diff mbox series

[5/5] branch: show "HEAD detached" first under reverse sort

Message ID 20210106100139.14651-6-avarab@gmail.com (mailing list archive)
State New, archived
Headers show
Series branch: --sort improvements | expand

Commit Message

Ævar Arnfjörð Bjarmason Jan. 6, 2021, 10:01 a.m. UTC
Change the output of the likes of "git branch -l --sort=-objectsize"
to show the "(HEAD detached at <hash>)" message at the start of the
output. Before the compare_detached_head() function added in a
preceding commit we'd emit this output as an emergent effect.

It doesn't make any sense to consider the objectsize, type or other
non-attribute of the "(HEAD detached at <hash>)" message for the
purposes of sorting. Let's always emit it at the top instead. The only
reason it was sorted in the first place is because we're injecting it
into the ref-filter machinery so builtin/branch.c doesn't need to do
its own "am I detached?" detection.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 ref-filter.c             | 4 +++-
 t/t3203-branch-output.sh | 6 +++---
 2 files changed, 6 insertions(+), 4 deletions(-)

Comments

Junio C Hamano Jan. 6, 2021, 11:49 p.m. UTC | #1
Ævar Arnfjörð Bjarmason  <avarab@gmail.com> writes:

>  	struct atom_value *va, *vb;
>  	int cmp;
> +	int cmp_detached_head = 0;
>  	cmp_type cmp_type = used_atom[s->atom].type;
>  	int (*cmp_fn)(const char *, const char *);
>  	struct strbuf err = STRBUF_INIT;
> @@ -2370,6 +2371,7 @@ static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, stru
>  	     ^
>  	     (b->kind & FILTER_REFS_DETACHED_HEAD))) {
>  		cmp = compare_detached_head(a, b);
> +		cmp_detached_head = 1;
>  	} else if (s->version)
>  		cmp = versioncmp(va->s, vb->s);
>  	else if (cmp_type == FIELD_STR)
> @@ -2383,7 +2385,7 @@ static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, stru
>  			cmp = 1;
>  	}
>  
> -	return (s->reverse) ? -cmp : cmp;
> +	return (s->reverse && !cmp_detached_head) ? -cmp : cmp;
>  }

OK.  Other criteria would honor the "reverse" bit, but when we work
on the set that includes "HEAD" ref (which only happens when "branch -l"
deals with a detached head), it always tries to sort it before all other
refs, regardless of the reverse bit.  Makes sense.

>  static int compare_refs(const void *a_, const void *b_, void *ref_sorting)
> diff --git a/t/t3203-branch-output.sh b/t/t3203-branch-output.sh
> index 8f53b081365..5e0577d5c7f 100755
> --- a/t/t3203-branch-output.sh
> +++ b/t/t3203-branch-output.sh
> @@ -221,10 +221,10 @@ test_expect_success 'git branch `--sort=[-]objectsize` option' '
>  	test_i18ncmp expect actual &&
>  
>  	cat >expect <<-\EOF &&
> +	* (HEAD detached from fromtag)
>  	  branch-one
>  	  main
>  	  branch-two
> -	* (HEAD detached from fromtag)
>  	EOF
>  	git branch --sort=-objectsize >actual &&
>  	test_i18ncmp expect actual
> @@ -241,10 +241,10 @@ test_expect_success 'git branch `--sort=[-]type` option' '
>  	test_i18ncmp expect actual &&
>  
>  	cat >expect <<-\EOF &&
> +	* (HEAD detached from fromtag)
>  	  branch-one
>  	  branch-two
>  	  main
> -	* (HEAD detached from fromtag)
>  	EOF
>  	git branch --sort=-type >actual &&
>  	test_i18ncmp expect actual
> @@ -261,10 +261,10 @@ test_expect_success 'git branch `--sort=[-]version:refname` option' '
>  	test_i18ncmp expect actual &&
>  
>  	cat >expect <<-\EOF &&
> +	* (HEAD detached from fromtag)
>  	  main
>  	  branch-two
>  	  branch-one
> -	* (HEAD detached from fromtag)
>  	EOF
>  	git branch --sort=-version:refname >actual &&
>  	test_i18ncmp expect actual
diff mbox series

Patch

diff --git a/ref-filter.c b/ref-filter.c
index 7e0289cb659..5bbdc46c1f9 100644
--- a/ref-filter.c
+++ b/ref-filter.c
@@ -2355,6 +2355,7 @@  static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, stru
 {
 	struct atom_value *va, *vb;
 	int cmp;
+	int cmp_detached_head = 0;
 	cmp_type cmp_type = used_atom[s->atom].type;
 	int (*cmp_fn)(const char *, const char *);
 	struct strbuf err = STRBUF_INIT;
@@ -2370,6 +2371,7 @@  static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, stru
 	     ^
 	     (b->kind & FILTER_REFS_DETACHED_HEAD))) {
 		cmp = compare_detached_head(a, b);
+		cmp_detached_head = 1;
 	} else if (s->version)
 		cmp = versioncmp(va->s, vb->s);
 	else if (cmp_type == FIELD_STR)
@@ -2383,7 +2385,7 @@  static int cmp_ref_sorting(struct ref_sorting *s, struct ref_array_item *a, stru
 			cmp = 1;
 	}
 
-	return (s->reverse) ? -cmp : cmp;
+	return (s->reverse && !cmp_detached_head) ? -cmp : cmp;
 }
 
 static int compare_refs(const void *a_, const void *b_, void *ref_sorting)
diff --git a/t/t3203-branch-output.sh b/t/t3203-branch-output.sh
index 8f53b081365..5e0577d5c7f 100755
--- a/t/t3203-branch-output.sh
+++ b/t/t3203-branch-output.sh
@@ -221,10 +221,10 @@  test_expect_success 'git branch `--sort=[-]objectsize` option' '
 	test_i18ncmp expect actual &&
 
 	cat >expect <<-\EOF &&
+	* (HEAD detached from fromtag)
 	  branch-one
 	  main
 	  branch-two
-	* (HEAD detached from fromtag)
 	EOF
 	git branch --sort=-objectsize >actual &&
 	test_i18ncmp expect actual
@@ -241,10 +241,10 @@  test_expect_success 'git branch `--sort=[-]type` option' '
 	test_i18ncmp expect actual &&
 
 	cat >expect <<-\EOF &&
+	* (HEAD detached from fromtag)
 	  branch-one
 	  branch-two
 	  main
-	* (HEAD detached from fromtag)
 	EOF
 	git branch --sort=-type >actual &&
 	test_i18ncmp expect actual
@@ -261,10 +261,10 @@  test_expect_success 'git branch `--sort=[-]version:refname` option' '
 	test_i18ncmp expect actual &&
 
 	cat >expect <<-\EOF &&
+	* (HEAD detached from fromtag)
 	  main
 	  branch-two
 	  branch-one
-	* (HEAD detached from fromtag)
 	EOF
 	git branch --sort=-version:refname >actual &&
 	test_i18ncmp expect actual