mingw: allow building with an MSYS2 runtime v3.x
[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"
e20b4192 8#include "config.h"
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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 */
14static 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
31struct ls_refs_data {
32 unsigned peel;
33 unsigned symrefs;
34 struct argv_array prefixes;
35};
36
37static 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
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44 if (ref_is_hidden(refname_nons, refname))
45 return 0;
46
e2f41a0a 47 if (!ref_match(&data->prefixes, refname_nons))
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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", symref_target);
61 }
62
63 if (data->peel) {
64 struct object_id peeled;
65 if (!peel_ref(refname, &peeled))
66 strbuf_addf(&refline, " peeled:%s", oid_to_hex(&peeled));
67 }
68
69 strbuf_addch(&refline, '\n');
70 packet_write(1, refline.buf, refline.len);
71
72 strbuf_release(&refline);
73 return 0;
74}
75
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76static int ls_refs_config(const char *var, const char *value, void *data)
77{
78 /*
79 * We only serve fetches over v2 for now, so respect only "uploadpack"
80 * config. This may need to eventually be expanded to "receive", but we
81 * don't yet know how that information will be passed to ls-refs.
82 */
83 return parse_hide_refs_config(var, value, "uploadpack");
84}
85
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86int ls_refs(struct repository *r, struct argv_array *keys,
87 struct packet_reader *request)
88{
89 struct ls_refs_data data;
90
91 memset(&data, 0, sizeof(data));
92
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93 git_config(ls_refs_config, NULL);
94
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95 while (packet_reader_read(request) != PACKET_READ_FLUSH) {
96 const char *arg = request->line;
97 const char *out;
98
99 if (!strcmp("peel", arg))
100 data.peel = 1;
101 else if (!strcmp("symrefs", arg))
102 data.symrefs = 1;
103 else if (skip_prefix(arg, "ref-prefix ", &out))
104 argv_array_push(&data.prefixes, out);
105 }
106
107 head_ref_namespaced(send_ref, &data);
108 for_each_namespaced_ref(send_ref, &data);
109 packet_flush(1);
110 argv_array_clear(&data.prefixes);
111 return 0;
112}