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