feat(all): Add codecov upload in travis

.travis.yml

@@ -16,6 +16,13 @@ addons:
   apt:
     packages:
     - postfix
+    - libcurl4-openssl-dev
+    - libelf-dev
+    - libdw-dev
+    - cmake
+    - gcc
+    - binutils-dev
+    - libiberty-dev
 
 before_script:
   - smtp-sink 2525 1000&
@@ -24,3 +31,17 @@ before_script:
 script:
   - cargo test --verbose --all
 
+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/lettre*[^\.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"

README.md

@@ -4,6 +4,7 @@
 
 [![Build Status](https://travis-ci.org/lettre/lettre.svg?branch=master)](https://travis-ci.org/lettre/lettre)
 [![Build status](https://ci.appveyor.com/api/projects/status/mpwglemugjtkps2d/branch/master?svg=true)](https://ci.appveyor.com/project/amousset/lettre/branch/master)
+[![codecov](https://codecov.io/gh/lettre/lettre/branch/master/graph/badge.svg)](https://codecov.io/gh/lettre/lettre)
 
 [![Crate](https://img.shields.io/crates/v/lettre.svg)](https://crates.io/crates/lettre)
 [![Docs](https://docs.rs/lettre/badge.svg)](https://docs.rs/lettre/)