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
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
|
#include "cache.h"
#include "commit.h"
#include "pull.h"
#include <curl/curl.h>
#include <curl/easy.h>
static CURL *curl;
static char *base;
static SHA_CTX c;
static z_stream stream;
static int local;
static int zret;
static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
void *data) {
unsigned char expn[4096];
size_t size = eltsize * nmemb;
int posn = 0;
do {
ssize_t retval = write(local, ptr + posn, size - posn);
if (retval < 0)
return posn;
posn += retval;
} while (posn < size);
stream.avail_in = size;
stream.next_in = ptr;
do {
stream.next_out = expn;
stream.avail_out = sizeof(expn);
zret = inflate(&stream, Z_SYNC_FLUSH);
SHA1_Update(&c, expn, sizeof(expn) - stream.avail_out);
} while (stream.avail_in && zret == Z_OK);
return size;
}
int fetch(unsigned char *sha1)
{
char *hex = sha1_to_hex(sha1);
char *filename = sha1_file_name(sha1);
unsigned char real_sha1[20];
char *url;
char *posn;
local = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
if (local < 0)
return error("Couldn't open %s\n", filename);
memset(&stream, 0, sizeof(stream));
inflateInit(&stream);
SHA1_Init(&c);
curl_easy_setopt(curl, CURLOPT_FILE, NULL);
curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
url = xmalloc(strlen(base) + 50);
strcpy(url, base);
posn = url + strlen(base);
strcpy(posn, "objects/");
posn += 8;
memcpy(posn, hex, 2);
posn += 2;
*(posn++) = '/';
strcpy(posn, hex + 2);
curl_easy_setopt(curl, CURLOPT_URL, url);
if (curl_easy_perform(curl))
return error("Couldn't get %s for %s\n", url, hex);
close(local);
inflateEnd(&stream);
SHA1_Final(real_sha1, &c);
if (zret != Z_STREAM_END) {
unlink(filename);
return error("File %s (%s) corrupt\n", hex, url);
}
if (memcmp(sha1, real_sha1, 20)) {
unlink(filename);
return error("File %s has bad hash\n", hex);
}
pull_say("got %s\n", hex);
return 0;
}
int main(int argc, char **argv)
{
char *commit_id;
char *url;
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] == 'd') {
get_delta = 0;
} else if (!strcmp(argv[arg], "--recover")) {
get_delta = 2;
} else if (argv[arg][1] == 'a') {
get_all = 1;
get_tree = 1;
get_history = 1;
} else if (argv[arg][1] == 'v') {
get_verbosely = 1;
}
arg++;
}
if (argc < arg + 2) {
usage("git-http-pull [-c] [-t] [-a] [-d] [-v] [--recover] commit-id url");
return 1;
}
commit_id = argv[arg];
url = argv[arg + 1];
curl_global_init(CURL_GLOBAL_ALL);
curl = curl_easy_init();
base = url;
if (pull(commit_id))
return 1;
curl_global_cleanup();
return 0;
}
|