Add channel version check

ci/test-sanity.sh

@@ -25,4 +25,29 @@ echo
 _ ci/nits.sh
 _ ci/check-ssh-keys.sh
 
+
+# Ensure the current channel version is not equal ("greater") than
+# the version of the latest tag
+if [[ -z $CI_TAG ]]; then
+  echo "--- channel version check"
+  (
+    eval "$(ci/channel-info.sh)"
+
+    if [[ -n $CHANNEL_LATEST_TAG ]]; then
+      source scripts/read-cargo-variable.sh
+
+      version=$(readCargoVariable version "version/Cargo.toml")
+      echo "version: v$version"
+      echo "latest channel tag: $CHANNEL_LATEST_TAG"
+
+      if [[ $CHANNEL_LATEST_TAG = v$version ]]; then
+        echo "Error: please run ./scripts/increment-cargo-version.sh"
+        exit 1
+      fi
+    else
+      echo "Skipped. CHANNEL_LATEST_TAG (CHANNEL=$CHANNEL) unset"
+    fi
+  )
+fi
+
 echo --- ok