feat: integrating openfoodfacts-server with codecov for unit test coverage

.github/workflows/codecov.yml

@@ -0,0 +1,28 @@
+name: Unit Test Coverage
+
+on: [push]
+jobs:
+  coverage:
+    name: unit test coverage
+    runs-on: ubuntu-latest
+    steps:
+       - uses: actions/checkout@master
+       # Before rebuilding the taxonomies, we do this to restore dates so we don't have to build all taxonomies
+       # Prior usage in .github/workflows/pull_request.yml
+       - name: rebuild taxonomies
+         run:  |
+          git ls-files taxonomies/ | xargs -I{} git log -1 --date=format:%Y%m%d%H%M.%S --format='touch -t %ad "{}"' "{}" | bash
+          make build_taxonomies
+       - uses: actions/checkout@master
+       - name: generate coverage results
+         run: make cover
+       - name: generate text file with results
+         if: always()
+         run: make coverage_txt
+       - name: use codecov
+         if: always()
+         run: make codecov
+       - uses: codecov/codecov-action@v3
+         if: always()
+         with:
+           files: cover_db/codecov.json

Makefile

@@ -134,6 +134,19 @@ tail:
 	@echo "🥫 Reading logs (Apache2, Nginx) …"
 	tail -f logs/**/*
 
+cover:
+	@echo "🥫 running …"
+	${DOCKER_COMPOSE_TEST} up -d memcached postgres mongodb
+	${DOCKER_COMPOSE_TEST} run --rm backend perl -I/opt/product-opener/lib -I/opt/perl/local/lib/perl5 /opt/product-opener/scripts/build_lang.pl
+	${DOCKER_COMPOSE_TEST} run --rm -e HARNESS_PERL_SWITCHES="-MDevel::Cover" backend prove -l tests/unit
+	${DOCKER_COMPOSE_TEST} stop
+
+codecov:
+	@echo "🥫 running …"
+	${DOCKER_COMPOSE_TEST} run --rm backend cover -report codecovbash
+
+coverage_txt:
+	${DOCKER_COMPOSE_TEST} run --rm backend cover
 
 #----------#
 # Services #

cpanfile

@@ -96,6 +96,9 @@ on 'test' => sub {
   requires 'HTTP::CookieJar::LWP';
   requires 'File::Tail';
   requires 'Test2::Plugin::UTF8';
+  requires 'Devel::Cover';
+  requires 'Devel::Cover::Report::Codecov';
+  requires 'Devel::Cover::Report::Codecovbash';
 };
 
 on 'develop' => sub {
@@ -104,6 +107,9 @@ on 'develop' => sub {
   requires 'Apache::DB', '>= 0.18, < 1.00'; # old non-working version also available as the Debian package libapache-db-perl 0.14
   requires 'Perl::Tidy';
   requires 'Perl::Critic';
+  requires 'Devel::Cover';
+  requires 'Devel::Cover::Report::Codecov';
+  requires 'Devel::Cover::Report::Codecovbash';
 };
 
 feature "off_server_dev_tools", "Optional development tools" => sub {