Add module update CI

Author: Apache Mynewt Bot

.travis.yml

@@ -0,0 +1,13 @@
+language: go
+go:
+- '1.13'
+git:
+  depth: false
+before_install:
+- export GOPATH=$HOME/gopath
+script:
+- cp update_modules.sh $HOME
+- "$HOME/update_modules.sh"
+env:
+  global:
+    secure: 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

update_modules.sh

@@ -0,0 +1,84 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you 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.
+
+BRANCH="update-modules"
+
+pushd $TRAVIS_BUILD_DIR
+
+#debug
+pwd
+ls
+
+# remove any update-modules branch
+git branch -D "${BRANCH}" 2>/dev/null
+
+git remote add upstream https://github.com/apache/mynewt-mcumgr-cli
+[[ $? -ne 0 ]] && exit 1
+
+git fetch upstream
+[[ $? -ne 0 ]] && exit 1
+
+# must be running on master to find modules that were updated!
+git reset --hard upstream/master
+
+is_mod=0
+modules=()
+while read line; do
+    if [[ "${line}" == "require (" ]]; then
+        is_mod=1
+    elif [[ $is_mod -eq 1 && "${line}" == ")" ]]; then
+        is_mod=0
+        break
+    elif [[ $is_mod -eq 1 ]]; then
+        module="$(echo ${line} | cut -d' ' -f1)"
+        modules[${#modules[*]}]=$module
+    fi
+done <go.mod
+
+pushd mcumgr
+for module in ${modules[*]}; do
+    go get -v -u $module
+done
+popd
+
+git diff --quiet
+if [[ $? -eq 0 ]]; then
+    echo "No changes detected."
+    exit 0
+fi
+
+# Check that still builds...
+pushd mcumgr
+go build -v
+[[ $? -ne 0 ]] && exit 1
+popd
+
+git checkout -b "${BRANCH}"
+[[ $? -ne 0 ]] && exit 1
+
+git commit -m "Update dependencies (automated)" go.mod go.sum
+
+# Add new repo that has a valid write permission token
+git remote add writable https://${GH_TOKEN}@github.com/apache-mynewt-bot/mynewt-mcumgr-cli.git
+git push writable ${BRANCH} --force
+[[ $? -ne 0 ]] && exit 1
+
+# Create PR through GH API
+curl -H "Content-Type: application/json" \
+     -H "authToken: ${GH_TOKEN}" \
+     --data '{"title":"Update dependencies","body":"New dependencies found!","head":"apache-mynewt-bot:update-modules","base":"master"}' \
+     https://api.github.com/repos/apache/mynewt-mcumgr-cli/pulls