[reclient] Only show shutdown msg if ctrl-C end the build

Bug: b/300284667
Change-Id: I28151a974cd20cb5ec7a789cf7f7cd0c926b4486
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/4864734
Reviewed-by: Junji Watanabe <jwata@google.com>
Commit-Queue: Ben Segall <bentekkie@google.com>
Auto-Submit: Ben Segall <bentekkie@google.com>

autosiso.py

@@ -62,11 +62,12 @@ def main(argv):
             '-project=',
             '-reapi_instance=',
         ] + argv[1:]
-        return siso.main(argv)
+        try:
+            return siso.main(argv)
+        except KeyboardInterrupt:
+            print("Shutting down reproxy...", file=sys.stderr)
+            return 1
 
 
 if __name__ == '__main__':
-    try:
-        sys.exit(main(sys.argv))
-    except KeyboardInterrupt:
-        sys.exit(1)
+    sys.exit(main(sys.argv))

ninja_reclient.py

@@ -22,6 +22,7 @@ def main(argv):
         try:
             return ninja.main(argv)
         except KeyboardInterrupt:
+            print("Shutting down reproxy...", file=sys.stderr)
             return 1
 
 

reclient_helper.py

@@ -274,7 +274,6 @@ def build_context(argv, tool):
     try:
         yield
     finally:
-        print("Shutting down reproxy...", file=sys.stderr)
         start = time.time()
         stop_reproxy(reclient_cfg, reclient_bin_dir)
         if os.environ.get('NINJA_SUMMARIZE_BUILD') == '1':