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ll-merge: make callers responsible for showing warnings

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Since some callers may want to send warning messages to somewhere other
than stdout/stderr, stop printing "warning: Cannot merge binary files"
from ll-merge and instead modify the return status of ll_merge() to
indicate when a merge of binary files has occurred.  Message printing
probably does not belong in a "low-level merge" anyway.

This commit continues printing the message as-is, just from the callers
instead of within ll_merge().  Future changes will start handling the
message differently in the merge-ort codepath.

There was one special case here: the callers in rerere.c do NOT check
for and print such a message; since those code paths explicitly skip
over binary files, there is no reason to check for a return status of
LL_MERGE_BINARY_CONFLICT or print the related message.

Note that my methodology included first modifying ll_merge() to return
a struct, so that the compiler would catch all the callers for me and
ensure I had modified all of them.  After modifying all of them, I then
changed the struct to an enum.

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Elijah Newren
2022-02-02 02:37:30 +00:00
committed by Junio C Hamano
parent 7b90ab467a
commit 35f6967161
9 changed files with 63 additions and 32 deletions
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5
merge-recursive.c
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@@ -1044,7 +1044,7 @@ static int merge_3way(struct merge_options *opt,
mmfile_t orig, src1, src2;
struct ll_merge_options ll_opts = {0};
char *base, *name1, *name2;
int merge_status;
enum ll_merge_result merge_status;
ll_opts.renormalize = opt->renormalize;
ll_opts.extra_marker_size = extra_marker_size;
@@ -1090,6 +1090,9 @@ static int merge_3way(struct merge_options *opt,
merge_status = ll_merge(result_buf, a->path, &orig, base,
&src1, name1, &src2, name2,
opt->repo->index, &ll_opts);
if (merge_status == LL_MERGE_BINARY_CONFLICT)
warning("Cannot merge binary files: %s (%s vs. %s)",
a->path, name1, name2);
free(base);
free(name1);