make: gather code coverage and send report to coveralls

1. https://coveralls.io/github/tarantool/expirationd

.github/workflows/fast_testing.yaml

@@ -24,6 +24,10 @@ jobs:
           - '2.6'
           - '2.7'
           - '2.8'
+        coveralls: [false]
+        include:
+          - tarantool: '2.8'
+            coveralls: true
 
     runs-on: ubuntu-latest
     steps:
@@ -40,17 +44,25 @@ jobs:
         id: cache-rocks
         with:
           path: .rocks/
-          key: cache-rocks-${{ matrix.tarantool }}-04
+          key: cache-rocks-${{ matrix.tarantool }}-06
 
       - name: Install requirements
         run: |
           tarantoolctl rocks install luatest 0.5.0
           tarantoolctl rocks install luacheck 0.26.0
+          tarantoolctl rocks install luacov 0.13.0-1
+          tarantoolctl rocks install luacov-coveralls 0.2.3-1 --server=http://luarocks.org
           tarantoolctl rocks make
         if: steps.cache-rocks.outputs.cache-hit != 'true'
 
       - run: echo $PWD/.rocks/bin >> $GITHUB_PATH
 
       - run: make check
 
-      - run: make test
+      - run: make coverage
+
+      - name: Send code coverage to coveralls.io
+        run: make coveralls
+        if: ${{ matrix.coveralls }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.gitignore

@@ -3,3 +3,6 @@
 *.xlog
 *.log
 VERSION
+luacov.stats.out
+luacov.report.out
+tags

Makefile

@@ -6,6 +6,14 @@ PROJECT_DIR := $(patsubst %/,%,$(dir $(MAKEFILE_PATH)))
 
 SHELL := $(shell which bash) # Required for brace expansion used in a clean target.
 
+# This way everything works as expected ever for
+# `make -C /path/to/project` or
+# `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
+
 CLEANUP_FILES  = tarantool.log
 CLEANUP_FILES += *.index
 CLEANUP_FILES += *.run
@@ -39,5 +47,16 @@ test:
 	INDEX_TYPE='TREE' ./test.lua
 	rm -rf ${CLEANUP_FILES}
 
+$(LUACOV_STATS): test
+
+coverage: $(LUACOV_STATS)
+	sed -i -e 's@'"$$(realpath .)"'/@@' $(LUACOV_STATS)
+	cd $(PROJECT_DIR) && luacov expirationd.lua
+	grep -A999 '^Summary' $(LUACOV_REPORT)
+
+coveralls: $(LUACOV_STATS)
+	echo "Send code coverage data to the coveralls.io service"
+	luacov-coveralls --include ^expirationd --verbose --repo-token ${GITHUB_TOKEN}
+
 clean:
 	rm -rf ${CLEANUP_FILES}

README.md

@@ -1,3 +1,8 @@
+[![Run tests](https://github.com/tarantool/expirationd/actions/workflows/test_on_push.yaml/badge.svg)](https://github.com/tarantool/expirationd/actions/workflows/test_on_push.yaml)
+<a href='https://coveralls.io/github/tarantool/expirationd?branch=master'>
+<img src='https://coveralls.io/repos/github/tarantool/expirationd/badge.svg?branch=master' alt='Coverage Status' />
+</a>
+
 # expirationd -  data expiration with custom quirks.
 
 This package can turn Tarantool into a persistent memcache replacement,