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refs: allow "HEAD" as decoration filter

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The normalize_glob_ref() method was introduced in 65516f586b693 (log:
add option to choose which refs to decorate, 2017-11-21) to help with
decoration filters such as --decorate-refs=<filter> and
--decorate-refs-exclude=<filter>. The method has not been used anywhere
else.

At the moment, it is impossible to specify HEAD as a decoration filter
since normalize_glob_ref() prepends "refs/" to the filter if it isn't
already there.

Allow adding HEAD as a decoration filter by allowing the exact string
"HEAD" to not be prepended with "refs/". Add a test in t4202-log.sh that
would previously fail since the HEAD decoration would exist in the
output.

It is sufficient to only cover "HEAD" here and not include other special
refs like REBASE_HEAD. This is because HEAD is the only ref outside of
refs/* that is added to the list of decorations. However, we may want to
special-case these other refs in normalize_glob_ref() in the future.
Leave a NEEDSWORK comment for now.

Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Derrick Stolee 2022-08-05 17:58:33 +00:00 committed by Junio C Hamano
parent bbea4dcf42
commit b877e617e6
2 changed files with 14 additions and 3 deletions
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11
refs.c
View File

@ -455,11 +455,16 @@ void normalize_glob_ref(struct string_list_item *item, const char *prefix,
if (*pattern == '/')
BUG("pattern must not start with '/'");
if (prefix) {
if (prefix)
strbuf_addstr(&normalized_pattern, prefix);
}
else if (!starts_with(pattern, "refs/"))
else if (!starts_with(pattern, "refs/") &&
strcmp(pattern, "HEAD"))
strbuf_addstr(&normalized_pattern, "refs/");
/*
* NEEDSWORK: Special case other symrefs such as REBASE_HEAD,
* MERGE_HEAD, etc.
*/
strbuf_addstr(&normalized_pattern, pattern);
strbuf_strip_suffix(&normalized_pattern, "/");

6
t/t4202-log.sh
View File

@ -1025,6 +1025,12 @@ test_expect_success 'decorate-refs and simplify-by-decoration without output' '
test_cmp expect actual
'
test_expect_success 'decorate-refs-exclude HEAD' '
git log --decorate=full --oneline \
--decorate-refs-exclude="HEAD" >actual &&
! grep HEAD actual
'
test_expect_success 'log.decorate config parsing' '
git log --oneline --decorate=full >expect.full &&
git log --oneline --decorate=short >expect.short &&