kitchen: fix emission of annotations

go/src/infra/tools/kitchen/cook.go

 // Copyright 2016 The LUCI Authors. All rights reserved.
 // Use of this source code is governed under the Apache License, Version 2.0
 // that can be found in the LICENSE file.
 
 package main
 
 import (
         "encoding/json"
         "fmt"
         "io/ioutil"
@@ skipping 209 matching lines @@
         props, err := parseProperties(c.Properties, c.PropertiesFile)
         if err != nil {
                 fmt.Fprintf(os.Stderr, "could not parse properties: %s", err)
                 return 1
         }
 
         // Let infra_path recipe module know that we are using swarmbucket paths.
         // Relevant code:
         // https://chromium.googlesource.com/chromium/tools/depot_tools/+/248331450c05c59c8e966c806f00bd2475e36603/recipe_modules/infra_paths/api.py#12
         // https://chromium.googlesource.com/chromium/tools/depot_tools/+/248331450c05c59c8e966c806f00bd2475e36603/recipe_modules/infra_paths/path_config.py#57
+        if _, ok := props["path_config"]; ok {
+                fmt.Fprintln(os.Stderr, `"path_config" property must not be set; it is reserved by kitchen`)
+        }
         props["path_config"] = "swarmbucket"
 
         // If we're not using LogDog, send out annotations.
         bootstapSuccess := true
-        if !c.logdog.emitAnnotations() {
+        if c.logdog.emitAnnotations() {
                 if c.Timestamps {
                         annotateTime(ctx)
                 }
                 annotate("SEED_STEP", BootstrapStepName)
                 annotate("STEP_CURSOR", BootstrapStepName)
                 if c.Timestamps {
                         annotateTime(ctx)
                 }
                 annotate("STEP_STARTED")
                 defer func() {
@@ skipping 57 matching lines @@
 }
 
 func annotateTime(ctx context.Context) {
         timestamp := clock.Get(ctx).Now().Unix()
         annotate("CURRENT_TIMESTAMP", strconv.FormatInt(timestamp, 10))
 }
 
 func annotate(args ...string) {
         fmt.Printf("@@@%s@@@\n", strings.Join(args, "@"))
 }