refs: add methods for reflog

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@google.com>
Signed-off-by: David Turner <dturner@twopensource.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/refs.c b/refs.c
index 91174e60f7c89037eeb7ba8d71e263e680e5d5fe..47dcf494d41f3218f370a6657efc118ab01781c9 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -1461,3 +1461,66 @@ int verify_refname_available(const char *refname,
 
        return refs->be->verify_refname_available(refs, refname, extra, skip, err);
 }
+
+int for_each_reflog(each_ref_fn fn, void *cb_data)
+{
+       struct ref_store *refs = get_ref_store(NULL);
+       struct ref_iterator *iter;
+
+       iter = refs->be->reflog_iterator_begin(refs);
+
+       return do_for_each_ref_iterator(iter, fn, cb_data);
+}
+
+int for_each_reflog_ent_reverse(const char *refname, each_reflog_ent_fn fn,
+                               void *cb_data)
+{
+       struct ref_store *refs = get_ref_store(NULL);
+
+       return refs->be->for_each_reflog_ent_reverse(refs, refname,
+                                                    fn, cb_data);
+}
+
+int for_each_reflog_ent(const char *refname, each_reflog_ent_fn fn,
+                       void *cb_data)
+{
+       struct ref_store *refs = get_ref_store(NULL);
+
+       return refs->be->for_each_reflog_ent(refs, refname, fn, cb_data);
+}
+
+int reflog_exists(const char *refname)
+{
+       struct ref_store *refs = get_ref_store(NULL);
+
+       return refs->be->reflog_exists(refs, refname);
+}
+
+int safe_create_reflog(const char *refname, int force_create,
+                      struct strbuf *err)
+{
+       struct ref_store *refs = get_ref_store(NULL);
+
+       return refs->be->create_reflog(refs, refname, force_create, err);
+}
+
+int delete_reflog(const char *refname)
+{
+       struct ref_store *refs = get_ref_store(NULL);
+
+       return refs->be->delete_reflog(refs, 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)
+{
+       struct ref_store *refs = get_ref_store(NULL);
+
+       return refs->be->reflog_expire(refs, 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 2cda511352f8b68658a29f3e48aad8fd4077975c..336d432572e410a05cd3468ce7912bd4fce764d3 100644 (file)
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -2777,11 +2777,16 @@ 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(struct ref_store *ref_store,
+                              const char *refname, int force_create,
+                              struct strbuf *err)
 {
        int ret;
        struct strbuf sb = STRBUF_INIT;
 
+       /* Check validity (but we don't need the result): */
+       files_downcast(ref_store, 0, "create_reflog");
+
        ret = log_ref_setup(refname, &sb, err, force_create);
        strbuf_release(&sb);
        return ret;
@@ -3075,16 +3080,24 @@ int set_worktree_head_symref(const char *gitdir, const char *target)
        return ret;
 }
 
-int reflog_exists(const char *refname)
+static int files_reflog_exists(struct ref_store *ref_store,
+                              const char *refname)
 {
        struct stat st;
 
+       /* Check validity (but we don't need the result): */
+       files_downcast(ref_store, 0, "reflog_exists");
+
        return !lstat(git_path("logs/%s", refname), &st) &&
                S_ISREG(st.st_mode);
 }
 
-int delete_reflog(const char *refname)
+static int files_delete_reflog(struct ref_store *ref_store,
+                              const char *refname)
 {
+       /* Check validity (but we don't need the result): */
+       files_downcast(ref_store, 0, "delete_reflog");
+
        return remove_path(git_path("logs/%s", refname));
 }
 
@@ -3127,13 +3140,19 @@ 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(struct ref_store *ref_store,
+                                            const char *refname,
+                                            each_reflog_ent_fn fn,
+                                            void *cb_data)
 {
        struct strbuf sb = STRBUF_INIT;
        FILE *logfp;
        long pos;
        int ret = 0, at_tail = 1;
 
+       /* Check validity (but we don't need the result): */
+       files_downcast(ref_store, 0, "for_each_reflog_ent_reverse");
+
        logfp = fopen(git_path("logs/%s", refname), "r");
        if (!logfp)
                return -1;
@@ -3229,12 +3248,17 @@ 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(struct ref_store *ref_store,
+                                    const char *refname,
+                                    each_reflog_ent_fn fn, void *cb_data)
 {
        FILE *logfp;
        struct strbuf sb = STRBUF_INIT;
        int ret = 0;
 
+       /* Check validity (but we don't need the result): */
+       files_downcast(ref_store, 0, "for_each_reflog_ent");
+
        logfp = fopen(git_path("logs/%s", refname), "r");
        if (!logfp)
                return -1;
@@ -3313,22 +3337,19 @@ static struct ref_iterator_vtable files_reflog_iterator_vtable = {
        files_reflog_iterator_abort
 };
 
