Bring codecov back

.gitlab-ci.yml

@@ -290,6 +290,53 @@ docs:
     - chown -R nonroot:nonroot ./crate-docs
 
 
+codecov:
+  stage:                           workspace
+  <<:                              *docker-env
+  <<:                              *test-refs
+  needs:
+    - job:                         check-std
+      artifacts:                   false
+  variables:
+    # For codecov it's sufficient to run the fuzz tests only once.
+    QUICKCHECK_TESTS:              1
+    INK_COVERAGE_REPORTING:        "true"
+    CARGO_INCREMENTAL:             0
+    # Needed because `codecov` requires nightly features to work
+    # (see `-Z` in the `RUSTFLAGS` below).
+    RUSTC_BOOSTRAP:                1
+    # Variables partly came from https://github.com/mozilla/grcov/blob/master/README.md
+    RUSTFLAGS:                     "-Zprofile -Zmir-opt-level=0 -Ccodegen-units=1
+                                    -Clink-dead-code -Copt-level=0 -Coverflow-checks=off"
+    # The `cargo-taurpalin` coverage reporting tool seems to have better code instrumentation and thus
+    # produces better results for Rust codebases in general. However, unlike `grcov` it requires
+    # running docker with `--security-opt seccomp=unconfined` which is why we use `grcov` instead.
+  before_script:
+    - *rust-info-script
+    # RUSTFLAGS are the cause target cache can't be used here
+    # FIXME: cust-covfix doesn't support the external target dir
+    # https://github.com/Kogia-sima/rust-covfix/issues/7
+    - unset "CARGO_TARGET_DIR"
+    - cargo clean
+    # make sure there's no stale coverage artifacts
+    - find . -name "*.profraw" -type f -delete
+    - find . -name "*.gcda" -type f -delete
+  script:
+    # RUSTFLAGS are the cause target cache can't be used here
+    - cargo build --verbose --all-features --workspace
+    - cargo test --verbose --all-features --no-fail-fast --workspace
+    # coverage with branches
+    - grcov . --binary-path ./target/debug/ --source-dir . --output-type lcov --llvm --branch
+        --ignore-not-existing --ignore "/*" --ignore "tests/*" --output-path lcov-w-branch.info
+    - rust-covfix lcov-w-branch.info --output lcov-w-branch-fixed.info
+    - codecov --token "$CODECOV_P_TOKEN" --file lcov-w-branch-fixed.info --nonZero
+    # lines coverage
+    - grcov . --binary-path ./target/debug/ --source-dir . --output-type lcov --llvm
+        --ignore-not-existing --ignore "/*" --ignore "tests/*" --output-path lcov-lines.info
+    - rust-covfix lcov-lines.info --output lcov-lines-fixed.info
+    - codecov --token "$CODECOV_TOKEN" --file lcov-lines-fixed.info --nonZero
+
+
 #### stage:                        examples
 
 examples-test:

README.md

@@ -4,10 +4,14 @@
     Parity's ink! for writing smart contracts
 </h1>
 
-[![linux][a1]][a2] [![loc][e1]][e2] [![stack-exchange][s1]][s2]
+[![linux][a1]][a2] [![codecov][c1]][c2] [![coveralls][d1]][d2] [![loc][e1]][e2] [![stack-exchange][s1]][s2]
 
 [a1]: https://gitlab.parity.io/parity/ink/badges/master/pipeline.svg
 [a2]: https://gitlab.parity.io/parity/ink/pipelines?ref=master
+[c1]: https://codecov.io/gh/paritytech/ink/branch/master/graph/badge.svg
+[c2]: https://codecov.io/gh/paritytech/ink/branch/master
+[d1]: https://coveralls.io/repos/github/paritytech/ink/badge.svg?branch=master
+[d2]: https://coveralls.io/github/paritytech/ink?branch=master
 [e1]: https://tokei.rs/b1/github/paritytech/ink?category=code
 [e2]: https://github.com/Aaronepower/tokei#badges
 [f1]: https://img.shields.io/badge/click-blue.svg
@@ -158,7 +162,7 @@ mod flipper {
     #[cfg(test)]
     mod tests {
         use super::*;
-
+        
         #[ink::test]
         fn it_works() {
             let mut flipper = Flipper::new(false);