added a new Travis check: validate the RNC schema files

.travis.yml

@@ -5,12 +5,18 @@ before_install:
     # disable rvm, use system Ruby
     - rvm reset
     - wget https://raw.githubusercontent.com/yast/yast-devtools/master/travis-tools/travis_setup.sh
-    - sh ./travis_setup.sh -p "rake yast2-devtools yast2-testsuite yast2 yast2-storage yast2-xml yast2-transfer yast2-services-manager yast2-installation-control yast2-packager" -g "rspec:2.14.1 yast-rake gettext"
+    - sh ./travis_setup.sh -p "rake yast2-devtools yast2-testsuite yast2 yast2-storage yast2-xml yast2-transfer yast2-services-manager yast2-installation-control yast2-packager trang" -g "rspec:2.14.1 yast-rake gettext"
 script:
     - rake check:syntax
     - rake check:pot
     - make -f Makefile.cvs
     - make
     - sudo make install
     - make check
+    # explicitly check the RNC schema files for errors
+    # (the files are defined here, but converted in yast2-schema)
+    - find . -name "*.rnc" -exec trang -I rnc -O rng \{\} \{\}.rng \; 2> trang.log
+    # grep for "error" in the output, "trang" returns 0 exit status
+    # even on an error :-(
+    - grep -i -v -q error trang.log