Re: [PATCH v3] sha1_file: pass empty buffer to index empty file

On Tue, May 19, 2015 at 2:11 PM, Junio C Hamano [off-list ref] wrote:

Subject: [PATCH] copy.c: make copy_fd() report its status silently

When copy_fd() function encounters errors, it emits error messages
itself, which makes it impossible for callers to take responsibility
for reporting errors, especially when they want to ignore certaion

s/certaion/certain/

errors.

Move the error reporting to its callers in preparation.

 - copy_file() and copy_file_with_time() by indirection get their
   own calls to error().

 - hold_lock_file_for_append(), when told to die on error, used to
   exit(128) relying on the error message from copy_fd(), but now it
   does its own die() instead.  Note that the callers that do not
   pass LOCK_DIE_ON_ERROR need to be adjusted for this change, but
   fortunately there is none ;-)

 - filter_buffer_or_fd() has its own error() already, in addition to
   the message from copy_fd(), so this will change the output but
   arguably in a better way.

Signed-off-by: Junio C Hamano <redacted>