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"
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 }
26 static int run_remote_archiver(int argc, const char **argv,
27 const char *remote, const char *exec)
28 {
29 char buf[LARGE_PACKET_MAX];
30 int fd[2], i, len, rv;
31 struct transport *transport;
32 struct remote *_remote;
34 _remote = remote_get(remote);
35 if (!_remote->url[0])
36 die(_("git archive: Remote with no URL"));
37 transport = transport_get(_remote, _remote->url[0]);
38 transport_connect(transport, "git-upload-archive", exec, fd);
40 for (i = 1; i < argc; i++)
41 packet_write(fd[1], "argument %s\n", argv[i]);
42 packet_flush(fd[1]);
44 len = packet_read_line(fd[0], buf, sizeof(buf));
45 if (!len)
46 die(_("git archive: expected ACK/NAK, got EOF"));
47 if (buf[len-1] == '\n')
48 buf[--len] = 0;
49 if (strcmp(buf, "ACK")) {
50 if (len > 5 && !prefixcmp(buf, "NACK "))
51 die(_("git archive: NACK %s"), buf + 5);
52 if (len > 4 && !prefixcmp(buf, "ERR "))
53 die(_("remote error: %s"), buf + 4);
54 die(_("git archive: protocol error"));
55 }
57 len = packet_read_line(fd[0], buf, sizeof(buf));
58 if (len)
59 die(_("git archive: expected a flush"));
61 /* Now, start reading from fd[0] and spit it out to stdout */
62 rv = recv_sideband("archive", fd[0], 1);
63 rv |= transport_disconnect(transport);
65 return !!rv;
66 }
68 static const char *format_from_name(const char *filename)
69 {
70 const char *ext = strrchr(filename, '.');
71 if (!ext)
72 return NULL;
73 ext++;
74 if (!strcasecmp(ext, "zip"))
75 return "--format=zip";
76 return NULL;
77 }
79 #define PARSE_OPT_KEEP_ALL ( PARSE_OPT_KEEP_DASHDASH | \
80 PARSE_OPT_KEEP_ARGV0 | \
81 PARSE_OPT_KEEP_UNKNOWN | \
82 PARSE_OPT_NO_INTERNAL_HELP )
84 int cmd_archive(int argc, const char **argv, const char *prefix)
85 {
86 const char *exec = "git-upload-archive";
87 const char *output = NULL;
88 const char *remote = NULL;
89 const char *format_option = NULL;
90 struct option local_opts[] = {
91 OPT_STRING('o', "output", &output, "file",
92 "write the archive to this file"),
93 OPT_STRING(0, "remote", &remote, "repo",
94 "retrieve the archive from remote repository <repo>"),
95 OPT_STRING(0, "exec", &exec, "cmd",
96 "path to the remote git-upload-archive command"),
97 OPT_END()
98 };
100 argc = parse_options(argc, argv, prefix, local_opts, NULL,
101 PARSE_OPT_KEEP_ALL);
103 if (output) {
104 create_output_file(output);
105 format_option = format_from_name(output);
106 }
108 /*
109 * We have enough room in argv[] to muck it in place, because
110 * --output must have been given on the original command line
111 * if we get to this point, and parse_options() must have eaten
112 * it, i.e. we can add back one element to the array.
113 *
114 * We add a fake --format option at the beginning, with the
115 * format inferred from our output filename. This way explicit
116 * --format options can override it, and the fake option is
117 * inserted before any "--" that might have been given.
118 */
119 if (format_option) {
120 memmove(argv + 2, argv + 1, sizeof(*argv) * argc);
121 argv[1] = format_option;
122 argv[++argc] = NULL;
123 }
125 if (remote)
126 return run_remote_archiver(argc, argv, remote, exec);
128 setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
130 return write_archive(argc, argv, prefix, 1);
131 }