From 48deb72574416f431da3e805c52dbc76101e327e Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Fri, 7 Jul 2023 21:04:08 +0200
Subject: support code coverage report generation

---
 .github/workflows/ci.yml | 21 ++++++++++++++++++++-
 Makefile                 | 18 ++++++++++++++++++
 src/CMakeLists.txt       |  6 ++++++
 3 files changed, 44 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 414e6fc..e207ccf 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -46,8 +46,27 @@ jobs:
       - name: Run Valgrind tests
         run: make test/valgrind
 
+  coverage:
+    runs-on: ubuntu-latest
+    name: Coverage report
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo DEBIAN_FRONTEND=noninteractive apt-get install -yq --no-install-recommends gcovr libgit2-dev libsqlite3-dev python3-pytest valgrind
+      - name: Generate report
+        run: make coverage
+      - name: Upload report
+        uses: actions/upload-artifact@v3
+        with:
+          name: coverage
+          path: ./build/coverage/
+          if-no-files-found: error
+
   publish:
-    needs: [lint, build]
+    needs: [lint, build, coverage]
     runs-on: ubuntu-latest
     name: 'Docker: publish'
     steps:
diff --git a/Makefile b/Makefile
index 8a4c755..7b5a8b9 100644
--- a/Makefile
+++ b/Makefile
@@ -4,18 +4,21 @@ src_dir := $(abspath .)
 build_dir := $(src_dir)/build
 cmake_dir := $(build_dir)/cmake
 install_dir := $(build_dir)/install
+coverage_dir := $(build_dir)/coverage
 
 COMPILER ?= clang
 CONFIGURATION ?= Debug
 DEFAULT_HOST ?= 127.0.0.1
 DEFAULT_PORT ?= 5556
 INSTALL_PREFIX ?= $(install_dir)
+COVERAGE ?=
 
 $(eval $(call noexpand,COMPILER))
 $(eval $(call noexpand,CONFIGURATION))
 $(eval $(call noexpand,DEFAULT_HOST))
 $(eval $(call noexpand,DEFAULT_PORT))
 $(eval $(call noexpand,INSTALL_PREFIX))
+$(eval $(call noexpand,COVERAGE))
 
 .PHONY: all
 all: build
@@ -37,6 +40,7 @@ build:
 		-D 'CMAKE_INSTALL_PREFIX=$(call escape,$(INSTALL_PREFIX))' \
 		-D 'DEFAULT_HOST=$(call escape,$(DEFAULT_HOST))' \
 		-D 'DEFAULT_PORT=$(call escape,$(DEFAULT_PORT))' \
+		-D 'COVERAGE=$(call escape,$(COVERAGE))' \
 		-S '$(call escape,$(src_dir))' \
 		-B '$(call escape,$(cmake_dir))'
 	cmake --build '$(call escape,$(cmake_dir))' -- -j
@@ -45,6 +49,20 @@ build:
 release: CONFIGURATION := Release
 release: build
 
+.PHONY: coverage
+coverage: COMPILER := gcc
+coverage: CONFIGURATION := Debug
+coverage: COVERAGE := 1
+coverage: clean build test
+	@echo -----------------------------------------------------------------
+	@echo Generating code coverage report
+	@echo -----------------------------------------------------------------
+	@mkdir -p -- '$(call escape,$(coverage_dir))'
+	gcovr --html-details '$(call escape,$(coverage_dir))/index.html' --print-summary
+ifndef CI
+	xdg-open '$(call escape,$(coverage_dir))/index.html' &> /dev/null
+endif
+
 .PHONY: install
 install: build
 	cmake --install '$(call escape,$(cmake_dir))'
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 6b9cddf..c26fe31 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -5,6 +5,12 @@ add_compile_options(-std=c17 -Wpedantic -Wall -Wextra $<$<NOT:$<CONFIG:Debug>>:-
 # any features macros defined at all, and prepare to be amazed!
 add_compile_definitions(_GNU_SOURCE)
 
+option(COVERAGE "Enable line coverage analysis")
+if(COVERAGE)
+    add_compile_options(--coverage -fprofile-update=atomic)
+    add_link_options(--coverage)
+endif()
+
 # Valgrind on Ubuntu Focal doesn't like DWARF version 5 debug info generated
 # by Clang 14.
 if("${CMAKE_C_COMPILER_ID}" STREQUAL "Clang")
-- 
cgit v1.2.3