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
138
139
|
/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "common.h"
#include "git2/sys/filter.h"
#include "filter.h"
#include "str.h"
static int ident_find_id(
const char **id_start, const char **id_end, const char *start, size_t len)
{
const char *end = start + len, *found = NULL;
while (len > 3 && (found = memchr(start, '$', len)) != NULL) {
size_t remaining = (size_t)(end - found) - 1;
if (remaining < 3)
return GIT_ENOTFOUND;
start = found + 1;
len = remaining;
if (start[0] == 'I' && start[1] == 'd')
break;
}
if (len < 3 || !found)
return GIT_ENOTFOUND;
*id_start = found;
if ((found = memchr(start + 2, '$', len - 2)) == NULL)
return GIT_ENOTFOUND;
*id_end = found + 1;
return 0;
}
static int ident_insert_id(
git_str *to, const git_str *from, const git_filter_source *src)
{
char oid[GIT_OID_MAX_HEXSIZE + 1];
const char *id_start, *id_end, *from_end = from->ptr + from->size;
size_t need_size;
/* replace $Id$ with blob id */
if (!git_filter_source_id(src))
return GIT_PASSTHROUGH;
git_oid_tostr(oid, sizeof(oid), git_filter_source_id(src));
if (ident_find_id(&id_start, &id_end, from->ptr, from->size) < 0)
return GIT_PASSTHROUGH;
need_size = (size_t)(id_start - from->ptr) +
5 /* "$Id: " */ + GIT_OID_MAX_HEXSIZE + 2 /* " $" */ +
(size_t)(from_end - id_end);
if (git_str_grow(to, need_size) < 0)
return -1;
git_str_set(to, from->ptr, (size_t)(id_start - from->ptr));
git_str_put(to, "$Id: ", 5);
git_str_puts(to, oid);
git_str_put(to, " $", 2);
git_str_put(to, id_end, (size_t)(from_end - id_end));
return git_str_oom(to) ? -1 : 0;
}
static int ident_remove_id(
git_str *to, const git_str *from)
{
const char *id_start, *id_end, *from_end = from->ptr + from->size;
size_t need_size;
if (ident_find_id(&id_start, &id_end, from->ptr, from->size) < 0)
return GIT_PASSTHROUGH;
need_size = (size_t)(id_start - from->ptr) +
4 /* "$Id$" */ + (size_t)(from_end - id_end);
if (git_str_grow(to, need_size) < 0)
return -1;
git_str_set(to, from->ptr, (size_t)(id_start - from->ptr));
git_str_put(to, "$Id$", 4);
git_str_put(to, id_end, (size_t)(from_end - id_end));
return git_str_oom(to) ? -1 : 0;
}
static int ident_apply(
git_filter *self,
void **payload,
git_str *to,
const git_str *from,
const git_filter_source *src)
{
GIT_UNUSED(self); GIT_UNUSED(payload);
/* Don't filter binary files */
if (git_str_is_binary(from))
return GIT_PASSTHROUGH;
if (git_filter_source_mode(src) == GIT_FILTER_SMUDGE)
return ident_insert_id(to, from, src);
else
return ident_remove_id(to, from);
}
static int ident_stream(
git_writestream **out,
git_filter *self,
void **payload,
const git_filter_source *src,
git_writestream *next)
{
return git_filter_buffered_stream_new(out,
self, ident_apply, NULL, payload, src, next);
}
git_filter *git_ident_filter_new(void)
{
git_filter *f = git__calloc(1, sizeof(git_filter));
if (f == NULL)
return NULL;
f->version = GIT_FILTER_VERSION;
f->attributes = "+ident"; /* apply to files with ident attribute set */
f->shutdown = git_filter_free;
f->stream = ident_stream;
return f;
}
|
