create coveralls stats of the nightly build

.travis.yml

@@ -1,4 +1,3 @@
-sudo: false
 language: rust
 cache: cargo
 
@@ -12,7 +11,6 @@ addons:
       - binutils-dev # optional: only required for the --verify flag of coveralls
 
 rust:
-  - beta
   - nightly
 
 matrix:
@@ -32,9 +30,20 @@ script:
       travis-cargo test -- $FEATURES &&
       travis-cargo --only stable doc -- $FEATURES
 
+## Currently travis-coveralls seems to be broken:
+## https://github.com/huonw/travis-cargo/issues/58
+## The following does not work:
+# after_success: |
+#   [ $TRAVIS_RUST_VERSION = nightly ] &&
+#   travis-cargo coveralls --no-sudo --verify
+#
+## Use this workaround:
 after_success: |
-  [ $TRAVIS_RUST_VERSION = stable ] &&
-  travis-cargo coveralls --no-sudo --verify
+  sudo apt-get install libcurl4-openssl-dev libelf-dev libdw-dev &&
+  wget https://github.com/SimonKagstrom/kcov/archive/master.tar.gz &&
+  tar xzf master.tar.gz && mkdir kcov-master/build && cd kcov-master/build &&
+  cmake .. && make && sudo make install && cd ../.. &&
+  kcov --coveralls-id=$TRAVIS_JOB_ID --exclude-pattern=/.cargo target/kcov target/debug/openfairdb-*
 
 env:
   global: