gitk: Second try to work around the command line limit on Windows
[git/dscho.git] / builtin / archive.c
blob6a887f5a9d785d23f1be76fd86fc17896b2b48d7
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)
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);
26 static int run_remote_archiver(int argc, const char **argv,
27 const char *remote, const char *exec)
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 die("git archive: protocol error");
55 len = packet_read_line(fd[0], buf, sizeof(buf));
56 if (len)
57 die("git archive: expected a flush");
59 /* Now, start reading from fd[0] and spit it out to stdout */
60 rv = recv_sideband("archive", fd[0], 1);
61 rv |= transport_disconnect(transport);
63 return !!rv;
66 static const char *format_from_name(const char *filename)
68 const char *ext = strrchr(filename, '.');
69 if (!ext)
70 return NULL;
71 ext++;
72 if (!strcasecmp(ext, "zip"))
73 return "--format=zip";
74 return NULL;
77 #define PARSE_OPT_KEEP_ALL ( PARSE_OPT_KEEP_DASHDASH | \
78 PARSE_OPT_KEEP_ARGV0 | \
79 PARSE_OPT_KEEP_UNKNOWN | \
80 PARSE_OPT_NO_INTERNAL_HELP )
82 int cmd_archive(int argc, const char **argv, const char *prefix)
84 const char *exec = "git-upload-archive";
85 const char *output = NULL;
86 const char *remote = NULL;
87 const char *format_option = NULL;
88 struct option local_opts[] = {
89 OPT_STRING('o', "output", &output, "file",
90 "write the archive to this file"),
91 OPT_STRING(0, "remote", &remote, "repo",
92 "retrieve the archive from remote repository <repo>"),
93 OPT_STRING(0, "exec", &exec, "cmd",
94 "path to the remote git-upload-archive command"),
95 OPT_END()
98 argc = parse_options(argc, argv, prefix, local_opts, NULL,
99 PARSE_OPT_KEEP_ALL);
101 if (output) {
102 create_output_file(output);
103 format_option = format_from_name(output);
107 * We have enough room in argv[] to muck it in place, because
108 * --output must have been given on the original command line
109 * if we get to this point, and parse_options() must have eaten
110 * it, i.e. we can add back one element to the array.
112 * We add a fake --format option at the beginning, with the
113 * format inferred from our output filename. This way explicit
114 * --format options can override it, and the fake option is
115 * inserted before any "--" that might have been given.
117 if (format_option) {
118 memmove(argv + 2, argv + 1, sizeof(*argv) * argc);
119 argv[1] = format_option;
120 argv[++argc] = NULL;
123 if (remote)
124 return run_remote_archiver(argc, argv, remote, exec);
126 setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
128 return write_archive(argc, argv, prefix, 1);