[ci] Java rule change is not detected

* Use "HEAD" instead of "FETCH_HEAD" for patch branch.
  FETCH_HEAD might change, if another fetch is done. HEAD
  always points to the currently checked out commit, that
  has been built.
* Add --patch-config to use the same config as for the baseline
  (see .travis/regression-tester.sh). However, currently this
  is ignored, when "--auto-gen-config" is used.
* Use long argument names for better readability

Fixes #2820

.travis/regression-tester.sh

@@ -31,7 +31,7 @@ function regression-tester_uploadBaseline() {
         log_info "Generating and uploading baseline for pmdtester..."
         cd ..
         bundle config --local gemfile pmd/Gemfile
-        pmd/.travis/travis_wait "bundle exec pmdtester -m single -r ./pmd -p ${TRAVIS_BRANCH} -pc ./pmd/.travis/all-java.xml -l ./pmd/.travis/project-list.xml -f"
+        pmd/.travis/travis_wait "bundle exec pmdtester --mode single --local-git-repo ./pmd --patch-branch ${TRAVIS_BRANCH} --patch-config ./pmd/.travis/all-java.xml --list-of-project ./pmd/.travis/project-list.xml --html-flag"
         cd target/reports
         BRANCH_FILENAME="${TRAVIS_BRANCH/\//_}"
         zip -q -r ${BRANCH_FILENAME}-baseline.zip ${BRANCH_FILENAME}/

Dangerfile

@@ -6,7 +6,14 @@ require 'logger'
 
 def run_pmdtester
   Dir.chdir('..') do
-    argv = ['-r', './pmd', '-b', "#{ENV['TRAVIS_BRANCH']}", '-p', 'FETCH_HEAD', '-m', 'online', '-a']
+    argv = ['--local-git-repo, './pmd',
+            '--base-branch', "#{ENV['TRAVIS_BRANCH']}",
+            '--patch-branch', 'HEAD',
+            '--patch-config', './pmd/.travis/all-java.xml',
+            '--mode', 'online',
+            '--auto-gen-config',
+            # '--debug',
+            ]
     begin
       runner = PmdTester::Runner.new(argv)
       @new_errors, @removed_errors, @new_violations, @removed_violations, @new_configerrors, @removed_configerrors = runner.run