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[thirdparty/git.git] / builtin / upload-archive.c
CommitLineData
39345a21
FBH
1/*
2 * Copyright (c) 2006 Franck Bui-Huu
3 */
03eae9af 4#define USE_THE_REPOSITORY_VARIABLE
39345a21
FBH
5#include "builtin.h"
6#include "archive.h"
c339932b 7#include "path.h"
39345a21 8#include "pkt-line.h"
23d6d112 9#include "sideband.h"
1bc01efe 10#include "run-command.h"
dbbcd44f 11#include "strvec.h"
39345a21
FBH
12
13static const char upload_archive_usage[] =
f6a8ef07 14 "git upload-archive <repository>";
39345a21 15
23d6d112 16static const char deadchild[] =
1b1dd23f 17"git upload-archive: archiver died with error";
39345a21 18
7f4d0511 19#define MAX_ARGS (64)
23d6d112 20
9b1cb507
JC
21int cmd_upload_archive_writer(int argc,
22 const char **argv,
23 const char *prefix,
24 struct repository *repo UNUSED)
39345a21 25{
22f9b7f3 26 struct strvec sent_argv = STRVEC_INIT;
39345a21 27 const char *arg_cmd = "argument ";
149c9e20 28 int ret;
39345a21 29
a36a822d
JH
30 show_usage_if_asked(argc, argv, upload_archive_usage);
31 if (argc != 2)
f0c7fd49
JH
32 usage(upload_archive_usage);
33
6379dd05
JK
34 if (!enter_repo(argv[1], 0))
35 die("'%s' does not appear to be a git repository", argv[1]);
f0c7fd49 36
00436bf1
JS
37 init_archivers();
38
39345a21 39 /* put received options in sent_argv[] */
22f9b7f3 40 strvec_push(&sent_argv, "git-upload-archive");
090fd4fe 41 for (;;) {
74543a04
JK
42 char *buf = packet_read_line(0, NULL);
43 if (!buf)
39345a21 44 break; /* got a flush */
d70a9eb6 45 if (sent_argv.nr > MAX_ARGS)
090fd4fe 46 die("Too many options (>%d)", MAX_ARGS - 1);
39345a21 47
59556548 48 if (!starts_with(buf, arg_cmd))
090fd4fe 49 die("'argument' token or flush expected");
22f9b7f3 50 strvec_push(&sent_argv, buf + strlen(arg_cmd));
39345a21 51 }
f0c7fd49
JH
52
53 /* parse all options sent by the client */
149c9e20
PS
54 ret = write_archive(sent_argv.nr, sent_argv.v, prefix,
55 the_repository, NULL, 1);
56
57 strvec_clear(&sent_argv);
58 return ret;
23d6d112
JH
59}
60
28bea9e5 61__attribute__((format (printf, 1, 2)))
d3788e19
JH
62static void error_clnt(const char *fmt, ...)
63{
0cb9d6d6 64 struct strbuf buf = STRBUF_INIT;
d3788e19 65 va_list params;
d3788e19
JH
66
67 va_start(params, fmt);
0cb9d6d6 68 strbuf_vaddf(&buf, fmt, params);
d3788e19 69 va_end(params);
0cb9d6d6
JK
70 send_sideband(1, 3, buf.buf, buf.len, LARGE_PACKET_MAX);
71 die("sent error to the client: %s", buf.buf);
d3788e19
JH
72}
73
1b19fa46 74static ssize_t process_input(int child_fd, int band)
d3788e19
JH
75{
76 char buf[16384];
77 ssize_t sz = read(child_fd, buf, sizeof(buf));
78 if (sz < 0) {
93d26e4c 79 if (errno != EAGAIN && errno != EINTR)
d3788e19 80 error_clnt("read error: %s\n", strerror(errno));
1b19fa46 81 return sz;
d3788e19
JH
82 }
83 send_sideband(1, band, buf, sz, LARGE_PACKET_MAX);
1b19fa46 84 return sz;
d3788e19
JH
85}
86
9b1cb507
JC
87int cmd_upload_archive(int argc,
88const char **argv,
89const char *prefix,
90struct repository *repo UNUSED)
23d6d112 91{
c8a4cd55 92 struct child_process writer = CHILD_PROCESS_INIT;
1bc01efe 93
79156913
JK
94 BUG_ON_NON_EMPTY_PREFIX(prefix);
95
f66d1423 96 show_usage_if_asked(argc, argv, upload_archive_usage);
619b6c17 97
f0c7fd49
JH
98 /*
99 * Set up sideband subprocess.
100 *
101 * We (parent) monitor and read from child, sending its fd#1 and fd#2
102 * multiplexed out to our fd#1. If the child dies, we tell the other
103 * end over channel #3.
104 */
1bc01efe
JK
105 writer.out = writer.err = -1;
106 writer.git_cmd = 1;
c8a4cd55
ÆAB
107 strvec_push(&writer.args, "upload-archive--writer");
108 strvec_pushv(&writer.args, argv + 1);
1bc01efe 109 if (start_command(&writer)) {
23d6d112 110 int err = errno;
81c634e9 111 packet_write_fmt(1, "NACK unable to spawn subprocess\n");
23d6d112
JH
112 die("upload-archive: %s", strerror(err));
113 }
23d6d112 114
81c634e9 115 packet_write_fmt(1, "ACK\n");
39345a21
FBH
116 packet_flush(1);
117
23d6d112
JH
118 while (1) {
119 struct pollfd pfd[2];
23d6d112 120
1bc01efe 121 pfd[0].fd = writer.out;
23d6d112 122 pfd[0].events = POLLIN;
1bc01efe 123 pfd[1].fd = writer.err;
23d6d112
JH
124 pfd[1].events = POLLIN;
125 if (poll(pfd, 2, -1) < 0) {
126 if (errno != EINTR) {
17bef17e 127 error_errno("poll failed resuming");
23d6d112
JH
128 sleep(1);
129 }
130 continue;
131 }
d3788e19 132 if (pfd[1].revents & POLLIN)
23d6d112 133 /* Status stream ready */
6b59f51b
NP
134 if (process_input(pfd[1].fd, 2))
135 continue;
136 if (pfd[0].revents & POLLIN)
137 /* Data stream ready */
138 if (process_input(pfd[0].fd, 1))
139 continue;
d3788e19 140
1bc01efe 141 if (finish_command(&writer))
d3788e19 142 error_clnt("%s", deadchild);
23d6d112
JH
143 packet_flush(1);
144 break;
145 }
146 return 0;
147}