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, exec_value_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                 } else if (!strcmp(arg, "--exec")) {
  28                         if (exec_at)
  29                                 die("multiple --exec specified");
  30                         if (i + 1 >= argc)
  31                                 die("option --exec requires a value");
  32                         exec = argv[i + 1];
  33                         exec_at = i;
  34                         exec_value_at = ++i;
  35                 }
  36         }
  37
  38         url = xstrdup(remote);
  39         conn = git_connect(fd, url, exec, 0);
  40
  41         for (i = 1; i < argc; i++) {
  42                 if (i == exec_at || i == exec_value_at)
  43                         continue;
  44                 packet_write(fd[1], "argument %s\n", argv[i]);
  45         }
  46         packet_flush(fd[1]);
  47
  48         len = packet_read_line(fd[0], buf, sizeof(buf));
  49         if (!len)
  50                 die("git archive: expected ACK/NAK, got EOF");
  51         if (buf[len-1] == '\n')
  52                 buf[--len] = 0;
  53         if (strcmp(buf, "ACK")) {
  54                 if (len > 5 && !prefixcmp(buf, "NACK "))
  55                         die("git archive: NACK %s", buf + 5);
  56                 die("git archive: protocol error");
  57         }
  58
  59         len = packet_read_line(fd[0], buf, sizeof(buf));
  60         if (len)
  61                 die("git archive: expected a flush");
  62
  63         /* Now, start reading from fd[0] and spit it out to stdout */
  64         rv = recv_sideband("archive", fd[0], 1, 2);
  65         close(fd[0]);
  66         close(fd[1]);
  67         rv |= finish_connect(conn);
  68
  69         return !!rv;
  70 }
  71
  72 static const char *extract_remote_arg(int *ac, const char **av)
  73 {
  74         int ix, iy, cnt = *ac;
  75         int no_more_options = 0;
  76         const char *remote = NULL;
  77
  78         for (ix = iy = 1; ix < cnt; ix++) {
  79                 const char *arg = av[ix];
  80                 if (!strcmp(arg, "--"))
  81                         no_more_options = 1;
  82                 if (!no_more_options) {
  83                         if (!prefixcmp(arg, "--remote=")) {
  84                                 if (remote)
  85                                         die("Multiple --remote specified");
  86                                 remote = arg + 9;
  87                                 continue;
  88                         } else if (!strcmp(arg, "--remote")) {
  89                                 if (remote)
  90                                         die("Multiple --remote specified");
  91                                 if (++ix >= cnt)
  92                                         die("option --remote requires a value");
  93                                 remote = av[ix];
  94                                 continue;
  95                         }
  96                         if (arg[0] != '-')
  97                                 no_more_options = 1;
  98                 }
  99                 if (ix != iy)
 100                         av[iy] = arg;
 101                 iy++;
 102         }
 103         if (remote) {
 104                 av[--cnt] = NULL;
 105                 *ac = cnt;
 106         }
 107         return remote;
 108 }
 109
 110 int cmd_archive(int argc, const char **argv, const char *prefix)
 111 {
 112         const char *remote = NULL;
 113
 114         remote = extract_remote_arg(&argc, argv);
 115         if (remote)
 116                 return run_remote_archiver(remote, argc, argv);
 117
 118         setvbuf(stderr, NULL, _IOLBF, BUFSIZ);
 119
 120         return write_archive(argc, argv, prefix, 1);
 121 }