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Commit | Line | Data |
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98750588 | 1 | #include "git-compat-util.h" |
32a8f510 | 2 | #include "environment.h" |
f394e093 | 3 | #include "gettext.h" |
d1cbe1e6 | 4 | #include "hash.h" |
41771fa4 | 5 | #include "hex.h" |
72d0ea00 BW |
6 | #include "repository.h" |
7 | #include "refs.h" | |
dbbcd44f | 8 | #include "strvec.h" |
72d0ea00 BW |
9 | #include "ls-refs.h" |
10 | #include "pkt-line.h" | |
e20b4192 | 11 | #include "config.h" |
9b67eb6f | 12 | #include "string-list.h" |
72d0ea00 | 13 | |
c4716086 JK |
14 | static enum { |
15 | UNBORN_IGNORE = 0, | |
16 | UNBORN_ALLOW, | |
17 | UNBORN_ADVERTISE /* implies ALLOW */ | |
4b4e75dd | 18 | } unborn_config(struct repository *r) |
59e1205d JT |
19 | { |
20 | const char *str = NULL; | |
21 | ||
4b4e75dd | 22 | if (repo_config_get_string_tmp(r, "lsrefs.unborn", &str)) { |
59e1205d JT |
23 | /* |
24 | * If there is no such config, advertise and allow it by | |
25 | * default. | |
26 | */ | |
c4716086 | 27 | return UNBORN_ADVERTISE; |
59e1205d JT |
28 | } else { |
29 | if (!strcmp(str, "advertise")) { | |
c4716086 | 30 | return UNBORN_ADVERTISE; |
59e1205d | 31 | } else if (!strcmp(str, "allow")) { |
c4716086 | 32 | return UNBORN_ALLOW; |
59e1205d | 33 | } else if (!strcmp(str, "ignore")) { |
c4716086 | 34 | return UNBORN_IGNORE; |
59e1205d | 35 | } else { |
1a8aea85 JNA |
36 | die(_("invalid value for '%s': '%s'"), |
37 | "lsrefs.unborn", str); | |
59e1205d JT |
38 | } |
39 | } | |
59e1205d JT |
40 | } |
41 | ||
7f0e4f6a JK |
42 | /* |
43 | * If we see this many or more "ref-prefix" lines from the client, we consider | |
44 | * it "too many" and will avoid using the prefix feature entirely. | |
45 | */ | |
46 | #define TOO_MANY_PREFIXES 65536 | |
47 | ||
72d0ea00 BW |
48 | /* |
49 | * Check if one of the prefixes is a prefix of the ref. | |
50 | * If no prefixes were provided, all refs match. | |
51 | */ | |
ef8d7ac4 | 52 | static int ref_match(const struct strvec *prefixes, const char *refname) |
72d0ea00 BW |
53 | { |
54 | int i; | |
55 | ||
d70a9eb6 | 56 | if (!prefixes->nr) |
72d0ea00 BW |
57 | return 1; /* no restriction */ |
58 | ||
d70a9eb6 JK |
59 | for (i = 0; i < prefixes->nr; i++) { |
60 | const char *prefix = prefixes->v[i]; | |
72d0ea00 BW |
61 | |
62 | if (starts_with(refname, prefix)) | |
63 | return 1; | |
64 | } | |
65 | ||
66 | return 0; | |
67 | } | |
68 | ||
69 | struct ls_refs_data { | |
70 | unsigned peel; | |
71 | unsigned symrefs; | |
ef8d7ac4 | 72 | struct strvec prefixes; |
f54b9f21 | 73 | struct strbuf buf; |
c45841ff | 74 | struct strvec hidden_refs; |
59e1205d | 75 | unsigned unborn : 1; |
72d0ea00 BW |
76 | }; |
77 | ||
78 | static int send_ref(const char *refname, const struct object_id *oid, | |
79 | int flag, void *cb_data) | |
80 | { | |
81 | struct ls_refs_data *data = cb_data; | |
82 | const char *refname_nons = strip_namespace(refname); | |
f54b9f21 PS |
83 | |
84 | strbuf_reset(&data->buf); | |
72d0ea00 | 85 | |
9b67eb6f | 86 | if (ref_is_hidden(refname_nons, refname, &data->hidden_refs)) |
e20b4192 JK |
87 | return 0; |
88 | ||
e2f41a0a | 89 | if (!ref_match(&data->prefixes, refname_nons)) |
72d0ea00 BW |
90 | return 0; |
91 | ||
59e1205d | 92 | if (oid) |
f54b9f21 | 93 | strbuf_addf(&data->buf, "%s %s", oid_to_hex(oid), refname_nons); |
59e1205d | 94 | else |
f54b9f21 | 95 | strbuf_addf(&data->buf, "unborn %s", refname_nons); |
72d0ea00 BW |
96 | if (data->symrefs && flag & REF_ISSYMREF) { |
97 | struct object_id unused; | |
98 | const char *symref_target = resolve_ref_unsafe(refname, 0, | |
99 | &unused, | |
100 | &flag); | |
101 | ||
102 | if (!symref_target) | |
103 | die("'%s' is a symref but it is not?", refname); | |
104 | ||
f54b9f21 | 105 | strbuf_addf(&data->buf, " symref-target:%s", |
533e0882 | 106 | strip_namespace(symref_target)); |
72d0ea00 BW |
107 | } |
108 | ||
59e1205d | 109 | if (data->peel && oid) { |
72d0ea00 | 110 | struct object_id peeled; |
36a31792 | 111 | if (!peel_iterated_oid(oid, &peeled)) |
