Run provisioning after package install

scripts/classroom-provision

@@ -18,12 +18,14 @@ log() {
 
 log "starting"
 
+chrome_ok=true
+
 if /usr/local/bin/classroom-chrome-setup; then
     :
 else
-    log "WARNING: Google Chrome is not installed. The Browser button will"
-    log "WARNING: not work until this succeeds. Retrying at the next boot,"
-    log "WARNING: or run: sudo classroom-chrome-setup"
+    chrome_ok=false
+    log "WARNING: Google Chrome is not installed yet."
+    log "WARNING: Provisioning will retry automatically."
 fi
 
 # DVD codecs are only fetched for rooms that actually have a drive.
@@ -38,4 +40,10 @@ fi
 log "finished"
 
 # Provisioning is best-effort by design.
-exit 0
+# Chrome is required for a usable classroom. Returning failure here does
+# not block boot; systemd retries this oneshot service in the background.
+if [[ "$chrome_ok" != true ]]; then
+    exit 1
+fi
+
+exit 0