add -v/--verbose option to see more output

Summary: I found this useful to see where manifests resolve to when they are already built

Reviewed By: HarveyHunt

Differential Revision: D32644308

fbshipit-source-id: b796cb67f154177fbac1093290d97fe5aab6b20c

build/fbcode_builder/getdeps.py

@@ -553,6 +553,8 @@ class BuildCmd(ProjectCmdBase):
                     # Only populate the cache from continuous build runs
                     if args.schedule_type == "continuous":
                         cached_project.upload()
+                elif args.verbose:
+                    print("found good %s" % built_marker)
 
             install_dirs.append(inst_dir)
 
@@ -1029,6 +1031,13 @@ def parse_args():
         action="store_true",
         default=False,
     )
+    add_common_arg(
+        "-v",
+        "--verbose",
+        help="Print more output",
+        action="store_true",
+        default=False,
+    )
     add_common_arg(
         "--lfs-path",
         help="Provide a parent directory for lfs when fbsource is unavailable",