-struct ref_iterator *files_reflog_iterator_begin(void)
+static struct ref_iterator *files_reflog_iterator_begin(struct ref_store *ref_store)
 {
        struct files_reflog_iterator *iter = xcalloc(1, sizeof(*iter));
        struct ref_iterator *ref_iterator = &iter->base;
 
+       /* Check validity (but we don't need the result): */
+       files_downcast(ref_store, 0, "reflog_iterator_begin");
+
        base_ref_iterator_init(ref_iterator, &files_reflog_iterator_vtable);
        iter->dir_iterator = dir_iterator_begin(git_path("logs"));
        return ref_iterator;
 }
 
-int for_each_reflog(each_ref_fn fn, void *cb_data)
-{
-       return do_for_each_ref_iterator(files_reflog_iterator_begin(),
-                                       fn, cb_data);
-}
-
 static int ref_update_reject_duplicates(struct string_list *refnames,
                                        struct strbuf *err)
 {
@@ -3925,15 +3946,16 @@ 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(struct ref_store *ref_store,
+                              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)
 {
        struct files_ref_store *refs =
-               get_files_ref_store(NULL, "reflog_expire");
+               files_downcast(ref_store, 0, "reflog_expire");
        static struct lock_file reflog_lock;
        struct expire_reflog_cb cb;
        struct ref_lock *lock;
@@ -4046,5 +4068,13 @@ struct ref_storage_be refs_be_files = {
 
        files_ref_iterator_begin,
        files_read_raw_ref,
-       files_verify_refname_available
+       files_verify_refname_available,
+
+       files_reflog_iterator_begin,
+       files_for_each_reflog_ent,
+       files_for_each_reflog_ent_reverse,
+       files_reflog_exists,
+       files_create_reflog,
+       files_delete_reflog,
+       files_reflog_expire
 };

diff --git a/refs/refs-internal.h b/refs/refs-internal.h
index 5be62a296ab658cf938f07759b2be7605ebe01d0..a20b62261fca44676b76af0cbb0ce5604af15cb8 100644 (file)
--- a/refs/refs-internal.h
+++ b/refs/refs-internal.h
@@ -404,13 +404,6 @@ struct ref_iterator *prefix_ref_iterator_begin(struct ref_iterator *iter0,
                                               const char *prefix,
                                               int trim);
 
-/*
- * Iterate over the references in the main ref_store that have a
- * reflog. The paths within a directory are iterated over in arbitrary
- * order.
- */
-struct ref_iterator *files_reflog_iterator_begin(void);
-
 /* Internal implementation of reference iteration: */
 
 /*
@@ -507,6 +500,35 @@ typedef struct ref_iterator *ref_iterator_begin_fn(
                struct ref_store *ref_store,
                const char *prefix, unsigned int flags);
 
+/* reflog functions */
+
+/*
+ * Iterate over the references in the specified ref_store that have a
+ * reflog. The refs are iterated over in arbitrary order.
+ */
+typedef struct ref_iterator *reflog_iterator_begin_fn(
+               struct ref_store *ref_store);
+
+typedef int for_each_reflog_ent_fn(struct ref_store *ref_store,
+                                  const char *refname,
+                                  each_reflog_ent_fn fn,
+                                  void *cb_data);
+typedef int for_each_reflog_ent_reverse_fn(struct ref_store *ref_store,
+                                          const char *refname,
+                                          each_reflog_ent_fn fn,
+                                          void *cb_data);
+typedef int reflog_exists_fn(struct ref_store *ref_store, const char *refname);
+typedef int create_reflog_fn(struct ref_store *ref_store, const char *refname,
+                            int force_create, struct strbuf *err);
+typedef int delete_reflog_fn(struct ref_store *ref_store, const char *refname);
+typedef int reflog_expire_fn(struct ref_store *ref_store,
+                            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);
+
 /*
  * Read a reference from the specified reference store, non-recursively.
  * Set type to describe the reference, and:
@@ -568,6 +590,14 @@ struct ref_storage_be {
        ref_iterator_begin_fn *iterator_begin;
        read_raw_ref_fn *read_raw_ref;
        verify_refname_available_fn *verify_refname_available;
+
+       reflog_iterator_begin_fn *reflog_iterator_begin;
+       for_each_reflog_ent_fn *for_each_reflog_ent;
+       for_each_reflog_ent_reverse_fn *for_each_reflog_ent_reverse;
+       reflog_exists_fn *reflog_exists;
+       create_reflog_fn *create_reflog;
+       delete_reflog_fn *delete_reflog;
+       reflog_expire_fn *reflog_expire;
 };
 
 extern struct ref_storage_be refs_be_files;