Use matrix build for replica test CI

.github/workflows/replica-tests.yml

@@ -6,6 +6,9 @@ jobs:
   build:
 
     runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        version: [mysql-5.5.62,mysql-5.6.43,mysql-5.7.25,mysql-8.0.16]
 
     steps:
     - uses: actions/checkout@v2
@@ -16,4 +19,6 @@ jobs:
         go-version: 1.14
 
     - name: migration tests
+      env:
+        TEST_MYSQL_VERSION: ${{ matrix.version }}
       run:  script/cibuild-gh-ost-replica-tests

script/cibuild-gh-ost-replica-tests

@@ -59,12 +59,16 @@ test_mysql_version() {
   find sandboxes -name "stop_all" | bash
 }
 
-echo "Building..."
-. script/build
-# Test all versions:
-find gh-ost-ci-env/mysql-tarballs/ -name "*.tar.gz" | while read f ; do basename $f ".tar.gz" ; done | sort -r | while read mysql_version ; do
-  echo "found MySQL version: $mysql_version"
-done
-find gh-ost-ci-env/mysql-tarballs/ -name "*.tar.gz" | while read f ; do basename $f ".tar.gz" ; done | sort -r | while read mysql_version ; do
-  test_mysql_version "$mysql_version"
-done
+# TEST_MYSQL_VERSION is set by the replica-tests CI job
+if [ -z "$TEST_MYSQL_VERSION" ]; then
+  # Test all versions:
+  find gh-ost-ci-env/mysql-tarballs/ -name "*.tar.gz" | while read f ; do basename $f ".tar.gz" ; done | sort -r | while read mysql_version ; do
+    echo "found MySQL version: $mysql_version"
+  done
+  find gh-ost-ci-env/mysql-tarballs/ -name "*.tar.gz" | while read f ; do basename $f ".tar.gz" ; done | sort -r | while read mysql_version ; do
+    test_mysql_version "$mysql_version"
+  done
+else
+  echo "found MySQL version: $MYSQL_VERSION"
+  test_mysql_version "$MYSQL_VERSION"
+fi