coverage: added code coverage

added code coverage using blanket and symbol-repot from Ferrocene
for now added a demo workflow to compute that, it will be later converted into a reusable workflow

Signed-off-by: Dan Calavrezo <195309321+dcalavrezo-qorix@users.noreply.github.com>

Author: dcalavrezo-qorix

.bazelrc

@@ -71,6 +71,21 @@ build:per-arm64-qnx --extra_toolchains=@toolchains_qnx_qcc//:qcc_aarch64
 build:per-arm64-qnx --extra_toolchains=@toolchains_qnx_ifs//:ifs_aarch64
 build:per-arm64-qnx --extra_toolchains=@score_toolchains_rust//toolchains/ferrocene:ferrocene_aarch64_unknown_nto_qnx800
 
+
+# -------------------------------------------------------------------------------
+# Ferrocene Rust coverage config
+# -------------------------------------------------------------------------------
+build:ferrocene-coverage --@rules_rust//rust/settings:extra_rustc_flag=-Cinstrument-coverage
+build:ferrocene-coverage --@rules_rust//rust/settings:extra_rustc_flag=-Clink-dead-code
+build:ferrocene-coverage --@rules_rust//rust/settings:extra_rustc_flag=-Ccodegen-units=1
+build:ferrocene-coverage --@rules_rust//rust/settings:extra_rustc_flag=-Cdebuginfo=2
+build:ferrocene-coverage --@rules_rust//rust/settings:extra_exec_rustc_flag=-Cinstrument-coverage
+build:ferrocene-coverage --@rules_rust//rust/settings:extra_exec_rustc_flag=-Clink-dead-code
+build:ferrocene-coverage --@rules_rust//rust/settings:extra_exec_rustc_flag=-Ccodegen-units=1
+build:ferrocene-coverage --@rules_rust//rust/settings:extra_exec_rustc_flag=-Cdebuginfo=2
+test:ferrocene-coverage --run_under=@score_tooling//coverage:llvm_profile_wrapper
+
+
 # -------------------------------------------------------------------------------
 # Import local user workspace file, if exists
 # -------------------------------------------------------------------------------

.github/workflows/rust_coverage.yml

@@ -0,0 +1,37 @@
+name: Rust Coverage (Demo)
+on:
+  pull_request:
+    types: [opened, reopened, synchronize]
+  workflow_dispatch:
+
+jobs:
+  rust_coverage:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4.2.2
+
+      - name: Setup Bazel
+        uses: bazel-contrib/setup-bazel@0.14.0
+
+      - name: Run Rust tests with coverage instrumentation
+        run: |
+          set -euo pipefail
+          bazel test --config=per-x86_64-linux --config=ferrocene-coverage \
+            --nocache_test_results \
+            //src/rust/...
+
+      - name: Generate Ferrocene coverage reports
+        run: |
+          set -euo pipefail
+          bazel run //:rust_coverage -- --min-line-coverage 75
+
+      - name: Locate coverage artifacts
+        run: |
+          echo "COVERAGE_DIR=$(bazel info bazel-bin)/coverage/rust-tests" >> "${GITHUB_ENV}"
+
+      - name: Upload coverage HTML
+        uses: actions/upload-artifact@v4
+        with:
+          name: rust-coverage-html
+          path: ${{ env.COVERAGE_DIR }}

BUILD

@@ -13,7 +13,7 @@
 
 load("@rules_rust//rust:defs.bzl", "rust_clippy")
 load("@score_docs_as_code//:docs.bzl", "docs")
-load("@score_tooling//:defs.bzl", "cli_helper", "copyright_checker", "dash_license_checker", "setup_starpls", "use_format_targets")
+load("@score_tooling//:defs.bzl", "cli_helper", "copyright_checker", "dash_license_checker", "rust_coverage_report", "setup_starpls", "use_format_targets")
 load("//:project_config.bzl", "PROJECT_CONFIG")
 
 # Creates all documentation targets:
@@ -84,6 +84,22 @@ cli_helper(
     visibility = ["//visibility:public"],
 )
 
+rust_coverage_report(
+    name = "rust_coverage",
+    bazel_configs = [
+        "per-x86_64-linux",
+        "ferrocene-coverage",
+    ],
+    query = 'kind("rust_test", //src/rust/...)',
+    visibility = ["//visibility:public"],
+)
+
+alias(
+    name = "rust_coverage_report",
+    actual = ":rust_coverage",
+    visibility = ["//visibility:public"],
+)
+
 # Add target for formatting checks
 use_format_targets()
 

MODULE.bazel

@@ -85,15 +85,7 @@ bazel_dep(name = "score_docs_as_code", version = "2.2.0")
 bazel_dep(name = "score_platform", version = "0.5.0")
 bazel_dep(name = "score_process", version = "1.3.2")
 bazel_dep(name = "score_python_basics", version = "0.3.4")
-bazel_dep(name = "score_tooling", version = "1.0.3")
-
-# ToDo: remove this once 1.0.4 is released,
-# since it will contain updated cr_checker
-git_override(
-    module_name = "score_tooling",
-    commit = "654664dae7df2700fd5840c5ed6c07ac6c61705d",  #until 1.0.4 is released
-    remote = "https://github.com/eclipse-score/tooling.git",
-)
+bazel_dep(name = "score_tooling", version = "1.1.0")
 
 # ToDo: implicit dependencies for score_tooling, but needed directly here??
 bazel_dep(name = "aspect_rules_lint", version = "1.10.2")
@@ -117,7 +109,7 @@ git_override(
     remote = "https://github.com/eclipse-score/baselibs.git",
 )
 
-bazel_dep(name = "score_toolchains_rust", version = "0.2.0", dev_dependency = True)
+bazel_dep(name = "score_toolchains_rust", version = "0.4.0", dev_dependency = True)
 bazel_dep(name = "custom_qemu", version = "1.0.0", dev_dependency = True)
 archive_override(
     module_name = "custom_qemu",

src/rust/rust_kvs/tests/common/mod.rs

@@ -3,8 +3,8 @@
 // Common test utilities are placed in `common/mod.rs` on purpose.
 // This is to ensure file is not improperly detected as empty test file.
 
-use rust_kvs::kvs_value::KvsValue;
 use core::iter::zip;
+use rust_kvs::kvs_value::KvsValue;
 
 /// Compare `KvsValue` objects.
 ///