workflows:feature - add go mod tidy check (#904)

Now runs a check to see if go.sum file diffs from current version from one generated by go mod tidy command

Signed-off-by: Ian Cardoso <ian.cardoso@zup.com.br>

.github/workflows/go-tidy.yml

@@ -0,0 +1,33 @@
+# Copyright 2021 ZUP IT SERVICOS EM TECNOLOGIA E INOVACAO SA
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: Go Tidy
+
+on:
+  push:
+    branches: [ main ]
+  pull_request:
+jobs:
+  go-mod-tidy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repo
+        uses: actions/checkout@v2
+      - name: Set up Golang
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.17
+      ## Run go mod tidy and then check if there was a diff. If so, fail the check.
+      - name: Check go mod tidy diff
+        run: if [ $(go mod tidy && git diff | wc -l) -gt 0 ]; then git diff && exit 1; fi