avoid showing repeated messages (#16118)

Sometimes we show hundreds of repeated messages in the logs, e.g.
"waiting for quiescence; 3 outputs outstanding". This just makes the
logs harder to read. Since we need to wait for the test to finish before
any of this is shown anyway, only log each message once and show a
little blurb about how often the message has been repeated.

(Note that for simplicity if the last message is repeated we don't show
the same blurb, but that should be okay since the last messages we're
logging are always different.)

Based on #16117 where I noticed
this, and I didn't want to rebase it to avoid conflicts.

sdk/nodejs/cmd/pulumi-language-nodejs/language_test.go

@@ -41,6 +41,9 @@ import (
 type hostEngine struct {
  pulumirpc.UnimplementedEngineServer
  t *testing.T
+
+ logRepeat int
+ previousMessage string
 }
 
 func (e *hostEngine) Log(_ context.Context, req *pulumirpc.LogRequest) (*pbempty.Empty, error) {
@@ -66,6 +69,17 @@ func (e *hostEngine) Log(_ context.Context, req *pulumirpc.LogRequest) (*pbempty
  }
  }
 
+ if e.previousMessage == message {
+ e.logRepeat++
+ return &pbempty.Empty{}, nil
+ }
+
+ if e.logRepeat > 1 {
+ e.t.Logf("Last message repeated %d times", e.logRepeat)
+ }
+ e.logRepeat = 1
+ e.previousMessage = message
+
  if req.StreamId != 0 {
  e.t.Logf("(%d) %s[%s]: %s", req.StreamId, sev, req.Urn, message)
  } else {

sdk/python/cmd/pulumi-language-python/language_test.go

@@ -43,6 +43,9 @@ import (
 type hostEngine struct {
  pulumirpc.UnimplementedEngineServer
  t *testing.T
+
+ logRepeat int
+ previousMessage string
 }
 
 func (e *hostEngine) Log(_ context.Context, req *pulumirpc.LogRequest) (*pbempty.Empty, error) {
@@ -68,6 +71,17 @@ func (e *hostEngine) Log(_ context.Context, req *pulumirpc.LogRequest) (*pbempty
  }
  }
 
+ if e.previousMessage == message {
+ e.logRepeat++
+ return &pbempty.Empty{}, nil
+ }
+
+ if e.logRepeat > 1 {
+ e.t.Logf("Last message repeated %d times", e.logRepeat)
+ }
+ e.logRepeat = 1
+ e.previousMessage = message
+
  if req.StreamId != 0 {
  e.t.Logf("(%d) %s[%s]: %s", req.StreamId, sev, req.Urn, message)
  } else {