remove unnecessary initializations
[git/git.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 "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 }