[autoroller] Add info log around find_and_replace

R=borenet@google.com, jojwang@google.com

Bug: chromium:1475498
Change-Id: I98b0960c0bf785113bd4c33305ca723c29968a74
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/747822
Reviewed-by: Joe Gregorio <jcgregorio@google.com>
Auto-Submit: Josip Sokcevic <sokcevic@google.com>
Commit-Queue: Joe Gregorio <jcgregorio@google.com>
diff --git a/autoroll/go/repo_manager/common/version_file_common/BUILD.bazel b/autoroll/go/repo_manager/common/version_file_common/BUILD.bazel
index 9755a2b..ccd1fc3 100644
--- a/autoroll/go/repo_manager/common/version_file_common/BUILD.bazel
+++ b/autoroll/go/repo_manager/common/version_file_common/BUILD.bazel
@@ -13,6 +13,7 @@
         "//go/bazel",
         "//go/depot_tools/deps_parser",
         "//go/skerr",
+        "//go/sklog",
     ],
 )
 
diff --git a/autoroll/go/repo_manager/common/version_file_common/version_file_common.go b/autoroll/go/repo_manager/common/version_file_common/version_file_common.go
index 2c0acd3..de84422 100644
--- a/autoroll/go/repo_manager/common/version_file_common/version_file_common.go
+++ b/autoroll/go/repo_manager/common/version_file_common/version_file_common.go
@@ -11,6 +11,7 @@
 	"go.skia.org/infra/go/bazel"
 	"go.skia.org/infra/go/depot_tools/deps_parser"
 	"go.skia.org/infra/go/skerr"
+	"go.skia.org/infra/go/sklog"
 )
 
 func getUsingRegex(dep *config.VersionFileConfig, contents string) (string, string, error) {
@@ -211,7 +212,9 @@
 	}
 
 	// Handle find-and-replace.
+	sklog.Infof("find and replace count: \"%d\".", len(primaryDep.FindAndReplace))
 	for _, f := range primaryDep.FindAndReplace {
+		sklog.Infof("replacing: \"%s\".", f)
 		oldContents, err := getFile(ctx, f)
 		if err != nil {
 			return nil, skerr.Wrap(err)