ls-refs: introduce ls-refs server command
[thirdparty/git.git] / ls-refs.c
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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
9/*
10 * Check if one of the prefixes is a prefix of the ref.
11 * If no prefixes were provided, all refs match.
12 */
13static int ref_match(const struct argv_array *prefixes, const char *refname)
14{
15 int i;
16
17 if (!prefixes->argc)
18 return 1; /* no restriction */
19
20 for (i = 0; i < prefixes->argc; i++) {
21 const char *prefix = prefixes->argv[i];
22
23 if (starts_with(refname, prefix))
24 return 1;
25 }
26
27 return 0;
28}
29
30struct ls_refs_data {
31 unsigned peel;
32 unsigned symrefs;
33 struct argv_array prefixes;
34};
35
36static int send_ref(const char *refname, const struct object_id *oid,
37 int flag, void *cb_data)
38{
39 struct ls_refs_data *data = cb_data;
40 const char *refname_nons = strip_namespace(refname);
41 struct strbuf refline = STRBUF_INIT;
42
43 if (!ref_match(&data->prefixes, refname))
44 return 0;
45
46 strbuf_addf(&refline, "%s %s", oid_to_hex(oid), refname_nons);
47 if (data->symrefs && flag & REF_ISSYMREF) {
48 struct object_id unused;
49 const char *symref_target = resolve_ref_unsafe(refname, 0,
50 &unused,
51 &flag);
52
53 if (!symref_target)
54 die("'%s' is a symref but it is not?", refname);
55
56 strbuf_addf(&refline, " symref-target:%s", symref_target);
57 }
58
59 if (data->peel) {
60 struct object_id peeled;
61 if (!peel_ref(refname, &peeled))
62 strbuf_addf(&refline, " peeled:%s", oid_to_hex(&peeled));
63 }
64
65 strbuf_addch(&refline, '\n');
66 packet_write(1, refline.buf, refline.len);
67
68 strbuf_release(&refline);
69 return 0;
70}
71
72int ls_refs(struct repository *r, struct argv_array *keys,
73 struct packet_reader *request)
74{
75 struct ls_refs_data data;
76
77 memset(&data, 0, sizeof(data));
78
79 while (packet_reader_read(request) != PACKET_READ_FLUSH) {
80 const char *arg = request->line;
81 const char *out;
82
83 if (!strcmp("peel", arg))
84 data.peel = 1;
85 else if (!strcmp("symrefs", arg))
86 data.symrefs = 1;
87 else if (skip_prefix(arg, "ref-prefix ", &out))
88 argv_array_push(&data.prefixes, out);
89 }
90
91 head_ref_namespaced(send_ref, &data);
92 for_each_namespaced_ref(send_ref, &data);
93 packet_flush(1);
94 argv_array_clear(&data.prefixes);
95 return 0;
96}