Github Actions run unit tests. [ci skip]

.github/workflows/ci-scripts/docker.sh

@@ -6,3 +6,31 @@ scons wesnoth wesnothd campaignd boost_unit_tests build=release \
     nls=false enable_lto=true sanitize="" jobs=2 --debug=time
 
 ls -Al
+
+# print given message ($1) and execute given command; sets EXIT_VAL on failure
+execute() {
+    local message=$1; shift
+    printf 'Executing %s\n' "$message"
+    if "$@"; then
+        : # success
+    else
+        EXIT_VAL=$?
+        error "$message failed! ($*)"
+    fi
+}
+
+checkindent() {
+    make -C data/tools reindent &&
+    git diff-index --quiet HEAD
+}
+
+execute "WML validation" ./utils/travis/schema_validation.sh
+execute "WML indentation check" checkindent
+execute "WML tests" ./run_wml_tests -g -v -c -t "$WML_TEST_TIME"
+execute "Play tests" ./utils/travis/play_test_executor.sh
+execute "Boost unit tests" ./utils/travis/test_executor.sh
+
+if [ -f "errors.log" ]; then
+    error $'\n*** \n*\n* Errors reported in wml unit tests, here is errors.log...\n*\n*** \n'
+    cat errors.log
+fi