Merge branch 'jk/execv-dashed-external'
[git] / 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 #include "pathspec.h"
14
15 static int line_termination = '\n';
16 #define LS_RECURSIVE 1
17 #define LS_TREE_ONLY 2
18 #define LS_SHOW_TREES 4
19 #define LS_NAME_ONLY 8
20 #define LS_SHOW_SIZE 16
21 static int abbrev;
22 static int ls_options;
23 static struct pathspec pathspec;
24 static int chomp_prefix;
25 static const char *ls_tree_prefix;
26
27 static const  char * const ls_tree_usage[] = {
28         N_("git ls-tree [<options>] <tree-ish> [<path>...]"),
29         NULL
30 };
31
32 static int show_recursive(const char *base, int baselen, const char *pathname)
33 {
34         int i;
35
36         if (ls_options & LS_RECURSIVE)
37                 return 1;
38
39         if (!pathspec.nr)
40                 return 0;
41
42         for (i = 0; i < pathspec.nr; i++) {
43                 const char *spec = pathspec.items[i].match;
44                 int len, speclen;
45
46                 if (strncmp(base, spec, baselen))
47                         continue;
48                 len = strlen(pathname);
49                 spec += baselen;
50                 speclen = strlen(spec);
51                 if (speclen <= len)
52                         continue;
53                 if (spec[len] && spec[len] != '/')
54                         continue;
55                 if (memcmp(pathname, spec, len))
56                         continue;
57                 return 1;
58         }
59         return 0;
60 }
61
62 static int show_tree(const unsigned char *sha1, struct strbuf *base,
63                 const char *pathname, unsigned mode, int stage, void *context)
64 {
65         int retval = 0;
66         int baselen;
67         const char *type = blob_type;
68
69         if (S_ISGITLINK(mode)) {
70                 /*
71                  * Maybe we want to have some recursive version here?
72                  *
73                  * Something similar to this incomplete example:
74                  *
75                 if (show_subprojects(base, baselen, pathname))
76                         retval = READ_TREE_RECURSIVE;
77                  *
78                  */
79                 type = commit_type;
80         } else if (S_ISDIR(mode)) {
81                 if (show_recursive(base->buf, base->len, 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 (!(ls_options & LS_NAME_ONLY)) {
92                 if (ls_options & LS_SHOW_SIZE) {
93                         char size_text[24];
94                         if (!strcmp(type, blob_type)) {
95                                 unsigned long size;
96                                 if (sha1_object_info(sha1, &size) == OBJ_BAD)
97                                         xsnprintf(size_text, sizeof(size_text),
98                                                   "BAD");
99                                 else
100                                         xsnprintf(size_text, sizeof(size_text),
101                                                   "%lu", size);
102                         } else
103                                 xsnprintf(size_text, sizeof(size_text), "-");
104                         printf("%06o %s %s %7s\t", mode, type,
105                                find_unique_abbrev(sha1, abbrev),
106                                size_text);
107                 } else
108                         printf("%06o %s %s\t", mode, type,
109                                find_unique_abbrev(sha1, abbrev));
110         }
111         baselen = base->len;
112         strbuf_addstr(base, pathname);
113         write_name_quoted_relative(base->buf,
114                                    chomp_prefix ? ls_tree_prefix : NULL,
115                                    stdout, line_termination);
116         strbuf_setlen(base, baselen);
117         return retval;
118 }
119
120 int cmd_ls_tree(int argc, const char **argv, const char *prefix)
121 {
122         unsigned char sha1[20];
123         struct tree *tree;
124         int i, full_tree = 0;
125         const struct option ls_tree_options[] = {
126                 OPT_BIT('d', NULL, &ls_options, N_("only show trees"),
127                         LS_TREE_ONLY),
128                 OPT_BIT('r', NULL, &ls_options, N_("recurse into subtrees"),
129                         LS_RECURSIVE),
130                 OPT_BIT('t', NULL, &ls_options, N_("show trees when recursing"),
131                         LS_SHOW_TREES),
132                 OPT_SET_INT('z', NULL, &line_termination,
133                             N_("terminate entries with NUL byte"), 0),
134                 OPT_BIT('l', "long", &ls_options, N_("include object size"),
135                         LS_SHOW_SIZE),
136                 OPT_BIT(0, "name-only", &ls_options, N_("list only filenames"),
137                         LS_NAME_ONLY),
138                 OPT_BIT(0, "name-status", &ls_options, N_("list only filenames"),
139                         LS_NAME_ONLY),
140                 OPT_SET_INT(0, "full-name", &chomp_prefix,
141                             N_("use full path names"), 0),
142                 OPT_BOOL(0, "full-tree", &full_tree,
143                          N_("list entire tree; not just current directory "
144                             "(implies --full-name)")),
145                 OPT__ABBREV(&abbrev),
146                 OPT_END()
147         };
148
149         git_config(git_default_config, NULL);
150         ls_tree_prefix = prefix;
151         if (prefix && *prefix)
152                 chomp_prefix = strlen(prefix);
153
154         argc = parse_options(argc, argv, prefix, ls_tree_options,
155                              ls_tree_usage, 0);
156         if (full_tree) {
157                 ls_tree_prefix = prefix = NULL;
158                 chomp_prefix = 0;
159         }
160         /* -d -r should imply -t, but -d by itself should not have to. */
161         if ( (LS_TREE_ONLY|LS_RECURSIVE) ==
162             ((LS_TREE_ONLY|LS_RECURSIVE) & ls_options))
163                 ls_options |= LS_SHOW_TREES;
164
165         if (argc < 1)
166                 usage_with_options(ls_tree_usage, ls_tree_options);
167         if (get_sha1(argv[0], sha1))
168                 die("Not a valid object name %s", argv[0]);
169
170         /*
171          * show_recursive() rolls its own matching code and is
172          * generally ignorant of 'struct pathspec'. The magic mask
173          * cannot be lifted until it is converted to use
174          * match_pathspec() or tree_entry_interesting()
175          */
176         parse_pathspec(&pathspec, PATHSPEC_ALL_MAGIC &
177                                   ~(PATHSPEC_FROMTOP | PATHSPEC_LITERAL),
178                        PATHSPEC_PREFER_CWD,
179                        prefix, argv + 1);
180         for (i = 0; i < pathspec.nr; i++)
181                 pathspec.items[i].nowildcard_len = pathspec.items[i].len;
182         pathspec.has_wildcard = 0;
183         tree = parse_tree_indirect(sha1);
184         if (!tree)
185                 die("not a tree object");
186         return !!read_tree_recursive(tree, "", 0, 0, &pathspec, show_tree, NULL);
187 }