Warn if the add-snippets input is used

Author: mbg

analyze/action.yml

@@ -31,6 +31,12 @@ inputs:
       memory available in the system (which for GitHub-hosted runners is 6GB for Linux, 5.5GB for Windows,
       and 13GB for macOS).
     required: false
+  add-snippets:
+    description: Does not have any effect.
+    required: false
+    default: "false"
+    deprecationMessage: >-
+      The input "add-snippets" is has been removed and no longer has any effect.
   skip-queries:
     description: If this option is set, the CodeQL database will be built but no queries will be run on it. Thus, no results will be produced.
     required: false

lib/analyze-action.js

@@ -324,6 +324,13 @@ async function run() {
     );
 
     if (actionsUtil.getRequiredInput("skip-queries") !== "true") {
+      // Warn if the removed `add-snippets` input is used.
+      if (actionsUtil.getOptionalInput("add-snippets") !== undefined) {
+        logger.warning(
+          "The `add-snippets` input has been removed and no longer has any effect.",
+        );
+      }
+
       runStats = await runQueries(
         outputDir,
         memory,