[PATCH v6 10/32] refs: add methods for reflog

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In the file-based backend, the reflog piggybacks on the ref lock.
Since other backends won't have the same sort of ref lock, ref backends
must also handle reflogs.

Signed-off-by: Ronnie Sahlberg <rsahlberg@xxxxxxxxxx>
Signed-off-by: David Turner <dturner@xxxxxxxxxxxxxxxx>
---
 refs.c               | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 refs/files-backend.c | 36 ++++++++++++++++++++++++------------
 refs/refs-internal.h | 27 +++++++++++++++++++++++++++
 3 files changed, 97 insertions(+), 12 deletions(-)

diff --git a/refs.c b/refs.c
index abc5b0d..9f06686 100644
--- a/refs.c
+++ b/refs.c
@@ -1350,3 +1350,49 @@ int resolve_gitlink_ref(const char *path, const char *refname,
 {
 	return the_refs_backend->resolve_gitlink_ref(path, refname, sha1);
 }
+
+int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn,
+				void *cb_data)
+{
+	return the_refs_backend->for_each_reflog_ent_reverse(refname, fn,
+							     cb_data);
+}
+
+int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn,
+			void *cb_data)
+{
+	return the_refs_backend->for_each_reflog_ent(refname, fn, cb_data);
+}
+
+int for_each_reflog(each_ref_fn fn, void *cb_data)
+{
+	return the_refs_backend->for_each_reflog(fn, cb_data);
+}
+
+int reflog_exists(const char *refname)
+{
+	return the_refs_backend->reflog_exists(refname);
+}
+
+int safe_create_reflog(const char *refname, int force_create,
+		       struct strbuf *err)
+{
+	return the_refs_backend->create_reflog(refname, force_create, err);
+}
+
+int delete_reflog(const char *refname)
+{
+	return the_refs_backend->delete_reflog(refname);
+}
+
+int reflog_expire(const char *refname, const unsigned char *sha1,
+		  unsigned int flags,
+		  reflog_expiry_prepare_fn prepare_fn,
+		  reflog_expiry_should_prune_fn should_prune_fn,
+		  reflog_expiry_cleanup_fn cleanup_fn,
+		  void *policy_cb_data)
+{
+	return the_refs_backend->reflog_expire(refname, sha1, flags,
+					       prepare_fn, should_prune_fn,
+					       cleanup_fn, policy_cb_data);
+}
diff --git a/refs/files-backend.c b/refs/files-backend.c
index d315f40..5e44b10 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -2533,7 +2533,8 @@ static int log_ref_setup(const char *refname, struct strbuf *logfile, struct str
 }
 
 
-int safe_create_reflog(const char *refname, int force_create, struct strbuf *err)
+static int files_create_reflog(const char *refname, int force_create,
+			       struct strbuf *err)
 {
 	int ret;
 	struct strbuf sb = STRBUF_INIT;
@@ -2789,7 +2790,7 @@ static int files_create_symref(const char *refname,
 	return ret;
 }
 
-int reflog_exists(const char *refname)
+static int files_reflog_exists(const char *refname)
 {
 	struct stat st;
 
@@ -2797,7 +2798,7 @@ int reflog_exists(const char *refname)
 		S_ISREG(st.st_mode);
 }
 
-int delete_reflog(const char *refname)
+static int files_delete_reflog(const char *refname)
 {
 	return remove_path(git_path("logs/%s", refname));
 }
@@ -2841,7 +2842,9 @@ static char *find_beginning_of_line(char *bob, char *scan)
 	return scan;
 }
 
-int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn, void *cb_data)
+static int files_for_each_reflog_ent_reverse(const char *refname,
+					     each_reflog_ent_fn fn,
+					     void *cb_data)
 {
 	struct strbuf sb = STRBUF_INIT;
 	FILE *logfp;
@@ -2943,7 +2946,8 @@ int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn, void
 	return ret;
 }
 
