revision: add new parameter to exclude hidden refs

Users can optionally hide refs from remote users in git-upload-pack(1),
git-receive-pack(1) and others via the `transfer.hideRefs`, but there is
not an easy way to obtain the list of all visible or hidden refs right
now. We'll require just that though for a performance improvement in our
connectivity check.

Add a new option `--exclude-hidden=` that excludes any hidden refs from
the next pseudo-ref like `--all` or `--branches`.

Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Taylor Blau <me@ttaylorr.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/revision.h b/revision.h
index 5c8ab16047..adb810c2f8 100644
--- a/revision.h
+++ b/revision.h
@@ -87,6 +87,19 @@ struct ref_exclusions {
 	 * patterns matches, the reference will be excluded.
 	 */
 	struct string_list excluded_refs;
+
+	/*
+	 * Hidden refs is a list of patterns that is to be hidden via
+	 * `ref_is_hidden()`.
+	 */
+	struct string_list hidden_refs;
+
+	/*
+	 * Indicates whether hidden refs have been configured. This is to
+	 * distinguish between no hidden refs existing and hidden refs not
+	 * being parsed.
+	 */
+	char hidden_refs_configured;
 };
 
 /**
@@ -94,6 +107,7 @@ struct ref_exclusions {
  */
 #define REF_EXCLUSIONS_INIT { \
 	.excluded_refs = STRING_LIST_INIT_DUP, \
+	.hidden_refs = STRING_LIST_INIT_DUP, \
 }
 
 struct oidset;
@@ -456,10 +470,12 @@ void show_object_with_name(FILE *, struct object *, const char *);
 /**
  * Helpers to check if a reference should be excluded.
  */
+
 int ref_excluded(const struct ref_exclusions *exclusions, const char *path);
 void init_ref_exclusions(struct ref_exclusions *);
 void clear_ref_exclusions(struct ref_exclusions *);
 void add_ref_exclusion(struct ref_exclusions *, const char *exclude);
+void exclude_hidden_refs(struct ref_exclusions *, const char *section);
 
 /**
  * This function can be used if you want to add commit objects as revision