1 #include "cache.h"
2 #include "repository.h"
3 #include "refs.h"
4 #include "remote.h"
5 #include "argv-array.h"
6 #include "ls-refs.h"
7 #include "pkt-line.h"
8 #include "config.h"
9
10 /*
11 * Check if one of the prefixes is a prefix of the ref.
12 * If no prefixes were provided, all refs match.
13 */
ref_match(const struct argv_array * prefixes,const char * refname)14 static int ref_match(const struct argv_array *prefixes, const char *refname)
15 {
16 int i;
17
18 if (!prefixes->argc)
19 return 1; /* no restriction */
20
21 for (i = 0; i < prefixes->argc; i++) {
22 const char *prefix = prefixes->argv[i];
23
24 if (starts_with(refname, prefix))
25 return 1;
26 }
27
28 return 0;
29 }
30
31 struct ls_refs_data {
32 unsigned peel;
33 unsigned symrefs;
34 struct argv_array prefixes;
35 };
36
send_ref(const char * refname,const struct object_id * oid,int flag,void * cb_data)37 static int send_ref(const char *refname, const struct object_id *oid,
38 int flag, void *cb_data)
39 {
40 struct ls_refs_data *data = cb_data;
41 const char *refname_nons = strip_namespace(refname);
42 struct strbuf refline = STRBUF_INIT;
43
44 if (ref_is_hidden(refname_nons, refname))
45 return 0;
46
47 if (!ref_match(&data->prefixes, refname_nons))
48 return 0;
49
50 strbuf_addf(&refline, "%s %s", oid_to_hex(oid), refname_nons);
51 if (data->symrefs && flag & REF_ISSYMREF) {
52 struct object_id unused;
53 const char *symref_target = resolve_ref_unsafe(refname, 0,
54 &unused,
55 &flag);
56
57 if (!symref_target)
58 die("'%s' is a symref but it is not?", refname);
59
60 strbuf_addf(&refline, " symref-target:%s",
61 strip_namespace(symref_target));
62 }
63
64 if (data->peel) {
65 struct object_id peeled;
66 if (!peel_ref(refname, &peeled))
67 strbuf_addf(&refline, " peeled:%s", oid_to_hex(&peeled));
68 }
69
70 strbuf_addch(&refline, '\n');
71 packet_write(1, refline.buf, refline.len);
72
73 strbuf_release(&refline);
74 return 0;
75 }
76
ls_refs_config(const char * var,const char * value,void * data)77 static int ls_refs_config(const char *var, const char *value, void *data)
78 {
79 /*
80 * We only serve fetches over v2 for now, so respect only "uploadpack"
81 * config. This may need to eventually be expanded to "receive", but we
82 * don't yet know how that information will be passed to ls-refs.
83 */
84 return parse_hide_refs_config(var, value, "uploadpack");
85 }
86
ls_refs(struct repository * r,struct argv_array * keys,struct packet_reader * request)87 int ls_refs(struct repository *r, struct argv_array *keys,
88 struct packet_reader *request)
89 {
90 struct ls_refs_data data;
91
92 memset(&data, 0, sizeof(data));
93
94 git_config(ls_refs_config, NULL);
95
96 while (packet_reader_read(request) != PACKET_READ_FLUSH) {
97 const char *arg = request->line;
98 const char *out;
99
100 if (!strcmp("peel", arg))
101 data.peel = 1;
102 else if (!strcmp("symrefs", arg))
103 data.symrefs = 1;
104 else if (skip_prefix(arg, "ref-prefix ", &out))
105 argv_array_push(&data.prefixes, out);
106 }
107
108 head_ref_namespaced(send_ref, &data);
109 for_each_namespaced_ref(send_ref, &data);
110 packet_flush(1);
111 argv_array_clear(&data.prefixes);
112 return 0;
113 }
114