Release 0.14.0 (#300)

* Introduce script to automate release

* Rakefile levelup

* Version 0.14.0

* Fix newline at end of podspec.json

* Ensure we start and end on master branch

And that we pull latest master before tagging

* CRLF at EOF

* Remove [:version] param from `release:finish` task

It can be guessed from the current podspec version

* Fix create_release task

* Ensure we run rake via bundle exec

Co-authored-by: David Jennes <djbe@users.noreply.github.com>

Co-authored-by: David Jennes <djbe@users.noreply.github.com>

rakelib/release.rake

@@ -0,0 +1,67 @@
+require 'json'
+
+namespace :release do
+
+  # rake release:new
+  desc "Ask for a version number and prepare a release PR for that version"
+  task :new do
+    info "Current version is: #{current_pod_version}"
+    print "What version do you want to release? "
+    new_version = STDIN.gets.chomp
+
+    Rake::Task['release:start'].invoke(new_version)
+  end
+
+  # rake release:start[version]
+  desc "Start a release by creating a PR with the required changes to bump the version"
+  task :start, [:version] => ['release:create_branch', 'release:update_files', 'pod:lint', 'release:push_branch', 'github:create_release_pr', 'github:pull_master']
+
+  # rake release:finish[version]
+  desc "Finish a release after the PR has been merged, by tagging master and pushing to trunk"
+  task :finish => ['github:pull_master', 'github:tag', 'pod:push', 'github:create_release', 'changelog:reset']
+
+
+  ### Helper tasks ###
+
+  # rake release:create_branch[version]
+  task :create_branch, [:version] do |_, args|
+    branch = release_branch(args[:version])
+
+    header "Creating release branch"
+    sh("git", "checkout", "-b", branch)
+  end
+
+  # rake release:update_files[version]
+  task :update_files, [:version] do |_, args|
+    version = args[:version]
+
+    header "Updating files for version #{version}"
+
+    podspec = JSON.parse(File.read(PODSPEC_FILE))
+    podspec['version'] = version
+    podspec['source']['tag'] = version
+    File.write(PODSPEC_FILE, JSON.pretty_generate(podspec) + "\n")
+
+    replace(CHANGELOG_FILE, '## Master' => "\#\# #{version}")
+    replace("docs/conf.py",
+      /^version = .*/ => %Q(version = '#{version}'),
+      /^release = .*/ => %Q(release = '#{version}')
+    )
+    replace("docs/installation.rst",
+      /pod 'Stencil', '.*'/ => %Q(pod 'Stencil', '~> #{version}'),
+      /github "stencilproject\/Stencil" ~> .*/ => %Q(github "stencilproject/Stencil" ~> #{version})
+    )
+
+    ## Commit Changes
+    sh("git", "add", PODSPEC_FILE, CHANGELOG_FILE, "docs/*")
+    sh("git", "commit", "-m", "Version #{version}")
+  end
+
+  # rake release:push_branch[version]
+  task :push_branch, [:version] do |_, args|
+    branch = release_branch(args[:version])
+
+    header "Pushing #{branch} to origin"
+    sh("git", "push", "-u", "origin", branch)
+  end
+end