git/ls-refs.c
Elijah Newren eea0e59ffb treewide: remove unnecessary includes in source files
Each of these were checked with
   gcc -E -I. ${SOURCE_FILE} | grep ${HEADER_FILE}
to ensure that removing the direct inclusion of the header actually
resulted in that header no longer being included at all (i.e. that
no other header pulled it in transitively).

...except for a few cases where we verified that although the header
was brought in transitively, nothing from it was directly used in
that source file.  These cases were:
  * builtin/credential-cache.c
  * builtin/pull.c
  * builtin/send-pack.c

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-12-26 12:04:31 -08:00

212 lines
5.2 KiB
C

#include "git-compat-util.h"
#include "environment.h"
#include "gettext.h"
#include "hash.h"
#include "hex.h"
#include "repository.h"
#include "refs.h"
#include "strvec.h"
#include "ls-refs.h"
#include "pkt-line.h"
#include "config.h"
#include "string-list.h"
static enum {
UNBORN_IGNORE = 0,
UNBORN_ALLOW,
UNBORN_ADVERTISE /* implies ALLOW */
} unborn_config(struct repository *r)
{
const char *str = NULL;
if (repo_config_get_string_tmp(r, "lsrefs.unborn", &str)) {
/*
* If there is no such config, advertise and allow it by
* default.
*/
return UNBORN_ADVERTISE;
} else {
if (!strcmp(str, "advertise")) {
return UNBORN_ADVERTISE;
} else if (!strcmp(str, "allow")) {
return UNBORN_ALLOW;
} else if (!strcmp(str, "ignore")) {
return UNBORN_IGNORE;
} else {
die(_("invalid value for '%s': '%s'"),
"lsrefs.unborn", str);
}
}
}
/*
* If we see this many or more "ref-prefix" lines from the client, we consider
* it "too many" and will avoid using the prefix feature entirely.
*/
#define TOO_MANY_PREFIXES 65536
/*
* Check if one of the prefixes is a prefix of the ref.
* If no prefixes were provided, all refs match.
*/
static int ref_match(const struct strvec *prefixes, const char *refname)
{
int i;
if (!prefixes->nr)
return 1; /* no restriction */
for (i = 0; i < prefixes->nr; i++) {
const char *prefix = prefixes->v[i];
if (starts_with(refname, prefix))
return 1;
}
return 0;
}
struct ls_refs_data {
unsigned peel;
unsigned symrefs;
struct strvec prefixes;
struct strbuf buf;
struct strvec hidden_refs;
unsigned unborn : 1;
};
static int send_ref(const char *refname, const struct object_id *oid,
int flag, void *cb_data)
{
struct ls_refs_data *data = cb_data;
const char *refname_nons = strip_namespace(refname);
strbuf_reset(&data->buf);
if (ref_is_hidden(refname_nons, refname, &data->hidden_refs))
return 0;
if (!ref_match(&data->prefixes, refname_nons))
return 0;
if (oid)
strbuf_addf(&data->buf, "%s %s", oid_to_hex(oid), refname_nons);
else
strbuf_addf(&data->buf, "unborn %s", refname_nons);
if (data->symrefs && flag & REF_ISSYMREF) {
struct object_id unused;
const char *symref_target = resolve_ref_unsafe(refname, 0,
&unused,
&flag);
if (!symref_target)
die("'%s' is a symref but it is not?", refname);
strbuf_addf(&data->buf, " symref-target:%s",
strip_namespace(symref_target));
}
if (data->peel && oid) {
struct object_id peeled;
if (!peel_iterated_oid(oid, &peeled))
strbuf_addf(&data->buf, " peeled:%s", oid_to_hex(&peeled));
}
strbuf_addch(&data->buf, '\n');
packet_fwrite(stdout, data->buf.buf, data->buf.len);
return 0;
}
static void send_possibly_unborn_head(struct ls_refs_data *data)
{
struct strbuf namespaced = STRBUF_INIT;
struct object_id oid;
int flag;
int oid_is_null;
strbuf_addf(&namespaced, "%sHEAD", get_git_namespace());
if (!resolve_ref_unsafe(namespaced.buf, 0, &oid, &flag))
return; /* bad ref */
oid_is_null = is_null_oid(&oid);
if (!oid_is_null ||
(data->unborn && data->symrefs && (flag & REF_ISSYMREF)))
send_ref(namespaced.buf, oid_is_null ? NULL : &oid, flag, data);
strbuf_release(&namespaced);
}
static int ls_refs_config(const char *var, const char *value,
const struct config_context *ctx UNUSED,
void *cb_data)
{
struct ls_refs_data *data = cb_data;
/*
* We only serve fetches over v2 for now, so respect only "uploadpack"
* config. This may need to eventually be expanded to "receive", but we
* don't yet know how that information will be passed to ls-refs.
*/
return parse_hide_refs_config(var, value, "uploadpack", &data->hidden_refs);
}
int ls_refs(struct repository *r, struct packet_reader *request)
{
struct ls_refs_data data;
memset(&data, 0, sizeof(data));
strvec_init(&data.prefixes);
strbuf_init(&data.buf, 0);
strvec_init(&data.hidden_refs);
git_config(ls_refs_config, &data);
while (packet_reader_read(request) == PACKET_READ_NORMAL) {
const char *arg = request->line;
const char *out;
if (!strcmp("peel", arg))
data.peel = 1;
else if (!strcmp("symrefs", arg))
data.symrefs = 1;
else if (skip_prefix(arg, "ref-prefix ", &out)) {
if (data.prefixes.nr < TOO_MANY_PREFIXES)
strvec_push(&data.prefixes, out);
}
else if (!strcmp("unborn", arg))
data.unborn = !!unborn_config(r);
else
die(_("unexpected line: '%s'"), arg);
}
if (request->status != PACKET_READ_FLUSH)
die(_("expected flush after ls-refs arguments"));
/*
* If we saw too many prefixes, we must avoid using them at all; as
* soon as we have any prefix, they are meant to form a comprehensive
* list.
*/
if (data.prefixes.nr >= TOO_MANY_PREFIXES)
strvec_clear(&data.prefixes);
send_possibly_unborn_head(&data);
if (!data.prefixes.nr)
strvec_push(&data.prefixes, "");
refs_for_each_fullref_in_prefixes(get_main_ref_store(r),
get_git_namespace(), data.prefixes.v,
hidden_refs_to_excludes(&data.hidden_refs),
send_ref, &data);
packet_fflush(stdout);
strvec_clear(&data.prefixes);
strbuf_release(&data.buf);
strvec_clear(&data.hidden_refs);
return 0;
}
int ls_refs_advertise(struct repository *r, struct strbuf *value)
{
if (value && unborn_config(r) == UNBORN_ADVERTISE)
strbuf_addstr(value, "unborn");
return 1;
}