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-rw-r--r--Documentation/gitattributes.txt4
1 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/gitattributes.txt b/Documentation/gitattributes.txt
index 3f4d1edb1f..976243a63e 100644
--- a/Documentation/gitattributes.txt
+++ b/Documentation/gitattributes.txt
@@ -516,7 +516,9 @@ the command pipe on exit. The filter is expected to detect EOF
and exit gracefully on its own. Git will wait until the filter
process has stopped.
-If you develop your own long running filter
+A long running filter demo implementation can be found in
+`contrib/long-running-filter/example.pl` located in the Git
+core repository. If you develop your own long running filter
process then the `GIT_TRACE_PACKET` environment variables can be
very helpful for debugging (see linkgit:git[1]).