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refs: remove create_symref and associated dead code
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In the previous commits, we converted `refs_create_symref()` to utilize
transactions to perform symref updates. Earlier `refs_create_symref()`
used `create_symref()` to do the same.

We can now remove `create_symref()` and any code associated with it
which is no longer used. We remove `create_symref()` code from all the
reference backends and also remove it entirely from the `ref_storage_be`
struct.

Signed-off-by: Karthik Nayak <karthik.188@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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@KarthikNayak @gitster
KarthikNayak authored and gitster committed May 3, 2024
1 parent 8fa5e33 commit b8fbb3c
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Showing 5 changed files with 0 additions and 172 deletions.
13 changes: 0 additions & 13 deletions refs/debug.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -131,18 +131,6 @@ static int debug_pack_refs(struct ref_store *ref_store, struct pack_refs_opts *o
return res;
}

static int debug_create_symref(struct ref_store *ref_store,
const char *ref_name, const char *target,
const char *logmsg)
{
struct debug_ref_store *drefs = (struct debug_ref_store *)ref_store;
int res = drefs->refs->be->create_symref(drefs->refs, ref_name, target,
logmsg);
trace_printf_key(&trace_refs, "create_symref: %s -> %s \"%s\": %d\n", ref_name,
target, logmsg, res);
return res;
}

static int debug_rename_ref(struct ref_store *ref_store, const char *oldref,
const char *newref, const char *logmsg)
{
Expand Down Expand Up @@ -441,7 +429,6 @@ struct ref_storage_be refs_be_debug = {
.initial_transaction_commit = debug_initial_transaction_commit,

.pack_refs = debug_pack_refs,
.create_symref = debug_create_symref,
.rename_ref = debug_rename_ref,
.copy_ref = debug_copy_ref,

Expand Down
67 changes: 0 additions & 67 deletions refs/files-backend.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1903,23 +1903,6 @@ static int create_ref_symlink(struct ref_lock *lock, const char *target)
return ret;
}

static void update_symref_reflog(struct files_ref_store *refs,
struct ref_lock *lock, const char *refname,
const char *target, const char *logmsg)
{
struct strbuf err = STRBUF_INIT;
struct object_id new_oid;

if (logmsg &&
refs_resolve_ref_unsafe(&refs->base, target,
RESOLVE_REF_READING, &new_oid, NULL) &&
files_log_ref_write(refs, refname, &lock->old_oid,
&new_oid, logmsg, 0, &err)) {
error("%s", err.buf);
strbuf_release(&err);
}
}

static int create_symref_lock(struct files_ref_store *refs,
struct ref_lock *lock, const char *refname,
const char *target, struct strbuf *err)
Expand All @@ -1939,55 +1922,6 @@ static int create_symref_lock(struct files_ref_store *refs,
return 0;
}

static int create_and_commit_symref(struct files_ref_store *refs,
struct ref_lock *lock, const char *refname,
const char *target, const char *logmsg)
{
struct strbuf err = STRBUF_INIT;
int ret;

if (prefer_symlink_refs && !create_ref_symlink(lock, target)) {
update_symref_reflog(refs, lock, refname, target, logmsg);
return 0;
}

ret = create_symref_lock(refs, lock, refname, target, &err);
if (!ret) {
update_symref_reflog(refs, lock, refname, target, logmsg);

if (commit_ref(lock) < 0)
return error("unable to write symref for %s: %s", refname,
strerror(errno));
} else {
return error("%s", err.buf);
}

return ret;
}

static int files_create_symref(struct ref_store *ref_store,
const char *refname, const char *target,
const char *logmsg)
{
struct files_ref_store *refs =
files_downcast(ref_store, REF_STORE_WRITE, "create_symref");
struct strbuf err = STRBUF_INIT;
struct ref_lock *lock;
int ret;

lock = lock_ref_oid_basic(refs, refname, &err);
if (!lock) {
error("%s", err.buf);
strbuf_release(&err);
return -1;
}

ret = create_and_commit_symref(refs, lock, refname, target, logmsg);

unlock_ref(lock);
return ret;
}

static int files_reflog_exists(struct ref_store *ref_store,
const char *refname)
{
Expand Down Expand Up @@ -3413,7 +3347,6 @@ struct ref_storage_be refs_be_files = {
.initial_transaction_commit = files_initial_transaction_commit,

.pack_refs = files_pack_refs,
.create_symref = files_create_symref,
.rename_ref = files_rename_ref,
.copy_ref = files_copy_ref,

