Re: [PATCH 1/1] fast-import: checkpoint: dump branches/tags/marks even if object_count==0

On Thu, Sep 28, 2017 at 3:35 AM, Junio C Hamano [off-list ref] wrote:

"Eric Rannaud" [off-list ref] writes:

quoted

+# The commands in input_file should not produce any output on the file
+# descriptor set with --cat-blob-fd (or stdout if unspecified).

Thanks for documenting this.  Swapping the order of starting
fast-import and feeding its input (which is one change in this
version relative to the previous one) alone would not help, because
in the updated order in this patch, nobody is reading from
fast-import until the parent process finishes feeding it.

Darn. That's correct, on a platform with blocking pipes it would not
work. I will start the input cat in the background (so it may block
while writing), before reading from the output of fast-import.