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range-diff: let '--abbrev' option takes effect

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As mentioned in 'git-range-diff.txt': "`git range-diff` also accepts the
regular diff options (see linkgit:git-diff[1])...", but '--abbrev' is not
in the "regular" scope.

In Git, the "abbrev" of an object may not be a fixed value in different
repositories, depending on the needs of the them(Linus mentioned in
e6c587c7 in 2016: "the Linux kernel project needs 11 to 12 hexdigits"
at that time ), that's why a user may want to display abbrev according
to a specified length.

Although a similar effect can be achieved through configuration (like:
git -c core.abbrev=<abbrev>), but based on ease of use (many users may not
know that the -c option can be specified) and the description in existing
document, supporting users to directly use '--abbrev', could be a good way.

Signed-off-by: Teng Long <dyroneteng@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Teng Long 2023-02-20 22:24:44 +08:00 committed by Junio C Hamano
parent d9d677b2d8
commit 2b15969f61
2 changed files with 39 additions and 4 deletions
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11
range-diff.c
View File

@ -383,11 +383,14 @@ static void output_pair_header(struct diff_options *diffopt,
const char *color_new = diff_get_color_opt(diffopt, DIFF_FILE_NEW);
const char *color_commit = diff_get_color_opt(diffopt, DIFF_COMMIT);
const char *color;
char abbrev = diffopt->abbrev;
if (abbrev < 0)
abbrev = DEFAULT_ABBREV;
if (!dashes->len)
strbuf_addchars(dashes, '-',
strlen(find_unique_abbrev(oid,
DEFAULT_ABBREV)));
strlen(find_unique_abbrev(oid, abbrev)));
if (!b_util) {
color = color_old;
@ -409,7 +412,7 @@ static void output_pair_header(struct diff_options *diffopt,
strbuf_addf(buf, "%*s: %s ", patch_no_width, "-", dashes->buf);
else
strbuf_addf(buf, "%*d: %s ", patch_no_width, a_util->i + 1,
find_unique_abbrev(&a_util->oid, DEFAULT_ABBREV));
find_unique_abbrev(&a_util->oid, abbrev));
if (status == '!')
strbuf_addf(buf, "%s%s", color_reset, color);
@ -421,7 +424,7 @@ static void output_pair_header(struct diff_options *diffopt,
strbuf_addf(buf, " %*s: %s", patch_no_width, "-", dashes->buf);
else
strbuf_addf(buf, " %*d: %s", patch_no_width, b_util->i + 1,
find_unique_abbrev(&b_util->oid, DEFAULT_ABBREV));
find_unique_abbrev(&b_util->oid, abbrev));
commit = lookup_commit_reference(the_repository, oid);
if (commit) {

32
t/t3206-range-diff.sh
View File

@ -33,6 +33,26 @@ test_expect_success 'setup' '
u3 sha256:736c4bc
u4 sha256:673e77d
# topic (abbrev=10)
t1_abbrev sha1:4de457d2c0
t2_abbrev sha1:fccce22f8c
t3_abbrev sha1:147e64ef53
t4_abbrev sha1:a63e992599
t1_abbrev sha256:b89f8b9092
t2_abbrev sha256:5f12aadf34
t3_abbrev sha256:ea8b273a6c
t4_abbrev sha256:14b73361fc
# unmodified (abbrev=10)
u1_abbrev sha1:35b9b25f76
u2_abbrev sha1:de345ab3de
u3_abbrev sha1:9af6654000
u4_abbrev sha1:2901f773f3
u1_abbrev sha256:e3731be242
u2_abbrev sha256:14fadf8cee
u3_abbrev sha256:736c4bcb44
u4_abbrev sha256:673e77d589
# reordered
r1 sha1:aca177a
r2 sha1:14ad629
@ -153,6 +173,18 @@ test_expect_success 'simple A B C (unmodified)' '
test_cmp expect actual
'
test_expect_success 'simple A..B A..C (unmodified) with --abbrev' '
git range-diff --no-color --abbrev=10 main..topic main..unmodified \
>actual &&
cat >expect <<-EOF &&
1: $(test_oid t1_abbrev) = 1: $(test_oid u1_abbrev) s/5/A/
2: $(test_oid t2_abbrev) = 2: $(test_oid u2_abbrev) s/4/A/
3: $(test_oid t3_abbrev) = 3: $(test_oid u3_abbrev) s/11/B/
4: $(test_oid t4_abbrev) = 4: $(test_oid u4_abbrev) s/12/B/
EOF
test_cmp expect actual
'
test_expect_success 'A^! and A^-<n> (unmodified)' '
git range-diff --no-color topic^! unmodified^-1 >actual &&
cat >expect <<-EOF &&