Add code coverage via GitLab CI

.gitlab-ci.yml

@@ -0,0 +1,11 @@
+image: "rust:latest"
+
+run kcov:
+  stage: test
+  image: docker:latest
+  services:
+    - docker:dind
+  script:
+    - docker --version
+    - ./scripts/kcov.sh
+    - curl -v -s https://codecov.io/bash | bash

README.md

@@ -2,7 +2,7 @@
 
 > **S**pecs **P**arallel **ECS**
 
-[![Build Status][bi]][bl] [![Crates.io][ci]][cl] [![Gitter][gi]][gl] ![MIT/Apache][li] [![Docs.rs][di]][dl] ![LoC][lo]
+[![Build Status][bi]][bl] [![Crates.io][ci]][cl] [![Gitter][gi]][gl] ![MIT/Apache][li] [![Docs.rs][di]][dl] [![Code coverage][s7]][cov] ![LoC][lo]
 
 [bi]: https://travis-ci.org/slide-rs/specs.svg?branch=master
 [bl]: https://travis-ci.org/slide-rs/specs
@@ -18,6 +18,9 @@
 [gi]: https://badges.gitter.im/slide-rs/specs.svg
 [gl]: https://gitter.im/slide-rs/specs
 
+[coi]: https://img.shields.io/codecov/c/gitlab/torkleyy/specs/master.svg
+[cov]: https://codecov.io/gl/torkleyy/specs/branch/master
+
 [lo]: https://tokei.rs/b1/github/slide-rs/specs?category=code
 
 Specs is an Entity-Component System written in Rust.

codecov.yml

@@ -0,0 +1,26 @@
+codecov:
+  notify:
+    require_ci_to_pass: yes
+
+coverage:
+  precision: 2
+  round: down
+  #  range: "70...100"
+
+  status:
+    project: yes
+    patch: yes
+    changes: no
+
+parsers:
+  gcov:
+    branch_detection:
+      conditional: yes
+      loop: yes
+      method: no
+      macro: no
+
+comment:
+  layout: "header, diff"
+  behavior: default
+  require_changes: no

scripts/kcov.sh

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+docker rm -f mykcov1
+
+# Run image (non-blocking)
+docker run -dt --security-opt seccomp=unconfined --name mykcov1 --entrypoint /bin/sh registry.gitlab.com/torkleyy/docker-cargo-kcov || exit 1
+
+#docker cp Cargo.lock mykcov1:/volume
+docker cp Cargo.toml mykcov1:/volume
+docker cp src/ mykcov1:/volume
+docker cp tests/ mykcov1:/volume
+docker cp specs-derive/ mykcov1:/volume
+docker cp examples/ mykcov1:/volume
+docker cp benches/ mykcov1:/volume
+
+docker exec -t mykcov1 /bin/sh -c "cargo check --all" || echo "Failed to generate rustc meta"
+docker exec -t mykcov1 /bin/sh -c "cargo kcov --all" || echo "Failed generating report"
+
+rm -R cov
+mkdir -p cov
+docker cp mykcov1:/volume/target/cov ./
+
+# Force remove image
+docker rm -f mykcov1