Add danger

Dangerfile

@@ -0,0 +1,16 @@
+# Sometimes it's a README fix, or something like that - which isn't relevant for
+# including in a project's CHANGELOG for example
+declared_trivial = github.pr_title.include? "#trivial"
+has_source_changes = !git.modified_files.grep(/Source/).empty?
+
+# Make it more obvious that a PR is a work in progress and shouldn't be merged yet
+warn("PR is classed as Work in Progress") if github.pr_title.include? "[WIP]"
+
+# Warn when there is a big PR
+warn("This is a big PR, please consider splitting it up to ease code review.") if git.lines_of_code > 500
+
+# Changelog entries are required for changes to source files.
+no_changelog_entry = !git.modified_files.include?("CHANGELOG.md")
+if has_source_changes && no_changelog_entry && not_declared_trivial
+  fail("Any source code changes should have an entry in CHANGELOG.md.")
+end

Gemfile

@@ -1,3 +1,3 @@
 source 'https://rubygems.org'
 
-gem 'slather'
+gem 'danger'

run_tests_update_status.sh

@@ -30,6 +30,9 @@ trap trap_handler INT TERM EXIT
 
 updateStatus "pending" "Starting build…"
 
+echo "--- Running Danger"
+bundle exec danger --verbose 2>&1|tee `pwd`/log.txt
+
 ./build.sh all 2>&1|tee `pwd`/log.txt
 
 rm `pwd`/log.txt