Andrew's git - gitweb.git/blob - builtin-tar-tree.c

   1/*
   2 * Copyright (c) 2005, 2006 Rene Scharfe
   3 */
   4#include "cache.h"
   5#include "commit.h"
   6#include "tar.h"
   7#include "builtin.h"
   8#include "quote.h"
   9
  10static const char tar_tree_usage[] =
  11"git tar-tree [--remote=<repo>] <tree-ish> [basedir]\n"
  12"*** Note that this command is now deprecated; use \"git archive\" instead.";
  13
  14int cmd_tar_tree(int argc, const char **argv, const char *prefix)
  15{
  16        /*
  17         * "git tar-tree" is now a wrapper around "git archive --format=tar"
  18         *
  19         * $0 --remote=<repo> arg... ==>
  20         *      git archive --format=tar --remote=<repo> arg...
  21         * $0 tree-ish ==>
  22         *      git archive --format=tar tree-ish
  23         * $0 tree-ish basedir ==>
  24         *      git archive --format-tar --prefix=basedir tree-ish
  25         */
  26        int i;
  27        const char **nargv = xcalloc(sizeof(*nargv), argc + 3);
  28        char *basedir_arg;
  29        int nargc = 0;
  30
  31        nargv[nargc++] = "archive";
  32        nargv[nargc++] = "--format=tar";
  33
  34        if (2 <= argc && !prefixcmp(argv[1], "--remote=")) {
  35                nargv[nargc++] = argv[1];
  36                argv++;
  37                argc--;
  38        }
  39
  40        /*
  41         * Because it's just a compatibility wrapper, tar-tree supports only
  42         * the old behaviour of reading attributes from the work tree.
  43         */
  44        nargv[nargc++] = "--worktree-attributes";
  45
  46        switch (argc) {
  47        default:
  48                usage(tar_tree_usage);
  49                break;
  50        case 3:
  51                /* base-path */
  52                basedir_arg = xmalloc(strlen(argv[2]) + 11);
  53                sprintf(basedir_arg, "--prefix=%s/", argv[2]);
  54                nargv[nargc++] = basedir_arg;
  55                /* fallthru */
  56        case 2:
  57                /* tree-ish */
  58                nargv[nargc++] = argv[1];
  59        }
  60        nargv[nargc] = NULL;
  61
  62        fprintf(stderr,
  63                "*** \"git tar-tree\" is now deprecated.\n"
  64                "*** Running \"git archive\" instead.\n***");
  65        for (i = 0; i < nargc; i++) {
  66                fputc(' ', stderr);
  67                sq_quote_print(stderr, nargv[i]);
  68        }
  69        fputc('\n', stderr);
  70        return cmd_archive(nargc, nargv, prefix);
  71}
  72
  73/* ustar header + extended global header content */
  74#define RECORDSIZE      (512)
  75#define HEADERSIZE (2 * RECORDSIZE)
  76
  77int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix)
  78{
  79        char buffer[HEADERSIZE];
  80        struct ustar_header *header = (struct ustar_header *)buffer;
  81        char *content = buffer + RECORDSIZE;
  82        ssize_t n;
  83
  84        n = read_in_full(0, buffer, HEADERSIZE);
  85        if (n < HEADERSIZE)
  86                die("git get-tar-commit-id: read error");
  87        if (header->typeflag[0] != 'g')
  88                return 1;
  89        if (memcmp(content, "52 comment=", 11))
  90                return 1;
  91
  92        n = write_in_full(1, content + 11, 41);
  93        if (n < 41)
  94                die("git get-tar-commit-id: write error");
  95
  96        return 0;
  97}