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] [--full-tree] [--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, void *context)
  60 {
  61         int retval = 0;
  62         const char *type = blob_type;
  63
  64         if (S_ISGITLINK(mode)) {
  65                 /*
  66                  * Maybe we want to have some recursive version here?
  67                  *
  68                  * Something similar to this incomplete example:
  69                  *
  70                 if (show_subprojects(base, baselen, pathname))
  71                         retval = READ_TREE_RECURSIVE;
  72                  *
  73                  */
  74                 type = commit_type;
  75         } else if (S_ISDIR(mode)) {
  76                 if (show_recursive(base, baselen, pathname)) {
  77                         retval = READ_TREE_RECURSIVE;
  78                         if (!(ls_options & LS_SHOW_TREES))
  79                                 return retval;
  80                 }
  81                 type = tree_type;
  82         }
  83         else if (ls_options & LS_TREE_ONLY)
  84                 return 0;
  85
  86         if (chomp_prefix &&
  87             (baselen < chomp_prefix || memcmp(ls_tree_prefix, base, chomp_prefix)))
  88                 return 0;
  89
  90         if (!(ls_options & LS_NAME_ONLY)) {
  91                 if (ls_options & LS_SHOW_SIZE) {
  92                         char size_text[24];
  93                         if (!strcmp(type, blob_type)) {
  94                                 unsigned long size;
  95                                 if (sha1_object_info(sha1, &size) == OBJ_BAD)
  96                                         strcpy(size_text, "BAD");
  97                                 else
  98                                         snprintf(size_text, sizeof(size_text),
  99                                                  "%lu", size);
 100                         } else
 101                                 strcpy(size_text, "-");
 102                         printf("%06o %s %s %7s\t", mode, type,
 103                                abbrev ? find_unique_abbrev(sha1, abbrev)
 104                                       : sha1_to_hex(sha1),
 105                                size_text);
 106                 } else
 107                         printf("%06o %s %s\t", mode, type,
 108                                abbrev ? find_unique_abbrev(sha1, abbrev)
 109                                       : sha1_to_hex(sha1));
 110         }
 111         write_name_quotedpfx(base + chomp_prefix, baselen - chomp_prefix,
 112                           pathname, stdout, line_termination);
 113         return retval;
 114 }
 115
 116 int cmd_ls_tree(int argc, const char **argv, const char *prefix)
 117 {
 118         unsigned char sha1[20];
 119         struct tree *tree;
 120
 121         git_config(git_default_config, NULL);
 122         ls_tree_prefix = prefix;
 123         if (prefix && *prefix)
 124                 chomp_prefix = strlen(prefix);
 125         while (1 < argc && argv[1][0] == '-') {
 126                 switch (argv[1][1]) {
 127                 case 'z':
 128                         line_termination = 0;
 129                         break;
 130                 case 'r':
 131                         ls_options |= LS_RECURSIVE;
 132                         break;
 133                 case 'd':
 134                         ls_options |= LS_TREE_ONLY;
 135                         break;
 136                 case 't':
 137                         ls_options |= LS_SHOW_TREES;
 138                         break;
 139                 case 'l':
 140                         ls_options |= LS_SHOW_SIZE;
 141                         break;
 142                 case '-':
 143                         if (!strcmp(argv[1]+2, "name-only") ||
 144                             !strcmp(argv[1]+2, "name-status")) {
 145                                 ls_options |= LS_NAME_ONLY;
 146                                 break;
 147                         }
 148                         if (!strcmp(argv[1]+2, "long")) {
 149                                 ls_options |= LS_SHOW_SIZE;
 150                                 break;
 151                         }
 152                         if (!strcmp(argv[1]+2, "full-name")) {
 153                                 chomp_prefix = 0;
 154                                 break;
 155                         }
 156                         if (!strcmp(argv[1]+2, "full-tree")) {
 157                                 ls_tree_prefix = prefix = NULL;
 158                                 chomp_prefix = 0;
 159                                 break;
 160                         }
 161                         if (!prefixcmp(argv[1]+2, "abbrev=")) {
 162                                 abbrev = strtoul(argv[1]+9, NULL, 10);
 163                                 if (abbrev && abbrev < MINIMUM_ABBREV)
 164                                         abbrev = MINIMUM_ABBREV;
 165                                 else if (abbrev > 40)
 166                                         abbrev = 40;
 167                                 break;
 168                         }
 169                         if (!strcmp(argv[1]+2, "abbrev")) {
 170                                 abbrev = DEFAULT_ABBREV;
 171                                 break;
 172                         }
 173                         /* otherwise fallthru */
 174                 default:
 175                         usage(ls_tree_usage);
 176                 }
 177                 argc--; argv++;
 178         }
 179         /* -d -r should imply -t, but -d by itself should not have to. */
 180         if ( (LS_TREE_ONLY|LS_RECURSIVE) ==
 181             ((LS_TREE_ONLY|LS_RECURSIVE) & ls_options))
 182                 ls_options |= LS_SHOW_TREES;
 183
 184         if (argc < 2)
 185                 usage(ls_tree_usage);
 186         if (get_sha1(argv[1], sha1))
 187                 die("Not a valid object name %s", argv[1]);
 188
 189         pathspec = get_pathspec(prefix, argv + 2);
 190         tree = parse_tree_indirect(sha1);
 191         if (!tree)
 192                 die("not a tree object");
 193         read_tree_recursive(tree, "", 0, 0, pathspec, show_tree, NULL);
 194
 195         return 0;
 196 }