[PATCH v9 16/37] hooks: allow callers to capture output

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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@xxxxxxxxxx>
---

Notes:
    You can see this in practice in the conversions for some of the push hooks,
    like 'receive-pack'.

 hook.c | 3 ++-
 hook.h | 8 ++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/hook.c b/hook.c
index d48071bb1d..27da1fdb32 100644
--- a/hook.c
+++ b/hook.c
@@ -262,6 +262,7 @@ void run_hooks_opt_init_sync(struct run_hooks_opt *o)
 	o->dir = NULL;
 	o->feed_pipe = NULL;
 	o->feed_pipe_ctx = NULL;
+	o->consume_sideband = NULL;
 }
 
 void run_hooks_opt_init_async(struct run_hooks_opt *o)
@@ -437,7 +438,7 @@ int run_hooks(const char *hookname, struct run_hooks_opt *options)
 				   pick_next_hook,
 				   notify_start_failure,
 				   options->feed_pipe,
-				   NULL,
+				   options->consume_sideband,
 				   notify_hook_finished,
 				   &cb_data,
 				   "hook",
diff --git a/hook.h b/hook.h
index aba62d4112..f32189380a 100644
--- a/hook.h
+++ b/hook.h
@@ -78,6 +78,14 @@ struct run_hooks_opt
 	feed_pipe_fn feed_pipe;
 	void *feed_pipe_ctx;
 
+	/*
+	 * 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_sideband_fn consume_sideband;
+
 	/* Number of threads to parallelize across */
 	int jobs;
 
-- 
2.31.1.818.g46aad6cb9e-goog




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