fetch: Allow transport -v -v -v to set verbosity to 3
[git/git.git] / transport-helper.c
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1#include "cache.h"
2#include "transport.h"
3
4#include "run-command.h"
5#include "commit.h"
6#include "diff.h"
7#include "revision.h"
8
9struct helper_data
10{
11 const char *name;
12 struct child_process *helper;
13 unsigned fetch : 1;
14};
15
16static struct child_process *get_helper(struct transport *transport)
17{
18 struct helper_data *data = transport->data;
19 struct strbuf buf = STRBUF_INIT;
20 struct child_process *helper;
21 FILE *file;
22
23 if (data->helper)
24 return data->helper;
25
26 helper = xcalloc(1, sizeof(*helper));
27 helper->in = -1;
28 helper->out = -1;
29 helper->err = 0;
30 helper->argv = xcalloc(4, sizeof(*helper->argv));
31 strbuf_addf(&buf, "remote-%s", data->name);
32 helper->argv[0] = strbuf_detach(&buf, NULL);
33 helper->argv[1] = transport->remote->name;
34 helper->argv[2] = transport->url;
35 helper->git_cmd = 1;
36 if (start_command(helper))
37 die("Unable to run helper: git %s", helper->argv[0]);
38 data->helper = helper;
39
3d913526 40 write_str_in_full(helper->in, "capabilities\n");
2d14d65c 41
41698375 42 file = xfdopen(helper->out, "r");
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43 while (1) {
44 if (strbuf_getline(&buf, file, '\n') == EOF)
45 exit(128); /* child died, message supplied already */
46
47 if (!*buf.buf)
48 break;
49 if (!strcmp(buf.buf, "fetch"))
50 data->fetch = 1;
51 }
52 return data->helper;
53}
54
55static int disconnect_helper(struct transport *transport)
56{
57 struct helper_data *data = transport->data;
58 if (data->helper) {
3d913526 59 write_str_in_full(data->helper->in, "\n");
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60 close(data->helper->in);
61 finish_command(data->helper);
62 free((char *)data->helper->argv[0]);
63 free(data->helper->argv);
64 free(data->helper);
65 data->helper = NULL;
66 }
67 return 0;
68}
69
70static int fetch_with_fetch(struct transport *transport,
71 int nr_heads, const struct ref **to_fetch)
72{
73 struct child_process *helper = get_helper(transport);
41698375 74 FILE *file = xfdopen(helper->out, "r");
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75 int i;
76 struct strbuf buf = STRBUF_INIT;
77
78 for (i = 0; i < nr_heads; i++) {
1088261f 79 const struct ref *posn = to_fetch[i];
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80 if (posn->status & REF_STATUS_UPTODATE)
81 continue;
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82
83 strbuf_addf(&buf, "fetch %s %s\n",
84 sha1_to_hex(posn->old_sha1), posn->name);
85 write_in_full(helper->in, buf.buf, buf.len);
86 strbuf_reset(&buf);
87
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88 if (strbuf_getline(&buf, file, '\n') == EOF)
89 exit(128); /* child died, message supplied already */
90 }
91 return 0;
92}
93
94static int fetch(struct transport *transport,
95 int nr_heads, const struct ref **to_fetch)
96{
97 struct helper_data *data = transport->data;
98 int i, count;
99
100 count = 0;
101 for (i = 0; i < nr_heads; i++)
102 if (!(to_fetch[i]->status & REF_STATUS_UPTODATE))
103 count++;
104
105 if (!count)
106 return 0;
107
108 if (data->fetch)
109 return fetch_with_fetch(transport, nr_heads, to_fetch);
110
111 return -1;
112}
113
114static struct ref *get_refs_list(struct transport *transport, int for_push)
115{
116 struct child_process *helper;
117 struct ref *ret = NULL;
118 struct ref **tail = &ret;
119 struct ref *posn;
120 struct strbuf buf = STRBUF_INIT;
121 FILE *file;
122
123 helper = get_helper(transport);
2d14d65c 124
3d913526 125 write_str_in_full(helper->in, "list\n");
6eb996b5 126
41698375 127 file = xfdopen(helper->out, "r");
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128 while (1) {
129 char *eov, *eon;
130 if (strbuf_getline(&buf, file, '\n') == EOF)
131 exit(128); /* child died, message supplied already */
132
133 if (!*buf.buf)
134 break;
135
136 eov = strchr(buf.buf, ' ');
137 if (!eov)
138 die("Malformed response in ref list: %s", buf.buf);
139 eon = strchr(eov + 1, ' ');
140 *eov = '\0';
141 if (eon)
142 *eon = '\0';
143 *tail = alloc_ref(eov + 1);
144 if (buf.buf[0] == '@')
145 (*tail)->symref = xstrdup(buf.buf + 1);
146 else if (buf.buf[0] != '?')
147 get_sha1_hex(buf.buf, (*tail)->old_sha1);
148 tail = &((*tail)->next);
149 }
150 strbuf_release(&buf);
151
152 for (posn = ret; posn; posn = posn->next)
153 resolve_remote_symref(posn, ret);
154
155 return ret;
156}
157
c9e388bb 158int transport_helper_init(struct transport *transport, const char *name)
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159{
160 struct helper_data *data = xcalloc(sizeof(*data), 1);
c9e388bb 161 data->name = name;
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162
163 transport->data = data;
164 transport->get_refs_list = get_refs_list;
165 transport->fetch = fetch;
166 transport->disconnect = disconnect_helper;
167 return 0;
168}