ci: add view of code coverage

.github/workflows/testing.yaml

@@ -19,8 +19,9 @@ jobs:
       matrix:
         tarantool:
           - 'debug-master'
-          - '3.1'
-
+        include:
+          - tarantool: '3.1'
+            coveralls: true
     env:
       TNT_DEBUG_PATH: /home/runner/tnt-debug
 
@@ -102,3 +103,9 @@ jobs:
       - run: make check
 
       - run: make test
+
+      - name: Send code coverage to 'coveralls.io'
+        run: make coveralls
+        if: ${{ matrix.coveralls }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Makefile

@@ -3,6 +3,8 @@
 # `make -f /path/to/project/Makefile`.
 MAKEFILE_PATH := $(abspath $(lastword $(MAKEFILE_LIST)))
 PROJECT_DIR := $(patsubst %/,%,$(dir $(MAKEFILE_PATH)))
+LUACOV_REPORT := $(PROJECT_DIR)/luacov.report.out
+LUACOV_STATS := $(PROJECT_DIR)/luacov.stats.out
 
 # Look for .rocks/bin directories upward starting from the project
 # directory.
@@ -37,7 +39,21 @@ luacheck:
 test:
 	luatest -v --shuffle all:${SEED}
 
+$(LUACOV_STATS): test-coverage
+
+test-coverage:
+	luatest -v --coverage --shuffle all:${SEED}
+	sed -i -e 's@'"$$(realpath .)"'/@@' $(LUACOV_STATS)
+	cd $(PROJECT_DIR) && luacov roles/
+	grep -A999 '^Summary' $(LUACOV_REPORT)
+
+coveralls: $(LUACOV_STATS)
+	echo "Send code coverage data to the coveralls.io service"
+	luacov-coveralls --include ^roles --verbose --repo-token ${GITHUB_TOKEN}
+
 deps:
 	tt rocks install luatest 1.0.1
 	tt rocks install luacheck 0.26.0
+	tt rocks install luacov 0.13.0-1
+	tt rocks install luacov-coveralls 0.2.3-1 --server=http://luarocks.org
 	tt rocks make

README.md

@@ -1,3 +1,7 @@
+<a href='https://coveralls.io/github/tarantool/metrics-export-role?branch=master'>
+<img src='https://coveralls.io/repos/github/tarantool/metrics-export-role/badge.svg?branch=master' alt='Coverage Status' />
+</a>
+
 # metrics-export-role
 
 `roles.metrics-export` is a role for Tarantool 3. It allows to export metrics