fastlane: Add support from beta-ing from GitHub Actions

In two parts:

- Add code for testing the GITHUB_REF environment variable, which is
  present on GitHub Actions builds and will be set to refs/tags/<tag> on
  tag builds.

- Add a fallback that shells out to `git show` to retrieve commit
  messages in case we want to use that instead.

Signed-off-by: Kristofer Rye <[email protected]>

Author: rye

fastlane/lib/util.rb

@@ -27,15 +27,21 @@ def travis_cron?
 def tagged?
 	travis = ENV['TRAVIS_TAG'] && !ENV['TRAVIS_TAG'].empty?
 	circle = ENV['CIRCLE_TAG'] && !ENV['CIRCLE_TAG'].empty?
-	travis || circle
+	github = ENV['GITHUB_REF'] && ENV['GITHUB_REF'] =~ /^refs\/tags\/(.+)$/
+	github || travis || circle
 end
 
 # does the commit message tell us to make a new beta?
 def commit_says_deploy?
-	commit = ENV['TRAVIS_COMMIT_MESSAGE'] || ENV['GIT_COMMIT_DESC']
+	commit = ENV['TRAVIS_COMMIT_MESSAGE'] || ENV['GIT_COMMIT_DESC'] || `git show --pretty=format:%B HEAD`
 	commit =~ /\[ci run beta\]/
 end
 
+# are we running on github actions?
+def github_actions?
+	!!ENV['GITHUB_SHA']
+end
+
 # are we running on travis?
 def travis?
 	ENV['TRAVIS'] == 'true'