hooks: allow callers to capture output

Some server-side hooks will require capturing output to send over
sideband instead of printing directly to stderr. Expose that capability.

Signed-off-by: Emily Shaffer <emilyshaffer@google.com>
Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/hook.h b/hook.h
index 78a1a44690..ae502178b9 100644
--- a/hook.h
+++ b/hook.h
@@ -80,6 +80,14 @@ struct run_hooks_opt
 	 * Only useful when using `run_hooks_opt.feed_pipe`, otherwise ignore it.
 	 */
 	void *feed_pipe_cb_data;
+
+	/*
+	 * Populate this to capture output and prevent it from being printed to
+	 * stderr. This will be passed directly through to
+	 * run_command:run_parallel_processes(). See t/helper/test-run-command.c
+	 * for an example.
+	 */
+	consume_output_fn consume_output;
 };
 
 #define RUN_HOOKS_OPT_INIT { \