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
112
113
114
115
116
117
118
119
120
121
|
/*
* Copyright (C) 2005 Junio C Hamano
*/
#include "cache.h"
#include "commit.h"
#include "pull.h"
static int use_link = 0;
static int use_symlink = 0;
static int use_filecopy = 1;
static char *path;
int fetch(unsigned char *sha1)
{
static int object_name_start = -1;
static char filename[PATH_MAX];
char *hex = sha1_to_hex(sha1);
const char *dest_filename = sha1_file_name(sha1);
if (object_name_start < 0) {
strcpy(filename, path); /* e.g. git.git */
strcat(filename, "/objects/");
object_name_start = strlen(filename);
}
filename[object_name_start+0] = hex[0];
filename[object_name_start+1] = hex[1];
filename[object_name_start+2] = '/';
strcpy(filename + object_name_start + 3, hex + 2);
if (use_link) {
if (!link(filename, dest_filename)) {
pull_say("link %s\n", hex);
return 0;
}
/* If we got ENOENT there is no point continuing. */
if (errno == ENOENT) {
fprintf(stderr, "does not exist %s\n", filename);
return -1;
}
}
if (use_symlink && !symlink(filename, dest_filename)) {
pull_say("symlink %s\n", hex);
return 0;
}
if (use_filecopy) {
int ifd, ofd, status;
struct stat st;
void *map;
ifd = open(filename, O_RDONLY);
if (ifd < 0 || fstat(ifd, &st) < 0) {
close(ifd);
fprintf(stderr, "cannot open %s\n", filename);
return -1;
}
map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, ifd, 0);
close(ifd);
if (-1 == (int)(long)map) {
fprintf(stderr, "cannot mmap %s\n", filename);
return -1;
}
ofd = open(dest_filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
status = ((ofd < 0) ||
(write(ofd, map, st.st_size) != st.st_size));
munmap(map, st.st_size);
close(ofd);
if (status)
fprintf(stderr, "cannot write %s\n", dest_filename);
else
pull_say("copy %s\n", hex);
return status;
}
fprintf(stderr, "failed to copy %s with given copy methods.\n", hex);
return -1;
}
static const char *local_pull_usage =
"git-local-pull [-c] [-t] [-a] [-l] [-s] [-n] [-v] commit-id path";
/*
* By default we only use file copy.
* If -l is specified, a hard link is attempted.
* If -s is specified, then a symlink is attempted.
* If -n is _not_ specified, then a regular file-to-file copy is done.
*/
int main(int argc, char **argv)
{
char *commit_id;
int arg = 1;
while (arg < argc && argv[arg][0] == '-') {
if (argv[arg][1] == 't')
get_tree = 1;
else if (argv[arg][1] == 'c')
get_history = 1;
else if (argv[arg][1] == 'a') {
get_all = 1;
get_tree = 1;
get_history = 1;
}
else if (argv[arg][1] == 'l')
use_link = 1;
else if (argv[arg][1] == 's')
use_symlink = 1;
else if (argv[arg][1] == 'n')
use_filecopy = 0;
else if (argv[arg][1] == 'v')
get_verbosely = 1;
else
usage(local_pull_usage);
arg++;
}
if (argc < arg + 2)
usage(local_pull_usage);
commit_id = argv[arg];
path = argv[arg + 1];
if (pull(commit_id))
return 1;
return 0;
}
|
