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Commit | Line | Data |
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72d0ea00 BW |
1 | #include "cache.h" |
2 | #include "repository.h" | |
3 | #include "refs.h" | |
4 | #include "remote.h" | |
dbbcd44f | 5 | #include "strvec.h" |
72d0ea00 BW |
6 | #include "ls-refs.h" |
7 | #include "pkt-line.h" | |
e20b4192 | 8 | #include "config.h" |
72d0ea00 | 9 | |
59e1205d JT |
10 | static int config_read; |
11 | static int advertise_unborn; | |
12 | static int allow_unborn; | |
13 | ||
14 | static void ensure_config_read(void) | |
15 | { | |
16 | const char *str = NULL; | |
17 | ||
18 | if (config_read) | |
19 | return; | |
20 | ||
21 | if (repo_config_get_string_tmp(the_repository, "lsrefs.unborn", &str)) { | |
22 | /* | |
23 | * If there is no such config, advertise and allow it by | |
24 | * default. | |
25 | */ | |
26 | advertise_unborn = 1; | |
27 | allow_unborn = 1; | |
28 | } else { | |
29 | if (!strcmp(str, "advertise")) { | |
30 | advertise_unborn = 1; | |
31 | allow_unborn = 1; | |
32 | } else if (!strcmp(str, "allow")) { | |
33 | allow_unborn = 1; | |
34 | } else if (!strcmp(str, "ignore")) { | |
35 | /* do nothing */ | |
36 | } else { | |
37 | die(_("invalid value '%s' for lsrefs.unborn"), str); | |
38 | } | |
39 | } | |
40 | config_read = 1; | |
41 | } | |
42 | ||
72d0ea00 BW |
43 | /* |
44 | * Check if one of the prefixes is a prefix of the ref. | |
45 | * If no prefixes were provided, all refs match. | |
46 | */ | |
ef8d7ac4 | 47 | static int ref_match(const struct strvec *prefixes, const char *refname) |
72d0ea00 BW |
48 | { |
49 | int i; | |
50 | ||
d70a9eb6 | 51 | if (!prefixes->nr) |
72d0ea00 BW |
52 | return 1; /* no restriction */ |
53 | ||
d70a9eb6 JK |
54 | for (i = 0; i < prefixes->nr; i++) { |
55 | const char *prefix = prefixes->v[i]; | |
72d0ea00 BW |
56 | |
57 | if (starts_with(refname, prefix)) | |
58 | return 1; | |
59 | } | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
64 | struct ls_refs_data { | |
65 | unsigned peel; | |
66 | unsigned symrefs; | |
ef8d7ac4 | 67 | struct strvec prefixes; |
59e1205d | 68 | unsigned unborn : 1; |
72d0ea00 BW |
69 | }; |
70 | ||
71 | static int send_ref(const char *refname, const struct object_id *oid, | |
72 | int flag, void *cb_data) | |
73 | { | |
74 | struct ls_refs_data *data = cb_data; | |
75 | const char *refname_nons = strip_namespace(refname); | |
76 | struct strbuf refline = STRBUF_INIT; | |
77 | ||
e20b4192 JK |
78 | if (ref_is_hidden(refname_nons, refname)) |
79 | return 0; | |
80 | ||
e2f41a0a | 81 | if (!ref_match(&data->prefixes, refname_nons)) |
72d0ea00 BW |
82 | return 0; |
83 | ||
59e1205d JT |
84 | if (oid) |
85 | strbuf_addf(&refline, "%s %s", oid_to_hex(oid), refname_nons); | |
86 | else | |
87 | strbuf_addf(&refline, "unborn %s", refname_nons); | |
72d0ea00 BW |
88 | if (data->symrefs && flag & REF_ISSYMREF) { |
89 | struct object_id unused; | |
90 | const char *symref_target = resolve_ref_unsafe(refname, 0, | |
91 | &unused, | |
92 | &flag); | |
93 | ||
94 | if (!symref_target) | |
95 | die("'%s' is a symref but it is not?", refname); | |
96 | ||
533e0882 JK |
97 | strbuf_addf(&refline, " symref-target:%s", |
98 | strip_namespace(symref_target)); | |
72d0ea00 BW |
99 | } |
100 | ||