Expand Down
1 change: 0 additions & 1 deletion refs/packed-backend.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1714,7 +1714,6 @@ struct ref_storage_be refs_be_packed = {
.initial_transaction_commit = packed_initial_transaction_commit,

.pack_refs = packed_pack_refs,
.create_symref = NULL,
.rename_ref = NULL,
.copy_ref = NULL,

Expand Down
5 changes: 0 additions & 5 deletions refs/refs-internal.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -566,10 +566,6 @@ typedef int ref_transaction_commit_fn(struct ref_store *refs,

typedef int pack_refs_fn(struct ref_store *ref_store,
struct pack_refs_opts *opts);
typedef int create_symref_fn(struct ref_store *ref_store,
const char *ref_target,
const char *refs_heads_master,
const char *logmsg);
typedef int rename_ref_fn(struct ref_store *ref_store,
const char *oldref, const char *newref,
const char *logmsg);
Expand Down Expand Up @@ -690,7 +686,6 @@ struct ref_storage_be {
ref_transaction_commit_fn *initial_transaction_commit;

pack_refs_fn *pack_refs;
create_symref_fn *create_symref;
rename_ref_fn *rename_ref;
copy_ref_fn *copy_ref;

Expand Down
86 changes: 0 additions & 86 deletions refs/reftable-backend.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1272,91 +1272,6 @@ struct write_create_symref_arg {
const char *logmsg;
};

static int write_create_symref_table(struct reftable_writer *writer, void *cb_data)
{
struct write_create_symref_arg *create = cb_data;
uint64_t ts = reftable_stack_next_update_index(create->stack);
struct reftable_ref_record ref = {
.refname = (char *)create->refname,
.value_type = REFTABLE_REF_SYMREF,
.value.symref = (char *)create->target,
.update_index = ts,
};
struct reftable_log_record log = {0};
struct object_id new_oid;
struct object_id old_oid;
int ret;

reftable_writer_set_limits(writer, ts, ts);

ret = reftable_writer_add_ref(writer, &ref);
if (ret)
return ret;

/*
* Note that it is important to try and resolve the reference before we
* write the log entry. This is because `should_write_log()` will munge
* `core.logAllRefUpdates`, which is undesirable when we create a new
* repository because it would be written into the config. As HEAD will
* not resolve for new repositories this ordering will ensure that this
* never happens.
*/
if (!create->logmsg ||
!refs_resolve_ref_unsafe(&create->refs->base, create->target,
RESOLVE_REF_READING, &new_oid, NULL) ||
!should_write_log(&create->refs->base, create->refname))
return 0;

fill_reftable_log_record(&log);
log.refname = xstrdup(create->refname);
log.update_index = ts;
log.value.update.message = xstrndup(create->logmsg,
create->refs->write_options.block_size / 2);
memcpy(log.value.update.new_hash, new_oid.hash, GIT_MAX_RAWSZ);
if (refs_resolve_ref_unsafe(&create->refs->base, create->refname,
RESOLVE_REF_READING, &old_oid, NULL))
memcpy(log.value.update.old_hash, old_oid.hash, GIT_MAX_RAWSZ);

ret = reftable_writer_add_log(writer, &log);
reftable_log_record_release(&log);
return ret;
}

static int reftable_be_create_symref(struct ref_store *ref_store,
const char *refname,
const char *target,
const char *logmsg)
{
struct reftable_ref_store *refs =
reftable_be_downcast(ref_store, REF_STORE_WRITE, "create_symref");
struct reftable_stack *stack = stack_for(refs, refname, &refname);
struct write_create_symref_arg arg = {
.refs = refs,
.stack = stack,
.refname = refname,
.target = target,
.logmsg = logmsg,
};
int ret;

ret = refs->err;
if (ret < 0)
goto done;

ret = reftable_stack_reload(stack);
if (ret)
goto done;

ret = reftable_stack_add(stack, &write_create_symref_table, &arg);

done:
assert(ret != REFTABLE_API_ERROR);
if (ret)
error("unable to write symref for %s: %s", refname,
reftable_error_str(ret));
return ret;
}

struct write_copy_arg {
struct reftable_ref_store *refs;
struct reftable_stack *stack;
Expand Down Expand Up @@ -2264,7 +2179,6 @@ struct ref_storage_be refs_be_reftable = {
.initial_transaction_commit = reftable_be_initial_transaction_commit,

.pack_refs = reftable_be_pack_refs,
.create_symref = reftable_be_create_symref,
.rename_ref = reftable_be_rename_ref,
.copy_ref = reftable_be_copy_ref,

Expand Down

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