git-ls-tree: add "-t" option to always show the tree entries
[git.git] / 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 static int ls_options = 0;
16 const char **pathspec;
17
18 static const char ls_tree_usage[] =
19         "git-ls-tree [-d] [-r] [-t] [-z] <tree-ish> [path...]";
20
21 static int show_recursive(const char *base, int baselen, const char *pathname)
22 {
23         const char **s;
24
25         if (ls_options & LS_RECURSIVE)
26                 return 1;
27
28         s = pathspec;
29         if (!s)
30                 return 0;
31
32         for (;;) {
33                 const char *spec = *s++;
34                 int len, speclen;
35
36                 if (!spec)
37                         return 0;
38                 if (strncmp(base, spec, baselen))
39                         continue;
40                 len = strlen(pathname);
41                 spec += baselen;
42                 speclen = strlen(spec);
43                 if (speclen <= len)
44                         continue;
45                 if (memcmp(pathname, spec, len))
46                         continue;
47                 return 1;
48         }
49 }
50
51 static int show_tree(unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage)
52 {
53         int retval = 0;
54         const char *type = "blob";
55
56         if (S_ISDIR(mode)) {
57                 if (show_recursive(base, baselen, pathname)) {
58                         retval = READ_TREE_RECURSIVE;
59                         if (!(ls_options & LS_SHOW_TREES))
60                                 return retval;
61                 }
62                 type = "tree";
63         }
64
65         printf("%06o %s %s\t", mode, type, sha1_to_hex(sha1));
66         write_name_quoted(base, baselen, pathname, line_termination, stdout);
67         putchar(line_termination);
68         return retval;
69 }
70
71 int main(int argc, const char **argv)
72 {
73         const char *prefix;
74         unsigned char sha1[20];
75         char *buf;
76         unsigned long size;
77
78         prefix = setup_git_directory();
79         while (1 < argc && argv[1][0] == '-') {
80                 switch (argv[1][1]) {
81                 case 'z':
82                         line_termination = 0;
83                         break;
84                 case 'r':
85                         ls_options |= LS_RECURSIVE;
86                         break;
87                 case 'd':
88                         ls_options |= LS_TREE_ONLY;
89                         break;
90                 case 't':
91                         ls_options |= LS_SHOW_TREES;
92                         break;
93                 default:
94                         usage(ls_tree_usage);
95                 }
96                 argc--; argv++;
97         }
98
99         if (argc < 2)
100                 usage(ls_tree_usage);
101         if (get_sha1(argv[1], sha1) < 0)
102                 usage(ls_tree_usage);
103
104         pathspec = get_pathspec(prefix, argv + 2);
105         buf = read_object_with_reference(sha1, "tree", &size, NULL);
106         if (!buf)
107                 die("not a tree object");
108         read_tree_recursive(buf, size, "", 0, 0, pathspec, show_tree);
109
110         return 0;
111 }