59e1205d | 101 | if (data->peel && oid) { |
72d0ea00 | 102 | struct object_id peeled; |
36a31792 | 103 | if (!peel_iterated_oid(oid, &peeled)) |
72d0ea00 BW |
104 | strbuf_addf(&refline, " peeled:%s", oid_to_hex(&peeled)); |
105 | } | |
106 | ||
107 | strbuf_addch(&refline, '\n'); | |
108 | packet_write(1, refline.buf, refline.len); | |
109 | ||
110 | strbuf_release(&refline); | |
111 | return 0; | |
112 | } | |
113 | ||
59e1205d JT |
114 | static void send_possibly_unborn_head(struct ls_refs_data *data) |
115 | { | |
116 | struct strbuf namespaced = STRBUF_INIT; | |
117 | struct object_id oid; | |
118 | int flag; | |
119 | int oid_is_null; | |
120 | ||
121 | strbuf_addf(&namespaced, "%sHEAD", get_git_namespace()); | |
122 | if (!resolve_ref_unsafe(namespaced.buf, 0, &oid, &flag)) | |
123 | return; /* bad ref */ | |
124 | oid_is_null = is_null_oid(&oid); | |
125 | if (!oid_is_null || | |
126 | (data->unborn && data->symrefs && (flag & REF_ISSYMREF))) | |
127 | send_ref(namespaced.buf, oid_is_null ? NULL : &oid, flag, data); | |
128 | strbuf_release(&namespaced); | |
129 | } | |
130 | ||
e20b4192 JK |
131 | static int ls_refs_config(const char *var, const char *value, void *data) |
132 | { | |
133 | /* | |
134 | * We only serve fetches over v2 for now, so respect only "uploadpack" | |
135 | * config. This may need to eventually be expanded to "receive", but we | |
136 | * don't yet know how that information will be passed to ls-refs. | |
137 | */ | |
138 | return parse_hide_refs_config(var, value, "uploadpack"); | |
139 | } | |
140 | ||
ef8d7ac4 | 141 | int ls_refs(struct repository *r, struct strvec *keys, |
72d0ea00 BW |
142 | struct packet_reader *request) |
143 | { | |
144 | struct ls_refs_data data; | |
145 | ||
146 | memset(&data, 0, sizeof(data)); | |
83befd37 | 147 | strvec_init(&data.prefixes); |
72d0ea00 | 148 | |
59e1205d | 149 | ensure_config_read(); |
e20b4192 JK |
150 | git_config(ls_refs_config, NULL); |
151 | ||
4845b772 | 152 | while (packet_reader_read(request) == PACKET_READ_NORMAL) { |
72d0ea00 BW |
153 | const char *arg = request->line; |
154 | const char *out; | |
155 | ||
156 | if (!strcmp("peel", arg)) | |
157 | data.peel = 1; | |
158 | else if (!strcmp("symrefs", arg)) | |
159 | data.symrefs = 1; | |
160 | else if (skip_prefix(arg, "ref-prefix ", &out)) | |
ef8d7ac4 | 161 | strvec_push(&data.prefixes, out); |
59e1205d JT |
162 | else if (!strcmp("unborn", arg)) |
163 | data.unborn = allow_unborn; | |
72d0ea00 BW |
164 | } |
165 | ||
4845b772 JK |
166 | if (request->status != PACKET_READ_FLUSH) |
167 | die(_("expected flush after ls-refs arguments")); | |
168 | ||
59e1205d | 169 | send_possibly_unborn_head(&data); |
b3970c70 TB |
170 | if (!data.prefixes.nr) |
171 | strvec_push(&data.prefixes, ""); | |
172 | for_each_fullref_in_prefixes(get_git_namespace(), data.prefixes.v, | |
173 | send_ref, &data, 0); | |
72d0ea00 | 174 | packet_flush(1); |
ef8d7ac4 | 175 | strvec_clear(&data.prefixes); |
72d0ea00 BW |
176 | return 0; |
177 | } | |
59e1205d JT |
178 | |
179 | int ls_refs_advertise(struct repository *r, struct strbuf *value) | |
180 | { | |
181 | if (value) { | |
182 | ensure_config_read(); | |
183 | if (advertise_unborn) | |
184 | strbuf_addstr(value, "unborn"); | |
185 | } | |
186 | ||
187 | return 1; | |
188 | } |