Olga Telezhnaya <olyatelezhnaya@xxxxxxxxx> writes:
> Add return flag to format_ref_array_item, show_ref_array_item,
> get_ref_array_info and populate_value for further using.
> Need it to handle situations when item is broken but we can not invoke
> die() because we are in batch mode and all items need to be processed.
>
> Signed-off-by: Olga Telezhnaia <olyatelezhnaya@xxxxxxxxx>
> Mentored-by: Christian Couder <christian.couder@xxxxxxxxx>
> Mentored by: Jeff King <peff@xxxxxxxx>
> ---
> ref-filter.c | 21 +++++++++++++--------
> ref-filter.h | 4 ++--
> 2 files changed, 15 insertions(+), 10 deletions(-)
Makes sense as a preparatory step to pass the return status
throughout the call chain. The functions that actually will detect
issues should probably gain
/*
* a comment before the function
* that documents what it does and what values it returns
* to signal the failure.
*/
before them; those that only pass the errorcode through to the
caller do not necessarily have to, though.
> -void show_ref_array_item(struct ref_array_item *info,
> +int show_ref_array_item(struct ref_array_item *info,
> const struct ref_format *format)
> {
> struct strbuf final_buf = STRBUF_INIT;
> + int retval = format_ref_array_item(info, format, &final_buf);
>
> - format_ref_array_item(info, format, &final_buf);
> fwrite(final_buf.buf, 1, final_buf.len, stdout);
> strbuf_release(&final_buf);
> - putchar('\n');
> + if (!retval)
> + putchar('\n');
> + return retval;
This is questionable. Why does it write final_buf out regardless of
the return value, even though it refrains from writing terminating LF
upon non-zero return from the same function that prepared final_buf?
"Because final_buf is left unmodified when formatter returns an
error, and calling fwrite on an empty buffer ends up being a no-op"
is a wrong answer---it relies on having too intimate knowledge on
how the callee happens to work currently.
