1 /*
2 * Copyright (c) 2006 Franck Bui-Huu
3 * Copyright (c) 2006 Rene Scharfe
4 */
5 #include "cache.h"
6 #include "builtin.h"
7 #include "archive.h"
8 #include "transport.h"
9 #include "parse-options.h"
10 #include "pkt-line.h"
11 #include "sideband.h"
12
create_output_file(const char * output_file)13 static void create_output_file(const char *output_file)
14 {
15 int output_fd = open(output_file, O_CREAT | O_WRONLY | O_TRUNC, 0666);
16 if (output_fd < 0)
17 die_errno(_("could not create archive file '%s'"), output_file);
18 if (output_fd != 1) {
19 if (dup2(output_fd, 1) < 0)
20 die_errno(_("could not redirect output"));
21 else
22 close(output_fd);
23 }
24 }
25
run_remote_archiver(int argc,const char ** argv,const char * remote,const char * exec,const char * name_hint)26 static int run_remote_archiver(int argc, const char **argv,
27 const char *remote, const char *exec,
28 const char *name_hint)
29 {
30 int fd[2], i, rv;
31 struct transport *transport;
32 struct remote *_remote;
33 struct packet_reader reader;
34
35 _remote = remote_get(remote);
36 if (!_remote->url[0])
37 die(_("git archive: Remote with no URL"));
38 transport = transport_get(_remote, _remote->url[0]);
39 transport_connect(transport, "git-upload-archive", exec, fd);
40
41 /*
42 * Inject a fake --format field at the beginning of the
43 * arguments, with the format inferred from our output
44 * filename. This way explicit --format options can override
45 * it.
46 */
47 if (name_hint) {
48 const char *format = archive_format_from_filename(name_hint);
49 if (format)
50 packet_write_fmt(fd[1], "argument --format=%s\n", format);
51 }
52 for (i = 1; i < argc; i++)
53 packet_write_fmt(fd[1], "argument %s\n", argv[i]);
54 packet_flush(fd[1]);
55
56 packet_reader_init(&reader, fd[0], NULL, 0,
57 PACKET_READ_CHOMP_NEWLINE |
58 PACKET_READ_DIE_ON_ERR_PACKET);
59
60 if (packet_reader_read(&reader) != PACKET_READ_NORMAL)
61 die(_("git archive: expected ACK/NAK, got a flush packet"));
62 if (strcmp(reader.line, "ACK")) {
63 if (starts_with(reader.line, "NACK "))
64 die(_("git archive: NACK %s"), reader.line + 5);
65 die(_("git archive: protocol error"));
66 }
67
68 if (packet_reader_read(&reader) != PACKET_READ_FLUSH)
69 die(_("git archive: expected a flush"));
70
71 /* Now, start reading from fd[0] and spit it out to stdout */
72 rv = recv_sideband("archive", fd[0], 1);
73 rv |= transport_disconnect(transport);
74
75 return !!rv;
76 }
77
78 #define PARSE_OPT_KEEP_ALL ( PARSE_OPT_KEEP_DASHDASH | \
79 PARSE_OPT_KEEP_ARGV0 | \
80 PARSE_OPT_KEEP_UNKNOWN | \
81 PARSE_OPT_NO_INTERNAL_HELP )
82
cmd_archive(int argc,const char ** argv,const char * prefix)83 int cmd_archive(int argc, const char **argv, const char *prefix)
84 {
85 const char *exec = "git-upload-archive";
86 const char *output = NULL;
87 const char *remote = NULL;
88 struct option local_opts[] = {
89 OPT_FILENAME('o', "output", &output,
90 N_("write the archive to this file")),
91 OPT_STRING(0, "remote", &remote, N_("repo"),
92 N_("retrieve the archive from remote repository <repo>")),
93 OPT_STRING(0, "exec", &exec, N_("command"),
94 N_("path to the remote git-upload-archive command")),
95 OPT_END()
96 };
97
98 argc = parse_options(argc, argv, prefix, local_opts, NULL,
99 PARSE_OPT_KEEP_ALL);
100
101 init_archivers();
102
103 if (output)
104 create_output_file(output);
105
106 if (remote)
107 return run_remote_archiver(argc, argv, remote, exec, output);
108
109 setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
110
111 return write_archive(argc, argv, prefix, the_repository, output, 0);
112 }
113