changelog
#
def compute(dep)
# Skip dependent cookbook which has no source url
return '' if dep.source_url.nil?
# The source url is of the form https://HOSTING_PROVIDER/USER/REPO
matched = dep.source_url.match(%r(^(https?:\/\/)?(.*?)\/(.*?)\/(.*?)$))
changelog_url =
if matched[2] == 'github.com'
GithubChangelog.new("#{matched[3]}/#{matched[4]}", dep.version_used, dep.latest).compute
else
nil
end
Googl.shorten(changelog_url).short_url unless changelog_url.nil?
end
end
# The class for computing the changelog for cookbooks hosted in Github.
#
class GithubChangelog
# The Github repository
attr_reader :repo
# The version to compare from
attr_reader :from_version
# The version to compare to
attr_reader :to_version
# Constructor
#
# @param repo [String] the Github repo
# @param from_version [String] the version to compare from
# @param to_version [String] the version to compare to
#
# @return [GithubChangelog] the Github changelog object
#
def initialize(repo, from_version, to_version)
@repo = repo
@from_version = from_version
@to_version = to_version
end
# Computes the changelog URL for Github repositories
#
# @return [String] the computed changelog URL
#
def compute
tags = Octokit.tags(repo)
from_tag = nil
to_tag = nil
tags.each do |tag|
tag_name = tag.name
from_tag = tag_name if tag_name =~ /^v?#{from_version}$/
to_tag = tag_name if tag_name =~ /^v?#{to_version}$/
end
compare_url(from_tag, to_tag) if from_tag && to_tag
end
# Returns the compare URL for comparing two tags on Github
#
# @param from_tag [String] the tag to compare from
# @param to_tag [String] the tag to compare to
#
# @return [String] the Github URL to compare given two tags
#
def compare_url(from_tag, to_tag)
"https://github.com/#{repo}/compare/#{from_tag}...#{to_tag}"
end
end
end
end
end