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 + 2);
  28        char *basedir_arg;
  29        int nargc = 0;
  30
  31        nargv[nargc++] = "git-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        switch (argc) {
  40        default:
  41                usage(tar_tree_usage);
  42                break;
  43        case 3:
  44                /* base-path */
  45                basedir_arg = xmalloc(strlen(argv[2]) + 11);
  46                sprintf(basedir_arg, "--prefix=%s/", argv[2]);
  47                nargv[nargc++] = basedir_arg;
  48                /* fallthru */
  49        case 2:
  50                /* tree-ish */
  51                nargv[nargc++] = argv[1];
  52        }
  53        nargv[nargc] = NULL;
  54
  55        fprintf(stderr,
  56                "*** git-tar-tree is now deprecated.\n"
  57                "*** Running git-archive instead.\n***");
  58        for (i = 0; i < nargc; i++) {
  59                fputc(' ', stderr);
  60                sq_quote_print(stderr, nargv[i]);
  61        }
  62        fputc('\n', stderr);
  63        return cmd_archive(nargc, nargv, prefix);
  64}
  65
  66/* ustar header + extended global header content */
  67#define RECORDSIZE      (512)
  68#define HEADERSIZE (2 * RECORDSIZE)
  69
  70int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix)
  71{
  72        char buffer[HEADERSIZE];
  73        struct ustar_header *header = (struct ustar_header *)buffer;
  74        char *content = buffer + RECORDSIZE;
  75        ssize_t n;
  76
  77        n = read_in_full(0, buffer, HEADERSIZE);
  78        if (n < HEADERSIZE)
  79                die("git-get-tar-commit-id: read error");
  80        if (header->typeflag[0] != 'g')
  81                return 1;
  82        if (memcmp(content, "52 comment=", 11))
  83                return 1;
  84
  85        n = write_in_full(1, content + 11, 41);
  86        if (n < 41)
  87                die("git-get-tar-commit-id: write error");
  88
  89        return 0;
  90}