f54b9f21 | 112 | strbuf_addf(&data->buf, " peeled:%s", oid_to_hex(&peeled)); |
72d0ea00 BW |
113 | } |
114 | ||
f54b9f21 | 115 | strbuf_addch(&data->buf, '\n'); |
c2509c54 | 116 | packet_fwrite(stdout, data->buf.buf, data->buf.len); |
72d0ea00 | 117 | |
72d0ea00 BW |
118 | return 0; |
119 | } | |
120 | ||
59e1205d JT |
121 | static void send_possibly_unborn_head(struct ls_refs_data *data) |
122 | { | |
123 | struct strbuf namespaced = STRBUF_INIT; | |
124 | struct object_id oid; | |
125 | int flag; | |
126 | int oid_is_null; | |
127 | ||
128 | strbuf_addf(&namespaced, "%sHEAD", get_git_namespace()); | |
129 | if (!resolve_ref_unsafe(namespaced.buf, 0, &oid, &flag)) | |
130 | return; /* bad ref */ | |
131 | oid_is_null = is_null_oid(&oid); | |
132 | if (!oid_is_null || | |
133 | (data->unborn && data->symrefs && (flag & REF_ISSYMREF))) | |
134 | send_ref(namespaced.buf, oid_is_null ? NULL : &oid, flag, data); | |
135 | strbuf_release(&namespaced); | |
136 | } | |
137 | ||
783a86c1 | 138 | static int ls_refs_config(const char *var, const char *value, |
a4e7e317 | 139 | const struct config_context *ctx UNUSED, |
9b67eb6f | 140 | void *cb_data) |
e20b4192 | 141 | { |
9b67eb6f | 142 | struct ls_refs_data *data = cb_data; |
e20b4192 JK |
143 | /* |
144 | * We only serve fetches over v2 for now, so respect only "uploadpack" | |
145 | * config. This may need to eventually be expanded to "receive", but we | |
146 | * don't yet know how that information will be passed to ls-refs. | |
147 | */ | |
9b67eb6f | 148 | return parse_hide_refs_config(var, value, "uploadpack", &data->hidden_refs); |
e20b4192 JK |
149 | } |
150 | ||
28a592e4 | 151 | int ls_refs(struct repository *r, struct packet_reader *request) |
72d0ea00 BW |
152 | { |
153 | struct ls_refs_data data; | |
154 | ||
155 | memset(&data, 0, sizeof(data)); | |
83befd37 | 156 | strvec_init(&data.prefixes); |
f54b9f21 | 157 | strbuf_init(&data.buf, 0); |
c45841ff | 158 | strvec_init(&data.hidden_refs); |
72d0ea00 | 159 | |
9b67eb6f | 160 | git_config(ls_refs_config, &data); |
e20b4192 | 161 | |
4845b772 | 162 | while (packet_reader_read(request) == PACKET_READ_NORMAL) { |
72d0ea00 BW |
163 | const char *arg = request->line; |
164 | const char *out; | |
165 | ||
166 | if (!strcmp("peel", arg)) | |
167 | data.peel = 1; | |
168 | else if (!strcmp("symrefs", arg)) | |
169 | data.symrefs = 1; | |
7f0e4f6a JK |
170 | else if (skip_prefix(arg, "ref-prefix ", &out)) { |
171 | if (data.prefixes.nr < TOO_MANY_PREFIXES) | |
172 | strvec_push(&data.prefixes, out); | |
173 | } | |
59e1205d | 174 | else if (!strcmp("unborn", arg)) |
4b4e75dd | 175 | data.unborn = !!unborn_config(r); |
ccf09478 JK |
176 | else |
177 | die(_("unexpected line: '%s'"), arg); | |
72d0ea00 BW |
178 | } |
179 | ||
4845b772 JK |
180 | if (request->status != PACKET_READ_FLUSH) |
181 | die(_("expected flush after ls-refs arguments")); | |
182 | ||
7f0e4f6a JK |
183 | /* |
184 | * If we saw too many prefixes, we must avoid using them at all; as | |
185 | * soon as we have any prefix, they are meant to form a comprehensive | |
186 | * list. | |
187 | */ | |
188 | if (data.prefixes.nr >= TOO_MANY_PREFIXES) | |
189 | strvec_clear(&data.prefixes); | |
190 | ||
59e1205d | 191 | send_possibly_unborn_head(&data); |
b3970c70 TB |
192 | if (!data.prefixes.nr) |
193 | strvec_push(&data.prefixes, ""); | |
91e2ab15 JK |
194 | refs_for_each_fullref_in_prefixes(get_main_ref_store(r), |
195 | get_git_namespace(), data.prefixes.v, | |
98456eff | 196 | hidden_refs_to_excludes(&data.hidden_refs), |
91e2ab15 | 197 | send_ref, &data); |
70afef5c | 198 | packet_fflush(stdout); |
ef8d7ac4 | 199 | strvec_clear(&data.prefixes); |
f54b9f21 | 200 | strbuf_release(&data.buf); |
c45841ff | 201 | strvec_clear(&data.hidden_refs); |
72d0ea00 BW |
202 | return 0; |
203 | } | |
59e1205d JT |
204 | |
205 | int ls_refs_advertise(struct repository *r, struct strbuf *value) | |
206 | { | |
4b4e75dd | 207 | if (value && unborn_config(r) == UNBORN_ADVERTISE) |
c4716086 | 208 | strbuf_addstr(value, "unborn"); |
59e1205d JT |
209 | |
210 | return 1; | |
211 | } |