From 8504f9b69b08b93427a5173ea5eb96593d4c0ecb Mon Sep 17 00:00:00 2001
From: Matt Palmer <mpalmer@hezmatt.org>
Date: Tue, 6 May 2014 15:43:27 +1000
Subject: [PATCH] Initial commit

---
 .gitignore             |   3 +
 Gemfile                |   3 +
 README.md              |  80 ++++++++++++++++++++++++
 Rakefile               |  20 ++++++
 bin/git-release        |   5 ++
 github-release.gemspec |  25 ++++++++
 lib/github-release.rb  | 135 +++++++++++++++++++++++++++++++++++++++++
 7 files changed, 271 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Gemfile
 create mode 100644 README.md
 create mode 100644 Rakefile
 create mode 100755 bin/git-release
 create mode 100644 github-release.gemspec
 create mode 100644 lib/github-release.rb

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..47151fd
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+pkg/
+.bundle/
+Gemfile.lock
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..e088013
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,3 @@
+source 'https://rubygems.org/'
+
+gemspec
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..7531a55
--- /dev/null
+++ b/README.md
@@ -0,0 +1,80 @@
+This very simple gem provides a `git release` command, which will
+automatically fill out any and all "release tags" into fully-blown "Github
+Releases", complete with release notes, a heading, and all the other good
+things in life.
+
+Using this gem, you can turn the following tag annotation:
+
+    First Release
+
+    It is with much fanfare and blowing of horns that I bequeath the
+    awesomeness of `git release` upon the world.
+
+    Features in this release include:
+
+     * Ability to create a release from a tag annotation or commit message;
+     * Automatically generates an OAuth token if needed;
+     * Feeds your cat while you're hacking(*)
+
+    You should install it now!  `gem install github-release`
+
+Into [this](https://github.com/mpalmer/github-release/releases/tag/v0.1.0)
+simply by running
+
+    git release
+
+
+# Installation
+
+Simply install the gem:
+
+    gem install github-release
+
+
+# Usage
+
+Using `git release` is very simple.  Just make sure that your `origin`
+remote points to your Github repo, and then run `git release`.  All tags
+that look like a "version tag" (see "Configuration", below) will be created
+as Github releases (if they don't already exist) and the message from the
+tag will be used as the release notes.
+
+The format of the release notes is quite straightforward -- the first line
+of the message associated with the commit will be used as the "name" of the
+release, with the rest of the message used as the "body" of the release.
+The body will be interpreted as Github-flavoured markdown, so if you'd like
+to get fancy, go for your life.
+
+The message associated with the "release tag" is either the tag's annotation
+message (if it is an annotated tag) or else the commit log of the commit on
+which the tag is placed.  I *strongly* recommend annotated tags (but then
+again, [I'm biased...](http://theshed.hezmatt.org/git-version-bump))
+
+The first time you use `git release`, it will ask you for your Github
+username and password.  This is used to request an OAuth token to talk to
+the Github API, which is then stored in your global git config.  Hence you
+*shouldn't* be asked for your credentials every time you use `git release`.
+If you need to use multiple github accounts for different repos, you can
+override the `release.api-token` config parameter in your repo configuration
+(but you'll have to get your own OAuth token).
+
+
+# Configuration
+
+There are a few things you can configure to make `git release` work slightly
+differently.  None of them should be required for normal, sane use.
+
+ * `release.remote` (default `origin`) -- The name of the remote which is
+   used to determine what github repository to send release notes to.
+
+ * `release.api-token` (default is runtime generated) -- The OAuth token
+   to use to authenticate access to the Github API.  When you first run `git
+   release`, you'll be prompted for a username and password to use to
+   generate an initial token; if you need to override it on a per-repo
+   basis, this is the key you'll use.
+
+ * `release.tag-regex` (default `v\d+\.\d+(\.\d+)?$`) -- The regular
+   expression to filter which tags denote releases, as opposed to other tags
+   you might have decided to make.  Only tags which match this regular
+   expression will be pushed up by `git release`, and only those tags will
+   be marked as releases.
