builtin-tar-tree.c

   1 /*
   2  * Copyright (c) 2005, 2006 Rene Scharfe
   3  */
   4 #include <time.h>
   5 #include "cache.h"
   6 #include "commit.h"
   7 #include "tar.h"
   8 #include "builtin.h"
   9 #include "quote.h"
  10
  11 static const char tar_tree_usage[] =
  12 "git-tar-tree [--remote=<repo>] <tree-ish> [basedir]\n"
  13 "*** Note that this command is now deprecated; use git-archive instead.";
  14
  15 int cmd_tar_tree(int argc, const char **argv, const char *prefix)
  16 {
  17         /*
  18          * git-tar-tree is now a wrapper around git-archive --format=tar
  19          *
  20          * $0 --remote=<repo> arg... ==>
  21          *      git-archive --format=tar --remote=<repo> arg...
  22          * $0 tree-ish ==>
  23          *      git-archive --format=tar tree-ish
  24          * $0 tree-ish basedir ==>
  25          *      git-archive --format-tar --prefix=basedir tree-ish
  26          */
  27         int i;
  28         const char **nargv = xcalloc(sizeof(*nargv), argc + 2);
  29         char *basedir_arg;
  30         int nargc = 0;
  31
  32         nargv[nargc++] = "git-archive";
  33         nargv[nargc++] = "--format=tar";
  34
  35         if (2 <= argc && !strncmp("--remote=", argv[1], 9)) {
  36                 nargv[nargc++] = argv[1];
  37                 argv++;
  38                 argc--;
  39         }
  40         switch (argc) {
  41         default:
  42                 usage(tar_tree_usage);
  43                 break;
  44         case 3:
  45                 /* base-path */
  46                 basedir_arg = xmalloc(strlen(argv[2]) + 11);
  47                 sprintf(basedir_arg, "--prefix=%s/", argv[2]);
  48                 nargv[nargc++] = basedir_arg;
  49                 /* fallthru */
  50         case 2:
  51                 /* tree-ish */
  52                 nargv[nargc++] = argv[1];
  53         }
  54         nargv[nargc] = NULL;
  55
  56         fprintf(stderr,
  57                 "*** git-tar-tree is now deprecated.\n"
  58                 "*** Running git-archive instead.\n***");
  59         for (i = 0; i < nargc; i++) {
  60                 fputc(' ', stderr);
  61                 sq_quote_print(stderr, nargv[i]);
  62         }
  63         fputc('\n', stderr);
  64         return cmd_archive(nargc, nargv, prefix);
  65 }
  66
  67 /* ustar header + extended global header content */
  68 #define RECORDSIZE      (512)
  69 #define HEADERSIZE (2 * RECORDSIZE)
  70
  71 int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix)
  72 {
  73         char buffer[HEADERSIZE];
  74         struct ustar_header *header = (struct ustar_header *)buffer;
  75         char *content = buffer + RECORDSIZE;
  76         ssize_t n;
  77
  78         n = xread(0, buffer, HEADERSIZE);
  79         if (n < HEADERSIZE)
  80                 die("git-get-tar-commit-id: read error");
  81         if (header->typeflag[0] != 'g')
  82                 return 1;
  83         if (memcmp(content, "52 comment=", 11))
  84                 return 1;
  85
  86         n = xwrite(1, content + 11, 41);
  87         if (n < 41)
  88                 die("git-get-tar-commit-id: write error");
  89
  90         return 0;
  91 }