summaryrefslogtreecommitdiff
path: root/ls-tree.c
blob: 4231c4b234d8c8a5a35adb3d15ad9cd1f7dcf51a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
/*
 * GIT - The information manager from hell
 *
 * Copyright (C) Linus Torvalds, 2005
 */
#include "cache.h"
 
int line_termination = '\n';
int recursive = 0;
 
struct path_prefix {
	struct path_prefix *prev;
	const char *name;
};
 
static void print_path_prefix(struct path_prefix *prefix)
{
	if (prefix) {
		if (prefix->prev)
			print_path_prefix(prefix->prev);
		fputs(prefix->name, stdout);
		putchar('/');
	}
}
 
static void list_recursive(void *buffer,
			   const unsigned char *type,
			   unsigned long size,
			   struct path_prefix *prefix)
{
	struct path_prefix this_prefix;
	this_prefix.prev = prefix;
 
	if (strcmp(type, "tree"))
		die("expected a 'tree' node");
 
	while (size) {
		int namelen = strlen(buffer)+1;
		void *eltbuf;
		char elttype[20];
		unsigned long eltsize;
		unsigned char *sha1 = buffer + namelen;
		char *path = strchr(buffer, ' ') + 1;
		unsigned int mode;
 
		if (size < namelen + 20 || sscanf(buffer, "%o", &mode) != 1)
			die("corrupt 'tree' file");
		buffer = sha1 + 20;
		size -= namelen + 20;
 
		printf("%06o\t%s\t%s\t", mode,
		       S_ISDIR(mode) ? "tree" : "blob",
		       sha1_to_hex(sha1));
		print_path_prefix(prefix);
		fputs(path, stdout);
		putchar(line_termination);
 
		if (! recursive || ! S_ISDIR(mode))
			continue;
 
		if (! (eltbuf = read_sha1_file(sha1, elttype, &eltsize)) ) {
			error("cannot read %s", sha1_to_hex(sha1));
			continue;
		}
		this_prefix.name = path;
		list_recursive(eltbuf, elttype, eltsize, &this_prefix);
		free(eltbuf);
	}
}
 
static int list(unsigned char *sha1)
{
	void *buffer;
	unsigned long size;
 
	buffer = read_object_with_reference(sha1, "tree", &size, 0);
	if (!buffer)
		die("unable to read sha1 file");
	list_recursive(buffer, "tree", size, NULL);
	free(buffer);
	return 0;
}
 
static const char *ls_tree_usage = "ls-tree [-r] [-z] <key>";
 
int main(int argc, char **argv)
{
	unsigned char sha1[20];
 
	while (1 < argc && argv[1][0] == '-') {
		switch (argv[1][1]) {
		case 'z':
			line_termination = 0;
			break;
		case 'r':
			recursive = 1;
			break;
		default:
			usage(ls_tree_usage);
		}
		argc--; argv++;
	}
 
	if (argc != 2)
		usage(ls_tree_usage);
	if (get_sha1(argv[1], sha1) < 0)
		usage(ls_tree_usage);
	if (list(sha1) < 0)
		die("list failed");
	return 0;
}