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..c3adc7b
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,20 @@
+require 'rubygems'
+require 'bundler'
+
+begin
+	Bundler.setup(:default, :development)
+rescue Bundler::BundlerError => e
+	$stderr.puts e.message
+	$stderr.puts "Run `bundle install` to install missing gems"
+	exit e.status_code
+end
+
+Bundler::GemHelper.install_tasks
+
+require 'rdoc/task'
+
+Rake::RDocTask.new do |rd|
+	rd.main = "README.md"
+	rd.title = 'github-release'
+	rd.rdoc_files.include("README.md", "lib/**/*.rb")
+end
diff --git a/bin/git-release b/bin/git-release
new file mode 100755
index 0000000..a0512e8
--- /dev/null
+++ b/bin/git-release
@@ -0,0 +1,5 @@
+#!/usr/bin/env ruby
+
+require 'github-release'
+
+GithubRelease.new.run
diff --git a/github-release.gemspec b/github-release.gemspec
new file mode 100644
index 0000000..f0dbf9b
--- /dev/null
+++ b/github-release.gemspec
@@ -0,0 +1,25 @@
+require 'git-version-bump'
+
+Gem::Specification.new do |s|
+	s.name = "github-release"
+
+	s.version = GVB.version
+	s.date    = GVB.date
+
+	s.platform = Gem::Platform::RUBY
+
+	s.homepage = "http://theshed.hezmatt.org/github-release"
+	s.summary = "Upload tag annotations to github"
+	s.authors = ["Matt Palmer"]
+
+	s.extra_rdoc_files = ["README.md"]
+	s.files = `git ls-files`.split("\n")
+	s.executables = ["git-release"]
+
+	s.add_dependency 'octokit'
+	s.add_dependency 'git-version-bump'
+
+	s.add_development_dependency 'rake'
+	s.add_development_dependency 'bundler'
+	s.add_development_dependency 'rdoc'
+end
diff --git a/lib/github-release.rb b/lib/github-release.rb
new file mode 100644
index 0000000..697f7b2
--- /dev/null
+++ b/lib/github-release.rb
@@ -0,0 +1,135 @@
+require 'octokit'
+require 'io/console'
+
+class GithubRelease
+	def run
+		new_releases = tagged_releases.select { |r| !github_releases.include?(r) }
+
+		if new_releases.empty?
+			puts "No new release tags to push."
+		end
+
+		new_releases.each { |t| create_release(t) }
+
+		puts "All done!"
+	end
+
+	private
+	def api
+		@api ||= Octokit::Client.new(:access_token => token)
+	end
+
+	def token
+		@token ||= begin
+			# We cannot use the 'defaults' functionality of git_config here,
+			# because get_new_token would be evaluated before git_config ran
+			git_config("release.api-token") || get_new_token
+		end
+
+		log_val(@token)
+	end
+
+	def get_new_token
+		puts "Requesting a new OAuth token from Github..."
+		print "Github username: "
+		user = $stdin.gets.chomp
+		print "Github password: "
+		pass = $stdin.noecho(&:gets).chomp
+		puts
+
+		api = Octokit::Client.new(:login => user, :password => pass)
+		begin
+			res = api.create_authorization(:scopes => [:repo], :note => "git release")
+		rescue Octokit::Unauthorized
+			puts "Username or password incorrect.  Please try again."
+			return get_new_token
+		end
+
+		token = res[:token]
+
+		system("git config --global release.api-token '#{token}'")
+
+		log_val(token)
+	end
+
+	def tag_regex
+		@tag_regex ||= `git config --get release.tag-regex`.strip
+		@tag_regex = /^v\d+\.\d+(\.\d+)?$/ if @tag_regex.empty?
+		log_val(@tag_regex)
+	end
+
+	def tagged_releases
+		@tagged_releases ||= `git tag`.split("\n").map(&:strip).grep tag_regex
+		log_val(@tagged_releases)
+	end
+
+	def repo_name
+		@repo_name ||= begin
+			case repo_url
+				when %r{^https://github.com/([^/]+/[^/]+)}
+					return $1.gsub(/\.git$/, '')
+				when %r{^(?:git@)?github\.com:([^/]+/[^/]+)}
+					return $1.gsub(/\.git$/, '')
+				else
+					raise RuntimeError,
+					      "I cannot recognise the format of the push URL for remote #{remote_name} (#{repo_url})"
+			end
+		end
+		log_val(@repo_name)
+	end
+
+	def repo_url
+		@repo_url ||= begin
+			git_config("remote.#{remote_name}.pushurl") || git_config("remote.#{remote_name}.url")
+		end
+		log_val(@repo_url)
+	end
+
+	def remote_name
+		@remote_name ||= git_config("release.remote", "origin")
+		log_val(@remote_name)
+	end
+
+	def github_releases
+		@github_releases ||= api.repo(repo_name).rels[:releases].get.data.map(&:tag_name)
+		log_val(@github_releases)
+	end
+
+	def git_config(item, default = nil)
+		@config_cache ||= {}
+
+		@config_cache[item] ||= begin
+			v = `git config #{item}`.strip
+			v.empty? ? default : v
+		end
+
+		log_val(@config_cache[item], item)
+	end
+
+	def create_release(tag)
+		print "Creating a release for #{tag}..."
+		system("git push #{remote_name} tag #{tag} >/dev/null")
+
+		msg = `git tag -l -n1000 '#{tag}'`
+
+		# Ye ghods is is a horrific format to parse
+		name, body = msg.split("\n", 2)
+		name = name.gsub(/^#{tag}/, '').strip
+		body = body.split("\n").map { |l| l.sub(/^    /, '') }.join("\n")
+
+		api.create_release(repo_name, tag, :name => name, :body => body)
+
+		puts " done!"
+	end
+
+	def log_val(v, note = nil)
+		return v unless $DEBUG
+
+		calling_func = caller[0].split("`")[-1].sub(/'$/, '')
+
+		print "#{note}: " if note
+		puts "#{calling_func} => #{v.inspect}"
+
+		v
+	end
+end