Update Go to 1.15 in Releases + Check Licenses CI (#1665)

* Uses go version 1.15 during releases.
* Adds automated license checks

.github/workflows/checkLicenses.yml

@@ -0,0 +1,41 @@
+# Copyright 2019 Google LLC
+#
+# 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: Check Licenses
+on:
+  push:
+    branches:
+      - master
+      - next
+  pull_request:
+    branches:
+      - master
+      - next
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Go 1.15
+        uses: actions/setup-go@v1
+        with:
+          go-version: 1.15
+      - run: |
+          ./scripts/create-licenses.sh
+      # Upload the licenses list so it's available if needed
+      - uses: actions/upload-artifact@v2
+        with:
+          name: Licenses
+          path: LICENSES.txt
+          retention-days: 7 # Reduce retention time from 90 days to 7

release/Dockerfile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.13-stretch
+FROM golang:1.15-stretch
 ENV CGO_ENABLED=0
 ENV GO111MODULE=on
 

release/Dockerfile.kpt-build

@@ -1,3 +1,3 @@
-FROM golang:1.13
+FROM golang:1.15
 RUN apt-get -qqy update && \
     apt-get install -qqy tar bzip2 gzip jq zip

release/gcloud/Dockerfile

@@ -12,7 +12,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-FROM golang:1.13-stretch AS build
+FROM golang:1.15-stretch AS build
 ENV CGO_ENABLED=0
 ENV GO111MODULE=on
 

scripts/create-licenses.sh

@@ -169,7 +169,7 @@ mv ${V2_LICENSE_DIR}/v2/LICENSE ${V2_LICENSE_DIR}
 
 # Loop through every vendored package
 mozilla_repos=""
-for PACKAGE in $(go list -m -json all | jq -r .Path | sort -f); do
+for PACKAGE in $(go list -mod=mod -m -json all | jq -r .Path | sort -f); do
   if [[ -e "staging/src/${PACKAGE}" ]]; then
     # echo "$PACKAGE is a staging package, skipping" > /dev/stderr
     continue