builtin-archive.c

   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 "pkt-line.h"
   9 #include "sideband.h"
  10
  11 static int run_remote_archiver(const char *remote, int argc,
  12                                const char **argv)
  13 {
  14         char *url, buf[LARGE_PACKET_MAX];
  15         int fd[2], i, len, rv;
  16         struct child_process *conn;
  17         const char *exec = "git-upload-archive";
  18         int exec_at = 0;
  19
  20         for (i = 1; i < argc; i++) {
  21                 const char *arg = argv[i];
  22                 if (!prefixcmp(arg, "--exec=")) {
  23                         if (exec_at)
  24                                 die("multiple --exec specified");
  25                         exec = arg + 7;
  26                         exec_at = i;
  27                         break;
  28                 }
  29         }
  30
  31         url = xstrdup(remote);
  32         conn = git_connect(fd, url, exec, 0);
  33
  34         for (i = 1; i < argc; i++) {
  35                 if (i == exec_at)
  36                         continue;
  37                 packet_write(fd[1], "argument %s\n", argv[i]);
  38         }
  39         packet_flush(fd[1]);
  40
  41         len = packet_read_line(fd[0], buf, sizeof(buf));
  42         if (!len)
  43                 die("git-archive: expected ACK/NAK, got EOF");
  44         if (buf[len-1] == '\n')
  45                 buf[--len] = 0;
  46         if (strcmp(buf, "ACK")) {
  47                 if (len > 5 && !prefixcmp(buf, "NACK "))
  48                         die("git-archive: NACK %s", buf + 5);
  49                 die("git-archive: protocol error");
  50         }
  51
  52         len = packet_read_line(fd[0], buf, sizeof(buf));
  53         if (len)
  54                 die("git-archive: expected a flush");
  55
  56         /* Now, start reading from fd[0] and spit it out to stdout */
  57         rv = recv_sideband("archive", fd[0], 1, 2);
  58         close(fd[0]);
  59         close(fd[1]);
  60         rv |= finish_connect(conn);
  61
  62         return !!rv;
  63 }
  64
  65 static const char *extract_remote_arg(int *ac, const char **av)
  66 {
  67         int ix, iy, cnt = *ac;
  68         int no_more_options = 0;
  69         const char *remote = NULL;
  70
  71         for (ix = iy = 1; ix < cnt; ix++) {
  72                 const char *arg = av[ix];
  73                 if (!strcmp(arg, "--"))
  74                         no_more_options = 1;
  75                 if (!no_more_options) {
  76                         if (!prefixcmp(arg, "--remote=")) {
  77                                 if (remote)
  78                                         die("Multiple --remote specified");
  79                                 remote = arg + 9;
  80                                 continue;
  81                         }
  82                         if (arg[0] != '-')
  83                                 no_more_options = 1;
  84                 }
  85                 if (ix != iy)
  86                         av[iy] = arg;
  87                 iy++;
  88         }
  89         if (remote) {
  90                 av[--cnt] = NULL;
  91                 *ac = cnt;
  92         }
  93         return remote;
  94 }
  95
  96 int cmd_archive(int argc, const char **argv, const char *prefix)
  97 {
  98         const char *remote = NULL;
  99
 100         remote = extract_remote_arg(&argc, argv);
 101         if (remote)
 102                 return run_remote_archiver(remote, argc, argv);
 103
 104         setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
 105
 106         return write_archive(argc, argv, prefix, 1);
 107 }