throw warnings if action_install.sh is used and repo does not have 'arduino-library' tag in its topic

Author: hathach

.github/workflows/githubci.yml

@@ -8,8 +8,8 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v1
-    - uses: actions/setup-python@v1
+    - uses: actions/checkout@v3
+    - uses: actions/setup-python@v4
       with:
         python-version: '3.x'
     - name: pre-install

actions_install.sh

@@ -32,3 +32,12 @@ echo $GITHUB_WORKSPACE/bin >> $GITHUB_PATH
 curl -fsSL https://raw.githubusercontent.com/arduino/arduino-cli/master/install.sh | sh
 arduino-cli config init > /dev/null
 arduino-cli core update-index > /dev/null
+
+# warn if this library does not have arduino-library tag in its topic
+if [ $GITHUB_REPOSITORY != "adafruit/ci-arduino" ]; then
+  repo_topics=$(curl --request GET --url "https://api.github.com/repos/$GITHUB_REPOSITORY" | jq -r '.topics[]' | xargs)
+  if [[ ! $repo_topics =~ "arduino-library" ]]; then
+    echo "::warning::arduino-library is not found in this repo topics. Please add this tag in repo About"
+  fi
+fi
+