builtin-upload-tar.c

   1 /*
   2  * Copyright (c) 2006 Junio C Hamano
   3  */
   4 #include "cache.h"
   5 #include "pkt-line.h"
   6 #include "exec_cmd.h"
   7 #include "builtin.h"
   8
   9 static const char upload_tar_usage[] = "git-upload-tar <repo>";
  10
  11 static int nak(const char *reason)
  12 {
  13         packet_write(1, "NACK %s\n", reason);
  14         packet_flush(1);
  15         return 1;
  16 }
  17
  18 int cmd_upload_tar(int argc, const char **argv, const char *prefix)
  19 {
  20         int len;
  21         const char *dir = argv[1];
  22         char buf[8192];
  23         unsigned char sha1[20];
  24         char *base = NULL;
  25         char hex[41];
  26         int ac;
  27         const char *av[4];
  28
  29         if (argc != 2)
  30                 usage(upload_tar_usage);
  31         if (strlen(dir) < sizeof(buf)-1)
  32                 strcpy(buf, dir); /* enter-repo smudges its argument */
  33         else
  34                 packet_write(1, "NACK insanely long repository name %s\n", dir);
  35         if (!enter_repo(buf, 0)) {
  36                 packet_write(1, "NACK not a git archive %s\n", dir);
  37                 packet_flush(1);
  38                 return 1;
  39         }
  40
  41         len = packet_read_line(0, buf, sizeof(buf));
  42         if (len < 5 || strncmp("want ", buf, 5))
  43                 return nak("expected want");
  44         if (buf[len-1] == '\n')
  45                 buf[--len] = 0;
  46         if (get_sha1(buf + 5, sha1))
  47                 return nak("expected sha1");
  48         strcpy(hex, sha1_to_hex(sha1));
  49
  50         len = packet_read_line(0, buf, sizeof(buf));
  51         if (len) {
  52                 if (len < 5 || strncmp("base ", buf, 5))
  53                         return nak("expected (optional) base");
  54                 if (buf[len-1] == '\n')
  55                         buf[--len] = 0;
  56                 base = strdup(buf + 5);
  57                 len = packet_read_line(0, buf, sizeof(buf));
  58         }
  59         if (len)
  60                 return nak("expected flush");
  61
  62         packet_write(1, "ACK\n");
  63         packet_flush(1);
  64
  65         ac = 0;
  66         av[ac++] = "tar-tree";
  67         av[ac++] = hex;
  68         if (base)
  69                 av[ac++] = base;
  70         av[ac++] = NULL;
  71         execv_git_cmd(av);
  72         /* should it return that is an error */
  73         return 1;
  74 }