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