-int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn, void *cb_data)
+static int files_for_each_reflog_ent(const char *refname,
+				     each_reflog_ent_fn fn, void *cb_data)
 {
 	FILE *logfp;
 	struct strbuf sb = STRBUF_INIT;
@@ -3005,7 +3009,7 @@ static int do_for_each_reflog(struct strbuf *name, each_ref_fn fn, void *cb_data
 	return retval;
 }
 
-int for_each_reflog(each_ref_fn fn, void *cb_data)
+static int files_for_each_reflog(each_ref_fn fn, void *cb_data)
 {
 	int retval;
 	struct strbuf name;
@@ -3315,12 +3319,12 @@ static int expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
 	return 0;
 }
 
-int reflog_expire(const char *refname, const unsigned char *sha1,
-		 unsigned int flags,
-		 reflog_expiry_prepare_fn prepare_fn,
-		 reflog_expiry_should_prune_fn should_prune_fn,
-		 reflog_expiry_cleanup_fn cleanup_fn,
-		 void *policy_cb_data)
+static int files_reflog_expire(const char *refname, const unsigned char *sha1,
+			       unsigned int flags,
+			       reflog_expiry_prepare_fn prepare_fn,
+			       reflog_expiry_should_prune_fn should_prune_fn,
+			       reflog_expiry_cleanup_fn cleanup_fn,
+			       void *policy_cb_data)
 {
 	static struct lock_file reflog_lock;
 	struct expire_reflog_cb cb;
@@ -3425,6 +3429,14 @@ struct ref_storage_be refs_be_files = {
 	"files",
 	files_transaction_commit,
 
+	files_for_each_reflog_ent,
+	files_for_each_reflog_ent_reverse,
+	files_for_each_reflog,
+	files_reflog_exists,
+	files_create_reflog,
+	files_delete_reflog,
+	files_reflog_expire,
+
 	files_pack_refs,
 	files_peel_ref,
 	files_create_symref,
diff --git a/refs/refs-internal.h b/refs/refs-internal.h
index bb0d588..c92e0c3 100644
--- a/refs/refs-internal.h
+++ b/refs/refs-internal.h
@@ -214,6 +214,25 @@ int do_for_each_per_worktree_ref(const char *submodule, const char *base,
 typedef int ref_transaction_commit_fn(struct ref_transaction *transaction,
 				      struct strbuf *err);
 
+/* reflog functions */
+typedef int for_each_reflog_ent_fn(const char *refname,
+				   each_reflog_ent_fn fn,
+				   void *cb_data);
+typedef int for_each_reflog_ent_reverse_fn(const char *refname,
+					   each_reflog_ent_fn fn,
+					   void *cb_data);
+typedef int for_each_reflog_fn(each_ref_fn fn, void *cb_data);
+typedef int reflog_exists_fn(const char *refname);
+typedef int create_reflog_fn(const char *refname, int force_create,
+			     struct strbuf *err);
+typedef int delete_reflog_fn(const char *refname);
+typedef int reflog_expire_fn(const char *refname, const unsigned char *sha1,
+			     unsigned int flags,
+			     reflog_expiry_prepare_fn prepare_fn,
+			     reflog_expiry_should_prune_fn should_prune_fn,
+			     reflog_expiry_cleanup_fn cleanup_fn,
+			     void *policy_cb_data);
+
 /* misc methods */
 typedef int pack_refs_fn(unsigned int flags);
 typedef int peel_ref_fn(const char *refname, unsigned char *sha1);
@@ -237,6 +256,14 @@ struct ref_storage_be {
 	const char *name;
 	ref_transaction_commit_fn *transaction_commit;
 
+	for_each_reflog_ent_fn *for_each_reflog_ent;
+	for_each_reflog_ent_reverse_fn *for_each_reflog_ent_reverse;
+	for_each_reflog_fn *for_each_reflog;
+	reflog_exists_fn *reflog_exists;
+	create_reflog_fn *create_reflog;
+	delete_reflog_fn *delete_reflog;
+	reflog_expire_fn *reflog_expire;
+
 	pack_refs_fn *pack_refs;
 	peel_ref_fn *peel_ref;
 	create_symref_fn *create_symref;
-- 
2.4.2.767.g62658d5-twtrsrc

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