Remove Coveralls integration due to outages

Before this patch, the project reported code coverage to Coveralls
after each build, but the service’s outages caused CI failures.

After this patch, all Coveralls-related configuration, dependencies,
and CI steps have been removed to ensure builds run reliably
without external coverage reporting interruptions.

Author: hackallcode

.github/workflows/test.yml

@@ -6,6 +6,10 @@ on:
 env:
   GIT_CONFIG_GLOBAL: "/root/.gitconfig" # fix path in container (https://github.com/actions/runner/issues/2033)
 
+defaults:
+  run:
+    shell: "bash"
+
 jobs:
 
   ### LINT ###
@@ -47,14 +51,16 @@ jobs:
       - uses: "actions/checkout@v4"
 
       - name: "Measuring test coverage"
-        run: "make test/cover"
-
-      - name: "Upload coverage to Coveralls"
-        uses: "coverallsapp/github-action@v2"
-        with:
-          github-token: ${{ secrets.GITHUB_TOKEN }}
-          file: "coverage.out"
-          format: "golang"
+        run: "make test/cover | tee coverage.log; exit ${PIPESTATUS[0]}"
+
+      - name: "Upload coverage to badge"
+        if: "${{ github.ref_name == github.event.repository.default_branch }}"
+        env:
+          BADGEN_TOKEN: ${{ secrets.BADGEN_TOKEN }}
+        run: |
+          RESULT=$(grep -E 'total:\s+\(statements\)\s+[0-9]+\.[0-9]+%' coverage.log | grep -Eo '[0-9]+\.[0-9]+%' | sed 's/%/%25/g')
+          curl -LX PUT --header "Authorization: Bearer ${BADGEN_TOKEN}" \
+            "https://badgen.net/memo/tarantool-sdvg-coverage-master/coverage/${RESULT}/green"
 
   ### PERFORMANCE ###
 

README.md

@@ -16,9 +16,9 @@
 [pre-release-badge]: https://badgen.net/static/pre-release/latest/orange?color=purple
 [pre-release-url]: https://github.com/tarantool/sdvg/releases/tag/latest/
 [actions-badge]: https://badgen.net/github/checks/tarantool/sdvg/master
-[actions-url]: https://github.com/tarantool/sdvg/actions
-[test-coverage-badge]: https://badgen.net/coveralls/c/github/tarantool/sdvg/master
-[test-coverage-url]: https://coveralls.io/github/tarantool/sdvg?branch=master
+[actions-url]: https://github.com/tarantool/sdvg/actions?query=branch%3Amaster
+[test-coverage-badge]: https://badgen.net/memo/tarantool-sdvg-coverage-master
+[test-coverage-url]: https://github.com/tarantool/sdvg/actions?query=branch%3Amaster
 [language-badge]: https://badgen.net/static/language/go/blue
 [language-url]: https://github.com/tarantool/sdvg/search?l=go
 [license-badge]: https://badgen.net/github/license/tarantool/sdvg?color=cyan

README.ru.md

@@ -16,9 +16,9 @@
 [pre-release-badge]: https://badgen.net/static/pre-release/latest/orange?color=purple
 [pre-release-url]: https://github.com/tarantool/sdvg/releases/tag/latest/
 [actions-badge]: https://badgen.net/github/checks/tarantool/sdvg/master
-[actions-url]: https://github.com/tarantool/sdvg/actions
-[test-coverage-badge]: https://badgen.net/coveralls/c/github/tarantool/sdvg/master
-[test-coverage-url]: https://coveralls.io/github/tarantool/sdvg?branch=master
+[actions-url]: https://github.com/tarantool/sdvg/actions?query=branch%3Amaster
+[test-coverage-badge]: https://badgen.net/memo/tarantool-sdvg-coverage-master
+[test-coverage-url]: https://github.com/tarantool/sdvg/actions?query=branch%3Amaster
 [language-badge]: https://badgen.net/static/language/go/blue
 [language-url]: https://github.com/tarantool/sdvg/search?l=go
 [license-badge]: https://badgen.net/github/license/tarantool/sdvg?color=cyan