[PATCH] Teach diff-tree about commit objects
[git/git.git] / ls-tree.c
... / ...
CommitLineData
1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
6#include "cache.h"
7
8int line_termination = '\n';
9int recursive = 0;
10
11struct path_prefix {
12 struct path_prefix *prev;
13 const char *name;
14};
15
16static void print_path_prefix(struct path_prefix *prefix)
17{
18 if (prefix) {
19 if (prefix->prev)
20 print_path_prefix(prefix->prev);
21 fputs(prefix->name, stdout);
22 putchar('/');
23 }
24}
25
26static void list_recursive(void *buffer,
27 unsigned char *type,
28 unsigned long size,
29 struct path_prefix *prefix)
30{
31 struct path_prefix this_prefix;
32 this_prefix.prev = prefix;
33
34 if (strcmp(type, "tree"))
35 die("expected a 'tree' node");
36
37 while (size) {
38 int namelen = strlen(buffer)+1;
39 void *eltbuf;
40 char elttype[20];
41 unsigned long eltsize;
42 unsigned char *sha1 = buffer + namelen;
43 char *path = strchr(buffer, ' ') + 1;
44 unsigned int mode;
45
46 if (size < namelen + 20 || sscanf(buffer, "%o", &mode) != 1)
47 die("corrupt 'tree' file");
48 buffer = sha1 + 20;
49 size -= namelen + 20;
50
51 printf("%06o\t%s\t%s\t", mode,
52 S_ISDIR(mode) ? "tree" : "blob",
53 sha1_to_hex(sha1));
54 print_path_prefix(prefix);
55 fputs(path, stdout);
56 putchar(line_termination);
57
58 if (! recursive || ! S_ISDIR(mode))
59 continue;
60
61 if (! (eltbuf = read_sha1_file(sha1, elttype, &eltsize)) ) {
62 error("cannot read %s", sha1_to_hex(sha1));
63 continue;
64 }
65 this_prefix.name = path;
66 list_recursive(eltbuf, elttype, eltsize, &this_prefix);
67 free(eltbuf);
68 }
69}
70
71static int list(unsigned char *sha1)
72{
73 void *buffer;
74 unsigned long size;
75 char type[20];
76
77 buffer = read_sha1_file(sha1, type, &size);
78 if (!buffer)
79 die("unable to read sha1 file");
80 list_recursive(buffer, type, size, NULL);
81 return 0;
82}
83
84static const char *ls_tree_usage = "ls-tree [-r] [-z] <key>";
85
86int main(int argc, char **argv)
87{
88 unsigned char sha1[20];
89
90 while (1 < argc && argv[1][0] == '-') {
91 switch (argv[1][1]) {
92 case 'z':
93 line_termination = 0;
94 break;
95 case 'r':
96 recursive = 1;
97 break;
98 default:
99 usage(ls_tree_usage);
100 }
101 argc--; argv++;
102 }
103
104 if (argc != 2)
105 usage(ls_tree_usage);
106 if (get_sha1_hex(argv[1], sha1) < 0)
107 usage(ls_tree_usage);
108 sha1_file_directory = getenv(DB_ENVIRONMENT);
109 if (!sha1_file_directory)
110 sha1_file_directory = DEFAULT_DB_ENVIRONMENT;
111 if (list(sha1) < 0)
112 die("list failed");
113 return 0;
114}