Try to add codecov

.travis.yml

@@ -7,4 +7,22 @@ matrix:
   allow_failures:
     - rust: nightly
   fast_finish: true
-cache: cargo
+cache:
+  cargo: true
+  directories:
+  - kcov-master
+dist: trusty
+
+addons:
+  apt:
+    packages:
+      - libcurl4-openssl-dev
+      - libelf-dev
+      - libdw-dev
+      - cmake
+      - gcc
+      - binutils-dev
+      - zlib1g-dev
+      - libiberty-dev
+
+script: cargo test && ./coverage.sh

coverage.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+wget https://github.com/SimonKagstrom/kcov/archive/master.tar.gz &&
+tar xzf master.tar.gz &&
+mkdir -p kcov-master/build &&
+cd kcov-master/build &&
+cmake .. &&
+make &&
+sudo make install &&
+cd ../.. &&
+for file in target/debug/*-*[^\.d]; do
+	if [[ -x "$file" ]]
+	then
+		filename=$(basename $file)
+		mkdir -p "target/cov/$filename"
+		kcov --exclude-pattern=/.cargo,/usr/lib --verify "target/cov/$filename" "$file"
+	fi
+done &&
+bash <(curl -s https://codecov.io/bash) &&
+echo "Uploaded code coverage"