builtin-ls-tree.c

   1 /*
   2  * GIT - The information manager from hell
   3  *
   4  * Copyright (C) Linus Torvalds, 2005
   5  */
   6 #include "cache.h"
   7 #include "blob.h"
   8 #include "tree.h"
   9 #include "commit.h"
  10 #include "quote.h"
  11 #include "builtin.h"
  12
  13 static int line_termination = '\n';
  14 #define LS_RECURSIVE 1
  15 #define LS_TREE_ONLY 2
  16 #define LS_SHOW_TREES 4
  17 #define LS_NAME_ONLY 8
  18 #define LS_SHOW_SIZE 16
  19 static int abbrev;
  20 static int ls_options;
  21 static const char **pathspec;
  22 static int chomp_prefix;
  23 static const char *ls_tree_prefix;
  24
  25 static const char ls_tree_usage[] =
  26         "git-ls-tree [-d] [-r] [-t] [-l] [-z] [--name-only] [--name-status] [--full-name] [--abbrev[=<n>]] <tree-ish> [path...]";
  27
  28 static int show_recursive(const char *base, int baselen, const char *pathname)
  29 {
  30         const char **s;
  31
  32         if (ls_options & LS_RECURSIVE)
  33                 return 1;
  34
  35         s = pathspec;
  36         if (!s)
  37                 return 0;
  38
  39         for (;;) {
  40                 const char *spec = *s++;
  41                 int len, speclen;
  42
  43                 if (!spec)
  44                         return 0;
  45                 if (strncmp(base, spec, baselen))
  46                         continue;
  47                 len = strlen(pathname);
  48                 spec += baselen;
  49                 speclen = strlen(spec);
  50                 if (speclen <= len)
  51                         continue;
  52                 if (memcmp(pathname, spec, len))
  53                         continue;
  54                 return 1;
  55         }
  56 }
  57
  58 static int show_tree(const unsigned char *sha1, const char *base, int baselen,
  59                      const char *pathname, unsigned mode, int stage)
  60 {
  61         int retval = 0;
  62         const char *type = blob_type;
  63         unsigned long size;
  64
  65         if (S_ISGITLINK(mode)) {
  66                 /*
  67                  * Maybe we want to have some recursive version here?
  68                  *
  69                  * Something like:
  70                  *
  71                 if (show_subprojects(base, baselen, pathname)) {
  72                         if (fork()) {
  73                                 chdir(base);
  74                                 exec ls-tree;
  75                         }
  76                         waitpid();
  77                 }
  78                  *
  79                  * ..or similar..
  80                  */
  81                 type = commit_type;
  82         } else if (S_ISDIR(mode)) {
  83                 if (show_recursive(base, baselen, pathname)) {
  84                         retval = READ_TREE_RECURSIVE;
  85                         if (!(ls_options & LS_SHOW_TREES))
  86                                 return retval;
  87                 }
  88                 type = tree_type;
  89         }
  90         else if (ls_options & LS_TREE_ONLY)
  91                 return 0;
  92
  93         if (chomp_prefix &&
  94             (baselen < chomp_prefix || memcmp(ls_tree_prefix, base, chomp_prefix)))
  95                 return 0;
  96
  97         if (!(ls_options & LS_NAME_ONLY)) {
  98                 if (ls_options & LS_SHOW_SIZE) {
  99                         if (!strcmp(type, blob_type)) {
 100                                 sha1_object_info(sha1, &size);
 101                                 printf("%06o %s %s %7lu\t", mode, type,
 102                                        abbrev ? find_unique_abbrev(sha1, abbrev)
 103                                               : sha1_to_hex(sha1),
 104                                        size);
 105                         } else
 106                                 printf("%06o %s %s %7c\t", mode, type,
 107                                        abbrev ? find_unique_abbrev(sha1, abbrev)
 108                                               : sha1_to_hex(sha1),
 109                                        '-');
 110                 } else
 111                         printf("%06o %s %s\t", mode, type,
 112                                abbrev ? find_unique_abbrev(sha1, abbrev)
 113                                       : sha1_to_hex(sha1));
 114         }
 115         write_name_quoted(base + chomp_prefix, baselen - chomp_prefix,
 116                           pathname,
 117                           line_termination, stdout);
 118         putchar(line_termination);
 119         return retval;
 120 }
 121
 122 int cmd_ls_tree(int argc, const char **argv, const char *prefix)
 123 {
 124         unsigned char sha1[20];
 125         struct tree *tree;
 126
 127         git_config(git_default_config);
 128         ls_tree_prefix = prefix;
 129         if (prefix && *prefix)
 130                 chomp_prefix = strlen(prefix);
 131         while (1 < argc && argv[1][0] == '-') {
 132                 switch (argv[1][1]) {
 133                 case 'z':
 134                         line_termination = 0;
 135                         break;
 136                 case 'r':
 137                         ls_options |= LS_RECURSIVE;
 138                         break;
 139                 case 'd':
 140                         ls_options |= LS_TREE_ONLY;
 141                         break;
 142                 case 't':
 143                         ls_options |= LS_SHOW_TREES;
 144                         break;
 145                 case 'l':
 146                         ls_options |= LS_SHOW_SIZE;
 147                         break;
 148                 case '-':
 149                         if (!strcmp(argv[1]+2, "name-only") ||
 150                             !strcmp(argv[1]+2, "name-status")) {
 151                                 ls_options |= LS_NAME_ONLY;
 152                                 break;
 153                         }
 154                         if (!strcmp(argv[1]+2, "long")) {
 155                                 ls_options |= LS_SHOW_SIZE;
 156                                 break;
 157                         }
 158                         if (!strcmp(argv[1]+2, "full-name")) {
 159                                 chomp_prefix = 0;
 160                                 break;
 161                         }
 162                         if (!prefixcmp(argv[1]+2, "abbrev=")) {
 163                                 abbrev = strtoul(argv[1]+9, NULL, 10);
 164                                 if (abbrev && abbrev < MINIMUM_ABBREV)
 165                                         abbrev = MINIMUM_ABBREV;
 166                                 else if (abbrev > 40)
 167                                         abbrev = 40;
 168                                 break;
 169                         }
 170                         if (!strcmp(argv[1]+2, "abbrev")) {
 171                                 abbrev = DEFAULT_ABBREV;
 172                                 break;
 173                         }
 174                         /* otherwise fallthru */
 175                 default:
 176                         usage(ls_tree_usage);
 177                 }
 178                 argc--; argv++;
 179         }
 180         /* -d -r should imply -t, but -d by itself should not have to. */
 181         if ( (LS_TREE_ONLY|LS_RECURSIVE) ==
 182             ((LS_TREE_ONLY|LS_RECURSIVE) & ls_options))
 183                 ls_options |= LS_SHOW_TREES;
 184
 185         if (argc < 2)
 186                 usage(ls_tree_usage);
 187         if (get_sha1(argv[1], sha1))
 188                 die("Not a valid object name %s", argv[1]);
 189
 190         pathspec = get_pathspec(prefix, argv + 2);
 191         tree = parse_tree_indirect(sha1);
 192         if (!tree)
 193                 die("not a tree object");
 194         read_tree_recursive(tree, "", 0, 0, pathspec, show_tree);
 195
 196         return 0;
 197 }