submodule: Use cat instead of echo to avoid DOS line-endings
[git/dscho.git] / builtin / tar-tree.c
blob3f1e7012db1af7d3695e6517956721a313229d65
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"
10 static 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.";
14 static const char builtin_get_tar_commit_id_usage[] =
15 "git get-tar-commit-id < <tarfile>";
17 int cmd_tar_tree(int argc, const char **argv, const char *prefix)
20 * "git tar-tree" is now a wrapper around "git archive --format=tar"
22 * $0 --remote=<repo> arg... ==>
23 * git archive --format=tar --remote=<repo> arg...
24 * $0 tree-ish ==>
25 * git archive --format=tar tree-ish
26 * $0 tree-ish basedir ==>
27 * git archive --format-tar --prefix=basedir tree-ish
29 int i;
30 const char **nargv = xcalloc(sizeof(*nargv), argc + 3);
31 char *basedir_arg;
32 int nargc = 0;
34 nargv[nargc++] = "archive";
35 nargv[nargc++] = "--format=tar";
37 if (2 <= argc && !prefixcmp(argv[1], "--remote=")) {
38 nargv[nargc++] = argv[1];
39 argv++;
40 argc--;
44 * Because it's just a compatibility wrapper, tar-tree supports only
45 * the old behaviour of reading attributes from the work tree.
47 nargv[nargc++] = "--worktree-attributes";
49 switch (argc) {
50 default:
51 usage(tar_tree_usage);
52 break;
53 case 3:
54 /* base-path */
55 basedir_arg = xmalloc(strlen(argv[2]) + 11);
56 sprintf(basedir_arg, "--prefix=%s/", argv[2]);
57 nargv[nargc++] = basedir_arg;
58 /* fallthru */
59 case 2:
60 /* tree-ish */
61 nargv[nargc++] = argv[1];
63 nargv[nargc] = NULL;
65 fprintf(stderr,
66 "*** \"git tar-tree\" is now deprecated.\n"
67 "*** Running \"git archive\" instead.\n***");
68 for (i = 0; i < nargc; i++) {
69 fputc(' ', stderr);
70 sq_quote_print(stderr, nargv[i]);
72 fputc('\n', stderr);
73 return cmd_archive(nargc, nargv, prefix);
76 /* ustar header + extended global header content */
77 #define RECORDSIZE (512)
78 #define HEADERSIZE (2 * RECORDSIZE)
80 int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix)
82 char buffer[HEADERSIZE];
83 struct ustar_header *header = (struct ustar_header *)buffer;
84 char *content = buffer + RECORDSIZE;
85 ssize_t n;
87 if (argc != 1)
88 usage(builtin_get_tar_commit_id_usage);
90 n = read_in_full(0, buffer, HEADERSIZE);
91 if (n < HEADERSIZE)
92 die("git get-tar-commit-id: read error");
93 if (header->typeflag[0] != 'g')
94 return 1;
95 if (memcmp(content, "52 comment=", 11))
96 return 1;
98 n = write_in_full(1, content + 11, 41);
99 if (n < 41)
100 die_errno("git get-tar-commit-id: write error");
102 return 0;