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format-patch: use 'origin' as start of current-series-range when known

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When formatting a patch series over `origin..HEAD`, one would expect
that range to be used as the current-series-range when computing a
range-diff between the previous and current versions of a patch series.
However, infer_range_diff_ranges() ignores `origin..HEAD` when
--range-diff=<prev> specifies a single revision rather than a range, and
instead unexpectedly computes the current-series-range based upon
<prev>. Address this anomaly by unconditionally using `origin..HEAD` as
the current-series-range regardless of <prev> as long as `origin` is
known, and only fall back to basing current-series-range on <prev> when
`origin` is not known.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Eric Sunshine 2020-09-08 03:16:10 -04:00 committed by Junio C Hamano
parent 72a7239016
commit 07a7f8debf
1 changed files with 12 additions and 8 deletions
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20
builtin/log.c
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@ -1595,16 +1595,20 @@ static void infer_range_diff_ranges(struct strbuf *r1,
struct commit *head)
{
const char *head_oid = oid_to_hex(&head->object.oid);
int prev_is_range = !!strstr(prev, "..");
if (!strstr(prev, "..")) {
strbuf_addf(r1, "%s..%s", head_oid, prev);
strbuf_addf(r2, "%s..%s", prev, head_oid);
} else if (!origin) {
die(_("failed to infer range-diff ranges"));
} else {
if (prev_is_range)
strbuf_addstr(r1, prev);
strbuf_addf(r2, "%s..%s",
oid_to_hex(&origin->object.oid), head_oid);
else
strbuf_addf(r1, "%s..%s", head_oid, prev);
if (origin)
strbuf_addf(r2, "%s..%s", oid_to_hex(&origin->object.oid), head_oid);
else if (prev_is_range)
die(_("failed to infer range-diff origin of current series"));
else {
warning(_("using '%s' as range-diff origin of current series"), prev);
strbuf_addf(r2, "%s..%s", prev, head_oid);
}
}