Merge pull request #10 from Dallinger/danger

Check PRs with Danger

.travis.yml

@@ -17,6 +17,7 @@ install:
 - wget -O- https://toolbelt.heroku.com/install-ubuntu.sh | sh
 - git config --global user.email "dallinger@mailinator.com"
 - git config --global user.name "William Henry Dallinger FRS"
+- gem install danger
 before_script:
 - psql -c 'create database db;' -U postgres
 env:
@@ -28,6 +29,7 @@ env:
   - secure: fd4hFOH60UV8laBN4Mjva0w/EmVK3SVC5p/0O1oqPriPhUpoJ3eVVRvITbdvPctEJJgRR9t62rPk+Rv4EOXeRFfsjZK9gOfQqv/9VhJBebdQfOx2dwQLjDiGTrklkokDIDyfpyYOoJzZ/oP+6EneD403ilHnXC4fd/4EDQmaIRI=
   - secure: 3rnkGugv5Hp71gjwQMUj5tup7/xk94p5IXEh0VItSXTziKn0pBY+yrCzAuIzlylbrl0baLaZOFGEFn2K+Jf+tr9mmN23X+zOUNsIqC4swlLLJx6hzH5AZaRmqzGjURM2gLISUayXGT9flOXyOKzzCGFELJKG9KlVyEOJ4fk04wQ=
 script:
+- bundle exec danger
 - make -C docs html spelling
 - nosetests --with-coverage --cover-package dallinger
 # - nosetests tests._test_heroku --nocapture

Dangerfile

@@ -0,0 +1,19 @@
+# Note contributors not in the organization.
+unless github.api.organization_member?('Dallinger', github.pr_author)
+  message("@#{github.pr_author}, would you like to join the Dallinger org.?")
+end
+
+# Encourage writing up some reasoning about the PR.
+if github.pr_body.length < 5
+  fail("Please provide a summary in the Pull Request description.")
+end
+
+# Ensure a clean commit history.
+if git.commits.any? { |c| c.message =~ /^Merge branch/ }
+  fail('Please rebase to get rid of the merge commits.')
+end
+
+# Require labels on PRs.
+has_enhancement_label = github.pr_labels.include?("enhancement")
+has_bug_label = github.pr_labels.include?("bug")
+warn("Please label as 'enhancement', 'bug', 'demo', or 'release'.", sticky: true) if !has_enhancement_label && !has_bug_label

Gemfile

@@ -0,0 +1,3 @@
+source "https://rubygems.org"
+
+gem "danger"