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 #include "parse-options.h"
  13
  14 static int line_termination = '\n';
  15 #define LS_RECURSIVE 1
  16 #define LS_TREE_ONLY 2
  17 #define LS_SHOW_TREES 4
  18 #define LS_NAME_ONLY 8
  19 #define LS_SHOW_SIZE 16
  20 static int abbrev;
  21 static int ls_options;
  22 static const char **pathspec;
  23 static int chomp_prefix;
  24 static const char *ls_tree_prefix;
  25
  26 static const  char * const ls_tree_usage[] = {
  27         "git ls-tree [<options>] <tree-ish> [path...]",
  28         NULL
  29 };
  30
  31 static int show_recursive(const char *base, int baselen, const char *pathname)
  32 {
  33         const char **s;
  34
  35         if (ls_options & LS_RECURSIVE)
  36                 return 1;
  37
  38         s = pathspec;
  39         if (!s)
  40                 return 0;
  41
  42         for (;;) {
  43                 const char *spec = *s++;
  44                 int len, speclen;
  45
  46                 if (!spec)
  47                         return 0;
  48                 if (strncmp(base, spec, baselen))
  49                         continue;
  50                 len = strlen(pathname);
  51                 spec += baselen;
  52                 speclen = strlen(spec);
  53                 if (speclen <= len)
  54                         continue;
  55                 if (memcmp(pathname, spec, len))
  56                         continue;
  57                 return 1;
  58         }
  59 }
  60
  61 static int show_tree(const unsigned char *sha1, const char *base, int baselen,
  62                 const char *pathname, unsigned mode, int stage, void *context)
  63 {
  64         int retval = 0;
  65         const char *type = blob_type;
  66
  67         if (S_ISGITLINK(mode)) {
  68                 /*
  69                  * Maybe we want to have some recursive version here?
  70                  *
  71                  * Something similar to this incomplete example:
  72                  *
  73                 if (show_subprojects(base, baselen, pathname))
  74                         retval = READ_TREE_RECURSIVE;
  75                  *
  76                  */
  77                 type = commit_type;
  78         } else if (S_ISDIR(mode)) {
  79                 if (show_recursive(base, baselen, pathname)) {
  80                         retval = READ_TREE_RECURSIVE;
  81                         if (!(ls_options & LS_SHOW_TREES))
  82                                 return retval;
  83                 }
  84                 type = tree_type;
  85         }
  86         else if (ls_options & LS_TREE_ONLY)
  87                 return 0;
  88
  89         if (chomp_prefix &&
  90             (baselen < chomp_prefix || memcmp(ls_tree_prefix, base, chomp_prefix)))
  91                 return 0;
  92
  93         if (!(ls_options & LS_NAME_ONLY)) {
  94                 if (ls_options & LS_SHOW_SIZE) {
  95                         char size_text[24];
  96                         if (!strcmp(type, blob_type)) {
  97                                 unsigned long size;
  98                                 if (sha1_object_info(sha1, &size) == OBJ_BAD)
  99                                         strcpy(size_text, "BAD");
 100                                 else
 101                                         snprintf(size_text, sizeof(size_text),
 102                                                  "%lu", size);
 103                         } else
 104                                 strcpy(size_text, "-");
 105                         printf("%06o %s %s %7s\t", mode, type,
 106                                abbrev ? find_unique_abbrev(sha1, abbrev)
 107                                       : sha1_to_hex(sha1),
 108                                size_text);
 109                 } else
 110                         printf("%06o %s %s\t", mode, type,
 111                                abbrev ? find_unique_abbrev(sha1, abbrev)
 112                                       : sha1_to_hex(sha1));
 113         }
 114         write_name_quotedpfx(base + chomp_prefix, baselen - chomp_prefix,
 115                           pathname, stdout, line_termination);
 116         return retval;
 117 }
 118
 119 int cmd_ls_tree(int argc, const char **argv, const char *prefix)
 120 {
 121         unsigned char sha1[20];
 122         struct tree *tree;
 123         int full_tree = 0;
 124         const struct option ls_tree_options[] = {
 125                 OPT_BIT('d', NULL, &ls_options, "only show trees",
 126                         LS_TREE_ONLY),
 127                 OPT_BIT('r', NULL, &ls_options, "recurse into subtrees",
 128                         LS_RECURSIVE),
 129                 OPT_BIT('t', NULL, &ls_options, "show trees when recursing",
 130                         LS_SHOW_TREES),
 131                 OPT_SET_INT('z', NULL, &line_termination,
 132                             "terminate entries with NUL byte", 0),
 133                 OPT_BIT('l', "long", &ls_options, "include object size",
 134                         LS_SHOW_SIZE),
 135                 OPT_BIT(0, "name-only", &ls_options, "list only filenames",
 136                         LS_NAME_ONLY),
 137                 OPT_BIT(0, "name-status", &ls_options, "list only filenames",
 138                         LS_NAME_ONLY),
 139                 OPT_SET_INT(0, "full-name", &chomp_prefix,
 140                             "use full path names", 0),
 141                 OPT_BOOLEAN(0, "full-tree", &full_tree,
 142                             "list entire tree; not just current directory "
 143                             "(implies --full-name)"),
 144                 OPT__ABBREV(&abbrev),
 145                 OPT_END()
 146         };
 147
 148         git_config(git_default_config, NULL);
 149         ls_tree_prefix = prefix;
 150         if (prefix && *prefix)
 151                 chomp_prefix = strlen(prefix);
 152
 153         argc = parse_options(argc, argv, prefix, ls_tree_options,
 154                              ls_tree_usage, 0);
 155         if (full_tree) {
 156                 ls_tree_prefix = prefix = NULL;
 157                 chomp_prefix = 0;
 158         }
 159         /* -d -r should imply -t, but -d by itself should not have to. */
 160         if ( (LS_TREE_ONLY|LS_RECURSIVE) ==
 161             ((LS_TREE_ONLY|LS_RECURSIVE) & ls_options))
 162                 ls_options |= LS_SHOW_TREES;
 163
 164         if (argc < 1)
 165                 usage_with_options(ls_tree_usage, ls_tree_options);
 166         if (get_sha1(argv[0], sha1))
 167                 die("Not a valid object name %s", argv[0]);
 168
 169         pathspec = get_pathspec(prefix, argv + 1);
 170         tree = parse_tree_indirect(sha1);
 171         if (!tree)
 172                 die("not a tree object");
 173         read_tree_recursive(tree, "", 0, 0, pathspec, show_tree, NULL);
 174
 175         return 0;
 176 }