PG-433: Codecov code coverage with PGSM GH repo (#279)

1) Updated code coverage workflow with required changes so that we point to
Codecov onwards for coverage stats.
2) Updated README.md file so that badge for Code Coverage, points to CodeCov
coverage stats for PGSM.
3) Added .DS_STORE to .gitignore file.

.github/workflows/code-coverage-test.yml

@@ -1,12 +1,7 @@
-name: coverage_test
-on:
-  pull_request:
-    types:
-      - closed 
+name: code-coverage-test
+on: ["push", "pull_request"]
 
 jobs:
-  if_merged:
-    if: github.event.pull_request.merged == true
   build:
     name: coverage-test
     runs-on: ubuntu-latest
@@ -96,13 +91,19 @@ jobs:
         run: |
           make installcheck
           /usr/lib/postgresql/14/bin/psql -d postgres -p 5432 -c "\list"
-          make coverage-html
-          lcov --capture --directory . --output-file coverage/lcov.info
-          pip install cpp-coveralls
-          export COVERALLS_REPO_TOKEN="${{ secrets.COVERALL_PG_STAT_MONITOR_TOKEN }}"
-          coveralls --verbose
+          gcov -abcfu pg_stat_monitor.c
+          gcov -abcfu guc.c
+          gcov -abcfu hash_query.c
+          sudo chmod -R ugo+rwx *.gcov*
         working-directory: src/pg_stat_monitor/
 
+      - name: Upload
+        uses: codecov/codecov-action@v2
+        with:
+          verbose: true
+          working-directory: ./src/pg_stat_monitor
+          files: ./pg_stat_monitor.c.gcov,./hash_query.c.gcov,./guc.c.gcov
+
       - name: Change dir permissions on fail
         if: ${{ failure() }}
         run: |

.gitignore

@@ -52,3 +52,6 @@ dkms.conf
 
 ## IDE
 .idea
+
+## DS_Store
+*.DS_Store

README.md

@@ -3,8 +3,7 @@
 ![PostgreSQL-13](https://github.com/percona/pg_stat_monitor/workflows/postgresql-13-build/badge.svg) ![PostgreSQL-13-Package](https://github.com/percona/pg_stat_monitor/workflows/postgresql-13-package/badge.svg)
 ![PostgreSQL-14](https://github.com/percona/pg_stat_monitor/workflows/postgresql-14-build/badge.svg) ![PostgreSQL-14-Package](https://github.com/percona/pg_stat_monitor/workflows/postgresql-14-package/badge.svg)
 
-[![Coverage Status](https://coveralls.io/repos/github/percona/pg_stat_monitor/badge.svg?branch=main)](https://coveralls.io/github/percona/pg_stat_monitor?branch=main)
-
+[![Code coverage](https://codecov.io/gh/percona/pg_stat_monitor/branch/main/graph/badge.svg)](https://codecov.io/gh/percona/pg_stat_monitor)
 # pg_stat_monitor: Query Performance Monitoring Tool for PostgreSQL
 
 ## Table of Contents