From 7d5b7e13a6e18e188627c1cb1db79fba48c0d9c7 Mon Sep 17 00:00:00 2001
From: Naeem Akhter <akhternaeem@gmail.com>
Date: Fri, 6 Aug 2021 18:24:41 +0500
Subject: [PATCH] PG-218: Add Coverall code coverage to pg_stat_monitor.

Added 'Coverall' (https://coveralls.io) code coverage to pg_stat_monitor repo so that in future we don't have to perform this activity manually. Secondly, it will also make sure that code coverage detailed report link and status is readily available on repos github main page for each checkin (PR & Push), eventually helping in development velocity.
---
 .github/workflows/coverage_test.yml | 68 +++++++++++++++++++++++++++++
 README.md                           |  2 +
 2 files changed, 70 insertions(+)
 create mode 100644 .github/workflows/coverage_test.yml

diff --git a/.github/workflows/coverage_test.yml b/.github/workflows/coverage_test.yml
new file mode 100644
index 0000000..55304c4
--- /dev/null
+++ b/.github/workflows/coverage_test.yml
@@ -0,0 +1,68 @@
+name: coverage-test
+on: ["push", "pull_request"]
+
+jobs:
+  build:
+    name: coverage-test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Clone postgres repository
+        uses: actions/checkout@v2
+        with:
+          repository: 'postgres/postgres'
+          ref: 'REL_13_STABLE'
+
+      - name: Clone pg_stat_monitor repository
+        uses: actions/checkout@v2
+        with:
+          path: 'src/pg_stat_monitor'
+          ref: 'master'
+
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt purge postgresql-client-common postgresql-common postgresql postgresql*
+          sudo apt-get install libreadline6-dev systemtap-sdt-dev zlib1g-dev libssl-dev libpam0g-dev python-dev bison flex libipc-run-perl git lcov -y
+          sudo rm -rf /var/lib/postgresql/
+          sudo rm -rf /var/log/postgresql/
+          sudo rm -rf /etc/postgresql/
+          sudo rm -rf /usr/lib/postgresql
+          sudo rm -rf /usr/include/postgresql
+          sudo rm -rf /usr/share/postgresql
+          sudo rm -rf /etc/postgresql
+          sudo rm -f /usr/bin/pg_config
+      - name: Create pgsql dir
+        run: mkdir -p /opt/pgsql
+
+      - name: Build postgres
+        run: |
+          export PATH="/opt/pgsql/bin:$PATH"
+          ./configure --enable-coverage --enable-tap-tests --prefix=/opt/pgsql
+           make
+           make install
+      - name: Start postgresql cluster
+        run: |
+          export PATH="/opt/pgsql/bin:$PATH"
+          /opt/pgsql/bin/initdb -D /opt/pgsql/data
+          /opt/pgsql/bin/pg_ctl -D /opt/pgsql/data -l logfile start
+      - name: Build pg_stat_monitor
+        run: |
+          export PATH="/opt/pgsql/bin:$PATH"
+          sudo cp /opt/pgsql/bin/pg_config /usr/bin
+          make USE_PGXS=1
+          make USE_PGXS=1 install 
+        working-directory: src/pg_stat_monitor/
+
+      - name: Start pg_stat_monitor_tests & Run code coverage 
+        run: |
+          /opt/pgsql/bin/pg_ctl -D /opt/pgsql/data -l logfile stop
+          echo "shared_preload_libraries = 'pg_stat_monitor'" >> /opt/pgsql/data/postgresql.conf
+          /opt/pgsql/bin/pg_ctl -D /opt/pgsql/data -l logfile start
+          make installcheck
+          make coverage-html
+          lcov --capture --directory . --output-file coverage/lcov.info
+          pip install cpp-coveralls
+          export COVERALLS_REPO_TOKEN="${{ secrets.COVERALL_PG_STAT_MONITOR_TOKEN }}"
+          coveralls --verbose
+        working-directory: src/pg_stat_monitor/
+
diff --git a/README.md b/README.md
index 1e8d8e7..263ea19 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,8 @@
 ![pg13-test](https://github.com/percona/pg_stat_monitor/workflows/pg13-test/badge.svg)
 ![pg14-test](https://github.com/percona/pg_stat_monitor/workflows/pg14-test/badge.svg)
 
+[![Coverage Status](https://coveralls.io/repos/github/percona/pg_stat_monitor/badge.svg)](https://coveralls.io/github/percona/pg_stat_monitor)
+
 ## What is pg_stat_monitor?
 
 The **pg_stat_monitor** is a **Query Performance Monitoring** tool for [Percona Distribution for PostgreSQL](https://www.percona.com/software/postgresql-distribution) and PostgreSQL. **pg_stat_monitor** is based on PostgreSQL's contrib module ``pg_stat_statements``. pg_stat_statements provides the basic statistics, which is sometimes not enough. The major shortcoming in pg_stat_statements is that it accumulates all the queries and their statistics and does not provide aggregated statistics nor histogram information. In this case, a user needs to calculate the aggregate which is quite expensive.