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 "quote.h"
  10 #include "builtin.h"
  11
  12 static int line_termination = '\n';
  13 #define LS_RECURSIVE 1
  14 #define LS_TREE_ONLY 2
  15 #define LS_SHOW_TREES 4
  16 #define LS_NAME_ONLY 8
  17 static int abbrev;
  18 static int ls_options;
  19 static const char **pathspec;
  20 static int chomp_prefix;
  21 static const char *ls_tree_prefix;
  22
  23 static const char ls_tree_usage[] =
  24         "git-ls-tree [-d] [-r] [-t] [-z] [--name-only] [--name-status] [--full-name] [--abbrev[=<n>]] <tree-ish> [path...]";
  25
  26 static int show_recursive(const char *base, int baselen, const char *pathname)
  27 {
  28         const char **s;
  29
  30         if (ls_options & LS_RECURSIVE)
  31                 return 1;
  32
  33         s = pathspec;
  34         if (!s)
  35                 return 0;
  36
  37         for (;;) {
  38                 const char *spec = *s++;
  39                 int len, speclen;
  40
  41                 if (!spec)
  42                         return 0;
  43                 if (strncmp(base, spec, baselen))
  44                         continue;
  45                 len = strlen(pathname);
  46                 spec += baselen;
  47                 speclen = strlen(spec);
  48                 if (speclen <= len)
  49                         continue;
  50                 if (memcmp(pathname, spec, len))
  51                         continue;
  52                 return 1;
  53         }
  54 }
  55
  56 static int show_tree(const unsigned char *sha1, const char *base, int baselen,
  57                      const char *pathname, unsigned mode, int stage)
  58 {
  59         int retval = 0;
  60         const char *type = blob_type;
  61
  62         if (S_ISDIR(mode)) {
  63                 if (show_recursive(base, baselen, pathname)) {
  64                         retval = READ_TREE_RECURSIVE;
  65                         if (!(ls_options & LS_SHOW_TREES))
  66                                 return retval;
  67                 }
  68                 type = tree_type;
  69         }
  70         else if (ls_options & LS_TREE_ONLY)
  71                 return 0;
  72
  73         if (chomp_prefix &&
  74             (baselen < chomp_prefix || memcmp(ls_tree_prefix, base, chomp_prefix)))
  75                 return 0;
  76
  77         if (!(ls_options & LS_NAME_ONLY))
  78                 printf("%06o %s %s\t", mode, type,
  79                                 abbrev ? find_unique_abbrev(sha1,abbrev)
  80                                         : sha1_to_hex(sha1));
  81         write_name_quoted(base + chomp_prefix, baselen - chomp_prefix,
  82                           pathname,
  83                           line_termination, stdout);
  84         putchar(line_termination);
  85         return retval;
  86 }
  87
  88 int cmd_ls_tree(int argc, const char **argv, const char *prefix)
  89 {
  90         unsigned char sha1[20];
  91         struct tree *tree;
  92
  93         git_config(git_default_config);
  94         ls_tree_prefix = prefix;
  95         if (prefix && *prefix)
  96                 chomp_prefix = strlen(prefix);
  97         while (1 < argc && argv[1][0] == '-') {
  98                 switch (argv[1][1]) {
  99                 case 'z':
 100                         line_termination = 0;
 101                         break;
 102                 case 'r':
 103                         ls_options |= LS_RECURSIVE;
 104                         break;
 105                 case 'd':
 106                         ls_options |= LS_TREE_ONLY;
 107                         break;
 108                 case 't':
 109                         ls_options |= LS_SHOW_TREES;
 110                         break;
 111                 case '-':
 112                         if (!strcmp(argv[1]+2, "name-only") ||
 113                             !strcmp(argv[1]+2, "name-status")) {
 114                                 ls_options |= LS_NAME_ONLY;
 115                                 break;
 116                         }
 117                         if (!strcmp(argv[1]+2, "full-name")) {
 118                                 chomp_prefix = 0;
 119                                 break;
 120                         }
 121                         if (!strncmp(argv[1]+2, "abbrev=",7)) {
 122                                 abbrev = strtoul(argv[1]+9, NULL, 10);
 123                                 if (abbrev && abbrev < MINIMUM_ABBREV)
 124                                         abbrev = MINIMUM_ABBREV;
 125                                 else if (abbrev > 40)
 126                                         abbrev = 40;
 127                                 break;
 128                         }
 129                         if (!strcmp(argv[1]+2, "abbrev")) {
 130                                 abbrev = DEFAULT_ABBREV;
 131                                 break;
 132                         }
 133                         /* otherwise fallthru */
 134                 default:
 135                         usage(ls_tree_usage);
 136                 }
 137                 argc--; argv++;
 138         }
 139         /* -d -r should imply -t, but -d by itself should not have to. */
 140         if ( (LS_TREE_ONLY|LS_RECURSIVE) ==
 141             ((LS_TREE_ONLY|LS_RECURSIVE) & ls_options))
 142                 ls_options |= LS_SHOW_TREES;
 143
 144         if (argc < 2)
 145                 usage(ls_tree_usage);
 146         if (get_sha1(argv[1], sha1))
 147                 die("Not a valid object name %s", argv[1]);
 148
 149         pathspec = get_pathspec(prefix, argv + 2);
 150         tree = parse_tree_indirect(sha1);
 151         if (!tree)
 152                 die("not a tree object");
 153         read_tree_recursive(tree, "", 0, 0, pathspec, show_tree);
 154
 155         return 0;
 156 }