Better code coverage maybe?

.travis.yml

@@ -1,10 +1,26 @@
-sudo: required
 language: rust
-# Dependencies of kcov, used by coverage
+
+sudo: required
+
+rust:
+  - stable
+  - beta
+  - nightly
+
+matrix:
+  allow_failures:
+    - rust: nightly
+
 addons:
   apt:
     packages:
-      - libssl-dev
+      - libcurl4-openssl-dev
+      - libelf-dev
+      - libdw-dev
+      - cmake
+      - gcc
+      - binutils-dev
+      - libiberty-dev
 
 services:
 - docker
@@ -30,8 +46,17 @@ before_install:
  - docker pull greenmail/standalone:1.5.8
  - docker run -t -i -e GREENMAIL_OPTS='-Dgreenmail.setup.test.all -Dgreenmail.hostname=0.0.0.0 -Dgreenmail.auth.disabled -Dgreenmail.verbose' -p 3025:3025 -p 3110:3110 -p 3143:3143 -p 3465:3465 -p 3993:3993 -p 3995:3995 greenmail/standalone:1.5.8
 
-after_success:
-- if [[ "$TRAVIS_OS_NAME" == "linux" && "$TRAVIS_RUST_VERSION" == "stable" ]]; then
-    bash <(curl https://raw.githubusercontent.com/xd009642/tarpaulin/master/travis-install.sh);
-    cargo tarpaulin --ciserver travis-ci --coveralls $TRAVIS_JOB_ID;
-  fi
+after_success: |
+  wget https://github.com/SimonKagstrom/kcov/archive/master.tar.gz &&
+  tar xzf master.tar.gz &&
+  cd kcov-master &&
+  mkdir build &&
+  cd build &&
+  cmake .. &&
+  make &&
+  make install DESTDIR=../../kcov-build &&
+  cd ../.. &&
+  rm -rf kcov-master &&
+  for file in target/debug/imap-*[^\.d]; do mkdir -p "target/cov/$(basename $file)"; ./kcov-build/usr/local/bin/kcov --exclude-pattern=/.cargo,/usr/lib --verify "target/cov/$(basename $file)" "$file"; done &&
+  bash <(curl -s https://codecov.io/bash) &&
+  echo "Uploaded code coverage"